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Publisher: Springer-Verlag   (Total: 2353 journals)

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Showing 1 - 200 of 2353 Journals sorted alphabetically
3D Research     Hybrid Journal   (Followers: 19, SJR: 0.214, h-index: 10)
4OR: A Quarterly J. of Operations Research     Hybrid Journal   (Followers: 9, SJR: 1.073, h-index: 25)
AAPS J.     Hybrid Journal   (Followers: 20, SJR: 1.192, h-index: 74)
AAPS PharmSciTech     Hybrid Journal   (Followers: 6, SJR: 0.718, h-index: 54)
Abdominal Imaging     Hybrid Journal   (Followers: 14, SJR: 0.723, h-index: 60)
Abhandlungen aus dem Mathematischen Seminar der Universitat Hamburg     Hybrid Journal   (Followers: 2, SJR: 0.447, h-index: 12)
Academic Psychiatry     Full-text available via subscription   (Followers: 22, SJR: 0.492, h-index: 32)
Academic Questions     Hybrid Journal   (Followers: 7, SJR: 0.135, h-index: 6)
Accreditation and Quality Assurance: J. for Quality, Comparability and Reliability in Chemical Measurement     Hybrid Journal   (Followers: 26, SJR: 0.378, h-index: 30)
Acoustical Physics     Hybrid Journal   (Followers: 11, SJR: 0.355, h-index: 20)
Acoustics Australia     Hybrid Journal  
Acta Analytica     Hybrid Journal   (Followers: 7, SJR: 0.387, h-index: 6)
Acta Applicandae Mathematicae     Hybrid Journal   (Followers: 1, SJR: 0.624, h-index: 34)
Acta Biotheoretica     Hybrid Journal   (Followers: 5, SJR: 0.419, h-index: 25)
Acta Diabetologica     Hybrid Journal   (Followers: 14, SJR: 1.318, h-index: 46)
Acta Endoscopica     Hybrid Journal   (Followers: 1, SJR: 0.113, h-index: 8)
acta ethologica     Hybrid Journal   (Followers: 4, SJR: 0.465, h-index: 23)
Acta Geochimica     Hybrid Journal   (Followers: 4)
Acta Geodaetica et Geophysica     Hybrid Journal   (Followers: 1, SJR: 0.294, h-index: 13)
Acta Geotechnica     Hybrid Journal   (Followers: 7, SJR: 1.818, h-index: 22)
Acta Informatica     Hybrid Journal   (Followers: 5, SJR: 0.524, h-index: 32)
Acta Mathematica     Hybrid Journal   (Followers: 11, SJR: 8.021, h-index: 47)
Acta Mathematica Hungarica     Hybrid Journal   (Followers: 2, SJR: 0.53, h-index: 29)
Acta Mathematica Sinica, English Series     Hybrid Journal   (Followers: 5, SJR: 0.406, h-index: 30)
Acta Mathematica Vietnamica     Hybrid Journal   (SJR: 0.451, h-index: 5)
Acta Mathematicae Applicatae Sinica, English Series     Hybrid Journal   (SJR: 0.22, h-index: 20)
Acta Mechanica     Hybrid Journal   (Followers: 19, SJR: 0.898, h-index: 52)
Acta Mechanica Sinica     Hybrid Journal   (Followers: 5, SJR: 0.426, h-index: 29)
Acta Metallurgica Sinica (English Letters)     Hybrid Journal   (Followers: 5, SJR: 0.525, h-index: 18)
Acta Meteorologica Sinica     Hybrid Journal   (Followers: 3, SJR: 0.524, h-index: 14)
Acta Neurochirurgica     Hybrid Journal   (Followers: 6, SJR: 0.833, h-index: 73)
Acta Neurologica Belgica     Hybrid Journal   (SJR: 0.348, h-index: 27)
Acta Neuropathologica     Hybrid Journal   (Followers: 5, SJR: 6.61, h-index: 117)
Acta Oceanologica Sinica     Hybrid Journal   (Followers: 3, SJR: 0.295, h-index: 17)
Acta Parasitologica     Hybrid Journal   (Followers: 9, SJR: 0.581, h-index: 28)
Acta Physiologiae Plantarum     Hybrid Journal   (Followers: 2, SJR: 0.551, h-index: 39)
Acta Politica     Hybrid Journal   (Followers: 13, SJR: 0.658, h-index: 20)
Activitas Nervosa Superior     Hybrid Journal  
adhäsion KLEBEN & DICHTEN     Hybrid Journal   (Followers: 5, SJR: 0.103, h-index: 4)
ADHD Attention Deficit and Hyperactivity Disorders     Hybrid Journal   (Followers: 20, SJR: 0.871, h-index: 15)
Adhesion Adhesives & Sealants     Hybrid Journal   (Followers: 7)
Administration and Policy in Mental Health and Mental Health Services Research     Partially Free   (Followers: 15, SJR: 0.795, h-index: 40)
Adsorption     Hybrid Journal   (Followers: 4, SJR: 0.774, h-index: 52)
Advances in Applied Clifford Algebras     Hybrid Journal   (Followers: 3, SJR: 0.319, h-index: 15)
Advances in Atmospheric Sciences     Hybrid Journal   (Followers: 34, SJR: 0.959, h-index: 44)
Advances in Computational Mathematics     Hybrid Journal   (Followers: 15, SJR: 1.255, h-index: 44)
Advances in Contraception     Hybrid Journal   (Followers: 3)
Advances in Data Analysis and Classification     Hybrid Journal   (Followers: 54, SJR: 1.113, h-index: 14)
Advances in Gerontology     Partially Free   (Followers: 9, SJR: 0.141, h-index: 3)
Advances in Health Sciences Education     Hybrid Journal   (Followers: 22, SJR: 1.397, h-index: 42)
Advances in Manufacturing     Hybrid Journal   (Followers: 3, SJR: 0.2, h-index: 4)
Advances in Polymer Science     Hybrid Journal   (Followers: 41, SJR: 0.637, h-index: 89)
Advances in Therapy     Hybrid Journal   (Followers: 5, SJR: 0.79, h-index: 44)
Aegean Review of the Law of the Sea and Maritime Law     Hybrid Journal   (Followers: 7)
Aequationes Mathematicae     Hybrid Journal   (Followers: 2, SJR: 0.882, h-index: 23)
Aerobiologia     Hybrid Journal   (Followers: 1, SJR: 0.511, h-index: 36)
Aesthetic Plastic Surgery     Hybrid Journal   (Followers: 9, SJR: 0.821, h-index: 49)
African Archaeological Review     Hybrid Journal   (Followers: 15, SJR: 0.612, h-index: 24)
Afrika Matematika     Hybrid Journal   (Followers: 1, SJR: 0.248, h-index: 6)
AGE     Hybrid Journal   (Followers: 7, SJR: 1.358, h-index: 33)
Ageing Intl.     Hybrid Journal   (Followers: 7, SJR: 0.337, h-index: 10)
Aggiornamenti CIO     Hybrid Journal   (Followers: 1)
Aging Clinical and Experimental Research     Hybrid Journal   (Followers: 3, SJR: 0.529, h-index: 55)
Agricultural Research     Hybrid Journal   (Followers: 3)
Agriculture and Human Values     Hybrid Journal   (Followers: 12, SJR: 1.197, h-index: 49)
Agroforestry Systems     Hybrid Journal   (Followers: 20, SJR: 0.64, h-index: 56)
