Coalescence-Driven Simultaneous Enhancement and Quenching of the Excited States of Silver Nanoclusters

Article

Abstract

ABSTRACT: Despite the successful launch of Au nanoclusters (NCs) in light energy conversion applications, the utilization of Ag NCs has been limited by their instability under continuous illumination. The main cause of photoinduced degradation pathways remains elusive. Hence, understanding the underlying mechanism behind the low stability is an urgent task to provide a new impetus for the development of Ag NCs. The slow regeneration of Ag NCs by a redox couple leads to holes in the NCs, which could result in either the photoetching ofNCs or the transformation into plasmonic nanoparticles. Transient absorption spectroscopy reveals that Ag NCs coalesce into plasmonic nanoparticles and begin to experience two conflicting effects (plasmonic enhancement and quenching effect) during this in situ transformation. It also discloses that the quenching effect prevails over the plasmonic enhancement, which eventually leads to photocurrent loss under illumination.

Attributes

Attribute NameValues
Creator
  • Seog Joon Yoon

  • Rizwan Khan

  • Junkhyun Lee

  • Jin Ho Bang

Journal or Work Title
  • The Journal of Physical Chemistry

Volume
  • 123

Issue
  • 24

First Page
  • 14921-14927

ISSN
  • 19327455

Publication Date
  • 2019-05

Subject
  • Titan TEM

Publisher
  • American Chemical Society

Date Created
  • 2019-09-26

Language
  • English

Departments and Units
Record Visibility and Access Public
Content License
  • All rights reserved

Digital Object Identifier

doi:10.1021/acs.jpcc.9b02562

This DOI is the best way to cite this article.