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Synthesis of Near-Infrared Emitting Gold Nanoclusters for Biological Applications
Published on: March 22, 2020
Cu nanoclusters with aggregation induced emission enhancement.
Xiaofang Jia1, Jing Li, Erkang Wang
1State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, 130022, China; Graduate School of the Chinese Academy of Sciences, Beijing, 100039, China.
Small (Weinheim an Der Bergstrasse, Germany)
|May 15, 2013
Summary
Researchers developed a simple method to create stable, luminescent copper nanoclusters (CuNCs) using size-focusing etching. These CuNCs show enhanced fluorescence upon aggregation, enabling applications in sensors and bioimaging.
Area of Science:
- Nanotechnology
- Materials Science
- Photochemistry
Background:
- Developing stable, luminescent nanomaterials is crucial for advanced applications.
- Controlling nanoparticle size and optical properties remains a challenge.
Purpose of the Study:
- To present a facile method for synthesizing water-soluble, luminescent copper nanoclusters (CuNCs).
- To investigate the size-focusing etching process for selective CuNC formation.
- To explore the aggregation-induced emission enhancement effect of CuNCs.
Main Methods:
- Utilized size-focusing etching from nonluminescent nanocrystals.
- Employed glutathione as a ligand for selective synthesis of the smallest Cu2 cluster.
- Analyzed photoluminescence and absorption spectra to monitor cluster formation and stability.
Main Results:
- Achieved selective synthesis of nearly monodisperse Cu2 clusters, avoiding size fractionation.
- Demonstrated that stable CuNC species form through surface etching.
- Observed an aggregation-induced emission enhancement effect where CuNCs exhibit stronger fluorescence upon aggregation.
Conclusions:
- The developed method offers a versatile route to stable, water-soluble, luminescent CuNCs.
- The aggregation-induced emission enhancement property expands potential applications.
- These CuNCs are promising for light-emitting diodes, chemosensors, and bioimaging systems.