Agronomy for Sustainable Development     Hybrid Journal   (Followers: 10, SJR: 1.732, h-index: 59)
AI & Society     Hybrid Journal   (Followers: 7, SJR: 0.171, h-index: 19)
AIDS and Behavior     Hybrid Journal   (Followers: 13, SJR: 2.006, h-index: 71)
Air Quality, Atmosphere & Health     Hybrid Journal   (Followers: 3, SJR: 0.706, h-index: 19)
Akupunktur & Aurikulomedizin     Full-text available via subscription   (Followers: 1)
Algebra and Logic     Hybrid Journal   (Followers: 3, SJR: 0.566, h-index: 18)
Algebra Universalis     Hybrid Journal   (Followers: 2, SJR: 0.388, h-index: 22)
Algebras and Representation Theory     Hybrid Journal   (Followers: 1, SJR: 0.868, h-index: 20)
Algorithmica     Hybrid Journal   (Followers: 7, SJR: 0.898, h-index: 56)
Allergo J.     Full-text available via subscription   (Followers: 1, SJR: 0.183, h-index: 20)
Allergo J. Intl.     Hybrid Journal   (Followers: 2)
Alpine Botany     Hybrid Journal   (Followers: 4, SJR: 0.729, h-index: 20)
ALTEX : Alternatives to Animal Experimentation     Open Access   (Followers: 3, SJR: 1.392, h-index: 32)
AMBIO     Hybrid Journal   (Followers: 15, SJR: 1.094, h-index: 87)
American J. of Cardiovascular Drugs     Hybrid Journal   (Followers: 13, SJR: 0.864, h-index: 39)
American J. of Community Psychology     Hybrid Journal   (Followers: 23, SJR: 1.237, h-index: 83)
American J. of Criminal Justice     Hybrid Journal   (Followers: 6, SJR: 0.634, h-index: 13)
American J. of Cultural Sociology     Hybrid Journal   (Followers: 11, SJR: 0.283, h-index: 3)
American J. of Dance Therapy     Hybrid Journal   (Followers: 4, SJR: 0.175, h-index: 13)
American J. of Potato Research     Hybrid Journal   (Followers: 2, SJR: 0.558, h-index: 35)
American J. of Psychoanalysis     Hybrid Journal   (Followers: 21, SJR: 0.293, h-index: 13)
American Sociologist     Hybrid Journal   (Followers: 12, SJR: 0.18, h-index: 13)
Amino Acids     Hybrid Journal   (Followers: 8, SJR: 1.362, h-index: 83)
AMS Review     Partially Free   (Followers: 4)
Analog Integrated Circuits and Signal Processing     Hybrid Journal   (Followers: 5, SJR: 0.21, h-index: 37)
Analysis and Mathematical Physics     Hybrid Journal   (Followers: 3, SJR: 0.665, h-index: 7)
Analysis in Theory and Applications     Hybrid Journal   (Followers: 1)
Analysis of Verbal Behavior     Hybrid Journal   (Followers: 5)
Analytical and Bioanalytical Chemistry     Hybrid Journal   (Followers: 28, SJR: 1.096, h-index: 123)
Anatomical Science Intl.     Hybrid Journal   (Followers: 2, SJR: 0.301, h-index: 26)
Angewandte Schmerztherapie und Palliativmedizin     Hybrid Journal  
Angiogenesis     Hybrid Journal   (Followers: 3, SJR: 2.212, h-index: 69)
Animal Cognition     Hybrid Journal   (Followers: 16, SJR: 1.122, h-index: 55)
Annales françaises de médecine d'urgence     Hybrid Journal   (Followers: 1, SJR: 0.156, h-index: 4)
Annales Henri Poincaré     Hybrid Journal   (Followers: 3, SJR: 1.377, h-index: 32)
Annales mathématiques du Québec     Hybrid Journal   (Followers: 4)
Annali dell'Universita di Ferrara     Hybrid Journal   (SJR: 0.504, h-index: 14)
Annali di Matematica Pura ed Applicata     Hybrid Journal   (Followers: 1, SJR: 1.167, h-index: 26)
Annals of Behavioral Medicine     Hybrid Journal   (Followers: 11, SJR: 2.112, h-index: 98)
Annals of Biomedical Engineering     Hybrid Journal   (Followers: 18, SJR: 1.182, h-index: 94)
Annals of Combinatorics     Hybrid Journal   (Followers: 3, SJR: 0.849, h-index: 15)
Annals of Data Science     Hybrid Journal   (Followers: 9)
Annals of Dyslexia     Hybrid Journal   (Followers: 9, SJR: 0.857, h-index: 40)
Annals of Finance     Hybrid Journal   (Followers: 28, SJR: 0.686, h-index: 14)
Annals of Forest Science     Hybrid Journal   (Followers: 4, SJR: 0.929, h-index: 57)
Annals of Global Analysis and Geometry     Hybrid Journal   (Followers: 1, SJR: 1.136, h-index: 23)
Annals of Hematology     Hybrid Journal   (Followers: 14, SJR: 1.117, h-index: 62)
Annals of Mathematics and Artificial Intelligence     Hybrid Journal   (Followers: 6, SJR: 0.593, h-index: 42)
Annals of Microbiology     Hybrid Journal   (Followers: 10, SJR: 0.402, h-index: 26)
Annals of Nuclear Medicine     Hybrid Journal   (Followers: 5, SJR: 0.68, h-index: 45)
Annals of Operations Research     Hybrid Journal   (Followers: 8, SJR: 1.186, h-index: 78)
Annals of Ophthalmology     Hybrid Journal   (Followers: 10)
Annals of Regional Science     Hybrid Journal   (Followers: 7, SJR: 0.405, h-index: 42)
Annals of Software Engineering     Hybrid Journal   (Followers: 12)
Annals of Solid and Structural Mechanics     Hybrid Journal   (Followers: 10, SJR: 0.553, h-index: 8)
Annals of Surgical Oncology     Hybrid Journal   (Followers: 13, SJR: 1.902, h-index: 127)
Annals of Telecommunications     Hybrid Journal   (Followers: 7, SJR: 0.315, h-index: 25)
Annals of the Institute of Statistical Mathematics     Hybrid Journal   (Followers: 1, SJR: 0.931, h-index: 31)
Antonie van Leeuwenhoek     Hybrid Journal   (Followers: 5, SJR: 0.992, h-index: 87)
Apidologie     Hybrid Journal   (Followers: 4, SJR: 1.14, h-index: 57)
APOPTOSIS     Hybrid Journal   (Followers: 8, SJR: 1.554, h-index: 87)
Applicable Algebra in Engineering, Communication and Computing     Hybrid Journal   (Followers: 2, SJR: 0.354, h-index: 27)
Applications of Mathematics     Hybrid Journal   (Followers: 1, SJR: 0.274, h-index: 20)
Applied Biochemistry and Biotechnology     Hybrid Journal   (Followers: 44, SJR: 0.575, h-index: 80)
Applied Biochemistry and Microbiology     Hybrid Journal   (Followers: 17, SJR: 0.267, h-index: 26)
Applied Cancer Research     Open Access  
Applied Categorical Structures     Hybrid Journal   (Followers: 2, SJR: 0.361, h-index: 21)
Applied Composite Materials     Hybrid Journal   (Followers: 48, SJR: 0.705, h-index: 35)
