Author： Chen I-Cherng Lin Shiu-Shiung Lin Tsao-Jen Du Je-Kang
Publisher： MDPI
E-ISSN： 1424-8220|11|2|1907-1923
ISSN： 1424-8220
Source： Sensors, Vol.11, Iss.2, 2011-02, pp. : 1907-1923
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Abstract
A novel fiber-optic probe based on reflection-based localized surface plasmon resonance (LSPR) was developed to quantify the concentration of hydrofluoric acid (HF) in aqueous solutions. The LSPR sensor was constructed with a gold nanoparticle-modified PMMA fiber, integrated with a SiO2 sol-gel coating. This fiber-sensor was utilized to assess the relationship between HF concentration and SiO2 sol-gel layer etching reduction. The results demonstrated the LSPR sensor was capable of detecting HF-related erosion of hydrofluoric acid solutions of concentrations ranging from 1% to 5% using Relative RI Change Rates. The development of the LSPR sensor constitutes the basis of a detector with significant sensitivity for practical use in monitoring HF solution concentrations.
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