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Indexed by:期刊论文

Date of Publication:2014-11-11

Journal:LANGMUIR

Included Journals:SCIE、EI、PubMed、Scopus

Volume:30

Issue:44

Page Number:13491-13497

ISSN No.:0743-7463

Abstract:Gold nanostars coated with cysteine (Cys-AuNSs) were successfully synthesized and used in SERS-based copper ions (Cu2+) detection in aqueous media. The strong coordination ability of cysteine (Cys) with Cu2+ and the resulting Cys-AuNSs-Cu complex formation led to AuNSs aggregation and the drastic change in intensity and strength of COOH band spectra. The aggregation of AuNSs yielded distinct SERS signals, which exhibited remarkable sensitivity and selectivity for Cu2+ over other metal ions. Using this SERS-based sensing method, we have achieved a practical detection limit of 10 mu M. Such AuNSs-based detection could provide promising alternative choices for future SERS-active AuNSs application