Applied Entomology and Zoology     Partially Free   (Followers: 2, SJR: 0.554, h-index: 34)
Applied Geomatics     Hybrid Journal   (Followers: 3, SJR: 0.323, h-index: 9)
Applied Geophysics     Hybrid Journal   (Followers: 8, SJR: 0.541, h-index: 13)
Applied Intelligence     Hybrid Journal   (Followers: 12, SJR: 0.777, h-index: 43)
Applied Magnetic Resonance     Hybrid Journal   (Followers: 4, SJR: 0.358, h-index: 34)
Applied Mathematics & Optimization     Hybrid Journal   (Followers: 4, SJR: 0.955, h-index: 33)
Applied Mathematics - A J. of Chinese Universities     Hybrid Journal   (SJR: 0.275, h-index: 8)
Applied Mathematics and Mechanics     Hybrid Journal   (Followers: 4, SJR: 0.37, h-index: 26)
Applied Microbiology and Biotechnology     Hybrid Journal   (Followers: 62, SJR: 1.262, h-index: 161)
Applied Physics A     Hybrid Journal   (Followers: 7, SJR: 0.535, h-index: 121)
Applied Physics B: Lasers and Optics     Hybrid Journal   (Followers: 23, SJR: 0.983, h-index: 104)
Applied Psychophysiology and Biofeedback     Hybrid Journal   (Followers: 8, SJR: 0.677, h-index: 47)
Applied Research in Quality of Life     Hybrid Journal   (Followers: 10, SJR: 0.288, h-index: 15)
Applied Solar Energy     Hybrid Journal   (Followers: 17, SJR: 0.251, h-index: 6)
Applied Spatial Analysis and Policy     Hybrid Journal   (Followers: 4, SJR: 0.351, h-index: 9)
Aquaculture Intl.     Hybrid Journal   (Followers: 22, SJR: 0.613, h-index: 40)
Aquarium Sciences and Conservation     Hybrid Journal   (Followers: 1)
Aquatic Ecology     Hybrid Journal   (Followers: 30, SJR: 0.646, h-index: 44)
Aquatic Geochemistry     Hybrid Journal   (Followers: 4, SJR: 0.764, h-index: 39)
Aquatic Sciences     Hybrid Journal   (Followers: 12, SJR: 1.172, h-index: 53)
Arabian J. for Science and Engineering     Hybrid Journal   (Followers: 5, SJR: 0.345, h-index: 20)
Arabian J. of Geosciences     Hybrid Journal   (Followers: 1, SJR: 0.417, h-index: 16)
Archaeological and Anthropological Sciences     Hybrid Journal   (Followers: 21, SJR: 1.056, h-index: 15)
Archaeologies     Hybrid Journal   (Followers: 12, SJR: 0.397, h-index: 13)
Archiv der Mathematik     Hybrid Journal   (Followers: 1, SJR: 0.597, h-index: 29)
Archival Science     Hybrid Journal   (Followers: 53, SJR: 0.804, h-index: 22)
Archive for History of Exact Sciences     Hybrid Journal   (Followers: 7, SJR: 0.28, h-index: 15)
Archive for Mathematical Logic     Hybrid Journal   (Followers: 1, SJR: 0.946, h-index: 23)
Archive for Rational Mechanics and Analysis     Hybrid Journal   (SJR: 4.091, h-index: 66)
Archive of Applied Mechanics     Hybrid Journal   (Followers: 4, SJR: 0.865, h-index: 40)
Archives and Museum Informatics     Hybrid Journal   (Followers: 124)
Archives of Computational Methods in Engineering     Hybrid Journal   (Followers: 4, SJR: 2.841, h-index: 40)
Archives of Dermatological Research     Hybrid Journal   (Followers: 6, SJR: 0.9, h-index: 65)
Archives of Environmental Contamination and Toxicology     Hybrid Journal   (Followers: 10, SJR: 0.846, h-index: 84)
Archives of Gynecology and Obstetrics     Hybrid Journal   (Followers: 17, SJR: 0.695, h-index: 47)
Archives of Microbiology     Hybrid Journal   (Followers: 8, SJR: 0.702, h-index: 85)
Archives of Orthopaedic and Trauma Surgery     Hybrid Journal   (Followers: 8, SJR: 1.039, h-index: 56)
Archives of Osteoporosis     Hybrid Journal   (Followers: 2, SJR: 1.092, h-index: 13)
Archives of Sexual Behavior     Hybrid Journal   (Followers: 9, SJR: 1.198, h-index: 74)
Archives of Toxicology     Hybrid Journal   (Followers: 17, SJR: 1.595, h-index: 76)
Archives of Virology     Hybrid Journal   (Followers: 5, SJR: 1.086, h-index: 90)
Archives of Women's Mental Health     Hybrid Journal   (Followers: 13, SJR: 1.264, h-index: 50)
Archivio di Ortopedia e Reumatologia     Hybrid Journal  
Archivum Immunologiae et Therapiae Experimentalis     Hybrid Journal   (Followers: 2, SJR: 1.2, h-index: 42)
ArgoSpine News & J.     Hybrid Journal   (SJR: 0.102, h-index: 3)
Argumentation     Hybrid Journal   (Followers: 5, SJR: 0.295, h-index: 18)
Arid Ecosystems     Hybrid Journal   (Followers: 3)
Arkiv för Matematik     Hybrid Journal   (Followers: 1, SJR: 0.948, h-index: 22)
Arnold Mathematical J.     Hybrid Journal   (Followers: 1)
Arthropod-Plant Interactions     Hybrid Journal   (Followers: 1, SJR: 0.797, h-index: 17)
Arthroskopie     Hybrid Journal   (Followers: 1, SJR: 0.145, h-index: 8)
Artificial Intelligence and Law     Hybrid Journal   (Followers: 10, SJR: 0.288, h-index: 25)
Artificial Intelligence Review     Hybrid Journal   (Followers: 14, SJR: 0.948, h-index: 48)
Artificial Life and Robotics     Hybrid Journal   (Followers: 8, SJR: 0.231, h-index: 14)
Asia Europe J.     Hybrid Journal   (Followers: 4, SJR: 0.247, h-index: 9)
Asia Pacific Education Review     Hybrid Journal   (Followers: 9, SJR: 0.371, h-index: 17)
Asia Pacific J. of Management     Hybrid Journal   (Followers: 12, SJR: 1.676, h-index: 50)
Asia-Pacific Education Researcher     Hybrid Journal   (Followers: 11, SJR: 0.353, h-index: 13)
Asia-Pacific Financial Markets     Hybrid Journal   (Followers: 2, SJR: 0.19, h-index: 15)
Asia-Pacific J. of Atmospheric Sciences     Hybrid Journal   (Followers: 20, SJR: 1.006, h-index: 14)
Asian Business & Management     Hybrid Journal   (Followers: 7, SJR: 0.41, h-index: 10)
Asian J. of Business Ethics     Hybrid Journal   (Followers: 7)
Asian J. of Criminology     Hybrid Journal   (Followers: 5, SJR: 0.263, h-index: 8)
AStA Advances in Statistical Analysis     Hybrid Journal   (Followers: 2, SJR: 0.681, h-index: 15)
AStA Wirtschafts- und Sozialstatistisches Archiv     Hybrid Journal   (Followers: 5, SJR: 0.195, h-index: 5)
ästhetische dermatologie & kosmetologie     Full-text available via subscription  

