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http://dx.doi.org/10.5012/bkcs.2014.35.1.25

Fabrication of Chitosan-gold Nanocomposites Combined with Optical Fiber as SERS Substrates to Detect Dopamine Molecules  

Lim, Jae-Wook (Department of Chemical & Bio Engineering, Gachon University)
Kang, Ik-Joong (Department of Chemical & Bio Engineering, Gachon University)
Publication Information
Bulletin of the Korean Chemical Society / v.35, no.1, 2014 , pp. 25-29 More about this Journal
Abstract
This research was aimed to fabricate an optical fiber-based SERS substrate which can detect dopamine neurotransmitters. Chitosan nanoparticles (NPs) were firstly anchored on the surface of optical fiber, and then gold layer was subsequently deposited on the anchored chitosan NPs via electroless plating method. Finally, chitosan-gold nanocomposites combined with optical fiber reacted with dopamine molecules of 100-1500 mg/day which is a standard daily dose for Parkinson's disease patients. The amplified Raman signal at $1348cm^{-1}$ obtained from optical fiber-based SERS substrate was plotted versus dopamine concentrations (1-10 mM), demonstrating an approximate linearity of Y = 303.03X + 2385.8 ($R^2$ = 0.97) with narrow margin errors. The optical fiber-based Raman system can be potentially applicable to in-vitro (or in-vivo) detection of probe molecules.
Keywords
Optical fiber; SERS; Chitosan-gold nanocomposites; Dopamine;
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