Spontaneous alloying of ultrasmall non-stoichiometric Ag–In–S and Cu–In–S quantum dots in aqueous colloidal solutions
Open Access
- 15 June 2021
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in RSC Advances
- Vol. 11 (34), 21145-21152
- https://doi.org/10.1039/d1ra03179a
Abstract
The effect of spontaneous alloying of non-stoichiometric aqueous Ag–In–S (AIS) and Cu–In–S (CIS) quantum dots (QDs) stabilized by surface glutathione (GSH) complexes was observed spectroscopically due to the phenomenon of band bowing typical for the solid–solution Cu(Ag)–In–S (CAIS) QDs. The alloying was found to occur even at room temperature and can be accelerated by a thermal treatment of colloidal mixtures at around 90 °C with no appreciable differences in the average size observed between alloyed and original individual QDs. An equilibrium between QDs and molecular and clustered metal–GSH complexes, which can serve as “building material” for the new mixed CAIS QDs, during the spontaneous alloying is assumed to be responsible for this behavior of GSH-capped ternary QDs. The alloying effect is expected to be of a general character for different In-based ternary chalcogenides.Funding Information
- Deutsche Forschungsgemeinschaft (DFG project ZA-146/45-1)
This publication has 25 references indexed in Scilit:
- Luminescent Ag-doped In2S3 nanoparticles stabilized by mercaptoacetate in water and glycerolJournal of Nanoparticle Research, 2015
- Rapid spontaneous alloying between Pd nanocubes and Ag nanoparticles in aqueous solution at ambient temperatureChemical Communications, 2013
- Size-Dependent Spontaneous Alloying of Au−Ag NanoparticlesJournal of the American Chemical Society, 2002
- Spontaneous mixing of binary alkali halide crystal by successive evaporationPhysica E: Low-dimensional Systems and Nanostructures, 2002
- Spontaneous alloying in binary metal microclusters: A molecular dynamics studyPhysical Review B, 2001
- Solid-state alloying in nanostructured binary systems with positive heat of mixingMaterials Science and Engineering: A, 2000
- In situ TEM observation of spontaneous alloying in nanometer-sized particlesBulletin of Materials Science, 1999
- Classical dynamical simulation of spontaneous alloyingThe European Physical Journal D, 1998
- Spontaneous alloying in atom clusters in ZnS-CdSe pseudo-binary systemIntermetallics, 1996
- FORMATION OF AgI CLUSTERS BY SPONTANEOUS ALLOYING OF IODINE INTO SILVER CLUSTERSSurface Review and Letters, 1996