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Journal Cover Applied Physics A
  [SJR: 0.535]   [H-I: 121]   [7 followers]  Follow
    
   Hybrid Journal Hybrid journal (It can contain Open Access articles)
   ISSN (Print) 0947-8396 - ISSN (Online) 1432-0630
   Published by Springer-Verlag Homepage  [2353 journals]
  • Preparation of nitrogen-doped graphene/activated carbon composite papers
           to enhance energy storage in supercapacitors
    • Authors: Yong-feng Li; Yan-zhen Liu; Yu Liang; Xiao-hui Guo; Cheng-meng Chen
      Abstract: Abstract This report presents a facile and effective method to synthesize freestanding nitrogen-doped reduced graphene oxide (rGO)/activated carbon (AC) composite papers for supercapacitors by a method combining vacuum filtration with post-annealing in NH3 atmosphere. The effect of activated carbon contents on the microstructure and capacitive behavior of the resulting composite papers before and after the annealing was investigated by X-ray diffraction, scanning electron microscopy, and Raman and X-ray photoelectron spectroscopy. Results show that the composite paper with a 30% activated carbon loading has a high nitrogen content of 14.6 at% and superior capacitive performance (308 F/g, 1 A/g) to the other composite papers with various activated carbon loadings. Nitrogen was doped and GO reduced during the annealing. The rGO nanosheets acted as a framework, and the AC particles served as spacers to avoid agglomeration of graphene sheets. The high capacitance of the composite paper is ascribed to the electric double-layer behavior and the reversible redox reactions of the nitrogen and oxygen groups. The entire process is simple, environmental friendly and easily scalable for mass production.
      PubDate: 2017-08-04
      DOI: 10.1007/s00339-017-1178-9
      Issue No: Vol. 123, No. 9 (2017)
       
  • Charge plasma technique based dopingless accumulation mode junctionless
           cylindrical surrounding gate MOSFET: analog performance improvement
    • Authors: Nitin Trivedi; Manoj Kumar; Subhasis Haldar; S. S. Deswal; Mridula Gupta; R. S. Gupta
      Abstract: Abstract A charge plasma technique based dopingless (DL) accumulation mode (AM) junctionless (JL) cylindrical surrounding gate (CSG) MOSFET has been proposed and extensively investigated. Proposed device has no physical junction at source to channel and channel to drain interface. The complete silicon pillar has been considered as undoped. The high free electron density or induced N+ region is designed by keeping the work function of source/drain metal contacts lower than the work function of undoped silicon. Thus, its fabrication complexity is drastically reduced by curbing the requirement of high temperature doping techniques. The electrical/analog characteristics for the proposed device has been extensively investigated using the numerical simulation and are compared with conventional junctionless cylindrical surrounding gate (JL-CSG) MOSFET with identical dimensions. For the numerical simulation purpose ATLAS-3D device simulator is used. The results show that the proposed device is more short channel immune to conventional JL-CSG MOSFET and suitable for faster switching applications due to higher I ON/I OFF ratio.
      PubDate: 2017-08-02
      DOI: 10.1007/s00339-017-1176-y
      Issue No: Vol. 123, No. 9 (2017)
       
