Monitoring plasmonic hot-carrier chemical reactions at the single particle level

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Title: Monitoring plasmonic hot-carrier chemical reactions at the single particle level
Authors: Simoncelli, S
Pensa, EL
Brick, T
Gargiulo, J
Lauri, A
Cambiasso, J
Li, Y
Maier, SA
Cortés, E
Item Type: Journal Article
Abstract: Plasmon excitation in metal nanoparticles triggers the generation of highly energetic charge carriers that, when properly manipulated and exploited, can mediate chemical reactions. Single-particle techniques are key to unearthing the underlying mechanisms of hot-carrier generation, transport and injection, as well as to disentangling the role of the temperature increase and the enhanced near-field at the nanoparticle-molecule interface. Gaining nanoscopic insight into these processes and their interplay could aid in the rational design of plasmonic photocatalysts. Here, we present three different approaches to monitor hot-carrier reactivity at the single-particle level. We use a combination of dark-field microscopy and photoelectrochemistry to track a hot-hole driven reaction on a single Au nanoparticle. We image hot-electron reactivity with sub-particle spatial resolution using nanoscopy techniques. Finally, we push the limits by looking for a hot-electron induced chemical reaction that generates a fluorescent product, which should enable imaging plasmonic photocatalysis at the single-particle and single-molecule levels.
Issue Date: 27-Feb-2019
Date of Acceptance: 24-Oct-2018
ISSN: 1359-6640
Publisher: Royal Society of Chemistry
Journal / Book Title: Faraday Discussions
Copyright Statement: © 2019 The Royal Society of Chemistry.
Sponsor/Funder: Engineering & Physical Science Research Council (E
Funder's Grant Number: EP/M013812/1
Keywords: 0306 Physical Chemistry (incl. Structural)
0904 Chemical Engineering
Chemical Physics
Publication Status: Published online
Conference Place: England
Embargo Date: 2019-10-24
Online Publication Date: 2018-10-24
Appears in Collections:Physics
Experimental Solid State
Faculty of Natural Sciences

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