Exploration of the growth process of ultrathin silica shells on the surface of gold nanorods by the localized surface plasmon resonance

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	Exploration of the growth process of ultrathin silica shells on the surface of gold nanorods by the localized surface plasmon resonance
	Li, Chong ; Li, Yujie ; Ling, Yunyang ; Lai, Yangwei ; Wu, Chuanliu ; Zhao, Yibing ; Wu CL(吴川六) ; Zhao YB(赵一兵)
刊名	http://dx.doi.org/10.1088/0957-4484/25/4/045704
	2014-01-31
关键词	QUANTUM DOTS METAL NANOPARTICLES ELECTRON-MICROSCOPY OPTICAL-PROPERTIES REFRACTIVE-INDEX SPECTROSCOPY SENSITIVITY CELLS FLUORESCENCE DEPENDENCE
英文摘要	National Natural Science Foundation of China [21075101]; National Basic Research Program of China [2011CB910403]; Planned Science and Technology Project of Xiamen, China [3502z20113006]; Specialized Research Fund for the Doctoral Program of Higher Education of China [200803840007]; NFFTBS [J1310024]; Ultrathin silica coating (UTSC) has emerged as an effective way to improve the compatibility and stability of nanoparticles without attenuating their intrinsic optical properties. Exploration strategies to probe the growth process of ultrathin silica shells on the surface of nanoparticles would represent a valuable innovation that would benefit the development of ultrathin silica coated nanoparticles and their relevant applications. In this work, we report a unique, very effective and straightforward strategy for probing the growth of ultrathin silica shells on the surface of gold nanorods (Au NRs), which exploits the localized surface plasmon resonance (LSPR) as a reporting signal. The thickness of the ultrathin silica shells on the surface of Au NRs can be quantitatively measured and predicted in the range of 0.5-3.5 nm. It is demonstrated that the LSPR shift accurately reflects the real-time change in the thickness of the ultrathin silica shells on Au NRs during the growth process. By using the developed strategy, we further analyze the growth of UTSC on the surface of Au NRs via feeding of Na2SiO3 in a stepwise manner. The responsiveness analysis of LSPR also provides important insight into the shielding effect of UTSC on the surface of Au NRs that is not accessible with conventional strategies. This LSPR-based strategy permits exploration of the surface-mediated sol-gel reactions of silica from a new point of view.
语种	英语
出版者	IOP PUBLISHING LTD
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/89410]
专题	化学化工－已发表论文
推荐引用方式 GB/T 7714	Li, Chong,Li, Yujie,Ling, Yunyang,et al. Exploration of the growth process of ultrathin silica shells on the surface of gold nanorods by the localized surface plasmon resonance[J]. http://dx.doi.org/10.1088/0957-4484/25/4/045704,2014.
APA	Li, Chong.,Li, Yujie.,Ling, Yunyang.,Lai, Yangwei.,Wu, Chuanliu.,...&赵一兵.(2014).Exploration of the growth process of ultrathin silica shells on the surface of gold nanorods by the localized surface plasmon resonance.http://dx.doi.org/10.1088/0957-4484/25/4/045704.
MLA	Li, Chong,et al."Exploration of the growth process of ultrathin silica shells on the surface of gold nanorods by the localized surface plasmon resonance".http://dx.doi.org/10.1088/0957-4484/25/4/045704 (2014).