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Photoluminescence: Applications

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Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...

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Synthesis of Near-Infrared Emitting Gold Nanoclusters for Biological Applications

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Gold Nanocluster-Based Luminescence Microcomposites by Interfacial Polymerization.

Xuan Zhao¹, Donghao Qi¹, Yonghui Zan¹

¹School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, P. R. China.

Chemistry (Weinheim an Der Bergstrasse, Germany)

|July 24, 2025

Summary

Researchers created fluorescent microcomposite shells using gold nanoclusters and polymerization. These shells exhibit tunable white luminescence, opening doors for advanced optical technologies.

Keywords:

emulsion gold nanocluster interface polymerization nanocomposite photofunctionality

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Area of Science:

Materials Science
Nanotechnology
Optics

Background:

Interfacial polymerization in emulsions precisely fabricates cavity-like architectures for composite construction.
Fluorescent gold nanoclusters stabilize emulsions and impart luminescence to composites.

Purpose of the Study:

To prepare fluorescent emulsions using modified gold nanoclusters as monomers in interfacial polymerization.
To create microcomposite spherical shells with enhanced optical properties by incorporating a secondary fluorescent dye.

Main Methods:

Controlled interfacial polymerization using modified gold nanoclusters as interfacial stabilizers and monomers.
Localization of gold nanoclusters on droplet surfaces to form spherical shells.
Incorporation of an additional fluorescent dye as filler within the shells.

Main Results:

Successful preparation of fluorescent spherical shell structures via interfacial polymerization.
Formation of microcomposites exhibiting unique optical characteristics due to dual luminophores.
Observation of white luminescence tunable to different colors based on incident light.

Conclusions:

Modified gold nanoclusters serve as effective monomers and stabilizers in interfacial polymerization.
The developed microcomposites possess tunable optical properties for potential applications.
This method offers novel possibilities for advanced optical technologies.