Crystalline Si nanoparticles below crystallization threshold: effects of collisional heating in non-thermal atmospheric-pressure microplasmas

S. Askari; I. Levchenko; K. Ostrikov; P. Maguire; D. Mariotti

doi:10.1063/1.4872254

Crystalline Si nanoparticles below crystallization threshold: effects of collisional heating in non-thermal atmospheric-pressure microplasmas

S. Askari^*, I. Levchenko, K. Ostrikov, P. Maguire, D. Mariotti

^*Corresponding author for this work

Design, Manufacturing And Engineering Management

Research output: Contribution to journal › Article › peer-review

70 Citations (Scopus)

Abstract

Nucleation and growth of highly crystalline silicon nanoparticles in atmospheric-pressure low-temperature microplasmas at gas temperatures well below the Si crystallization threshold and within a short (100 μs) period of time are demonstrated and explained. The modeling reveals that collision-enhanced ion fluxes can effectively increase the heat flux on the nanoparticle surface and this heating is controlled by the ion density. It is shown that nanoparticles can be heated to temperatures above the crystallization threshold. These combined experimental and theoretical results confirm the effective heating and structure control of Si nanoparticles at atmospheric pressure and low gas temperatures.

Original language	English
Article number	163103
Journal	Applied Physics Letters
Volume	104
Issue number	16
DOIs	https://doi.org/10.1063/1.4872254
Publication status	Published - 21 Apr 2014

Funding

This work was supported by the Royal Society International Exchange Scheme (IE120884), the Leverhulme International Network (IN-2012-136), and EPSRC (EP/K022237/1). S.A. thanks the financial support of the University of Ulster Vice-Chancellor Studentship. I.L. and K.O. acknowledge financial support from CSIRO and Australian Research Council.

Keywords

electron density
physical quantities
thermodynamic states and processes
Stark effect
Nanoparticle
leptons
silicon compounds
chemical elements
plasmas
fluid mechancis

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10.1063/1.4872254

https://pure.ulster.ac.uk/ws/portalfiles/portal/11436141/1.4872254.pdf

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title = "Crystalline Si nanoparticles below crystallization threshold: effects of collisional heating in non-thermal atmospheric-pressure microplasmas",

abstract = "Nucleation and growth of highly crystalline silicon nanoparticles in atmospheric-pressure low-temperature microplasmas at gas temperatures well below the Si crystallization threshold and within a short (100 μs) period of time are demonstrated and explained. The modeling reveals that collision-enhanced ion fluxes can effectively increase the heat flux on the nanoparticle surface and this heating is controlled by the ion density. It is shown that nanoparticles can be heated to temperatures above the crystallization threshold. These combined experimental and theoretical results confirm the effective heating and structure control of Si nanoparticles at atmospheric pressure and low gas temperatures.",

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AU - Askari, S.

AU - Levchenko, I.

AU - Ostrikov, K.

AU - Maguire, P.

AU - Mariotti, D.

PY - 2014/4/21

Y1 - 2014/4/21

N2 - Nucleation and growth of highly crystalline silicon nanoparticles in atmospheric-pressure low-temperature microplasmas at gas temperatures well below the Si crystallization threshold and within a short (100 μs) period of time are demonstrated and explained. The modeling reveals that collision-enhanced ion fluxes can effectively increase the heat flux on the nanoparticle surface and this heating is controlled by the ion density. It is shown that nanoparticles can be heated to temperatures above the crystallization threshold. These combined experimental and theoretical results confirm the effective heating and structure control of Si nanoparticles at atmospheric pressure and low gas temperatures.

AB - Nucleation and growth of highly crystalline silicon nanoparticles in atmospheric-pressure low-temperature microplasmas at gas temperatures well below the Si crystallization threshold and within a short (100 μs) period of time are demonstrated and explained. The modeling reveals that collision-enhanced ion fluxes can effectively increase the heat flux on the nanoparticle surface and this heating is controlled by the ion density. It is shown that nanoparticles can be heated to temperatures above the crystallization threshold. These combined experimental and theoretical results confirm the effective heating and structure control of Si nanoparticles at atmospheric pressure and low gas temperatures.

KW - electron density

KW - physical quantities

KW - thermodynamic states and processes

KW - Stark effect

KW - Nanoparticle

KW - leptons

KW - silicon compounds

KW - chemical elements

KW - plasmas

KW - fluid mechancis

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VL - 104

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 16

M1 - 163103

ER -

Crystalline Si nanoparticles below crystallization threshold: effects of collisional heating in non-thermal atmospheric-pressure microplasmas

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