  • Absorption property of C@CIPs composites by the mechanical milling process
    • Authors: Ting Liu; Li Zhou; Dianliang Zheng; Yonggang Xu
      Abstract: Abstract The C@CIPs absorbents were fabricated by the mechanical milling method. The particle morphology and crystal grain structure were characterized by the scanning electron microscopy and the X-ray diffraction patterns, respectively. The complex permittivity and permeability of the absorbing composites added the hybrid particles were tested in 2–18 GHz. The reflection loss (RL) and shielding effectiveness were calculated using the tested parameters. It was found that the MWCNTs were bonded to the CIPs surface. The permittivity and permeability of the C@CIPs were increased as the MWCNTs coated on the CIPs. It was attributed to the dielectric property of MWCNTs, particle shape and the interactions of the two particles according to the Debye equation and the Maxwell–Garnett mixing rule. The C@CIPs composites had a better absorbing property as RL < −4 dB in 4.6–17 GHz with thickness 0.6 mm as well as shielding property (maximum 12.7 dB) in 2–18 GHz. It indicated that C@CIPs might be an effective absorbing/shielding absorbent.
      PubDate: 2017-08-02
      DOI: 10.1007/s00339-017-1175-z
      Issue No: Vol. 123, No. 9 (2017)
       
  • Physical properties in polydomain c/a/c/a phase PbTiO 3 ferroelectric
           thick films: effect of thermal stresses
    • Authors: Gang Bai; Xiaobing Yan; Wei Li; Cunfa Gao
      Abstract: Abstract The thermal stress dependence of the physical properties of polydomain PbTiO3 films on different substrates are investigated using a nonlinear Ginzburg–Landau–Devonshire thermodynamic model as a function of deposition temperature T G and thermal expansion coefficients. It is found that the thermal strain has a large impact on the ferroelectric polarization states and other physical properties for the thicker ferroelectric thin films. Extrinsic contributions from 90° domain wall displacements are found to dramatically impact the dielectric, pyroelectric, and piezoelectric responses. Most importantly, the dielectric and piezoelectric constants in the polydomain c/a/c/a phase is much larger than that of the monodomain c phase, while the results are opposite for the ferroelectric polarization and pyroelectric coefficient. Careful choice of thermal stress and domain states allows one to harness the intrinsic and extrinsic contributions to obtain large physical responses. Our work is in good agreement with experimental results and phase–field simulation.
      PubDate: 2017-08-01
      DOI: 10.1007/s00339-017-1174-0
      Issue No: Vol. 123, No. 8 (2017)
       
  • Observation of room-temperature ferromagnetism in Co-doped Bi 0.5 K 0.5
           TiO 3 materials
    • Authors: Le Viet Cuong; Nguyen Hoang Tuan; Dorj Odkhuu; Duong Van Thiet; Nguyen Huu Dung; Luong Huu Bac; Dang Duc Dung
      Abstract: Abstract We report the band gap modification and strong room ferromagnetism by substituting the Co ions for the Ti site of Bi0.5K0.5TiO3 materials. The predicted band gap of 2.11 eV and magnetic moment of 2.7 μB/Co are reproduced precisely in UV–Vis spectroscopy and superconducting quantum interference device experiments, respectively. We elucidate the driving mechanisms for these results in terms of the spin-exchange splitting between spin subbands in the presence of substitution ions and high-spin crystal field energy spectrum. This method would provide a promising approach to get single-phase multiferroics and resolve the problem of the scarcity of single-phase multiferroics in nature.
      PubDate: 2017-08-01
      DOI: 10.1007/s00339-017-1173-1
      Issue No: Vol. 123, No. 8 (2017)
       
  • Fabrication of resistively-coupled single-electron device using an array
           of gold nanoparticles
    • Authors: Tran Thi Thu Huong; Kazuhiko Matsumoto; Masataka Moriya; Hiroshi Shimada; Yasuo Kimura; Ayumi Hirano-Iwata; Yoshinao Mizugaki
      Abstract: Abstract We demonstrated one type of single-electron device that exhibited electrical characteristics similar to those of resistively-coupled SE transistor (R-SET) at 77 K and room temperature (287 K). Three Au electrodes on an oxidized Si chip served as drain, source, and gate electrodes were formed using electron-beam lithography and evaporation techniques. A narrow (70-nm-wide) gate electrode was patterned using thermal evaporation, whereas wide (800-nm-wide) drain and source electrodes were made using shadow evaporation. Subsequently, aqueous solution of citric acid and 15-nm-diameter gold nanoparticles (Au NPs) and toluene solution of 3-nm-diameter Au NPs chemisorbed via decanethiol were dropped on the chip to make the connections between the electrodes. Current–voltage characteristics between the drain and source electrodes exhibited Coulomb blockade (CB) at both 77 and 287 K. Dependence of the CB region on the gate voltage was similar to that of an R-SET. Simulation results of the model based on the scanning electron microscopy image of the device could reproduce the characteristics like the R-SET.
      PubDate: 2017-07-31
      DOI: 10.1007/s00339-017-1171-3
      Issue No: Vol. 123, No. 8 (2017)
       
