Photonic Crystal Fibre SERS Sensors Based on Silver Nanoparticle Colloid |
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Authors: | XIE Zhi-Guo LU Yong-Hua WANG Pei LIN Kai-Qun YAN Jie MING Hai |
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Institution: | Anhui Key Laboratory of Optoelectronic Science and Technology, Department of Physics, University of Science and Technology of China, Hefei 230026 |
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Abstract: | A photonic crystal fibre (PCF) surface enhanced Raman scattering (SERS) sensor is developed based on silver nanoparticle colloid. Analyte solution and silver nanoparticles are injected into the air holes of PCF by a simple modified syringe to overcome mass-transport constraints, allowing more silver nanoparticles involved in SERS activity. This sensor offers significant benefit over the conventional SERS sensor with high flexibility, easy manufacture. We demonstrate the detection of 4-mercaptobenzoic acid (4-MBA) molecules with the injecting way and the common dipping measurement. The injecting way shows obviously better results than the dipping one. Theoretical analysis indicates that this PCF SERS substrate offers enhancement of about 7 orders of magnitude in SERS active area. |
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Keywords: | 82 80 -d 07 07 Df 42 81 -i |
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