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Current Nanoscience

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ISSN (Print): 1573-4137
ISSN (Online): 1875-6786

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Research Article

Coalescence of Au Nanoparticles in Silica Aerogel under Electron Beam Irradiation

Author(s): Heena Sammi, Manish Mohanta, Bhagwati Sharma and Neha Sardana*

Volume 19, Issue 6, 2023

Published on: 29 December, 2022

Page: [863 - 869] Pages: 7

DOI: 10.2174/1573413719666221122123805

Price: $65

Abstract

Background: The coalescence of Au nanoparticles embedded in the silica gel matrix was observed by E-beam irradiation in a transmission electron microscope.

Methods: It was examined that interparticle spacing between nanoparticles was reduced after incorporation into the matrix and particles came close to each other. TEM studies have shown that during E-beam irradiation ~13 nm Au nanoparticles contacted with each other along with the shrinkage of the silica aerogel or as well as the removal of surfactant layer, and transformed into different shapes of particles such as dumbbell and chain-like particles as per the interparticle gap.

Results: This nanoparticle-aerogel matrix has the potential for applications in sensing, nonlinear optics, and catalysis.

Conclusion: This work enhances the understanding of the role of silica aerogel and E-beam irradiation in directing the coalescence of nanoparticles.

Keywords: Gold nanoparticles, silica aerogel, coalescence, surfactant, transmission electron microscope, electron beam.

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Graphical Abstract

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