The Applications of Carbon Nanotubes in Electrical and Optical Nanobiosensor

doi:10.7517/j.issn.1674-0475.2011.01.70

Abstract

Abstract: Carbon nanotubes (CNTs) have attracted great attention in many fields due to their unique physical and electrochemical properties,such as large specific surface area,strong electron transfer capability,good adsorption performance,etc.Immobilization of enzymes,proteins,DNA and other biomacromolecules to the surface of carbon nanotubes can be achieved through covalent and non-covalent interactions,including physical absorption,electrostatic and hydrophobic interactions,which facilitates a direct,fast electron transfer from biomolecules to electrode and can be applied in electrochemical biosensors.On the other hand,carbon nanotubes have recently been applied in the design of optical biosensors.Multiple spectral estimation can be employed to quantitative analysis of the biological molecules,through mesurement of the characteritical Raman spectra and fluorescence emission of CNTs in near IR region.In this paper,the application of carbon nanotubes in the fields of electrical and optical biosensors are reviewed.

Key words: carbon nanotubes, electrical biosensor, optical biosensor, nano-biotechnology

CLC Number:

HAO Ping, GAO Yun-yan, OU Zhi-ze, LIU Li-hua, WANG Zhong-li, YIN Wei-feng. The Applications of Carbon Nanotubes in Electrical and Optical Nanobiosensor[J]. Imaging Science and Photochemistry, 2011, 29(1): 70-76.

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