金纳米颗粒在肽纳米管上的表面等离子体耦合圆二色性。

Surface plasmon coupled circular dichroism of Au nanoparticles on peptide nanotubes.

机构信息

Photosciences and Photonics Section, National Institute for Interdisciplinary Science and Technology, CSIR, Trivandrum, 695 019, India.

出版信息

J Am Chem Soc. 2010 Mar 3;132(8):2502-3. doi: 10.1021/ja908574j.

DOI:10.1021/ja908574j

PMID:20136136

Abstract

Au nanoparticles grown on D- and L-isomers of diphenylalanine peptide nanotubes showed a bisignated CD signal at their surface plasmon frequency with positive and negative couplets, respectively. The surface plasmon coupled CD signal in these hybrid systems originates from the asymmetric organization of Au nanoparticles on peptide nanotubes. Mirror image relationship in the CD spectra clearly indicates that the chiral molecules on the nanotubes drive the organization of nanoparticles in two different ways.

摘要

在 D-和 L-苯丙氨酸二肽纳米管上生长的金纳米粒子在其表面等离子体频率处表现出双信号的 CD 信号，分别为正偶和负偶。这些杂化体系中的表面等离子体耦合 CD 信号源于金纳米粒子在肽纳米管上的不对称排列。CD 光谱中的镜像关系清楚地表明，纳米管上的手性分子以两种不同的方式驱动纳米粒子的排列。