Chankhunthod, N, Aslam, Z, Critchley, K et al. (2 more authors) (2017) Kinetically controlled fabrication of gold nanorods and investigation of their thermal stability via in-situ TEM heating. In: Journal of Physics: Conference Series. Electron Microscopy and Analysis Group Conference 2017 (EMAG2017), 03-06 Jul 2017, Manchester, UK. IOP Publishing .
Abstract
Size controlled CTAB-capped AuNRs with various aspect ratios (ARs) ranging from 1.63±0.13 to 4.12±0.25 were synthesized following a modified seed-mediated method. Their thermal stability was examined by in-situ TEM heating. The results revealed a structural change from rods to spheres with increasing temperature. At lower temperatures < 300ºC, the AR decreased rapidly and, for temperatures >600ºC, particles became increasingly spherical. This behaviour occurred at temperatures lower than the melting point of bulk gold supporting a surface diffusion mechanism with material diffusing from the tips and redepositing at the middle of the rods. The rate of change in AR appeared to increase for thinner AuNRs.
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Copyright, Publisher and Additional Information: | Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. | ||||
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Institution: | The University of Leeds | ||||
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Physics and Astronomy (Leeds) > Molecular & Nanoscale Physics |
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Depositing User: | Symplectic Publications | ||||
Date Deposited: | 14 Dec 2017 10:27 | ||||
Last Modified: | 14 Dec 2017 10:27 | ||||
Status: | Published | ||||
Publisher: | IOP Publishing | ||||
Identification Number: | https://doi.org/10.1088/1742-6596/902/1/012007 |