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Correlation between Spectroscopic and Mechanical Properties of Gold Nanocrystals under Pressure

Abstract: The effects of nonhydrostatic pressure on the morphology and stability of gold nanorods (AuNRs) and nanospheres (AuNSs) in 4:1 methanol?ethanol mixtures were studied by optical absorption spectroscopy and transmission electron microscopy at pressures of up to 23 and 30 GPa, respectively. Solvent solidification and associated nonhydrostatic stresses were found to have a negligible effect on the shape and size of AuNSs. On the contrary, while AuNRs maintained their initial morphology in the hydrostatic range, the uniaxial stress component induced under nonhydrostatic conditions had a shearing effect on the AuNRs, breaking them into smaller particles. Interestingly, colloidal stability was maintained in all cases, and the particles showed no sign of aggregation, despite the severe nonhydrostatic conditions to which both AuNR and AuNS colloids were subjected.

Otras publicaciones de la misma revista o congreso con autores/as de la Universidad de Cantabria

 Fuente: Journal of Physical Chemistry C, 2022, 126, 4, 1982-1990

Editorial: American Chemical Society

 Fecha de publicación: 24/01/2022

Nº de páginas: 9

Tipo de publicación: Artículo de Revista

 DOI: 10.1021/acs.jpcc.1c10767

ISSN: 1932-7447,1932-7455

Proyecto español: PGC2018-101464?B-I00

Url de la publicación: https://doi.org/10.1021/acs.jpcc.1c10767