skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Local cooling, plasma reheating and thermal pinching induced by single aerosol droplets injected into an inductively coupled plasma

Publication Date:
Sponsoring Org.:
OSTI Identifier:
Grant/Contract Number:
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Spectrochimica Acta. Part B, Atomic Spectroscopy
Additional Journal Information:
Journal Volume: 121; Journal Issue: C; Related Information: CHORUS Timestamp: 2017-10-04 16:14:30; Journal ID: ISSN 0584-8547
Country of Publication:
United Kingdom

Citation Formats

Chan, George C. -Y., and Hieftje, Gary M.. Local cooling, plasma reheating and thermal pinching induced by single aerosol droplets injected into an inductively coupled plasma. United Kingdom: N. p., 2016. Web. doi:10.1016/j.sab.2016.05.006.
Chan, George C. -Y., & Hieftje, Gary M.. Local cooling, plasma reheating and thermal pinching induced by single aerosol droplets injected into an inductively coupled plasma. United Kingdom. doi:10.1016/j.sab.2016.05.006.
Chan, George C. -Y., and Hieftje, Gary M.. 2016. "Local cooling, plasma reheating and thermal pinching induced by single aerosol droplets injected into an inductively coupled plasma". United Kingdom. doi:10.1016/j.sab.2016.05.006.
title = {Local cooling, plasma reheating and thermal pinching induced by single aerosol droplets injected into an inductively coupled plasma},
author = {Chan, George C. -Y. and Hieftje, Gary M.},
abstractNote = {},
doi = {10.1016/j.sab.2016.05.006},
journal = {Spectrochimica Acta. Part B, Atomic Spectroscopy},
number = C,
volume = 121,
place = {United Kingdom},
year = 2016,
month = 7

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1016/j.sab.2016.05.006

Citation Metrics:
Cited by: 1work
Citation information provided by
Web of Science

Save / Share:
  • We used an electrostatic size classification technique to segregate particles of known composition prior to being injected into an inductively coupled plasma mass spectrometer (ICP-MS). Moreover, we counted size-segregated particles with a condensation nuclei counter as well as sampled with an ICP-MS. By injecting particles of known size, composition, and aerosol concentration into the ICP-MS, efficiencies of the order of magnitude aerosol detection were calculated, and the particle size dependencies for volatile and refractory species were quantified. Similar to laser ablation ICP-MS, aerosol detection efficiency was defined as the rate at which atoms were detected in the ICP-MS normalized bymore » the rate at which atoms were injected in the form of particles. This method adds valuable insight into the development of technologies like laser ablation ICP-MS where aerosol particles (of relatively unknown size and gas concentration) are generated during ablation and then transported into the plasma of an ICP-MS. In this study, we characterized aerosol detection efficiencies of volatile species gold and silver along with refractory species aluminum oxide, cerium oxide, and yttrium oxide. Aerosols were generated with electrical mobility diameters ranging from 100 to 1000 nm. In general, it was observed that refractory species had lower aerosol detection efficiencies than volatile species, and there were strong dependencies on particle size and plasma torch residence time. Volatile species showed a distinct transition point at which aerosol detection efficiency began decreasing with increasing particle size. This critical diameter indicated the largest particle size for which complete particle detection should be expected and agreed with theories published in other works. Aerosol detection efficiencies also displayed power law dependencies on particle size. Aerosol detection efficiencies ranged from 10 -5 to 10 -11. Free molecular heat and mass transfer theory was applied, but evaporative phenomena were not sufficient to explain the dependence of aerosol detection on particle diameter. Additional work is needed to correlate experimental data with theory for metal-oxides where thermodynamic property data are sparse relative to pure elements. Finally, when matrix effects and the diffusion of ions inside the plasma were considered, mass loading was concluded to have had an effect on the dependence of detection efficiency on particle diameter.« less
  • A new approach for quantitation in laser ablation-inductively coupled plasma atomic emission spectrometry (LA-ICPAES) is presented. A portion of the laser-ablated sample aerosol is diverted to an aerosol mass monitor to measure variations in the amount of sample ablated and transported to the ICP torch. This provides a normalization for variations in laser ablation efficiency due to changes in laser power and focus at the sample and variations in material transport out of the ablation cell and into the ICP torch. During the laser ablation sampling process, solution standards are nebulized and the aerosol is added to the laser-ablated aerosolmore » to generate a standard addition curve for the analyte being determined. The standard addition procedure corrects for potential plasma-related matrix effects in the ICP emission signal resulting from the ablated sample. The precision of this method, for triplicate analyses for the determination of 16 elements in four glass samples, and the accuracy of this method relative to the nominal glass compositions are both approximately 10%. 19 refs., 4 figs., 4 tabs.« less
  • A mathematical model is developed to simulate the comprehensive systems of platinum nanoparticle synthesis using an argon inductively coupled thermal plasma flow with forced cooling portions. Numerical investigation using the model is conducted to clarify and discuss the effects of several cooling methods on the formation mechanisms of nanoparticles in distinctive thermofluid fields with strong two dimensionality. The computational results show that cooling by a radial gas injection, and a counterflow, engenders the remarkable promotion of nanoparticles.
  • No abstract prepared.
  • Local high-temperature plasma formations produced in a high-current vacuum discharge with an initial stored energy of kJ and initiated by a plasma created by the focused radiation from a pulsed laser are investigated. The collapsing current-carrying plasma is found to split into separate current filaments. A mechanism of current-energy transfer to the plasma in the region where the filaments are linked is proposed on the basis of a model of self-stabilized plasma vortices produced when the current-carrying plasma moves in an external magnetic field. As a confirmation of the mechanism, some results are presented of an investigation of the microwavemore » radiation and accelerated particles from the local high-temperature plasma formation region.« less