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论文类型：期刊论文

发表时间：2014-11-11

发表刊物：LANGMUIR

收录刊物：SCIE、EI、PubMed、Scopus

卷号：30

期号：44

页面范围：13491-13497

ISSN号：0743-7463

摘要：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