  • The abnormal photovoltaic effect in BiFeO 3 thin films modulated by
           bipolar domain orientations and oxygen-vacancy migration
    • Authors: Zilong Bai; Wenping Geng; Yan Zhang; Shuaiqi Xu; Huizhen Guo; Anquan Jiang
      Abstract: Abstract SrRuO3/BiFeO3/SrRuO3 thin-film capacitors were fabricated to investigate the role of mobile oxygen vacancies in a switchable photovoltaic (PV) effect that depends on ferroelectric domain orientations. Normally, the flowing direction of the stabilized photocurrent is opposite to ferroelectric polarization orientation. However, an abnormal overshoot of initial positive transient photocurrent parallel to the ferroelectric polarization could be observed under light illumination for a poled BiFeO3 thin film with the polarization pointing to the bottom electrode. Moreover, the photocurrent has a strong response with respect to voltage poling time and relaxation time after poling, which seems to be correlated with time-dependent migration of oxygen vacancies and concurrent charge trapping effect. Our results not only reveal the scenario how oxygen-vacancy migration and charge trapping effect affect the switchable PV effect, besides ferroelectric polarization, but also are helpful for the understanding and designing of new switchable photoelectric devices.
      PubDate: 2017-07-31
      DOI: 10.1007/s00339-017-1165-1
      Issue No: Vol. 123, No. 8 (2017)
       
  • Comparison of charge transport studies of chemical solution and pulsed
           laser deposited manganite-based thin film devices
    • Authors: K. N. Rathod; Davit Dhruv; Keval Gadani; Hetal Boricha; Sapana Solanki; A. D. Joshi; D. D. Pandya; K. Asokan; P. S. Solanki; N. A. Shah
      Abstract: Abstract The electrical transport properties of manganites play a significant role in the diverse applications of spintronics. In this communication, we report the variation in the electrical transport properties of Y0.95Ca0.05MnO3 (YCMO) films deposited on (100) single crystalline Si substrates by two different deposition techniques: chemical solution deposition (CSD) and pulsed laser deposition (PLD). The charge conduction mechanisms responsible for the electrical transport properties of these films have been studied across the YCMO/Si junctions using temperature-dependent current–voltage (I–V) and resistance–voltage characteristics and results have been compared for both the devices fabricated by CSD and PLD techniques. The role of structural strain and space charge limited conduction (SCLC) processes has been discussed to understand the results of I–V and electroresistance (ER) behavior across the junctions. The CSD grown films exhibits better electrical transport properties at the junction, i.e., high current across the junction, low junction resistance and large ER, and this has been discussed in detail on the basis of low structural strain present at the interface.
      PubDate: 2017-07-31
      DOI: 10.1007/s00339-017-1172-2
      Issue No: Vol. 123, No. 8 (2017)
       
  • Impedance spectroscopy study and phase transition in phospho-vanadium
           mixed oxide LiZnV 0.5 P 0.5 O 4
    • Authors: A. Rahal; S. Megdiche Borchani; Kamel Guidara; Makram Megdiche
      Abstract: Abstract An X-ray crystallographic study has allowed us to identify a powder of the type LiZnV0.5P0.5O4, which contains 50% of vanadium and 50% of phosphore, inside the binary system LiZnVO4–LiZnPO4. The structure is isotypic with the phenacite like LiZnP04. X-ray diffraction patterns are indexed according to the lattice parameters of the rhombohedral system and the R3 space group. IR spectra show the presence of VO4 and PO4 groups in the network of this material. The experimental results indicate that \(\sigma_{\text{AC}}\) ( \(\omega\) ) is proportional to \(\left( {\omega^{n} } \right)\) . The activation energy found from the Arrhenius plot confirms that the conduction processing of the material is not due to simple hopping mechanism. The temperature dependence of frequency exponent n was investigated to understanding the conduction mechanism in LiZnV0.5P0.5O4. The non-overlapping small Polaron tunneling (NSPT) model can explain the temperature dependence of the frequency exponent. A phase transition at T = 623 K has been evidenced by Differential scanning calorimetry (DSC) and subsequently confirmed by the analysis of dielectric and electric properties.
      PubDate: 2017-07-31
      DOI: 10.1007/s00339-017-1166-0
      Issue No: Vol. 123, No. 8 (2017)
       
  • On the temperature dependent current transport mechanisms and barrier
           inhomogeneity in Au/SnO 2 –PVA/n-Si Schottky barrier diodes
    • Authors: Ç. Bilkan; Y. Badali; S. Fotouhi-Shablou; Y. Azizian-Kalandaragh; Ş. Altındal
      Abstract: Abstract In this paper, we report the preparation and characterization of SnO2–PVA nanocomposite film as interlayer for Schottky barrier diodes (SBDs). The possible current transport mechanisms (CTMs) of the prepared SBDs were investigated using the forward-bias current–voltage (I–V) characteristics in the temperature range of 80–400 K. The structure of nanocomposite film was characterized by an X-ray diffractometer (XRD) and the surface morphology was investigated using a Scanning Electron Microscopy (SEM) at room temperature. The values of ideality factor (n) and zero-bias barrier height ( \(\overline{\varPhi }_{\text{Bo}}\) ) showed variation with temperature, such that they changed from 19.10 to 3.77 and 0.190 to 0.844 eV, respectively. \(\overline{\varPhi }_{\text{Bo}}\) –n, \(\overline{\varPhi }_{\text{Bo}}\) −q/2kT, and n −1−q/2kT plots were drawn to get evidence to the Gaussian Distribution (GD) of the barrier height (BH). These plots revealed two distinct linear regions with different slopes for low temperatures (80–160 K) (LTs) and high temperatures (180–400 K) (HTs). This behavior is an evidence to the existence double GD of BHs which provides an average value for BH ( \(\overline{\varPhi }_{\text{Bo}}\) ) and a standard deviation (σs) for each region. The high value of n especially at low temperatures was attributed to the existence of interlayer: interface states (N ss) and barrier inhomogeneity at Au/n-Si interface. The values of \(\overline{\varPhi }_{\text{Bo}}\) and σs were obtained from the intercept and slope of mentioned plots as 0.588 and 0.0768 V for LTs and 1.183 eV and 0.158 V for HTs, respectively. Moreover, the modified ln(I s/T 2)−q 2σ s 2 /2k 2 T 2 vs q/kT plot also showed two linear regions. The values of \(\overline{\varPhi }_{\text{Bo}}\) and effective Richardson constant (A *) were extracted from the slope and intercept of this plot as 0.610 eV and 93.13 A/cm2 K2 for LTs and 1.235 eV and 114.65 A/cm2 K2 for HTs, respectively. The value of A* for HTs is very close to the theoretical value (112 A/cm2 K2) of n-type Si. Thus, the forward-bias I–V–T characteristics of Au/SnO2–PVA/n-Si (SBDs) were successfully explained in terms of the thermionic-emission (TE) mechanism with a double GD of BHs.
      PubDate: 2017-07-31
      DOI: 10.1007/s00339-017-1168-y
      Issue No: Vol. 123, No. 8 (2017)
       
