Agx@WO3 core-shell nanostructure for LSP enhanced chemical sensors

作者: Lijie Xu , Ming-Li Yin , Shengzhong (Frank) Liu

DOI: 10.1038/SREP06745

关键词: Absorption (electromagnetic radiation)Materials scienceGrapheneOptoelectronicsBioinformaticsRaman scatteringPlasmonSurface plasmonNanoparticleRaman spectroscopyNanostructure

摘要: Exceptional properties of graphene have triggered intensive research on other 2D materials. Surface plasmon is another subject being actively explored for many applications. Herein we report a new class core-shell nanostructure in which the shell made material effective plasmonic propagation. We designed much enhanced chemical sensor Agx@(2D-WO3) that combines above advantages. Specifically, response increases from 38 Agx-WO3 mixture to 217 structure; and recovery time are shortened considerably 2 5 seconds; optimum working temperature lowered 370°C 340°C. Light irradiation found increase response, particularly at blue wavelength where it resonates with absorption Ag nanoparticles. Raman scattering shows significantly intensity both 2D-WO3 surface adsorbates. Both resonance enhancement suggest improved performance due nanoplasmonic mechanism. It demonstrated (1) can be used as component nanostructure, (2) effectively boost performance.

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