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Updated: Jun 29, 2026
Engineering Molecular Recognition with Bio-mimetic Polymers on Single Walled Carbon Nanotubes
Published on: January 10, 2017
Adsorption and release behavior of bare and DNA-wrapped-carbon nanotubes on self-assembled monolayer surface
Dan Zheng1, Xueling Li, Jianshan Ye
1College of Chemistry and Chemical Technology, South China University of Technology, Guangzhou 510640, PR China.
Abstract:
The adsorption and release behavior of single-stranded DNA-wrapped single-walled carbon nanotubes (ssDNA-w-SWCNTs) on alkylthiol self-assembled monolayer (SAM) surface was systematically characterized by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). Fast electron transfer between bare Au electrode and redox species blocked by the alkylthiol SAM can be restored by SWCNTs or ssDNA-w-SWCNTs. The release of ssDNA-w-SWCNTs is carried out by positive or negative desorption potential. SWCNTs/SAM or ssDNA-w-SWCNTs/SAM is completely removed from Au surface at +0.90 V or -1.40 V (vs. 3.0 M KCl|Ag|AgCl). The controlled release of SWCNTs/SAM and ssDNA-w-SWCNTs/SAM holds great promise for gene delivering.
