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论文类型：期刊论文

发表时间：2017-07-21

发表刊物：ANALYTICAL METHODS

收录刊物：Scopus、SCIE、EI

卷号：9

期号：27

页面范围：4028-4032

ISSN号：1759-9660

摘要：Bimetal nanoclusters (BNCs) have attracted great attention due to their cooperative electronic, optical, and catalytic properties. In this study, the highly luminescent Cu/Ag BNCs were prepared based on the weakly luminescent glutathione (GSH)-capped Cu NCs for the first time. After the introduction of a certain amount of Ag+, a 9-fold enhancement of the luminescence intensity was obtained from GSH-protected Cu/Ag BNCs. The luminescence emission peak was blue shifted from 620 nm (red emission) to 604 nm (orange-yellow emission). The Cu/Ag BNCs exhibited an average size of around 1.4 + 0.2 nm, as observed from a thorough analysis of transmission electron microscopy data. The as-prepared Cu/Ag BNCs exhibited excellent anti-interference performance against various metal ions. In addition to the intrinsic optical properties, the Cu/Ag BNCs were employed as a temperature sensor by virtue of the luminescence intensity of Cu/Ag BNCs responding sensitively to temperature fluctuating in the range of 4-55 degrees C.