A versatile synthesis route for metal@SiO2 core-shell nanoparticles using 11-mercaptoundecanoic acid as primer

	A versatile synthesis route for metal@SiO2 core-shell nanoparticles using 11-mercaptoundecanoic acid as primer
	Zhang Y.; Kong X.; Xue B.; Zeng Q.; Liu X.; Tu L.; Liu K.; Zhang H.
	2013
发表期刊	Journal of Materials Chemistry C
ISSN	ISBN/20507534
卷号	1 期号:39
摘要	Applying the Stober method to directly coat noble metal nanoparticles (NPs) such as gold (Au) and silver (Ag) NPs with silica shells presents challenges, since the noble metal NPs are not stable in alcoholic solution and have low chemical affinity for silica. This paper describes a method which uses 11-mercaptoundecanoic acid (MUA) as a linker molecule between the silica shell and the noble metal NPs. MUA binds strongly to the surface of the NPs via a metal-S bond by replacing the standard capping agents on the surface of the NPs. Upon MUA stabilization, the NPs can be transferred into alcohol solution and show chemical affinity for silica. The MUA-modified NPs can be directly coated with thickness controlled, smooth and homogeneous silica shells via the standard Stober method by varying the amount of tetraethoxysilane (TEOS). Compared with methods reported in the literature for the coating of such particles, this method can not only be used to successfully coat citrated-stabilized Au or Ag NPs, but can also be extended to encapsulate oleylamine (OA)-stabilized Au NPs and cetyltrimethylammonium bromide (CTAB)-stabilized Au nanorods (NRs) by using MUA to displace the original ligand on the surface of the NPs. Additionally, the obtained metal@SiO2 core-shell NPs have been successfully applied as plasmonic nanoantennas for fluorescence enhancement in metal@SiO 2@fluorophore NPs. 2013 The Royal Society of Chemistry.
收录类别	SCI ; EI
语种	中文
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/40927
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Zhang Y.,Kong X.,Xue B.,et al. A versatile synthesis route for metal@SiO2 core-shell nanoparticles using 11-mercaptoundecanoic acid as primer[J]. Journal of Materials Chemistry C,2013,1(39).
APA	Zhang Y..,Kong X..,Xue B..,Zeng Q..,Liu X..,...&Zhang H..(2013).A versatile synthesis route for metal@SiO2 core-shell nanoparticles using 11-mercaptoundecanoic acid as primer.Journal of Materials Chemistry C,1(39).
MLA	Zhang Y.,et al."A versatile synthesis route for metal@SiO2 core-shell nanoparticles using 11-mercaptoundecanoic acid as primer".Journal of Materials Chemistry C 1.39(2013).

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