Ligand Tuning of Localized Surface Plasmon Resonances in Antimony-Doped Tin Oxide Nanocrystals

Language
en
Document Type
Article
Issue Date
2022-11-08
First published
2022-10-04
Issue Year
2022
Authors
Balitskii, Olexiy
Mashkov, Oleksandr
Barabash, Anastasiia
Rehm, Viktor
Afify, Hany A.
Li, Ning
Hammer, Maria S.
Brabec, Christoph J.
Eigen, Andreas
Halik, Marcus
Editor
Publisher
MDPI
Abstract

Aliovalent-doped metal oxide nanocrystals exhibiting localized surface plasmons (LSPRs) are applied in systems that require reflection/scattering/absorption in infrared and optical transparency in visible. Indium tin oxide (ITO) is currently leading the field, but indium resources are known to be very restricted. Antimony-doped tin oxide (ATO) is a cheap candidate to substitute the ITO, but it exhibits less advantageous electronic properties and limited control of the LSPRs. To date, LSPR tuning in ATO NCs has been achieved electrochemically and by aliovalent doping, with a significant decrease in doping efficiency with an increasing doping level. Here, we synthesize plasmonic ATO nanocrystals (NCs) via a solvothermal route and demonstrate ligand exchange to tune the LSPR energies. Attachment of ligands acting as Lewis acids and bases results in LSPR peak shifts with a doping efficiency overcoming those by aliovalent doping. Thus, this strategy is of potential interest for plasmon implementations, which are of potential interest for infrared upconversion, smart glazing, heat absorbers, or thermal barriers.

Journal Title
Nanomaterials
Volume
12
Issue
19
Citation
Nanomaterials 12.19 (2022): 3469. <https://www.mdpi.com/2079-4991/12/19/3469>
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