Reversible Control of Third-Order Optical Nonlinearity of DNA Decorated Carbon Nanotube Hybrids

Positive and negative third-order optical nonlinearities have been investigated in single-stranded DNA wrapped semiconducting single-walled carbon nanotubes. It is found that the redox reactions of hydrogen peroxide can reverse the sign of the third-order nonlinearity. The observation proves that th...

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Bibliographic Details
Published in:Journal of physical chemistry. C 2010-12, Vol.114 (51), p.22697-22702
Main Authors: Zhang, Liangmin, Thomas, Jacquelyn, Xu, Jianfeng, Rougeau, Ben, Sullivan, Michael, Reeve, Scott, Allen, Susan D, Watanabe, Fumiya, Biris, Alexandru, Zhao, Wei
Format: Article
Language:English
Subjects:
C: Electron Transport, Optical and Electronic Devices, Hard Matter
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Summary:Positive and negative third-order optical nonlinearities have been investigated in single-stranded DNA wrapped semiconducting single-walled carbon nanotubes. It is found that the redox reactions of hydrogen peroxide can reverse the sign of the third-order nonlinearity. The observation proves that the lowest unoccupied molecular orbital has a lower density of electronic states than that of the highest occupied molecular orbital. A three-energy-level model is used to explain the effect of the redox reactions. Raman spectroscopy has also been used to investigate the interaction between single-walled carbon nanotubes and single-stranded DNA.
ISSN:1932-7447
1932-7455
DOI:10.1021/jp107726j