NDLI: Facet- and Gas-Dependent Reshaping of Au Nanoplates by Plasma Treatment.

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Facet- and Gas-Dependent Reshaping of Au Nanoplates by Plasma Treatment.

Content Provider	Europe PMC
Author	Ai, Ruoqi Boukouvala, Christina Lewis, George Wang, Hao Zhang, Han Lai, Yunhe Huang, He Ringe, Emilie Shao, Lei Wang, Jianfang
Copyright Year	2021
Abstract	Thereshaping of metal nanocrystals on substrates is usually realizedby pulsed laser irradiation or ion-beam milling with complex procedures.In this work, we demonstrate a simple method for reshaping immobilizedAu nanoplates through plasma treatment. Au nanoplates can be reshapedgradually with nearly periodic right pyramid arrays formed on thesurface of the nanoplates. The gaseous environment in the plasma-treatmentsystem plays a significant role in the reshaping process with onlynitrogen-containing environments leading to reshaping. The reshapingphenomenon is facet-dependent, with right pyramids formed only onthe exposed {111} facets of the Au nanoplates. The morphological changeof the Au nanoplates induced by the plasma treatment leads to largeplasmon peak redshifts. The reshaped Au nanoplates possess slightlyhigher refractive index sensitivities and largely increased surface-enhancedRaman scattering intensities compared to the flat, untreated nanoplates.Our results offer insights for studying the interaction mechanismbetween plasma and the different facets of noble metal nanocrystalsand an approach for reshaping light-interacting noble metal nanocrystals.
ISSN	19360851
Journal	ACS Nano
Volume Number	15
PubMed Central reference number	PMC8223482
Issue Number	6
PubMed reference number	34114456
e-ISSN	1936086X
DOI	10.1021/acsnano.1c00861
Language	English
Publisher	AmericanChemical Society
Publisher Date	2021-06-11
Access Restriction	Open
Rights License	Permits the broadest form of re-use including for commercial purposes, provided that author attribution and integrity are maintained (https://creativecommons.org/licenses/by/4.0/). © 2021 AmericanChemical Society
Subject Keyword	gold nanocrystals gold nanoplates plasmatreatment plasmon resonance reshaping surface-enhanced Raman scattering
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology Physics and Astronomy Engineering Materials Science

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