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Single-stranded DNA functionalized single-walled carbon nanotubes for microbiosensors via layer-by-layer
Zhuo Kang1, Xiaoqin Yan, Yue Zhang
1State Key Laboratory for Advanced Metals and Materials, School of Materials Science and Engineering, and §Key Laboratory of New Energy Materials and Technologies, University of Science and Technology Beijing , Beijing 100083, China.
ACS Applied Materials & Interfaces
|March 11, 2014
Summary
Single-stranded DNA (ssDNA) functionalized carbon nanotubes enable layer-by-layer assembly for high-performance glucose biosensors. This biofunctionalization retains nanotube properties for advanced nanotechnology applications.
Area of Science:
- Nanotechnology
- Biomaterials Science
- Electrochemistry
Background:
- Single-walled carbon nanotubes (SWNTs) possess excellent properties but require biofunctionalization for specific applications.
- Facial noncovalent adsorption of single-stranded DNA (ssDNA) onto SWNTs offers a method to impart biofunctionality while preserving SWNT characteristics.
Purpose of the Study:
- To demonstrate the biofunctionalization of SWNTs using ssDNA adsorption.
- To utilize the resulting ssDNA-SWNTs for layer-by-layer electrostatic self-assembly.
- To fabricate a high-performance glucose microbiosensor based on this self-assembled structure.
Main Methods:
- Facial noncovalent adsorption of ssDNA onto SWNTs.
- Layer-by-layer electrostatic self-assembly utilizing the negative surface charge of ssDNA-SWNTs.
- Fabrication of a glucose microbiosensor with direct electrochemistry.
Main Results:
- Successful biofunctionalization of SWNTs with ssDNA, retaining SWNT properties.
- Demonstration of layer-by-layer self-assembly using ssDNA-SWNTs.
- Fabrication of a high-performance glucose microbiosensor with direct electrochemistry.
Conclusions:
- The ssDNA-SWNT system provides a versatile platform for layer-by-layer assembly.
- This approach enables the development of advanced biosensors and other nanotechnology applications.
- The method offers a promising route for integrating biological functionalities with nanomaterials.
