Ethanol-induced formation of silver nanoparticle aggregates for highly active SERS substrates and application in DNA detection

doi:10.1021/jp075550z

IMR OpenIR

	Ethanol-induced formation of silver nanoparticle aggregates for highly active SERS substrates and application in DNA detection
	Sun, Lanlan; Song, Yonghai; Wang, Li; Guo, Cunlan; Sun, Yujing; Liu, Zhelin; Li, Zhuang
通讯作者	Li, Zhuang(zli@ciac.jl.cn)
	2008-02-07
发表期刊	JOURNAL OF PHYSICAL CHEMISTRY C
ISSN	1932-7447
卷号	112 期号:5 页码:1415-1422
摘要	A controllable silver nanoparticle aggregate system has been synthesized by adding different amounts of ethanol to cetyltrimethylammonium bromide (CTAB) capped silver nanoparticles (Ag-nps), which could be used as highly efficient surface-enhanced Raman scattering (SERS) active substrates. This ethanol-induced aggregation can be attributed to preferential dissolution of CTAB into ethanol, which leads a partial removal of the protective CTAB layer on Ag-nps. The optical and morphological properties of these aggregates under various volumes of ethanol were explored via UV-vis spectroscopy and atomic force microscopy. Two common probe molecules, Rhodamine 6G (R6G) and 4-aminothiophenol (4-ATP) were used for testing the SERS activity on these substrates at very low concentrations. It was found that the SERS enhancement ability is dependent on the ethanol volume used. The SERS enhancement factors of 4-ATP were estimated to be as large as 8.1 x 10(8) for b(2) vibration modes and 6.8 x 10(6) for a(1) vibration modes. Good stability of the substrates was demonstrated by measuring the Raman activity with time. The optimized SERS-active substrate with the largest enhancement ability shown in this study could be used to detect double-strand DNA. The great advantage for this SERS-based DNA detection is that a dye label is not needed. It showed the potential of this Ag-nps aggregate system as a convenient and powerful SERS-active substrate for DNA detection.
DOI	10.1021/jp075550z
收录类别	SCI
语种	英语
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science
WOS类目	Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS记录号	WOS:000252814800019
出版者	AMER CHEMICAL SOC
引用统计	被引频次：152[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/92527
专题	中国科学院金属研究所
通讯作者	Li, Zhuang
作者单位	Chinese Acad Sci, State Key Lab Electroanalyt Chem, Changchun Inst Appl Chem, Grad Sch Chinese Acad Sci, Changchun 130022, Peoples R China
推荐引用方式 GB/T 7714	Sun, Lanlan,Song, Yonghai,Wang, Li,et al. Ethanol-induced formation of silver nanoparticle aggregates for highly active SERS substrates and application in DNA detection[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2008,112(5):1415-1422.
APA	Sun, Lanlan.,Song, Yonghai.,Wang, Li.,Guo, Cunlan.,Sun, Yujing.,...&Li, Zhuang.(2008).Ethanol-induced formation of silver nanoparticle aggregates for highly active SERS substrates and application in DNA detection.JOURNAL OF PHYSICAL CHEMISTRY C,112(5),1415-1422.
MLA	Sun, Lanlan,et al."Ethanol-induced formation of silver nanoparticle aggregates for highly active SERS substrates and application in DNA detection".JOURNAL OF PHYSICAL CHEMISTRY C 112.5(2008):1415-1422.