Gold Nanorod@Chiral Mesoporous Silica Core-shell Nanoparticles with Unique Optical Properties

被引：185

作者：

Liu, Wenjing ^{[1
]}

Zhu, Zhening ^{[1
]}

Deng, Ke ^{[1
]}

Li, Zhengtao ^{[1
]}

Zhou, Yunlong ^{[1
]}

Qu, Huibin ^{[2
]}

Gao, Yan ^{[1
]}

Che, Shunai ^{[2
]}

Tang, Zhiyong ^{[1
]}

机构：

[1] Natl Ctr Nanosci & Technol, Lab Nanomat, Beijing 100190, Peoples R China

[2] Shanghai Jiao Tong Univ, Sch Chem & Chem Technol, State Key Lab Composite Mat, Shanghai 200240, Peoples R China

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2013年 / 135卷 / 26期

基金：

中国国家自然科学基金;

关键词：

ENHANCED RAMAN-SCATTERING; CIRCULAR-DICHROISM; NANOCRYSTALS; CYSTEINE; MOLECULES; AU; NANOMATERIALS; TRANSCRIPTION; RECOGNITION; ADSORPTION;

D O I：

10.1021/ja312327m

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The design and fabrication of chiral nanostructures is a promising approach to realize enantiomeric recognition and separation. In our work, gold nanorod@chiral mesoporous silica core-shell nanoparticles (GNR@CMS NPs) have been successfully synthesized. This novel material exhibits strong and tunable circular dichroism signals in the visible and near-infrared regions due to the optical coupling between the CMS shells and the GNR cores. When chiral cysteine molecules are loaded in the porous shells, the corresponding surface enhanced Raman scattering spectroscopy demonstrates a distinct chiral recognition effect, which can be used to semiquantitatively measure the composition of chiral enantiomers. A detailed sensing mechanism has been disclosed by density functional theory calculations.

引用

页码：9659 / 9664

页数：6

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