GSH-Au nanoclusters

Gold nanoclusters (AuNCs) are molecular-level aggregates consisting of a core of several to dozens of gold atoms, protected by organic monomers such as thiol compounds or proteins. GSH-AuNCs utilize glutathione (a thiol-containing tripeptide) as both a reducing agent and a protecting group, reacting chemically with gold atoms to form nanoclusters, representing a transitional state between metal atoms and metal nanoparticles. Due to size effects and the emergence of quantized energy levels, GSH-AuNCs possess unique optical properties, such as tunable fluorescence emission spectra. Their fluorescence emission wavelength can be tuned with variations in particle size and composition.

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