Electrochemical gating and molecular adsorption on carbon nanotubes

Moonsub Shim

doi:10.1117/12.612820

18 August 2005 Electrochemical gating and molecular adsorption on carbon nanotubes

Moonsub Shim

Author Affiliations +

Proceedings Volume 5929, Physical Chemistry of Interfaces and Nanomaterials IV; 592913 (2005) https://doi.org/10.1117/12.612820
Event: Optics and Photonics 2005, 2005, San Diego, California, United States

Abstract

Highly sensitive response of semiconducting single-walled carbon nanotubes (SWNTs) to molecular adsorption may lead to a unique direction in exploiting their exceptional electrical properties. For example, simultaneous doping and nearly ideal gate efficiencies are achieved with polymer electrolytes as gating medium for nanotube transistors. However, highly sensitive responses can also lead to difficulties in interpretation of many observations as exemplified by the controversy surrounding whether oxygen adsorption causes doping or changes in the nature of SWNT-metal contacts. Effects of molecular adsorption, both covalent and non-covalent, on the electronic properties of SWNTs are discussed. How electronically selective covalent chemistry changes Raman scattering and electrical conductivity of individual metallic and semiconducting as well as random networks of SWNTs are first discussed. Non-covalent adsorption of polymers is then explored where electrochemical gating can be applied to allow both chemical and electrostatic control of charge carriers.

Citation Download Citation

Moonsub Shim "Electrochemical gating and molecular adsorption on carbon nanotubes", Proc. SPIE 5929, Physical Chemistry of Interfaces and Nanomaterials IV, 592913 (18 August 2005); https://doi.org/10.1117/12.612820

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