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

CORC > 青岛生物能源与过程研究所 > 中国科学院青岛生物能源与过程研究所 > 生物传感技术团队

	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
刊名	CHEMPHYSCHEM
	2011-08-01
卷号	12 期号:11 页码:2118-2123
关键词	nanoparticles Raman spectroscopy silver size effects structural evolution
英文摘要	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.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Chemistry, Physical ; Physics, Atomic, Molecular & Chemical
研究领域[WOS]	Chemistry ; Physics
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记录号	WOS:000293385400011
公开日期	2015-12-24
内容类型	期刊论文
源URL	[http://ir.qibebt.ac.cn/handle/337004/6749]
专题	青岛生物能源与过程研究所_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
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.