Reversible Control of Third-Order Optical Nonlinearity of DNA Decorated Carbon Nanotube Hybrids
| Autor: | Susan D. Allen, Alexandru S. Biris, Wei Zhao, Fumiya Watanabe, Jianfeng Xu, Liangmin Zhang, Michael B. Sullivan, Ben Rougeau, Scott W. Reeve, Jacquelyn Thomas |
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| Rok vydání: | 2010 |
| Předmět: |
Nanotechnology
Carbon nanotube Redox Article Surfaces Coatings and Films Electronic Optical and Magnetic Materials law.invention Third order Optical nonlinearity chemistry.chemical_compound symbols.namesake General Energy chemistry Chemical physics law symbols Physical and Theoretical Chemistry Hydrogen peroxide Raman spectroscopy HOMO/LUMO DNA |
| Zdroj: | The Journal of Physical Chemistry C. 114:22697-22702 |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/jp107726j |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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