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Title: Modeling thermionic emission from laser-heated nanoparticles

Journal Article · · Applied Physics Letters
DOI:https://doi.org/10.1063/1.4940992· OSTI ID:1254732

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.

Research Organization:
Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-09CH11466
OSTI ID:
1254732
Alternate ID(s):
OSTI ID: 1236525
Report Number(s):
PPPL-5209; APPLAB
Journal Information:
Applied Physics Letters, Vol. 108, 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; ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 20 works
Citation information provided by
Web of Science

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Cited By (6)

Laser-induced incandescence on metal nanoparticles: validity of the Rayleigh approximation journal October 2019
Predicting the heat of vaporization of iron at high temperatures using time-resolved laser-induced incandescence and Bayesian model selection journal March 2018
Characterization of the state of nanoparticle aggregation in non-equilibrium plasma synthesis systems journal July 2018
Growth of nanoparticles in dynamic plasma journal June 2019
Laser-induced atomic emission of silicon nanoparticles during laser-induced heating journal January 2017
Synthesis of nanoparticles in carbon arc: measurements and modeling journal May 2018

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