Arumugam, s (2021) Structure-Property-Performance Relationships of Dielectric Nanostructures for Mie Resonance�Enhanced Dye-Sensitization. Structure-Property-Performance Relationships of Dielectric Nanostructures for Mie Resonance�Enhanced Dye-Sensitization, 5 (5). pp. 1-53.

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Abstract

Dye-sensitized photocatalytic (DSP) approach is considered as one of the promising approaches
for developing visible light- and near-infrared light-responsive photocatalysts. DSP systems are
still affected by significant drawbacks, such as low light absorption efficiency. Recently, it has
been demonstrated that the plasmonic metal nanostructures can be used to enhance the light
absorption efficiency and the overall dye-sensitization rate of DSP systems through the plasmonic
Mie resonance-enhanced dye-sensitization approach. In this contribution, we report an alternate
and novel approach, dielectric Mie resonance-enhanced dye sensitization. Specifically, we
demonstrate that the dielectric Mie resonances in cuprous oxide (Cu2O) spherical and cubical
nanostructures can be used to enhance the dye-sensitization rate of methylene blue dye. The Cu2O
nanostructures exhibiting dielectric Mie resonances exhibit up to an order of magnitude higher
dye-sensitization rate as compared to Cu2O nanostructures not exhibiting dielectric Mie
resonances. Our model system developed from finite-difference time-domain simulation predicts
a volcano-type relationship between the dye sensitization rate and the size of Cu2O nanostructures.
The predicted structure-property-performance relationship is experimentally verified and the
optimal size ranges of Cu2O nanospheres and nanocubes are identified. Although we demonstrate
the dielectric Mie resonance-enhanced dye-sensitization approach using Cu2O nanostructures, the
proposed approach can be used to design a wide range of DSP systems, including CeO2, α-Fe2O3,
and TiO2 nanostructures-based DSP systems.

Item Type: Article
Uncontrolled Keywords: Dye Sensitization, Mie Resonance, Dielectric Resonance, Metal Oxide, Semiconductor
Divisions: PSG College of Arts and Science > Department of Chemistry
Depositing User: Mr Team Mosys
Date Deposited: 23 Aug 2024 08:32
Last Modified: 23 Aug 2024 08:32
URI: https://ir.psgcas.ac.in/id/eprint/2182

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