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Noble metal clusters protected with mixed proteins exhibit intense photoluminescence

Title
Noble metal clusters protected with mixed proteins exhibit intense photoluminescence
Author
이해원
Keywords
FLUORESCENT GOLD NANOCLUSTERS; QUANTUM CLUSTERS; DIRECTED SYNTHESIS; CRYSTAL-STRUCTURE; AU-25 CLUSTERS; NANOPARTICLES; LUMINESCENT; TEMPLATES; AU; SEPARATION
Issue Date
2015-05
Publisher
ROYAL SOC CHEMISTRY
Citation
RSC ADVANCES, v. 5, NO 59, Page. 48039-48045
Abstract
In this paper is reported the synthesis and detailed mass spectrometric and spectroscopic characterization of highly luminescent Au and Ag clusters protected with mixed proteins. Taking advantage of the aggregation tendency of the protein, lysozyme (Lyz), an inter-protein conjugate was made from a physical mixture of two proteins, bovine serum albumin (BSA) and Lyz. Based on matrix-assisted laser desorption/ionization mass spectrometry data, the new cluster is assigned as similar to Au-36@BSA-Lyz. This specific system showed a very high red luminescence and the calculated quantum yield was 42% which is the highest to date for such cluster systems. A similar study on an Ag system showed the formation of similar to Ag-35@BSA-Lyz when a similar metal and protein concentration was used. By varying the concentration of the Ag precursor, different compositions of the cluster protected by the mixed protein were achieved. Such a system with a high quantum yield can be used for various applications such as sensors for ultralow levels of analytes, fluorescent tags and for tracking biomolecules in real systems.
URI
http://pubs.rsc.org/en/Content/ArticleLanding/2015/RA/C5RA06964E#!divAbstracthttp://hdl.handle.net/20.500.11754/24417
ISSN
2046-2069
DOI
10.1039/c5ra06964e
Appears in Collections:
COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > CHEMISTRY(화학과) > Articles
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