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Dealloying Ag-Al Alloy to Prepare Nanoporous Silver as a Substrate for Surface-Enhanced Raman Scattering: Effects of Structural Evolution and Surface Modification
Qiu, Huajun1,2; Zhang, Zhonghua3; Huang, Xirong1; Qu, Yinbo4
2011-08-01
发表期刊CHEMPHYSCHEM
卷号12期号:11页码:2118-2123
摘要Sensitive detection of molecules by using the surface-enhanced Raman scattering (SERS) technique depends on the nanostructured metallic substrate and many efforts have been devoted to the preparation of SERS substrates with high sensitivity, stability, and reproducibility. Herein, we report on the fabrication of stable monolithic nanoporous silver (NPS) by chemical dealloying of Ag-Al precursor alloys with an emphasis on the effect of structural evolution on SERS signals. It was found that the dealloying conditions had great influence on the morphology (the ligament/pore size) and the crystallization status, which determined the SERS signal of rhodamine 6G on the NPS. NPS with small pores, low residual Al, and perfect crystallization gave high SERS signals. A high enhancement factor of 7.5 x 10(5) was observed on bare NPS obtained by dealloying Ag(30)Al(70) in 2.5 wt% HCl at room temperature followed by 15 min aging at around 85 degrees C. After coating Ag nanoparticles on the NPS surface, the enhancement factor increased to 1.6 x 10(8) owing to strong near-field coupling between the ligaments and nanoparticles.
文章类型Article
关键词Nanoparticles Raman Spectroscopy Silver Size Effects Structural Evolution
WOS标题词Science & Technology ; Physical Sciences
DOI10.1002/cphc.201100205
关键词[WOS]GOLD NANOPARTICLE ARRAYS ; SPECTROSCOPY ; FILMS ; AU ; NANOSTRUCTURES ; COPPER ; SIZE ; MICROSTRUCTURE ; FABRICATION ; DEPOSITION
收录类别SCI
语种英语
WOS研究方向Chemistry ; Physics
WOS类目Chemistry, Physical ; Physics, Atomic, Molecular & Chemical
WOS记录号WOS:000293385400011
引用统计
文献类型期刊论文
条目标识符http://ir.qibebt.ac.cn/handle/337004/6749
专题生物传感技术团队
作者单位1.Shandong Univ, Minist Educ China, Key Lab Colloid & Interface Chem, Jinan 250100, Peoples R China
2.Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Qingdao 266101, Peoples R China
3.Shandong Univ, Key Lab Liquid Struct & Hered Mat, Jinan 250100, Peoples R China
4.Shandong Univ, State Key Lab Microbial Technol China, Jinan 250100, Peoples R China
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GB/T 7714
Qiu, Huajun,Zhang, Zhonghua,Huang, Xirong,et al. Dealloying Ag-Al Alloy to Prepare Nanoporous Silver as a Substrate for Surface-Enhanced Raman Scattering: Effects of Structural Evolution and Surface Modification[J]. CHEMPHYSCHEM,2011,12(11):2118-2123.
APA Qiu, Huajun,Zhang, Zhonghua,Huang, Xirong,&Qu, Yinbo.(2011).Dealloying Ag-Al Alloy to Prepare Nanoporous Silver as a Substrate for Surface-Enhanced Raman Scattering: Effects of Structural Evolution and Surface Modification.CHEMPHYSCHEM,12(11),2118-2123.
MLA Qiu, Huajun,et al."Dealloying Ag-Al Alloy to Prepare Nanoporous Silver as a Substrate for Surface-Enhanced Raman Scattering: Effects of Structural Evolution and Surface Modification".CHEMPHYSCHEM 12.11(2011):2118-2123.
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