title: Poly(3-hexylthiophene) nanotubes with tunable aspect ratios and charge transport properties.
abstract: Regioregular poly(3-hexylthiophene) (RR-P3HT) nanotubes (200 nm in diameter) with tunable aspect ratios from 25 to 300 were prepared using a polymer melt wetting technique. Aspect-ratio tunability was achieved by controlling the wetting behavior of RR-P3HT melts in a template. The crystallinity and chain orientation of RR-P3HT were studied by grazing incidence X-ray diffraction, wide-angle X-ray diffraction, and polarized photoluminescence spectroscopy. Results suggest that RR-P3HT chains in the lamellar structure prefer to be perpendicular to the axis of the RR-P3HT nanotubes, forming a face-on conformation in the RR-P3HT nanotubes that leads to increased carrier mobility of RR-P3HT. Field-effect transistors were fabricated based on a single RR-P3HT nanotube and showed a carrier mobility of 0.14 ± 0.02 cm(2)/V·s.
authors.affiliation: Center of Super-Diamond and Advanced Films (COSDAF) and Department of Physics and Materials Science, City University of Hong Kong , Hong Kong, Hong Kong SAR.
authors.forename: Long-Biao
authors.initials: LB
authors.lastname: Huang
authors.forename: Zong-Xiang
authors.initials: ZX
authors.lastname: Xu
authors.forename: Xianfeng
authors.initials: X
authors.lastname: Chen
authors.forename: Wei
authors.initials: W
authors.lastname: Tian
authors.forename: Su-Ting
authors.initials: ST
authors.lastname: Han
authors.forename: Ye
authors.initials: Y
authors.lastname: Zhou
authors.forename: Jia-Ju
authors.initials: JJ
authors.lastname: Xu
authors.forename: Xiong-Bo
authors.initials: XB
authors.lastname: Yang
authors.forename: Vellaisamy A L
authors.initials: VA
authors.lastname: Roy