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Sensors 2016, 16(7), 1124;

Facile Fabrication of a Gold Nanocluster-Based Membrane for the Detection of Hydrogen Peroxide

College of Pharmacy, Chongqing Research Center for Pharmaceutical Engineering, Chongqing Medical University, Chongqing 400016, China
Chongqing Key Laboratory of Green Synthesis and Applications, College of Chemistry, Chongqing Normal University, Chongqing 401331, China
Department of Laboratory Medicine, Key Laboratory of Diagnostic Medicine designated by the Ministry of Education, Chongqing Medical University, Chongqing 400016, China
Author to whom correspondence should be addressed.
Academic Editor: W. Rudolf Seitz
Received: 20 May 2016 / Revised: 13 July 2016 / Accepted: 15 July 2016 / Published: 20 July 2016
(This article belongs to the Section Chemical Sensors)
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In this work, we present a simple and rapid method to synthesize red luminescent gold nanoclusters (AuNCs) with high quantum yield (QY, ~16%), excellent photostability and biocompatibility. Next, we fabricated a solid membrane by loading the as-prepared AuNCs in an agar matrix. Different from nanomaterials dispersed in solution, the AuNCs-based solid membrane has distinct advantages including convenience of transportation, while still maintaining strong red luminescence, and relatively long duration storage without aggregation. Taking hydrogen peroxide (H2O2) as a typical example, we then employed the AuNCs as a luminescent probe and investigated their sensing performance, either in solution phase or on a solid substrate. The detection of H2O2 could be achieved in wide concentration ranges over 805 nM–1.61 mM and 161 μM–19.32 mM in solution and on a solid membrane, respectively, with limits of detection (LOD) of 80 nM and 20 μM. Moreover, the AuNCs-based membrane could also be used for visual detection of H2O2 in the range of 0–3.22 mM. In view of the convenient synthesis route and attractive luminescent properties, the AuNCs-based membrane presented in this work is quite promising for applications such as optical sensing, fluorescent imaging, and photovoltaics. View Full-Text
Keywords: gold nanoclusters; luminescence; membrane; hydrogen peroxide gold nanoclusters; luminescence; membrane; hydrogen peroxide

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Zhang, P.; Wang, Y.; Yin, Y. Facile Fabrication of a Gold Nanocluster-Based Membrane for the Detection of Hydrogen Peroxide. Sensors 2016, 16, 1124.

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