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Following the Formation of Silver Nanoparticles Using in Situ X-ray Absorption Spectroscopy

Godfrey, IJ; Dent, AJ; Parkin, IP; Maenosono, S; Sankar, G; (2020) Following the Formation of Silver Nanoparticles Using in Situ X-ray Absorption Spectroscopy. ACS Omega , 5 (23) pp. 13664-13671. 10.1021/acsomega.0c00697. Green open access

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Abstract

The formation of silver and Au@Ag core@shell nanoparticles via reduction of AgNO3 by trisodium citrate was followed using in situ X-ray absorption near-edge structure (XANES) spectroscopy and time-resolved UV-visible (UV-vis) spectroscopy. The XANES data were analyzed through linear combination fitting, and the reaction kinetics were found to be consistent with first-order behavior with respect to silver cations. For the Au@Ag nanoparticles, the UV-vis data of a lab-scale reaction showed a gradual shift in dominance between the gold- and silver-localized surface plasmon absorbance bands. Notably, throughout much of the reaction, distinct gold and silver contributions to the UV-vis spectra were observed; however, in the final product, the contributions were not distinct.

Type: Article
Title: Following the Formation of Silver Nanoparticles Using in Situ X-ray Absorption Spectroscopy
Open access status: An open access version is available from UCL Discovery
DOI: 10.1021/acsomega.0c00697
Publisher version: https://doi.org/10.1021/acsomega.0c00697
Language: English
Additional information: This is an open access article published under a Creative Commons Non-Commercial No Derivative Works (CC-BY-NC-ND) Attribution License, which permits copying and redistribution of the article, and creation of adaptations, all for non-commercial purposes.
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 > Dept of Chemistry
URI: https://discovery.ucl.ac.uk/id/eprint/10101466
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