Atmospheric-pressure dielectric barrier discharge with capillary injection for gas-phase nanoparticle synthesis

Souvik Ghosh, Tianqi Liu, Mihai Bilici, Jonathan Cole, I-Min Huang, David Staack, D Mariotti, R MohanSankaran

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

We present an atmospheric-pressure dielectric barrier discharge (DBD) reactor for gas-phase nanoparticle synthesis. Nickel nanoparticles are synthesized by homogenous nucleation from nickelocene vapor and characterized online by aerosol mobility measurements. The effects of residence time and precursor concentration on particle growth are studied. We find that narrower distributions of smaller particles are produced by decreasing the precursor concentration, in agreement with vapor nucleation theory, but larger particles and aggregates form at higher gas flow rates where the mean residence time should be reduced, suggesting a cooling effect that leads to enhanced particle nucleation. In comparison, incorporating a capillary gas injector to alter the velocity profile is found to significantly reduce particle size and agglomeration. These results suggest that capillary gas injection is a better approach to decreasing the mean residence time and narrowing the residence time distribution for nanoparticle growth by producing a sharp and narrow velocity profile.
LanguageEnglish
Pages314003
JournalJournal of Physics D: Applied Physics
Volume48
Issue number31
Publication statusPublished - 2015

Fingerprint

atmospheric pressure
injection
vapor phases
nanoparticles
synthesis
nucleation
velocity distribution
vapors
gas injection
agglomeration
injectors
gas flow
aerosols
flow velocity
reactors
nickel
cooling
gases

Keywords

  • dielectric barrier discharge
  • atmospheric-pressure plasma
  • nanoparticle
  • homogeneous nucleation
  • aerosol

Cite this

Ghosh, S., Liu, T., Bilici, M., Cole, J., Huang, I-M., Staack, D., ... MohanSankaran, R. (2015). Atmospheric-pressure dielectric barrier discharge with capillary injection for gas-phase nanoparticle synthesis. Journal of Physics D: Applied Physics, 48(31), 314003.
Ghosh, Souvik ; Liu, Tianqi ; Bilici, Mihai ; Cole, Jonathan ; Huang, I-Min ; Staack, David ; Mariotti, D ; MohanSankaran, R. / Atmospheric-pressure dielectric barrier discharge with capillary injection for gas-phase nanoparticle synthesis. In: Journal of Physics D: Applied Physics. 2015 ; Vol. 48, No. 31. pp. 314003.
@article{3c469ee249c2406ab5a90538bfe8ba69,
title = "Atmospheric-pressure dielectric barrier discharge with capillary injection for gas-phase nanoparticle synthesis",
abstract = "We present an atmospheric-pressure dielectric barrier discharge (DBD) reactor for gas-phase nanoparticle synthesis. Nickel nanoparticles are synthesized by homogenous nucleation from nickelocene vapor and characterized online by aerosol mobility measurements. The effects of residence time and precursor concentration on particle growth are studied. We find that narrower distributions of smaller particles are produced by decreasing the precursor concentration, in agreement with vapor nucleation theory, but larger particles and aggregates form at higher gas flow rates where the mean residence time should be reduced, suggesting a cooling effect that leads to enhanced particle nucleation. In comparison, incorporating a capillary gas injector to alter the velocity profile is found to significantly reduce particle size and agglomeration. These results suggest that capillary gas injection is a better approach to decreasing the mean residence time and narrowing the residence time distribution for nanoparticle growth by producing a sharp and narrow velocity profile.",
keywords = "dielectric barrier discharge, atmospheric-pressure plasma, nanoparticle, homogeneous nucleation, aerosol",
author = "Souvik Ghosh and Tianqi Liu and Mihai Bilici and Jonathan Cole and I-Min Huang and David Staack and D Mariotti and R MohanSankaran",
year = "2015",
language = "English",
volume = "48",
pages = "314003",
journal = "Journal of Physics D: Applied Physics",
issn = "0022-3727",
number = "31",

}

Ghosh, S, Liu, T, Bilici, M, Cole, J, Huang, I-M, Staack, D, Mariotti, D & MohanSankaran, R 2015, 'Atmospheric-pressure dielectric barrier discharge with capillary injection for gas-phase nanoparticle synthesis', Journal of Physics D: Applied Physics, vol. 48, no. 31, pp. 314003.

Atmospheric-pressure dielectric barrier discharge with capillary injection for gas-phase nanoparticle synthesis. / Ghosh, Souvik; Liu, Tianqi; Bilici, Mihai; Cole, Jonathan; Huang, I-Min; Staack, David; Mariotti, D; MohanSankaran, R.

In: Journal of Physics D: Applied Physics, Vol. 48, No. 31, 2015, p. 314003.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Atmospheric-pressure dielectric barrier discharge with capillary injection for gas-phase nanoparticle synthesis

AU - Ghosh, Souvik

AU - Liu, Tianqi

AU - Bilici, Mihai

AU - Cole, Jonathan

AU - Huang, I-Min

AU - Staack, David

AU - Mariotti, D

AU - MohanSankaran, R

PY - 2015

Y1 - 2015

N2 - We present an atmospheric-pressure dielectric barrier discharge (DBD) reactor for gas-phase nanoparticle synthesis. Nickel nanoparticles are synthesized by homogenous nucleation from nickelocene vapor and characterized online by aerosol mobility measurements. The effects of residence time and precursor concentration on particle growth are studied. We find that narrower distributions of smaller particles are produced by decreasing the precursor concentration, in agreement with vapor nucleation theory, but larger particles and aggregates form at higher gas flow rates where the mean residence time should be reduced, suggesting a cooling effect that leads to enhanced particle nucleation. In comparison, incorporating a capillary gas injector to alter the velocity profile is found to significantly reduce particle size and agglomeration. These results suggest that capillary gas injection is a better approach to decreasing the mean residence time and narrowing the residence time distribution for nanoparticle growth by producing a sharp and narrow velocity profile.

AB - We present an atmospheric-pressure dielectric barrier discharge (DBD) reactor for gas-phase nanoparticle synthesis. Nickel nanoparticles are synthesized by homogenous nucleation from nickelocene vapor and characterized online by aerosol mobility measurements. The effects of residence time and precursor concentration on particle growth are studied. We find that narrower distributions of smaller particles are produced by decreasing the precursor concentration, in agreement with vapor nucleation theory, but larger particles and aggregates form at higher gas flow rates where the mean residence time should be reduced, suggesting a cooling effect that leads to enhanced particle nucleation. In comparison, incorporating a capillary gas injector to alter the velocity profile is found to significantly reduce particle size and agglomeration. These results suggest that capillary gas injection is a better approach to decreasing the mean residence time and narrowing the residence time distribution for nanoparticle growth by producing a sharp and narrow velocity profile.

KW - dielectric barrier discharge

KW - atmospheric-pressure plasma

KW - nanoparticle

KW - homogeneous nucleation

KW - aerosol

M3 - Article

VL - 48

SP - 314003

JO - Journal of Physics D: Applied Physics

T2 - Journal of Physics D: Applied Physics

JF - Journal of Physics D: Applied Physics

SN - 0022-3727

IS - 31

ER -