Issue 39, 2020

Tin oxide subnanoparticles: a precisely-controlled synthesis, subnano-detection for their detailed characterisation and applications

Abstract

Subnanometric metal particles exhibit anomalous chemical activity, suggesting innovative applications as next-generation materials. However, a precise synthesis and detailed characterisation of these subnano-materials remain a major challenge. Here we summarise recent works on the synthesis of size-controlled tin (Sn) oxide subnanoparticles (SNPs) using the dendrimer template method, and on their detailed characterisation. Size-controlled Sn oxide SNPs (Sn12, Sn28 and Sn60) have been synthesised and they showed a size-dependent compositional change containing not only stable Sn(IV) states but also metastable Sn(II) states so as to form subnano-scaled particle shapes. Detailed vibrational characterisation of SNPs was achieved by employing subnano-sensitive Raman spectroscopy for spectroscopic characterisation. Combined with density functional theory studies, the inherent subnano-structures of Sn oxide SNPs have been elucidated for the first time. Furthermore, the size-dependent activity of Sn oxide SNPs upon CO oxidation was rationally explained from the simulated structure of Sn oxide SNPs. A detailed understanding of the chemical and physical nature of subnano-materials facilitates the rational design of SNPs for practical applications such as catalysis, biosensors, and electronics.

Graphical abstract: Tin oxide subnanoparticles: a precisely-controlled synthesis, subnano-detection for their detailed characterisation and applications

Article information

Article type
Frontier
Submitted
20 Jun 2020
Accepted
21 Jul 2020
First published
22 Jul 2020

Dalton Trans., 2020,49, 13512-13518

Author version available

Tin oxide subnanoparticles: a precisely-controlled synthesis, subnano-detection for their detailed characterisation and applications

A. Kuzume and K. Yamamoto, Dalton Trans., 2020, 49, 13512 DOI: 10.1039/D0DT02186E

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