Molecular-resolved imaging of the Hierarchical Self-Assembly of a conductive polymer at single-walled carbon nanotube interfaces
Bell, John M., Goh, Roland, Motta, Nunzio, Musumeci, Anthony W., & Waclawik, Eric R. (2006) Molecular-resolved imaging of the Hierarchical Self-Assembly of a conductive polymer at single-walled carbon nanotube interfaces. In ICONN '06. International Conference on Nanoscience and Nanotechnology, 2006, 3-7 July 2006, USA.
Molecular-resolved real-space images of self-assembled structures of the conductive polymer regioregular poly(3-hexylthiophene) (rrP3HT) on single-walled carbon nanotube (SWNT) substrates were obtained using scanning tunneling microscopy (STM). The STM images revealed that the adsorbed polymer formed a 10 nm thick coating on some SWNT's in agreement with previous transmission electron microscopy results. This thickness corresponds to a coating of ~25 layers of polymer on SWNT, assuming that pi-pi interactions between rrP3HT layers and the underlying SWNT directs the polymer self-assembly process. The polymer backbone interchain spacing (dcc = 1.55 nm) of the outermost layer of adsorbed rrP3HT is approximately 7% larger than is observed for rrP3HT adsorbed on HOPG (dcc = 1.45 nm). The polymer also wraps around the SWNT at an angle with respect to the SWNT long-axis, which indicates that rrP3HT self-assembly is hierarchical. The conductive polymer's deposition occurs with epitaxy and is directed by the underlying SWNT chiral structure.
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|Item Type:||Conference Paper|
|Divisions:||Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering|
|Copyright Owner:||Copyright 2006 IEEE|
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|Deposited On:||12 Sep 2007|
|Last Modified:||29 Feb 2012 23:27|
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