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Long, Y. Z., Huang, K., Yuan, J. H., Han, D. X., Niu, L., Chen, Z. J., Gu, C. Z., Jin, A. Z. & Duvail, J. L. (2006) Electrical conductivity of a single Au/polyaniline microfiber. Appl. Phys. Lett. 88 162113.
Added by: Florent Boucher (2016-05-12 13:21:37) |
| Type de référence: Article DOI: 10.1063/1.2197929 Numéro d'identification (ISBN etc.): 0003-6951 Clé BibTeX: Long2006b Voir tous les détails bibliographiques  |
Catégories: PMN Mots-clés: Composites, fabrication, gold, nanocomposites, particles, polyaniline nanotube, templates, transport Créateurs: Chen, Duvail, Gu, Han, Huang, Jin, Long, Niu, Yuan Collection: Appl. Phys. Lett. |
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We report the measurements of conductivity, I-V curve, and magnetoresistance of a single Au/polyaniline microfiber with a core-shell structure, on which a pair of platinum microleads was attached by focused ion beam. The Au/polyaniline microfiber shows a much higher conductivity (similar to 110 S/cm at 300 K) and a much weaker temperature dependence of resistance [R(4 K)/R(300 K)=5.1] as compared with those of a single polyaniline microtube [sigma(RT)=30-40 S/cm and R(4 K)/R(300 K)=16.2]. The power-law dependence of R(T)proportional to T-beta, with beta=0.38, indicates that the measured Au/polyaniline microfiber is lying in the critical regime of the metal-insulator transition. In addition, the microfiber shows a H-2 dependent positive magnetoresistance at 2, 4, and 6 K. (c) 2006 American Institute of Physics.
Added by: Florent Boucher |