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Fabrication of Localized Surface Plasmon Resonance Fiber Probes Using Ionic Self-Assembled Gold Nanoparticles
Bioengineering and Bioinformatics Program, The Methodist Hospital Research Institute, Weill Cornell Medical College, Houston, Texas 77030, USA
College of Math and Physics, China University of Geoscience, Wuhan 430074, China
Department of Electrical & Computer Engineering, Texas A&M University, College Station, Texas 77844, USA
* Authors to whom correspondence should be addressed.
Received: 11 May 2010; in revised form: 8 June 2010 / Accepted: 21 June 2010 / Published: 1 July 2010
Abstract: An nm-thickness composite gold thin film consisting of gold nanoparticles and polyelectrolytes is fabricated through ionic self-assembled multilayers (ISAM) technique and is deposited on end-faces of optical fibers to construct localized surface plasmon resonance (LSPR) fiber probes. We demonstrate that the LSPR spectrum induced by ISAM gold films can be fine-tuned through the ISAM procedure. We investigate variations of reflection spectra of the probe with respect to the layer-by-layer adsorption of ISAMs onto end-faces of fibers, and study the spectral variation mechanism. Finally, we demonstrated using this fiber probe to detect the biotin-streptavidin bioconjugate pair. ISAM adsorbed on optical fibers potentially provides a simple, fast, robust, and low-cost, platform for LSPR biosensing applications.
Keywords: localized surface plasmon resonance; ionic self-assembled multilayers; fiber optics; biosensors
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MDPI and ACS Style
Wan, M.; Luo, P.; Jin, J.; Xing, J.; Wang, Z.; Wong, S.T.C. Fabrication of Localized Surface Plasmon Resonance Fiber Probes Using Ionic Self-Assembled Gold Nanoparticles. Sensors 2010, 10, 6477-6487.
Wan M, Luo P, Jin J, Xing J, Wang Z, Wong STC. Fabrication of Localized Surface Plasmon Resonance Fiber Probes Using Ionic Self-Assembled Gold Nanoparticles. Sensors. 2010; 10(7):6477-6487.
Wan, Miao; Luo, Pengfei; Jin, Jiayi; Xing, Jiong; Wang, Zhiyong; Wong, Stephen T. C. 2010. "Fabrication of Localized Surface Plasmon Resonance Fiber Probes Using Ionic Self-Assembled Gold Nanoparticles." Sensors 10, no. 7: 6477-6487.