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题名: Agx@WO3 core-shell nanostructure for LSP enhanced chemical sensors
作者: Xu, Lijie1;  Yin, Ming-Li1, 3;  Liu, Shengzhong (Frank)1, 2
刊名: SCIENTIFIC REPORTS
发表日期: 2014-10-23
DOI: 10.1038/srep06745
卷: 4
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology
类目[WOS]: Multidisciplinary Sciences
研究领域[WOS]: Science & Technology - Other Topics
英文摘要: 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 of core-shell nanostructure in which the shell is made of a 2D material for effective plasmonic propagation. We have designed a much enhanced chemical sensor made of plasmonic Ag-x@(2D-WO3) that combines above advantages. Specifically, the sensor response increases from 38 for Ag-x-WO3 mixture to 217 for the Ag-x@(2D-WO3) core-shell structure; response and recovery time are shortened considerably to 2 and 5 seconds; and optimum sensor working temperature is lowered from 370 degrees C to 340 degrees C. Light irradiation is found to increase the Ag-x@(2D-WO3) sensor response, particularly at blue wavelength where it resonates with the absorption of Ag nanoparticles. Raman scattering shows significantly enhanced intensity for both the 2D-WO3 shell and surface adsorbates. Both the resonance sensor enhancement and the Raman suggest that the improved sensor performance is due to nanoplasmonic mechanism. It is demonstrated that (1) 2D material can be used as the shell component of a core-shell nanostructure, and (2) surface plasmon can effectively boost sensor performance.
关键词[WOS]: GRAPHENE OXIDE ;  SILVER ;  RAMAN ;  NANOPARTICLES ;  NANOSHEETS ;  CLUSTERS ;  DEVICE
语种: 英语
WOS记录号: WOS:000343598300001
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/145652
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Shaanxi Normal Univ, Sch Mat Sci & Engn, Key Lab Appl Surface & Colloid Chem, Chinese Natl Minist Educ, Xian 710062, Peoples R China
2.Dalian Inst Chem Phys, Natl Lab Clean Energy, Dalian 116023, Peoples R China
3.Xian Technol Univ, Sch Sci, Xian 710032, Peoples R China

Recommended Citation:
Xu, Lijie,Yin, Ming-Li,Liu, Shengzhong . Agx@WO3 core-shell nanostructure for LSP enhanced chemical sensors[J]. SCIENTIFIC REPORTS,2014,4.
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