Visualizing plasmon-mediated metal deposition and nanoparticle reshaping with liquid-phase transmission electron microscopy

IF 17.3 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Matter Pub Date : 2024-12-04 DOI:10.1016/j.matt.2024.11.006

Amy Chen, Asher Leff, Zhenpu Li, Carlos A. Ríos Ocampo, Jonathan A. Boltersdorf, Taylor J. Woehl

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引用次数: 0

Abstract

Hot carriers generated by localized surface plasmon resonance (LSPR) in metal nanoparticles can drive chemical reactions such as secondary metal deposition and catalytic reactions. Rationally designing plasmonic nanostructures requires understanding how particle geometry impacts hot carrier reaction dynamics. Here we use liquid-phase transmission electron microscopy (LP-TEM) and an electron radiolysis-resistant solvent to visualize hot carrier-mediated silver deposition and gold nanorod (AuNR) reshaping. AuNRs grew primarily in the transverse direction and displayed tip sharpening and preferential growth at LSPR hotspots. Ex situ white-light illumination produced similar morphological and compositional changes, whereas radiolysis products did not. Growth dynamics relative to electron beam flux and AuNR orientation were consistent with numerical simulations of hot carrier generation. Isolating hot carrier-induced redox processes on AuNRs during LP-TEM enabled quantifying spatially varying hot electron reaction dynamics. This approach is expected to enable quantifying and visualizing a broad range of plasmonic carrier-mediated reactions.

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来源期刊

Matter MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

26.30

自引率

2.60%

发文量

367

期刊介绍： Matter, a monthly journal affiliated with Cell, spans the broad field of materials science from nano to macro levels,covering fundamentals to applications. Embracing groundbreaking technologies,it includes full-length research articles,reviews, perspectives,previews, opinions, personnel stories, and general editorial content. Matter aims to be the primary resource for researchers in academia and industry, inspiring the next generation of materials scientists.