Abstracts2014‎ > ‎

René Schubel: Chemical doping and functionalization of SWNTs

posted 7 Aug 2014, 06:01 by Lisbeth Kirk Mynster
René Schubel1, Rainer Jordan1 
1 Department of Macromolecular Chemistry, TU Dresden, Mommsenstraße 4, 01069 Dresden, Germany 

Carbon Nanotubes are one of the most promising materials for post silicon electronics.
Aim of this work is to build a field effect transistor (FET) with single-walled carbon nanotubes (SWNTs) for advanced electronics especially for wireless communications. It is desired to create an amplifier based on one‑dimensional carbon material with the two-dimensional honeycomb lattice. To improve the properties of SWNTs it’s important to modify them for better current-voltage characteristics, electron transport, band gap and other electrical characteristics.
Here we show different approaches for the modifications. In both cases it is possible to adjust the properties of SWNTs by grafting density and also functional groups.
First one is the use of diazonium salts, which are able to react directly with the SWNTs and form covalently bonds. This results in a modified CNT with tuneable D/G ratio.

The second approach is with the help of different polymer. Here we have a grafting to the SWNTs and a following polymerization from the nanotube only with the help of UV-light. This surface-initiated photografting and photopolymerization (SIPGP) is a versatile and fast method for a covalently modification of SWNTs, without the need of pre-treatment. 

René Schubel is currently a PhD student at TU Dresden under supervision of Prof. Dr. Rainer Jordan. His primary research is the chemical modification of single-walled carbon nanotubes with the help of especially polymers, but also diazonium salts.
He received his B.Sc. degree 2010 in Chemistry about self-initiated photografting and photopolymerization (SIPGP) on cellulose. He obtained his M.Sc. 2013 about synthesis and characterization of hydrogels for biomedical applications. Currently he is a member of the “Center for Advancing Electronics Dresden” (cfaed).