Davison, G;
Yin, Y;
Jones, T;
Parkin, IP;
Peveler, WJ;
Lee, TC;
(2023)
Multi-mode enhanced Raman scattering spectroscopy using aggregation-free hybrid metal/metal-oxide nanoparticles with intrinsic oxygen vacancies.
Journal of Materials Chemistry C
, 11
(9)
pp. 3334-3341.
10.1039/d2tc05069b.
Preview |
PDF
Parkin_Multi-mode enhanced Raman scattering spectroscopy using aggregation-free hybrid metal:metal-oxide nanoparticles with intrinsic oxygen vacancies_VoR.pdf - Published Version Download (1MB) | Preview |
Abstract
Surface-enhanced Raman scattering (SERS) spectroscopy, with strong and stable signals, was achieved in aqueous solution using colloidal hybrid nanoparticles, consisting of gold nanotriangles (Au NTs) with a nanoscale coating of tin dioxide (SnO2). The observed strong SERS signals can be attributed to an electromagnetic enhancement from the anisotropic Au NTs, and chemical enhancement resulted from the photo-induced charge transfer from SnO2 to Au NTs. The latter was enabled by the presence of persistent inter-band levels introduced by the intrinsic oxygen vacancies in SnO2, as well as by the nanoscale mixing of the two components. Moreover, the intrinsic oxygen vacancies in highly defected SnO2 nanostructures and the aggregation-free approach underpin the high stability of SERS signals. The multi-mode enhanced Raman signal could be further boosted by in situ UV-irradiation and, as a proof-of-concept application, detection of an explosive marker 2,4-dinitrotoluene (DNT) was demonstrated in aqueous solution, achieving a detection limit down to 6 nM (1 μg mL−1) with a significant signal enhancement of 22 times over and above the SERS signals of bare Au NTs.
| Type: | Article |
|---|---|
| Title: | Multi-mode enhanced Raman scattering spectroscopy using aggregation-free hybrid metal/metal-oxide nanoparticles with intrinsic oxygen vacancies |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1039/d2tc05069b |
| Publisher version: | https://doi.org/10.1039/d2tc05069b |
| Language: | English |
| Additional information: | This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > MAPS Faculty Office UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > MAPS Faculty Office > Institute for Materials Discovery |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10166568 |
Archive Staff Only
 |
View Item |
