Dealloying Ag-Al Alloy to Prepare Nanoporous Silver as a Substrate for Surface-Enhanced Raman Scattering: Effects of Structural Evolution and Surface Modification

doi:10.1002/cphc.201100205

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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, Huajun 1,2; Zhang, Zhonghua 3; Huang, Xirong 1; Qu, Yinbo 4
	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
DOI	10.1002/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（过去）
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
推荐引用方式 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.