☆ 4.7 Article

Near infrared Ag/Au alloy nanoclusters: Tunable photoluminescence and cellular imaging

JOURNAL OF COLLOID AND INTERFACE SCIENCE (2014)

期刊

JOURNAL OF COLLOID AND INTERFACE SCIENCE

卷 416, 期 -, 页码 274-279

出版社

ACADEMIC PRESS INC ELSEVIER SCIENCE

DOI: 10.1016/j.jcis.2013.11.011

关键词

Near infrared nanomaterials; Alloy nanoclusters; Ag/Au; Tunable photoluminescence; Cellular imaging

类别

Chemistry, Physical

资金

National Natural Science Foundation of China [21174048, 51373061]
Programme of Introducing Talents of Discipline to Universities (111 Project) [B06009]

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Protocol

Reagent

摘要

The fluorescent nanomaterials play an important role in cellular imaging. Although the synthesis of fluorescent metal nanoclusters (NCs) have been developing rapidly, there are many technical issues in preparing metal alloy NCs. Herein, we used a facile galvanic replacement reaction to prepare Ag/Au alloy NCs. The characterizations of UV, PL, HRTEM, EDX and XPS confirm one fact the Ag/Au alloy NCs are carried out. As-prepared Ag/Au alloy NCs display near-infrared (NIR) fluorescence centered at 716 nm and show tunable luminescence from visible red (614 nm) to NIR (716 nm) by controlling the experimental Ag/Au ratios. Moreover, as-prepared Ag/Au alloy NCs are protected by glutathione (GSH) whose some functional groups including thiol, carboxyl and amino groups make the as-prepared alloy NCs exhibit good dispersion in aqueous solution, high physiological stability and favorable biocompatibility. Together with NIR fluorescence, these advantages make alloy NCs be promising candidate in biological labeling. Crown Copyright (C) 2013 Published by Elsevier Inc. All rights reserved.

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