Phase transition at low fluences in laser desorption of organic solids: a molecular dynamics study

Prasad B.S. Kodali; Leonid V. Zhigilei; Barbara J. Garrison

doi:10.1016/S0168-583X(99)00199-8

Phase transition at low fluences in laser desorption of organic solids: a molecular dynamics study

Prasad B.S. Kodali, Leonid V. Zhigilei, Barbara J. Garrison

Research output: Contribution to journal › Conference article › peer-review

9 Scopus citations

Abstract

Molecular dynamics of a short pulse laser irradiation of a molecular crystal are performed to investigate the dependence of the mechanism of ejection on laser fluence. We find that at low laser fluences molecules are desorbed from a thin surface layer of solid sample. An increase in the laser fluence leads to the melting of the surface region and desorption occurs from an overheated melted state. An additional increase of the fluence leads to the ablation when the laser-induced pressure and phase explosion of the overheated liquid drives a collective ejection of a significant volume of irradiated material.

Original language	English (US)
Pages (from-to)	167-171
Number of pages	5
Journal	Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume	153
Issue number	1-4
DOIs	https://doi.org/10.1016/S0168-583X(99)00199-8
State	Published - Jun 1999
Event	Proceedings of the 1998 4th International Conference on Computer Simulation of Radiation Effects in Solids (COSIRES) - Okayama, Jpn Duration: Sep 15 1998 → Sep 19 1998

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics
Instrumentation

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10.1016/S0168-583X(99)00199-8

Cite this

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title = "Phase transition at low fluences in laser desorption of organic solids: a molecular dynamics study",

abstract = "Molecular dynamics of a short pulse laser irradiation of a molecular crystal are performed to investigate the dependence of the mechanism of ejection on laser fluence. We find that at low laser fluences molecules are desorbed from a thin surface layer of solid sample. An increase in the laser fluence leads to the melting of the surface region and desorption occurs from an overheated melted state. An additional increase of the fluence leads to the ablation when the laser-induced pressure and phase explosion of the overheated liquid drives a collective ejection of a significant volume of irradiated material.",

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Phase transition at low fluences in laser desorption of organic solids : a molecular dynamics study. / Kodali, Prasad B.S.; Zhigilei, Leonid V.; Garrison, Barbara J.

In: Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, Vol. 153, No. 1-4, 06.1999, p. 167-171.

Research output: Contribution to journal › Conference article › peer-review

TY - JOUR

T1 - Phase transition at low fluences in laser desorption of organic solids

T2 - Proceedings of the 1998 4th International Conference on Computer Simulation of Radiation Effects in Solids (COSIRES)

AU - Kodali, Prasad B.S.

AU - Zhigilei, Leonid V.

AU - Garrison, Barbara J.

PY - 1999/6

Y1 - 1999/6

N2 - Molecular dynamics of a short pulse laser irradiation of a molecular crystal are performed to investigate the dependence of the mechanism of ejection on laser fluence. We find that at low laser fluences molecules are desorbed from a thin surface layer of solid sample. An increase in the laser fluence leads to the melting of the surface region and desorption occurs from an overheated melted state. An additional increase of the fluence leads to the ablation when the laser-induced pressure and phase explosion of the overheated liquid drives a collective ejection of a significant volume of irradiated material.

AB - Molecular dynamics of a short pulse laser irradiation of a molecular crystal are performed to investigate the dependence of the mechanism of ejection on laser fluence. We find that at low laser fluences molecules are desorbed from a thin surface layer of solid sample. An increase in the laser fluence leads to the melting of the surface region and desorption occurs from an overheated melted state. An additional increase of the fluence leads to the ablation when the laser-induced pressure and phase explosion of the overheated liquid drives a collective ejection of a significant volume of irradiated material.

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VL - 153

SP - 167

EP - 171

JO - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms

JF - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms

SN - 0168-583X

IS - 1-4

Y2 - 15 September 1998 through 19 September 1998

ER -

Phase transition at low fluences in laser desorption of organic solids: a molecular dynamics study

Abstract

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