Probing nanoscale spatial distribution of plasmonically excited hot carriers.

Abstract:

:Surface plasmons (SPs) of metals enable the tight focusing and strong absorption of light to realize an efficient utilization of photons at nanoscale. In particular, the SP-generated hot carriers have emerged as a promising way to efficiently drive photochemical and photoelectric processes under moderate conditions. In situ measuring of the transport process and spatial distribution of hot carriers in real space is crucial to efficiently capture the hot carriers. Here, we use electrochemical tip-enhanced Raman spectroscopy (EC-TERS) to in situ monitor an SP-driven decarboxylation and resolve the spatial distribution of hot carriers with a nanometer spatial resolution. The transport distance of about 20 nm for the reactive hot carriers is obtained from the TERS imaging result. The hot carriers with a higher energy have a shorter transport distance. These conclusions can be guides for the design and arrangement of reactants and devices to efficiently make use of plasmonic hot carriers.

journal_name

Nat Commun

journal_title

Nature communications

authors

Huang SC,Wang X,Zhao QQ,Zhu JF,Li CW,He YH,Hu S,Sartin MM,Yan S,Ren B

doi

10.1038/s41467-020-18016-4

subject

Has Abstract

pub_date

2020-08-24 00:00:00

pages

4211

issue

1

issn

2041-1723

pii

10.1038/s41467-020-18016-4

journal_volume

11

pub_type

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