Effect of Cationic Surfactants with Different Counterions on the Growth of Au Nanoclusters

Hu, Yuanyuan; Song, Aixin; Hao, Jingcheng

doi:10.1021/acs.langmuir.8b00603

Cited by 8 publications

(4 citation statements)

References 49 publications

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“…They are 3.1/3.9 mM for TTAB and 0.23/0.25 mM for STAB. These data are consistent with the results in our previous report . The cmc order of XTAB is STAB < CTAB < TTAB.…”

Section: Resultssupporting

confidence: 93%

“…These data are consistent with the results in our previous report. 39 The cmc order of XTAB is STAB < CTAB < TTAB. By comparing the surface tension results and the fluorescence analysis results, we found that the lower the cmc value and the stronger the hydrophobicity, the stronger the fluorescence intensity and the longer the fluorescence lifetime.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Self-Assembly of Amphiphilic Copper Nanoclusters Driven by Cationic Surfactants

et al. 2021

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Amphiphilicity is an excellent physicochemical property, which is yet to be explored from traditional surfactants to nanoparticles. This article shows that the amphiphilicity of copper nanoclusters (CuNCs) can be readily tuned by electrostatic interactions with cationic surfactants and cetyltrimethylammonium cations (CTA + ) with counterions Br − , Cl − , and C 7 H 8 O 3 S − . Due to the role of surface ligands, the complexes of glutathione-capped CuNCs (GSH-CuNCs) and the surfactants exhibit good amphiphilicity, which enables them to self-assemble like a molecular amphiphile. This could significantly increase the utility of metal nanoclusters in basic and applied research. As the concentration of the surfactant changes, the aggregates change from nanoparticles to network-like structures. After the formation of supramolecular selfassemblies by hydrophobic interactions, the enhancement of fluorescence intensity was observed, which can be ascribed to the suppression of intramolecular vibrations based on aggregation-induced emission (AIE) and combined with the compactness of GSH-CuNCs in self-assemblies. Our study provides a facile way to generate solid fluorescent materials with excellent fluorescence performance, which may find applications in light-emitting diodes (LEDs).

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“…They are 3.1/3.9 mM for TTAB and 0.23/0.25 mM for STAB. These data are consistent with the results in our previous report . The cmc order of XTAB is STAB < CTAB < TTAB.…”

Section: Resultssupporting

confidence: 93%

Section: ■ Results and Discussionmentioning

confidence: 99%

Self-Assembly of Amphiphilic Copper Nanoclusters Driven by Cationic Surfactants

et al. 2021

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“…Atomically precise metal nanoclusters have attracted widespread attention owing to their intriguing properties and promising applications in catalysis, − imaging, − sensors, , fluorescence, − and medicine. , To date, several homometal nanoclusters have been synthesized and their structures have been determined. − The success in total structure determination provides an exclusive opportunity for understanding structure–property correlations at the atomic level. However, compared with Ag/Au nanoclusters, Cu nanoclusters − containing Cu(0) are rarely reported mainly because of the lower M(I)/M(0) half-cell potential of Cu (0.52 V, compared with 1.692 V of Au and 0.7991 V of Ag), which results in the much higher oxidation susceptibility of Cu nanoclusters.…”

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confidence: 99%

Doping Copper Atoms into the Nanocluster Kernel: Total Structure Determination of [Cu₃₀Ag₆₁(SAdm)₃₈S₃](BPh₄)

Zou

Jin

et al. 2020

J. Phys. Chem. Lett.

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Doping active metal (i.e., Cu) into the kernel of noble metal nanoclusters (i.e., Au/Ag nanocluster) remains challenging in the synthesis of alloy nanoclusters. Herein, we report the synthesis and the total structure determination of a bimetallic [Ag61Cu30(SAdm)38S3]BPh4 (Ag61Cu30) nanocluster. The Ag61Cu30 nanocluster is composed of an Ag13@Cu30 kernel which is further capped by a peripheral Ag48(SAdm)38S3 shell. The icosidodecahedron Cu30 middle layer connects the innermost icosahedral Ag13 core and Ag atoms at the outermost Ag48(SR)38S3 shell, demonstrating that the Cu atoms in the Cu30 layer are in a metallic state.

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“…It can readily bind to GNCs, causing aggregation. The aggregation effect of different cationic surfactants on the growth of GNCs was previously reported [45,46]. As the CTAB concentration increases, aggregation increases due to the increase in the GNC's aggregation and size.…”

Section: Synthesis and Optical Properties Of Ctab-gncsmentioning

confidence: 84%

Design a Friendly Nanoscale Chemical Sensor Based on Gold Nanoclusters for Detecting Thiocyanate Ions in Food Industry Applications

Ali,

Saleh

2024

Biosensors

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The surfactant cetyltrimethylammonium bromide (CTAB) induces the aggregation of gold nanoclusters (GNCs), leading to the development of a proposed fluorometric technique for detecting thiocyanate (SCN−) ions based on an anti-aggregation mechanism. This approach is straightforward to execute, highly sensitive, and selective. A significant quenching effect occurs in fluorescence upon using the aggregation agent CTAB in GNCs synthesis, resulting in a transition from intense red fluorescence to dim red. The decrease in fluorescence intensity of GNCs in the presence of CTAB is caused by the mechanism of fluorescence quenching mediated by aggregation. As the levels of SCN− rise, the fluorescence of CTAB-GNCs increases; this may be detected using spectrofluorometry or by visually inspecting under UV irradiation. The recovery of red fluorescence of CTAB-GNCs in the presence of SCN− enables the precise and discerning identification of SCN− within the concentration range of 2.86–140 nM. The minimum detectable concentration of the SCN− ions was 1 nM. The selectivity of CTAB-GNCs towards SCN− ions was investigated compared to other ions, and it was demonstrated that CTAB-GNCs exhibit exceptional selectivity. Furthermore, we believe that CTAB-GNCs have novel possibilities as favorable sensor candidates for various industrial applications. Our detection technique was validated by analyzing SCN− ions in milk samples, which yielded promising results.

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Effect of Cationic Surfactants with Different Counterions on the Growth of Au Nanoclusters

Cited by 8 publications

References 49 publications

Self-Assembly of Amphiphilic Copper Nanoclusters Driven by Cationic Surfactants

Self-Assembly of Amphiphilic Copper Nanoclusters Driven by Cationic Surfactants

Doping Copper Atoms into the Nanocluster Kernel: Total Structure Determination of [Cu₃₀Ag₆₁(SAdm)₃₈S₃](BPh₄)

Design a Friendly Nanoscale Chemical Sensor Based on Gold Nanoclusters for Detecting Thiocyanate Ions in Food Industry Applications

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Effect of Cationic Surfactants with Different Counterions on the Growth of Au Nanoclusters

Cited by 8 publications

References 49 publications

Self-Assembly of Amphiphilic Copper Nanoclusters Driven by Cationic Surfactants

Self-Assembly of Amphiphilic Copper Nanoclusters Driven by Cationic Surfactants

Doping Copper Atoms into the Nanocluster Kernel: Total Structure Determination of [Cu30Ag61(SAdm)38S3](BPh4)

Design a Friendly Nanoscale Chemical Sensor Based on Gold Nanoclusters for Detecting Thiocyanate Ions in Food Industry Applications

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Doping Copper Atoms into the Nanocluster Kernel: Total Structure Determination of [Cu₃₀Ag₆₁(SAdm)₃₈S₃](BPh₄)