Carbon nanotube-assisted enhancement of surface plasmon resonance signal

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Carbon nanotube-assisted enhancement of surface plasmon resonance signal
Eun Gyo Lee; Kyung Mi Park; Jin Young Jeong; S H Lee; J E Baek; Hong-Weon Lee; Joon Ki Jung; Bong Hyun Chung
Bibliographic Citation
Analytical Biochemistry, vol. 408, no. 2, pp. 206-211
Publication Year
We describe a method of amplifying the biosensing signal in surface plasmon resonance (SPR)-based immunoassays using an antibody-carbon nanotube (CNT) conjugate. As a model system, human erythropoietin (EPO) and human granulocyte macrophage colony-stimulating factor (GM-CSF) were detected by sandwich-type immunoassays using an SPR biosensor. For the amplification of the SPR signal, the CNT was conjugated with a polyclonal antibody, and then the conjugates were reacted with antibodies coupled with the target proteins. This amplification strategy increases the dynamic range of the immunoassays and enhances the detection sensitivity. The SPR immunoassays, combined with the CNT-assisted signal amplification method, provided a wide dynamic range over four orders of magnitude for both EPO and GM-CSF (0.1-1000. ng/ml). The CNT amplification method is expected to realize the detection of picogram levels and a wide dynamic detection range of multiple proteins, enabling it to offer a robust analysis tool for the development of biopharmaceutical production.
Carbon nanotubeErythropoietinGranulocyte macrophage colony-stimulating factorSurface plasmon resonance
Appears in Collections:
Division of Bio Technology Innovation > BioProcess Engineering Center > 1. Journal Articles
Division of Research on National Challenges > Environmental diseases research center > 1. Journal Articles
Division of Bio Technology Innovation > 1. Journal Articles
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