Photoluminescent AuCu bimetallic nanoclusters as pH sensors and catalysts

Chen, Po‐Cheng; Ma, Jiaze; Chen, Liyi; Lin, Guan-Lin; Shih, Chung-Chien; Lin, Tai‐Yuan; Chang, Huan‐Tsung

doi:10.1039/c3nr06123j

Cited by 73 publications

(38 citation statements)

References 44 publications

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“…Similar to the trends in excitation wavelength, emission wavelength and photoluminescence intensity, solid solution Cu- 15 Pd NPs show enhanced quantum yield, especially compared to the single-metal NPs (2.75% for Cu NPs and 0.71% for Pd NPs). The sample obtained from the equimolar feeding ratio had the highest quantum yield (3.10%).…”

Section: Optical Propertiesmentioning

confidence: 54%

“…Noble metal nanoparticles (NPs), such as Au, Ag, Cu, Pd and 15 Pt, have attracted significant attention because, compared to bulk metals, they have unique and intriguing size-dependent properties. Optical, electrical and catalytic properties, as well as melting point depression, of metal NPs all depend on NP size, which makes them promising for applications such as optical devices, 20 catalysis, biosensors, bioimaging and so on.…”

Section: Introductionmentioning

confidence: 99%

“…[12][13][14][15][16][17][18][19] Therefore, creating alloy NPs with controllable composition should offer a feasible approach to modify the photoluminescent properties of noble metal NPs. While photoluminescent properties of noble metal NPs such as 35 Au, Ag, Cu and Pd as well as some of their alloys, such as AuCu [14][15] or Au-Ag, [16][17] have been studied, little attention has been given to Cu and Pd solid solution NPs. At bulk scale, Cu and Pd can form binary solid solutions over the entire composition range, which makes them a good system for studying the formation and 40 properties of binary metallic alloys at nanoscale.…”

Section: Introductionmentioning

confidence: 99%

“…In our case, the Pd 3d 5/2 spectrum can be deconvoluted into three symmetric 15 peaks for Pd in Cu-Pd NPs and two for Pd single-metal NPs. These three components are assigned to PdO, the Pd core and the Pd surface in order of decreasing binding energy ( Figure 4A); in Pd NPs, the PdO component seems negligible.…”

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confidence: 99%

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Synthesis of binary solid solution Cu–Pd nanoparticles by DMF reduction for enhanced photoluminescence properties

et al. 2015

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We report use of a DMF reduction method for straightforward synthesis of binary solid solution Cu-Pd nanoparticles (NPs) over the entire range of composition. The resulting NPs were uniform in size (less than 2.5 nm), tunable in composition, and exhibited photoluminescent properties that were nonlinear in composition. These binary solid solution NPs exhibited values of such photoluminescent properties as 10 photoluminescent intensity and quantum yield that were enhanced compared to those of the single-metal NPs and their mixtures. These enhancements make the alloy NPs promising materials for optical applications.

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Section: Optical Propertiesmentioning

confidence: 54%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Synthesis of binary solid solution Cu–Pd nanoparticles by DMF reduction for enhanced photoluminescence properties

et al. 2015

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“…For example, Prof. Chang's research paper defined the pH sensing ability of AuCu bimetallic NCs (Φ = 4.8%), which was synthesized through a one-pot approach [194]. Notably, the above probe also showed the catalytic activity in the degradation of methylene blue.…”

Section: Advantages and Limitationsmentioning

confidence: 99%

Luminescent Metal Nanoclusters for Potential Chemosensor Applications

Shellaiah

Sun

2017

Chemosensors

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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.

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Rapid Sonochemical Synthesis of Luminescent and Paramagnetic Copper Nanoclusters for Bimodal Bioimaging

et al. 2015

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Herein, luminescent and magnetic copper nanoclusters (CuNCs)a re synthesized by ao ne-pot sonochemical route using glutathione (GSH) as ar educing and stabilizing agent.T he resultant CuNCs show red fluorescence and paramagnetic properties at room temperature. In addition, the as-prepared GSH-CuNCs are water-soluble, exhibit low toxicity,a nd have multifunctional surface chemistry due to the GSH protective layer.F olic acid (FA) was covalently anchored to the GSH-CuNCs, and the nanoprobes were used for highly selective, targeted fluorescent imaging (FI) of gastric cancer HeLa cells with laser scanning confocal microscopy.F inally,t he as-prepared GSH-CuNCs could work as T 1 contrasta gents for magnetic resonance imaging (MRI) due to their paramagnetic properties. These findings highlight the fascinating features of luminescent and magnetic CuNCs, which are ap romising platform for bimodal MRI/FI of cancerc ells.[a] Dr.

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Photoluminescent AuCu bimetallic nanoclusters as pH sensors and catalysts

Cited by 73 publications

References 44 publications

Synthesis of binary solid solution Cu–Pd nanoparticles by DMF reduction for enhanced photoluminescence properties

Synthesis of binary solid solution Cu–Pd nanoparticles by DMF reduction for enhanced photoluminescence properties

Luminescent Metal Nanoclusters for Potential Chemosensor Applications

Rapid Sonochemical Synthesis of Luminescent and Paramagnetic Copper Nanoclusters for Bimodal Bioimaging

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