Nano Archive

Flexible and disposable immunosensors based on layer-by-layer self-assembled carbon nanotubes and biomolecules

Lu, Miao and Lee, Dongjin and Xue, Wei and Cui, Tianhong (2009) Flexible and disposable immunosensors based on layer-by-layer self-assembled carbon nanotubes and biomolecules. Sensors and Actuators A: Physical, 150 (2). 280 - 285.

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Official URL: http://www.sciencedirect.com/science/article/B6THG...

Abstract

A low-cost, flexible, and disposable immunosensor is presented in this paper. The single-walled carbon nanotubes (SWNTs) and biomolecules are self-assembled between two micro-patterned electrodes. The immuno-chip acts as a platform of a horseradish peroxidase (HRP) labeled sandwiched Enzyme-Linked ImmunoSorbent Assay (ELISA). The pH change induced by the biochemical reactions influences the electrical conductance of SWNT. A detection resolution of 0.4 ng/ml (2.5 pM) for normal rabbit immunoglobulin G (IgG) is demonstrated. The new fabrication technique and the HRP labeled detection protocol can be extended to the recognition of other antigens for critical applications to clinical diagnosis, food toxin detection, and environment monitoring.

Item Type:Article
Uncontrolled Keywords:Single-walled carbon nanotube (SWNT); Layer-by-layer (LbL) self-assembly; Immunosensor; MEMS
Subjects:Material Science > Nanofabrication processes and tools
Analytical Science > Nanotechnology for sensing and actuating
Biomedical Science > Nanoscale biological processes
Biomedical Science > Nanomedicine
Engineering > Nanotechnology applications in ICT
ID Code:4970
Deposited By:SPI
Deposited On:09 Apr 2009 11:41
Last Modified:09 Apr 2009 11:41

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