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Author(s): |
Qiang Li, China-Australia Joint Lab for Functional Nanomaterials and Department of Physics, Xiamen University, Xiamen,Fujian Province, 361005 ARC Centre of Excellence for Functional Nanomaterials, University of Queensland, St Lucia, Brisbane, Qld 4072, Australia
Lian-zhou Wang, China-Australia Joint Lab for Functional Nanomaterials and Department of Physics, Xiamen University, Xiamen,Fujian Province, 361005 ARC Centre of Excellence for Functional Nanomaterials, University of Queensland, St Lucia, Brisbane, Qld 4072, Australia
Gao-qing (max)lu, China-Australia Joint Lab for Functional Nanomaterials and Department of Physics, Xiamen University, Xiamen,Fujian Province, 361005
Rao Huang, China-Australia Joint Lab for Functional Nanomaterials and Department of Physics, Xiamen University, Xiamen,Fujian Province, 361005
Xian-fang Zhu, China-Australia Joint Lab for Functional Nanomaterials and Department of Physics, Xiamen University, Xiamen,Fujian Province, 361005 ARC Centre of Excellence for Functional Nanomaterials, University of Queensland, St Lucia, Brisbane, Qld 4072, Australia |
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Abstract: |
Localized surface plasmon resonance spectrum (LSPR) behaviors of PMMA /Ag core-shell nanoparticle had been extensively and systematically simulated by means of a calculation method based on Mie theory. Through the simulation calculation, the dependence of the LSPR behaviors of the core-shell nanoparticle on nanoparticle size, ratio of radius of the PMMA core to thickness of the Ag shell, and some other factors had been studied. Furthermore, LSPR behaviors of Ag nanoparticle had been simulated as well for comparison. The simulated results reveal that the nanosized PMMA dielectric core can weaken the retardation effects in the process of free electrons resonance in the Ag nanoshell. Thus, compared with the LSPR of the Ag nanoparticle, the position of the LSPR peak of the PMMA /Ag core-shell nanoparticle has an even more obvious red-shift and the width of the LSPR peak of the PMMA /Ag core-shell nanoparticles becomes even narrower. Such simulated results indicate that the core-shell nanoparticle would have more advantages over the Ag nanoparticle for potential applications of future chemical and biological nanosensors.
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