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Directing and Sensing Changes in Molecular Conformation on Individual Carbon Nanotube Field Effect Transistors

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journal contribution
posted on 02.11.2005, 00:00 by Xuefeng Guo, Limin Huang, Stephen O'Brien, Philip Kim, Colin Nuckolls
This study explores how to populate the surface of the carbon nanotubes with functional molecules that can be toggled back-and-forth between different molecular conformations. The molecules synthesized for this study are tagged with a photoswitchable headgroup and a functional group which directs the assembly on the surface of the carbon nanotubes. Single-walled carbon nanotube field effect transistors switch between high and low conductance as the molecules are switched with light between open and closed conformations. These devices detect the photoswitching of ∼104 molecules.