Liu, Y orcid.org/0000-0002-9367-3532, Song, C, Lv, G et al. (3 more authors) (2019) Relationships between the electrical properties and nanostructure of soot particles in a laminar inverse diffusion flame. Proceedings of the Combustion Institute, 37 (1). pp. 1185-1192. ISSN 1540-7489
Abstract
This paper studies the electrical properties of the soot particles generated from an n-heptane inverse diffusion flame and the relationship between the electrical properties and the nanostructure. The electrical conductivity of isolated soot particle and work function of soot particles were measured by a PeakForce tunneling atomic force microscopy and a Kelvin-probe force microscopy. The nanostructure of soot particles was evaluated using X-ray diffraction and X-ray photoelectron spectroscopy. Different electrical conductivity distributions were found as the soot particles gradually matured, and at the same time the mean electrical conductivity of soot particles exhibited a nearly exponential increase. There existed a percolation threshold at which the mean electrical conductivity sharply increased by approximately two orders of magnitude. Similarly, the work function of soot particles increased during soot maturation process, which implies that it becomes harder for the electrons to escape from the soot samples. The crystallite width had a positive correlation with the logarithm of electrical conductivity and the work function for soot particles, while the interlayer spacing presented a negative correlation with the logarithm of electrical conductivity and work function. These results suggest that the electrical conductivity and work function can serve as indicators of ordering degree of soot particles. Moreover, the dependence of electrical properties on the nanostructure demonstrates the potential of better controlled flame conditions for producing tailored soot particles for a variety of applications.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2018 The Combustion Institute. Published by Elsevier Inc. All rights reserved. This is an author produced version of an article published in Proceedings of the Combustion Institute. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Soot particle; Atomic force microscopy; Electrical conductivity; Work function; Nanostructure |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Environment (Leeds) > Institute for Transport Studies (Leeds) > ITS: Spatial Modelling and Dynamics (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 01 Apr 2021 10:21 |
Last Modified: | 25 Jun 2023 22:37 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.proci.2018.06.090 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:172714 |