王乔

个人信息Personal Information

副教授

博士生导师

硕士生导师

性别:女

毕业院校:大连理工大学

学位:博士

所在单位:物理学院

学科:光学

办公地点:物理学院331室

联系方式:wangqiao@dlut.edu.cn

电子邮箱:wangqiao@dlut.edu.cn

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Silver-decorated ZnO hexagonal nanoplate arrays as SERS-active substrates: An experimental and simulation study

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论文类型:期刊论文

发表时间:2013-12-28

发表刊物:JOURNAL OF MATERIALS RESEARCH

收录刊物:SCIE、Scopus

卷号:28

期号:24

页面范围:3374-3383

ISSN号:0884-2914

摘要:We have fabricated Ag-decorated ZnO nanoplate arrays by combining water-bath heating toward ZnO hexagonal nanoplate arrays and subsequent decoration of Ag films or nanoparticles on the ZnO surfaces by magnetron sputtering or photoreduction. Experimental surface-enhanced Raman scattering (SERS) results show that Ag-film-ZnO hybrid substrates with different Ag sputtering times exhibit a large difference in enhanced SERS signals for Rhodamine 6G (10(-7) M). Atomic force microscope analysis reveals that two kinds of positions create abundant "hot spots" in this SERS substrate: one is located at the gap between adjacent separate Ag-film-ZnO hybrid nanoplates, and the other is located at the V-grooves formed by two adjacent interlaced Ag-film-ZnO hybrid nanoplates. The effects of simultaneous changes in interplate spacing and groove wall angle are considered to be the key factors affecting the SERS of our prepared Ag-film-ZnO hybrid substrates, which have also been evaluated by finite-difference time-domain simulation.