Goh Roland G S, Bell John M, Motta Nunzio, Waclawik Eric R
Centre for Built Environment and Engineering Research, Queensland University of Technology, GPO Box 2434, Brisbane 400, Australia.
J Nanosci Nanotechnol. 2006 Dec;6(12):3929-33. doi: 10.1166/jnn.2006.678.
Poly(3-hexylthiophene)-single-walled carbon nanotubes (SWNTs) composites were studied using UV-visible absorbance and Raman spectroscopy, scanning tunneling microscopy (STM) and transmission electron microscopy (TEM). Monolayers of regioregular poly(3-hexyl thiophene) (rrP3HT) adsorbed on SWNTs have been imaged using scanning tunneling microscopy (STM) to obtain measurements of the chiral angles at which the thiophene polymer chains wrap around individual carbon nanotubes (41-48 degrees with respect to nanotube axis) and polymer interchain spacings (1.68 angstroms). The rrP3HT interchain distance is greater for rrP3HT monolayers adsorbed onto the curved surfaces of SWNTs than on the flat surfaces of highly ordered pyrolytic graphite samples (1.4 angstroms). UV-vis spectroscopic data provided strong evidence for increased interchain interactions in composites of rrP3HT and SWNTs compared to the pure polymer. The STM local-probe studies of the native polymer and the composites further confirmed that the rrP3HT interacts with carbon nanotubes to produce a highly ordered material at the molecular level.
使用紫外可见吸收光谱和拉曼光谱、扫描隧道显微镜（STM）以及透射电子显微镜（TEM）对聚（3 - 己基噻吩）- 单壁碳纳米管（SWNTs）复合材料进行了研究。利用扫描隧道显微镜（STM）对吸附在单壁碳纳米管上的区域规整聚（3 - 己基噻吩）（rrP3HT）单层进行成像，以测量噻吩聚合物链围绕单个碳纳米管缠绕的手性角（相对于纳米管轴为41 - 48度）以及聚合物链间间距（1.68埃）。与吸附在高度有序热解石墨样品平面上的rrP3HT单层相比，吸附在单壁碳纳米管曲面上的rrP3HT单层的链间距离更大（1.4埃）。紫外可见光谱数据提供了有力证据，表明与纯聚合物相比，rrP3HT和单壁碳纳米管复合材料中的链间相互作用增强。对天然聚合物及其复合材料的STM局部探针研究进一步证实，rrP3HT与碳纳米管相互作用，在分子水平上产生高度有序的材料。
