Title :
Optical biosensor based on colloidal gold-modified long-period fiber grating
Author :
Guo, Ken-Ming ; Cheng, Shu-Fang ; Lai-Kwan Chau ; Tang, Jaw-Luen
Author_Institution :
Dept. of Phys., Nat. Chung Cheg Univ., Chiayi, Taiwan
Abstract :
A novel class of fiber-optic biosensor that exploits the localized surface plasmon resonance of self-assembled gold colloids on the grating portion of a long-period fiber grating is proposed. When the gold colloidal surface was modified with DNP, experimental results show that the signal increases linearly with increasing concentration of the analyte, and the detection limit of the sensor for antiDNP is 3.80×10-7 M.
Keywords :
biosensors; colloids; diffraction gratings; fibre optic sensors; gold; organic compounds; self-assembly; surface plasmon resonance; Au; DNP; antiDNP; fiber-optic biosensor; localized surface plasmon resonance; long-period fiber grating; self-assembled gold colloids; Biomedical optical imaging; Biosensors; Fiber gratings; Gold; Optical fiber sensors; Optical fibers; Optical refraction; Optical sensors; Optical surface waves; Optical variables control;
Conference_Titel :
Biophotonics, 2004. APBP 2004. The Second Asian and Pacific Rim Symposium on
Print_ISBN :
0-7803-8676-0
DOI :
10.1109/APBP.2004.1412354
