Surface Plasmon Modulation in Cu 3- x P Nanocrystals.

Autor: Yu J; ARC Centre of Excellence in Exciton Science, School of Chemistry, University of Melbourne, Parkville, Victoria 3010, Australia., Chen Z; ARC Centre of Excellence in Exciton Science, School of Chemistry, University of Melbourne, Parkville, Victoria 3010, Australia., Zhang H; ARC Centre of Excellence in Exciton Science, School of Chemistry, University of Melbourne, Parkville, Victoria 3010, Australia.; Spectroscopy of Soft Matter, University of Bayreuth, 95440 Bayreuth, Germany., Hutchison JA; ARC Centre of Excellence in Exciton Science, School of Chemistry, University of Melbourne, Parkville, Victoria 3010, Australia., Mulvaney P; ARC Centre of Excellence in Exciton Science, School of Chemistry, University of Melbourne, Parkville, Victoria 3010, Australia., Ashokan A; ARC Centre of Excellence in Exciton Science, School of Chemistry, University of Melbourne, Parkville, Victoria 3010, Australia.
Jazyk: angličtina
Zdroj: Nano letters [Nano Lett] 2024 Nov 20; Vol. 24 (46), pp. 14695-14701. Date of Electronic Publication: 2024 Nov 06.
DOI: 10.1021/acs.nanolett.4c03898
Abstrakt: We demonstrate modulation of the surface plasmon resonance in nonstoichiometric copper phosphide nanocrystals using spectroelectrochemical methods. Application of an anodic potential resulted in a blue-shift of the surface plasmon resonance and an incremental increase in its extinction coefficient. Conversely, upon application of a cathodic potential, the surface plasmon band red-shifted and reduced in intensity. These changes were found to be reversible over multiple cycles of anodic and cathodic potential steps. We also discuss how the postsynthetic ligand treatment impacts the surface plasmon peak and the structure of Cu 3- x P nanocrystals. For example, the addition of alkylthiols resulted in the chemical decomposition of the nanocrystals. This work demonstrates how the surface plasmon peak in Cu 3- x P can be used to probe changes in the structure and carrier density in these nanocrystals.
Databáze: MEDLINE
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