Time-resolved imaging of gas phase nanoparticle synthesis by laser ablation

David B. Geohegan; Alex A. Puretzky; Gerd Duscher; Stephen J. Pennycook

doi:10.1063/1.121516

Time-resolved imaging of gas phase nanoparticle synthesis by laser ablation

David B. Geohegan, Alex A. Puretzky, Gerd Duscher, Stephen J. Pennycook

Functional Hybrid Nanomaterials

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

356 Scopus citations

Abstract

The dynamics of nanoparticle formation, transport, and deposition by pulsed laser ablation of c-Si into 1-10 Torr He and Ar gases are revealed by imaging laser-induced photoluminescence and Rayleigh-scattered light from gas-suspended 1-10 nm SiO_x particles. Two sets of dynamic phenomena are presented for times up to 15 s after KrF-laser ablation. Ablation of Si into heavier Ar results in a uniform, stationary plume of nanoparticles, while Si ablation into lighter He results in a turbulent ring of particles which propagates forward at 10 m/s. Nanoparticles unambiguously formed in the gas phase were collected on transmission electron microscope grids for Z-contrast imaging and electron energy loss spectroscopy analysis. The effects of gas flow on nanoparticle formation, photoluminescence, and collection are described.

Original language	English
Pages (from-to)	2987-2989
Number of pages	3
Journal	Applied Physics Letters
Volume	72
Issue number	23
DOIs	https://doi.org/10.1063/1.121516
State	Published - 1998

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10.1063/1.121516

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title = "Time-resolved imaging of gas phase nanoparticle synthesis by laser ablation",

abstract = "The dynamics of nanoparticle formation, transport, and deposition by pulsed laser ablation of c-Si into 1-10 Torr He and Ar gases are revealed by imaging laser-induced photoluminescence and Rayleigh-scattered light from gas-suspended 1-10 nm SiOx particles. Two sets of dynamic phenomena are presented for times up to 15 s after KrF-laser ablation. Ablation of Si into heavier Ar results in a uniform, stationary plume of nanoparticles, while Si ablation into lighter He results in a turbulent ring of particles which propagates forward at 10 m/s. Nanoparticles unambiguously formed in the gas phase were collected on transmission electron microscope grids for Z-contrast imaging and electron energy loss spectroscopy analysis. The effects of gas flow on nanoparticle formation, photoluminescence, and collection are described.",

author = "Geohegan, {David B.} and Puretzky, {Alex A.} and Gerd Duscher and Pennycook, {Stephen J.}",

year = "1998",

doi = "10.1063/1.121516",

language = "English",

volume = "72",

pages = "2987--2989",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics",

number = "23",

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T1 - Time-resolved imaging of gas phase nanoparticle synthesis by laser ablation

AU - Geohegan, David B.

AU - Puretzky, Alex A.

AU - Duscher, Gerd

AU - Pennycook, Stephen J.

PY - 1998

Y1 - 1998

N2 - The dynamics of nanoparticle formation, transport, and deposition by pulsed laser ablation of c-Si into 1-10 Torr He and Ar gases are revealed by imaging laser-induced photoluminescence and Rayleigh-scattered light from gas-suspended 1-10 nm SiOx particles. Two sets of dynamic phenomena are presented for times up to 15 s after KrF-laser ablation. Ablation of Si into heavier Ar results in a uniform, stationary plume of nanoparticles, while Si ablation into lighter He results in a turbulent ring of particles which propagates forward at 10 m/s. Nanoparticles unambiguously formed in the gas phase were collected on transmission electron microscope grids for Z-contrast imaging and electron energy loss spectroscopy analysis. The effects of gas flow on nanoparticle formation, photoluminescence, and collection are described.

AB - The dynamics of nanoparticle formation, transport, and deposition by pulsed laser ablation of c-Si into 1-10 Torr He and Ar gases are revealed by imaging laser-induced photoluminescence and Rayleigh-scattered light from gas-suspended 1-10 nm SiOx particles. Two sets of dynamic phenomena are presented for times up to 15 s after KrF-laser ablation. Ablation of Si into heavier Ar results in a uniform, stationary plume of nanoparticles, while Si ablation into lighter He results in a turbulent ring of particles which propagates forward at 10 m/s. Nanoparticles unambiguously formed in the gas phase were collected on transmission electron microscope grids for Z-contrast imaging and electron energy loss spectroscopy analysis. The effects of gas flow on nanoparticle formation, photoluminescence, and collection are described.

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U2 - 10.1063/1.121516

DO - 10.1063/1.121516

M3 - Article

AN - SCOPUS:0000468427

SN - 0003-6951

VL - 72

SP - 2987

EP - 2989

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 23

ER -

Time-resolved imaging of gas phase nanoparticle synthesis by laser ablation

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