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Tailor-engineered plasmonic single-lattices: harnessing localized surface plasmon resonances for visible-NIR light-enhanced photocatalysis

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Abstract

A platform material composed of 2D gold (Au) nanodot plasmonic single-lattices (Au-nD-PSLs) featuring tailor-engineered geometric features for visible-NIR light-driven enhanced photocatalysis is presented. Au-nD-PSLs efficiently harness incident visible-NIR electromagnetic waves to accelerate photo-chemical reactions by localized surface plasmon resonance (LSPR) effects. Au-nD-PSLs are fabricated by a straightforward, industrially scalable template-assisted approach, using nanopatterned aluminum substrates as templates. The method overcomes the constraints of direct writing lithography and allows Au-nD-PSLs to be transferred to arbitrary functional flexible substrates. Triangular lattice Au-nD-PSLs feature tunable and controllable characteristic LSPR bands across the visible spectrum. Strongly localized electromagnetic fields around Au-nD-PSLs are responsible for the outstanding photocatalytic performance of these plasmonic nanostructures, as demonstrated by finite-difference time-domain simulations and experimental observations. Our approach of rational engineering of LSPR effects in Au-nD-PSLs provides exciting opportunities to develop high-performing and reusable photocatalysts that harvest the visible-NIR spectrum for a broad range of optoelectronic and plasmonic applications.

Graphical abstract: Tailor-engineered plasmonic single-lattices: harnessing localized surface plasmon resonances for visible-NIR light-enhanced photocatalysis

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Article information


Submitted
19 Dec 2019
Accepted
27 Mar 2020
First published
27 Mar 2020

Catal. Sci. Technol., 2020, Advance Article
Article type
Paper

Tailor-engineered plasmonic single-lattices: harnessing localized surface plasmon resonances for visible-NIR light-enhanced photocatalysis

S. Y. Lim, C. S. Law, F. Bertó-Roselló, L. Liu, M. Markovic, J. Ferré-Borrull, A. D. Abell, N. H. Voelcker, L. F. Marsal and A. Santos, Catal. Sci. Technol., 2020, Advance Article , DOI: 10.1039/C9CY02561H

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