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Title: Modeling thermionic emission from laser-heated nanoparticles

Abstract

An adjusted form of thermionic emission is applied to calculate emitted current from laser-heated nanoparticles and to interpret time-resolved laser-induced incandescence (TR-LII) signals. This adjusted form of thermionic emission predicts significantly lower values of emitted current compared to the commonly used Richardson-Dushman equation, since the buildup of positive charge in a laser-heated nanoparticle increases the energy barrier for further emission of electrons. Thermionic emission influences the particle's energy balance equation, which can influence TR-LII signals. Additionally, reports suggest that thermionic emission can induce disintegration of nanoparticle aggregates when the electrostatic Coulomb repulsion energy between two positively charged primary particles is greater than the van der Waals bond energy. Furthermore, since the presence and size of aggregates strongly influences the particle's energy balance equation, using an appropriate form of thermionic emission to calculate emitted current may improve interpretation of TR-LII signals.

Authors:
 [1]; ORCiD logo [2];  [1]; ORCiD logo [1]
  1. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
  2. Princeton Univ., Princeton, NJ (United States)
Publication Date:
Research Org.:
Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1254732
Alternate Identifier(s):
OSTI ID: 1236525
Report Number(s):
PPPL-5209
Journal ID: ISSN 0003-6951; APPLAB
Grant/Contract Number:  
AC02-09CH11466
Resource Type:
Accepted Manuscript
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 108; Journal Issue: 5; Conference: Materials Research Society Fall Meeting, Nov 29-Dec 4, Boston, MA; Related Information: This work was supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division. James M. Mitrani acknowledges the support from the Program in Plasma Science and Technology, at the Princeton Plasma Physics Laboratory. - Check fund numbers; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; nanoparticles; thermionic emission; energy balance; charged currents; chemical bonds

Citation Formats

Mitrani, J. M., Shneider, M. N., Stratton, B. C., and Raitses, Y. Modeling thermionic emission from laser-heated nanoparticles. United States: N. p., 2016. Web. doi:10.1063/1.4940992.
Mitrani, J. M., Shneider, M. N., Stratton, B. C., & Raitses, Y. Modeling thermionic emission from laser-heated nanoparticles. United States. https://doi.org/10.1063/1.4940992
Mitrani, J. M., Shneider, M. N., Stratton, B. C., and Raitses, Y. Mon . "Modeling thermionic emission from laser-heated nanoparticles". United States. https://doi.org/10.1063/1.4940992. https://www.osti.gov/servlets/purl/1254732.
@article{osti_1254732,
title = {Modeling thermionic emission from laser-heated nanoparticles},
author = {Mitrani, J. M. and Shneider, M. N. and Stratton, B. C. and Raitses, Y.},
abstractNote = {An adjusted form of thermionic emission is applied to calculate emitted current from laser-heated nanoparticles and to interpret time-resolved laser-induced incandescence (TR-LII) signals. This adjusted form of thermionic emission predicts significantly lower values of emitted current compared to the commonly used Richardson-Dushman equation, since the buildup of positive charge in a laser-heated nanoparticle increases the energy barrier for further emission of electrons. Thermionic emission influences the particle's energy balance equation, which can influence TR-LII signals. Additionally, reports suggest that thermionic emission can induce disintegration of nanoparticle aggregates when the electrostatic Coulomb repulsion energy between two positively charged primary particles is greater than the van der Waals bond energy. Furthermore, since the presence and size of aggregates strongly influences the particle's energy balance equation, using an appropriate form of thermionic emission to calculate emitted current may improve interpretation of TR-LII signals.},
doi = {10.1063/1.4940992},
journal = {Applied Physics Letters},
number = 5,
volume = 108,
place = {United States},
year = {Mon Feb 01 00:00:00 EST 2016},
month = {Mon Feb 01 00:00:00 EST 2016}
}

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