  • Dual-band graphene-induced plasmonic quarter-wave plate metasurface in the
           near infrared
    • Authors: Edgar Owiti; Hanning Yang; Calvine Ominde; Xiudong Sun
      Abstract: Abstract Weak graphene plasmon is a key challenge for graphene-based metasurfaces in the visible and near-infrared regions. In this study, we have numerically designed and demonstrated a tunable, ultrathin, hybrid dual-band quarter-wave plate metasurface, which comprises of graphene, metal, and glass. Tunable birefringence has been obtained through the number of layers of graphene, its Fermi energy, metal dimensions, and the periodicity. The design also achieves a 95% polarization conversion ratio from a linear state to a circular state with a near unity value of ellipticity at a design wavelength in the near-infrared. The ultrathin thickness of the structure, 0.1 \(\lambda \) , and an embedding glass makes the structure compact and easily integrable for photonic-sensing application in the near-infrared.
      PubDate: 2017-07-31
      DOI: 10.1007/s00339-017-1147-3
      Issue No: Vol. 123, No. 8 (2017)
       
  • Comprehensive analysis of structure and temperature, frequency and
           concentration-dependent dielectric properties of lithium-substituted
           cobalt ferrites (Li x Co 1-x Fe 2 O 4 )
    • Authors: Safia Anjum; Mehru Nisa; Aneeqa Sabah; M. S. Rafique; Rehana Zia
      Abstract: Abstract This paper has been dedicated to the synthesis and characterization of a series of lithium-substituted cobalt ferrites Li x Co1-x Fe2O4 (x = 0, 0.2, 0.4, 0.6, 0.8, 1). These samples have been prepared using simple ball milling machine through powder metallurgy route. The structural analysis is carried out using X-ray diffractometer and their 3D vitalization is simulated using diamond software. The frequency and temperature-dependent dielectric properties of prepared samples have been measured using inductor capacitor resistor (LCR) meter. The structural analysis confirms that all the prepared samples have inverse cubic spinel structure. It is also revealed that the crystallite size and lattice parameter decrease with the increasing concentration of lithium (Li+1) ions, it is due to the smaller ionic radii of lithium ions. The comprehensive analysis of frequency, concentration and temperature-dependent dielectric properties of prepared samples is described in this paper. It is observed that the dielectric constant and tangent loss have decreased and conductivity increased as the frequency increases. It is also revealed that the dielectric constant, tangent loss and AC conductivity increase as the concentration of lithium increases due to its lower electronegativity value. Temperature plays a vital role in enhancing the dielectric constant, tangent loss and AC conductivity because the mobility of ions increases as the temperature increases.
      PubDate: 2017-07-29
      DOI: 10.1007/s00339-017-1169-x
      Issue No: Vol. 123, No. 8 (2017)
       
  • Synthesis and characterization of polypyrrole and its application for
           solar cell
    • Authors: Faisal M. A. Almuntaser; Sutripto Majumder; Prashant K. Baviskar; Jaydeep V. Sali; B. R. Sankapal
      Abstract: Abstract In this report, the fabrication of a solar cell device with the structures FTO/PPy/PTh/ZnO/Al was performed using wet chemical synthesis methods in open environment. The cost-effective methods like CBD, SILAR, and spin coating have been used for the synthesis. The effect of thickness of PPy active layer on the device performance is investigated. Features such as structural, morphological, and chemical bonding of the layers have been investigated using X-ray diffraction, field emission scanning electron microscopy, and Fourier transform infrared spectroscopy and are discussed herein. Effects of PPy thickness on current–voltage characteristics have been studied under dark and illumination at 1 Sun (100 mW/cm2, AM 1.5 G) condition to study the solar cell performance.
      PubDate: 2017-07-29
      DOI: 10.1007/s00339-017-1131-y
      Issue No: Vol. 123, No. 8 (2017)
       
  • Study of different effects on magnetic properties of MgO-supported
           Fe–Co–Mn oxides
    • Authors: A. M. Davarpanah; M. Arsalanfar
      Abstract: Abstract A new catalyst is produced using Fe(NO3)3·9H2O, Co(NO3)2·6H2O and Mn(NO3)2·4H2O. The magnetic properties of the nanoparticles of “iron–cobalt–manganese catalysts (ICMC)” have been studied, with magnesium oxide as a support employing co-precipitation method. The effects of calcination and drying conditions such as temperature, time, and different percentage of MgO-supported Fe–Co–Mn oxides on the magnetic properties were investigated using vibrating sample magnetometer (VSM). Our results indicated that calcination at 600 °C can change magnetic phase of the sample, and calcination at 700 °C changed the sample from ferromagnetic to superparamagnetic by adding 15% MgO into the ICMC. By increasing the calcination temperature, the values of remnant magnetization (M r) and saturation magnetization (M S) were increased. By increasing the calcination time duration, values of the M r and coercivity (H C) were increased. Furthermore, when the percentages of MgO increased, the values of M r, M S, and H C were decreased. It was observed that most variables in the experiments affected the magnetic properties of the new catalysts.
      PubDate: 2017-07-28
      DOI: 10.1007/s00339-017-1164-2
      Issue No: Vol. 123, No. 8 (2017)
       
