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Proceedings Paper

Fabrication of a label-free plasmon immunosensor based on triangular silver nanoplates
Author(s): Peipei Dong; Yuanyuan Lin; Junwei Di
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Paper Abstract

In this work, we have firstly electrodeposited small gold seeds (average diameter of ~40 nm) onto transparent indium tin oxide (ITO) thin film coated glass. Then silver triangular nanoplates with edge lengths of ~200 nm were fabricated using seed-mediated growth method. The localized surface plasmon resonance (LSPR) peak was located at ~700 nm. Finally, a label-free plasmon immunosensor was prepared by directly immobilizing goat anti-mouse IgG onto silver surface. The performance of the LSPR immunosensor was investigated. The red-shift of the biosensor was linearly proportional to mouse IgG concentration ranged from 5 ng/mL to 500 ng/mL, with a detection limit of 2 ng/mL. The label-free immunosensor was simple, sensitive and selective.

Paper Details

Date Published: 9 August 2013
PDF: 7 pages
Proc. SPIE 8793, Fourth International Conference on Smart Materials and Nanotechnology in Engineering, 87930P (9 August 2013); doi: 10.1117/12.2031438
Show Author Affiliations
Peipei Dong, Soochow Univ. (China)
Yuanyuan Lin, Soochow Univ. (China)
Junwei Di, Soochow Univ. (China)


Published in SPIE Proceedings Vol. 8793:
Fourth International Conference on Smart Materials and Nanotechnology in Engineering
Jayantha A. Epaarachchi; Alan Kin-tak Lau; Jinsong Leng, Editor(s)

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