tailieunhanh - Báo cáo hóa học: " Current–Voltage Characteristics in Individual Polypyrrole Nanotube, Poly(3,4-ethylenedioxythiophene) Nanowire, Polyaniline Nanotube, and CdS Nanorope"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Current–Voltage Characteristics in Individual Polypyrrole Nanotube, Poly(3,4-ethylenedioxythiophene) Nanowire, Polyaniline Nanotube, and CdS Nanorope | Nanoscale Res Lett 2009 4 63-69 DOI S11671-008-9203-8 NANO EXPRESS Current-Voltage Characteristics in Individual Polypyrrole Nanotube Poly 3 4-ethylenedioxythiophene Nanowire Polyaniline Nanotube and CdS Nanorope Zhi-Hua Yin Yun-Ze Long Chang-Zhi Gu Mei-Xiang Wan Jean-Luc Duvail Received 16 September 2008 Accepted 29 October 2008 Published online 20 November 2008 to the authors 2008 Abstract In this paper we focus on current-voltage I V characteristics in several kinds of quasi-one-dimen-sional quasi-1D nanofibers to investigate their electronic transport properties covering a wide temperature range from 300 down to 2 K. Since the complex structures composed of ordered conductive regions in series with disordered barriers in conducting polymer nanotubes wires and CdS nanowires all measured nonlinear I-V characteristics show temperature and field-dependent features and are well fitted to the extended fluctuation-induced tunneling and thermal excitation model Kaiser expression . However we find that there are surprisingly similar deviations emerged between the I-V data and fitting curves at the low bias voltages and low temperatures which can be possibly ascribed to the electron-electron interaction in such quasi-1D systems with inhomogeneous nanostructures. Keywords Conducting polymers I-V characteristics FIT model Nanowires tubes . Yin . Long H College of Physics Science Qingdao University Qingdao 266071 China e-mail . Gu Institute of Physics Chinese Academy of Sciences Beijing 100190 China . Wan Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China . Duvail Institut des Materiaux Jean Rouxel Universite de Nantes CNRS Nantes 44322 France Introduction Recently low-dimensional materials especially nanowires and nanotubes have attracted considerable attention in view of their novel features and electronic device applications in future 1-3 . The unusual electronic transport properties in conducting .