Polydopamine-Assisted Fabrication of Stable Silver Nanoparticles on Optical Fiber for Enhanced Plasmonic Sensing
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We present a facile and effective method for fabrication of the localized surface plasmon resonance (LSPR) optical fiber sensor assisted by two polydopamine (PDA) layers with enhanced plasmonic sensing performance. The first PDA layer was self-polymerized onto the bare optical fiber to provide the catechol groups for the reduction from Ag+ to Ago through chelating and redox activity. As the reduction of Ag+ proceeds, Ag nanoparticles (NPs) were grown in-situ on the PDA layer with uniform distribution. The second PDA layer was applied to prevent Ag NPs from oxidating and achieve an improvement of LSPR signal. The PDA/Ag/PDA-based optical fiber sensor has an enhanced LSPR sensitivity of 961 nm/RIU and excellent oxidation resistance. The stable PDA/Ag/PDA-based LSPR sensor with high optical performance is very promising for future application in optical sensing field.
KeywordsLSPR optical fiber polydopamine in-situ growth silver nanoparticles
This work was supported by the National Natural Science Foundation of China (Grant No. 51473115), Tianjin Municipal Science and Technology Bureau, China (Grant Nos. 18YFZCSF00590 and 18YFHBZC00010), and Wuqing S&T Commission (Grant Nos. WQKJ201726 and WQKJ201806).
- M. D. Malinsky, K. L. Kelly, G. C. Schatz, and R. P. Van Duyne, “Chain length dependence and sensing capabilities of the localized surface plasmon resonance of silver nanoparticles chemically modified with alkanethiol self-assembled monolayers,” Journal of the American Chemical Society, 2001, 123(7): 1471–1482.CrossRefGoogle Scholar
- K. Jia, M. Y. Khaywah, Y. Li, J. L. Bijeon, P. M. Adam, R. Déurche, et al., “Strong improvements of localized surface plasmon resonance sensitivity by using Au/Ag bimetallic nanostructures modified with polydopamine films,” ACS Applied Materials & Interfaces, 2014, 6(1): 219–227.CrossRefGoogle Scholar
- E. D. Palik and G. Ghosh, Handbook of optical constants of solids. San Diego, United States: Academic Press, 1998.Google Scholar
- J. G. Ortega-Mendoza, A. Padilla-Vivanco, C. Toxqui-Quitl, N. P. Zaca-Morã, N. D. Villegas-Hernã, and V. F. Chã, “Optical fiber sensor based on localized surface plasmon resonance using silver nanoparticles photodeposited on the optical fiber end,” Sensors, 2014, 14(10): 18701–18710.CrossRefGoogle Scholar
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