Evolution from the plasmon to exciton state in ligand-protected atomically precise gold nanoparticles

Zhou, Meng; Zeng, Chenjie; Chen, Yuxiang; Zhao, Shuo; Sfeir, Matthew Y.; Zhu, Manzhou; Jin, Rongchao

doi:10.1038/ncomms13240

Title: Evolution from the plasmon to exciton state in ligand-protected atomically precise gold nanoparticles

Journal Article · Mon Oct 24 00:00:00 EDT 2016 · Nature Communications

DOI:https://doi.org/10.1038/ncomms13240· OSTI ID:1347376

Zhou, Meng ^[1]; Zeng, Chenjie ^[1]; Chen, Yuxiang ^[1]; Zhao, Shuo ^[1]; Sfeir, Matthew Y. ^[2]; Zhu, Manzhou ^[3]; Jin, Rongchao ^[1]

Carnegie Mellon Univ., Pittsburgh, PA (United States)
Brookhaven National Lab. (BNL), Upton, NY (United States)
Anhui Univ., Anhui (China)

The evolution from the metallic (or plasmonic) to molecular state in metal nanoparticles constitutes a central question in nanoscience research because of its importance in revealing the origin of metallic bonding and offering fundamental insights into the birth of surface plasmon resonance. Previous research has not been able to probe the transition due to the unavailability of atomically precise nanoparticles in the 1–3 nm size regime. Herein, we investigate the transition by performing ultrafast spectroscopic studies on atomically precise thiolate-protected Au₂₅, Au₃₈, Au₁₄₄, Au₃₃₃, Au_~520 and Au_~940 nanoparticles. Our results clearly map out three distinct states: metallic (size larger than Au333, that is, larger than 2.3 nm), transition regime (between Au₃₃₃ and Au₁₄₄, that is, 2.3–1.7 nm) and non-metallic or excitonic state (smaller than Au₁₄₄, that is, smaller than 1.7 nm). As a result, the transition also impacts the catalytic properties as demonstrated in both carbon monoxide oxidation and electrocatalytic oxidation of alcohol.

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Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC00112704

OSTI ID:: 1347376

Report Number(s):: BNL-113660-2017-JA; R&D Project: 16063/16058; KC0403020

Journal Information:: Nature Communications, Vol. 7; ISSN 2041-1723

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 173 works

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Center for Functional Nanomaterials
nanoparticles
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Title: Evolution from the plasmon to exciton state in ligand-protected atomically precise gold nanoparticles

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