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Chemosensors 2017, 5(4), 36; https://doi.org/10.3390/chemosensors5040036

Luminescent Metal Nanoclusters for Potential Chemosensor Applications

1
Department of Applied Chemistry, National Chiao Tung University, Hsinchu 300, Taiwan
2
Department of Electronics Engineering, National Chiao Tung University, Hsinchu 300, Taiwan
*
Author to whom correspondence should be addressed.
Received: 21 November 2017 / Revised: 7 December 2017 / Accepted: 8 December 2017 / Published: 19 December 2017
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Abstract

Studies of metal nanocluster (M-NCs)-based sensors for specific analyte detection have achieved significant progress in recent decades. Ultra-small-size (<2 nm) M-NCs consist of several to a few hundred metal atoms and exhibit extraordinary physical and chemical properties. Similar to organic molecules, M-NCs display absorption and emission properties via electronic transitions between energy levels upon interaction with light. As such, researchers tend to apply M-NCs in diverse fields, such as in chemosensors, biological imaging, catalysis, and environmental and electronic devices. Chemo- and bio-sensory uses have been extensively explored with luminescent NCs of Au, Ag, Cu, and Pt as potential sensory materials. Luminescent bi-metallic NCs, such as Au-Ag, Au-Cu, Au-Pd, and Au-Pt have also been used as probes in chemosensory investigations. Both metallic and bi-metallic NCs have been utilized to detect various analytes, such as metal ions, anions, biomolecules, proteins, acidity or alkalinity of a solution (pH), and nucleic acids, at diverse detection ranges and limits. In this review, we have summarized the chemosensory applications of luminescent M-NCs and bi-metallic NCs. View Full-Text
Keywords: nanoclusters; fluorescent assay; nanosensors; bio-imaging; real analysis; colorimetric recognition; biomolecules detection; bi-metallic clusters nanoclusters; fluorescent assay; nanosensors; bio-imaging; real analysis; colorimetric recognition; biomolecules detection; bi-metallic clusters
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Shellaiah, M.; Sun, K.W. Luminescent Metal Nanoclusters for Potential Chemosensor Applications. Chemosensors 2017, 5, 36.

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