Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/65830
Title: Interband absorption enhanced optical activity in discrete au@ag core–shell nanocuboids : probing extended helical conformation of chemisorbed cysteine molecules
Authors: Bao, ZY
Zhang, W
Zhang, YL
He, J
Dai, J
Yeung, CT
Law, GL
Lei, DY
Keywords: Circular dichroism
Interband transition
Metal nanostructures
Optical activity
Structural conformation
Issue Date: 2017
Publisher: Wiley-VCH
Source: Angewandte chemie international edition, 2017, v. 56, no. 5, p. 1283-1288 How to cite?
Journal: Angewandte chemie international edition 
Abstract: Detailed understanding of the interaction between a chiral molecule and a noble metal surface is essential to rationalize and advance interfacial self-assembly of amino acids and metal-mediated anchoring of proteins. Here we demonstrate that individual Au@Ag core–shell nanocuboids can serve as a plasmonic reporter of an extended helical network formed among chemisorbed cysteine molecules, through generating an interband absorption enhanced, Ag-surface-exclusive circular dichroism (CD) band in the UV region. The observed unusual, strong CD response in the hybrid Au@Ag–cysteine system can be used to probe in real time conformational evolution and structural rearrangement of biomolecules in general and also monitor the interfacial interaction between a metal surface and an adsorbed molecule, opening up the possibility of using Ag nanostructures as promising stereochemically attuned nanosensors.
URI: http://hdl.handle.net/10397/65830
ISSN: 1433-7851
EISSN: 1521-3773
DOI: 10.1002/anie.201607563
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