  • Tailoring surface and photocatalytic properties of ZnO and nitrogen-doped
           
    • Authors: R. Rangel; V. Cedeño; A. Ramos-Corona; R. Gutiérrez; J. J. Alvarado-Gil; O. Ares; P. Bartolo-Pérez; P. Quintana
      Abstract: Abstract Microwave hydrothermal synthesis, using an experimental 23 factorial design, was used to produce tunable ZnO nano- and microstructures, and their potential as photocatalysts was explored. Photocatalytic reactions were conducted in a microreactor batch system under UV and visible light irradiation, while monitoring methylene blue degradation, as a model system. The variables considered in the microwave reactor to produce ZnO nano- or microstructures, were time, NaOH concentration and synthesis temperature. It was found that, specific surface area and volume/surface area ratio were affected as a consequence of the synthesis conditions. In the second stage, the samples were plasma treated in a nitrogen atmosphere, with the purpose of introducing nitrogen into the ZnO crystalline structure. The central idea is to induce changes in the material structure as well as in its optical absorption, to make the plasma-treated material useful as photocatalyst in the visible region of the electromagnetic spectrum. Pristine ZnO and nitrogen-doped ZnO compounds were characterized by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), specific surface area (BET), XPS, and UV–Vis diffuse reflectance spectroscopy. The results show that the methodology presented in this work is effective in tailoring the specific surface area of the ZnO compounds and incorporation of nitrogen into their structure, factors which in turn, affect its photocatalytic behavior.
      PubDate: 2017-07-28
      DOI: 10.1007/s00339-017-1137-5
      Issue No: Vol. 123, No. 8 (2017)
       
  • Fabrication of three-dimensional microstructures in positive photoresist
           through two-photon direct laser writing
    • Authors: Naoto Tsutsumi; Asato Fukuda; Ryotaro Nakamura; Kenji Kinashi; Wataru Sakai
      Abstract: Three-dimensional (3D) microstructures with micron scale are fabricated in photoresist using two-photon direct laser writing with an infrared femtosecond laser at 800 nm. The positive photoresist of Novolak/diazonaphthoquinone (DNQ) is used for the fabrication of line structures and 3D microstructures. Linewidths of line structures are fabricated with laser power ranging from 1 to 15 mW and scanning speeds ranging from 5 to 50 μm s−1. The obtained linewidth is analyzed using an exposure kinetics model of DNQ for two-photon absorption. Both 3D inversed woodpile structures and helical structures are fabricated. Graphical abstract Two-photon direct laser writing is used to fabricate microstructures in positive photoresist. Microstructures with helical and inversed woodpile shapes were fabricated with positive photoresist Novolak/DNQ using two-photon direct laser writing.
      PubDate: 2017-07-28
      DOI: 10.1007/s00339-017-1170-4
      Issue No: Vol. 123, No. 8 (2017)
       
  • Vibration and bending analyses of magneto–electro–thermo-elastic
           sandwich microplates resting on viscoelastic foundation
    • Authors: Mohammad Arefi; Ashraf M. Zenkour
      Abstract: Abstract Magneto–electro–thermo-mechanical bending and free vibration analysis of a sandwich microplate using strain gradient theory is expressed in this paper. The sandwich plate is made of a core and two integrated piezo-magnetic face sheets. The structure is subjected to electric and magnetic potentials, thermal loadings, and resting on Pasternak’s foundation. Electro-magnetic equations are developed by considering the variation form of Hamilton’s principle. The effects of important parameters of this problem such as applied electric and magnetic potentials, direct and shear parameter of foundation, three microlength-scale parameters, and two parameters of temperature rising are investigated on the vibration and bending results of problem.
      PubDate: 2017-07-28
      DOI: 10.1007/s00339-017-1156-2
      Issue No: Vol. 123, No. 8 (2017)
       
  • Low-temperature photoluminescence study of ZnO:Ni nanowires
    • Authors: Feihong Jiang; Jun Zhang
      Abstract: Abstract ZnO:Ni nanowires have been fabricated through high-temperature vapor–solid deposition process. The morphology of the as-prepared samples was characterized by scanning electron microscopy. The temperature dependent of photoluminescence spectra was investigated. The low-temperature photoluminescence spectrum at 10–150 K shows that there is a multi-peak emission in the UV region. The multi-peak emissions are attributed to neutral acceptor-bound exciton, free electron to acceptor transition (FA), and first- and second-longitudinal optical phonon replicas emission (FA-1LO and FA-2LO), respectively. With increasing temperature, these bands show different temperature dependences. The FA and FA-1LO bands show a normal redshift with the increasing temperature, while the FX and FA-2LO bands exhibit an anomalous behavior. The origins of these bands and their temperature-dependent shifts are discussed.
      PubDate: 2017-07-27
      DOI: 10.1007/s00339-017-1157-1
      Issue No: Vol. 123, No. 8 (2017)
       
  • Factors influencing the tunability of the near-IR absorption band of CuS
           nanoparticles
    • Authors: Delfino Cornejo-Monroy; Luis A. Martínez-Ortega; Zaira Y. Castillo-Morán; Rey D. Molina-Arredondo; Salvador Noriega; Vianey Torres-Argüelles; Jose L. Enriquez-Carrejo
      Abstract: Abstract Owing to the importance of the correct selection of the synthesis parameters when fabricating nanoparticles, a general full factorial design with three factors: pH, thioacetamide/CuCl \(_2{\cdot}\) H \(_2\) O ratio, and stirring time was performed to find the factors affecting the spectral position of the near-infrared (NIR) absorption band of CuS nanoparticles. Based on the results, there is evidence that the peak position depends on one significant interaction, as well as on two main factors. Additionally, taking into account \(R^2\) , we argue that the variability of the wavelength corresponding to peak position of the NIR absorption band can be explained by a linear model with an accuracy above 93%.
      PubDate: 2017-07-27
      DOI: 10.1007/s00339-017-1163-3
      Issue No: Vol. 123, No. 8 (2017)
       
  • Silver nanoprisms/silicone hybrid rubber materials and their optical
           limiting property to femtosecond laser
    • Authors: Chunfang Li; Miao Liu; Nengkai Jiang; Chunlei Wang; Weihong Lin; Dongxiang Li
      Abstract: Abstract Optical limiters against femtosecond laser are essential for eye and sensor protection in optical processing system with femtosecond laser as light source. Anisotropic Ag nanoparticles are expected to develop into optical limiting materials for femtosecond laser pulses. Herein, silver nanoprisms are prepared and coated by silica layer, which are then doped into silicone rubber to obtain hybrid rubber sheets. The silver nanoprisms/silicone hybrid rubber sheets exhibit good optical limiting property to femtosecond laser mainly due to nonlinear optical absorption.
      PubDate: 2017-07-27
      DOI: 10.1007/s00339-017-1135-7
      Issue No: Vol. 123, No. 8 (2017)
       
 
 
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