碳纳米管在电化学和光化学纳米生物传感器中的应用

碳纳米管(CNTs)因具有独特的物理化学及电化学性质,如较大的比表面积、较强的电子转移能力和良好的吸附性能等而引起人们的广泛关注.碳纳米管可以通过物理吸附、静电或疏水作用等非共价结合方式或共价连接方式固定生物大分子(如蛋白质、DNA、抗体等),有效地促进生物大分子与电极间直接、快速的电子转移,可应用于多种电化学生物传感...

The Applications of Carbon Nanotubes in Electrical and Optical Nanobiosensor

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.