We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Interband Absorption Enhanced Optical Activity in Discrete Au@Ag Core-Shell Nanocuboids: Probing Extended Helical Conformation of Chemisorbed Cysteine Molecules.
- Authors
Bao, Zhi Yong; Zhang, Wei; Zhang, Yong-Liang; He, Jijun; Dai, Jiyan; Yeung, Chi-Tung; Law, Ga-Lai; Lei, Dang Yuan
- 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.
- Subjects
ABSORPTION; CYSTEINE; METALLIC surfaces; CIRCULAR dichroism; ULTRAVIOLET radiation; BIOMOLECULES
- Publication
Angewandte Chemie International Edition, 2017, Vol 56, Issue 5, p1283
- ISSN
1433-7851
- Publication type
Article
- DOI
10.1002/anie.201607563