In:
Applied Physics Letters, AIP Publishing, Vol. 88, No. 16 ( 2006-04-17)
Abstract:
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 (∼110S∕cm at 300K) and a much weaker temperature dependence of resistance [R(4K)∕R(300K)=5.1] as compared with those of a single polyaniline microtube [σRT=30–40S∕cm and R(4K)∕R(300K)=16.2] . The power-law dependence of R(T)∝T−β, with β=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 H2 dependent positive magnetoresistance at 2, 4, and 6K.
Type of Medium:
Online Resource
ISSN:
0003-6951
,
1077-3118
Language:
English
Publisher:
AIP Publishing
Publication Date:
2006
detail.hit.zdb_id:
211245-0
detail.hit.zdb_id:
1469436-0