| Autor: |
Xu, Yang, E. Pehrsson, Pehr, Chen, Liwei, Zhang, Ru, Zhao, Wei |
| Zdroj: |
The Journal of Physical Chemistry - Part C; June 2007, Vol. 111 Issue: 24 p8638-8643, 6p |
| Abstrakt: |
The unique optical properties of semiconducting single-walled carbon nanotubes (SWNTs) are exquisitely sensitive to variations in the surrounding environments. Here, we have studied the redox chemistry of SWNTs encased with double-stranded deoxyribonucleic acid (DNA) reacted with either hydrogen peroxide H2O2or glucose in the presence of the glucose oxidase enzyme. The DNA-SWNT hybrids are prepared in aqueous solution by sonication that cuts the DNA into short fragments of 100−300 base pairs which efficiently wrap individual nanotubes. The DNA-SWNT hybrids are optically sensitive to H2O2and glucose, and the hybrid surface can be regenerated by dialytically removing the hydrogen peroxide. This study reinforces the potential of DNA-SWNT hybrids for use in immunoassays and glucose sensing. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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