Pulsed laser heating of soot: Morphological changes

Randy L. Vander Wal; Mun Y. Choi

doi:10.1016/S0008-6223(98)00169-9

Pulsed laser heating of soot: Morphological changes

Randy L. Vander Wal
, Mun Y. Choi

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

130 Scopus citations

Abstract

Pulsed laser heating of carbon soot is used here to achieve heating in excess of 10¹¹ Ks^-1, cooling rates on the order of 10⁹S^-1 and total integrated times at elevated temperature of ca 1 milliseconds. To resolve detailed morphological changes induced in the soot by pulsed high intensity laser light, high resolution transmission electron microscopy and selected area electron diffraction are used to examine the laser-heated soot. Partial graphitization, formation of hollow particles and the average number of graphitic planes formed within soot primary particles upon high intensity pulsed laser heating are explained via a thermal annealing mechanism. This mechanism is discussed in the context of the initial physical structure of the soot.

Original language	English (US)
Pages (from-to)	231-239
Number of pages	9
Journal	Carbon
Volume	37
Issue number	2
DOIs	https://doi.org/10.1016/S0008-6223(98)00169-9
State	Published - 1999

All Science Journal Classification (ASJC) codes

General Chemistry
General Materials Science

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10.1016/S0008-6223(98)00169-9

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@article{299d828ff0744c94b85c29d203cc634e,

title = "Pulsed laser heating of soot: Morphological changes",

abstract = "Pulsed laser heating of carbon soot is used here to achieve heating in excess of 1011 Ks-1, cooling rates on the order of 109S-1 and total integrated times at elevated temperature of ca 1 milliseconds. To resolve detailed morphological changes induced in the soot by pulsed high intensity laser light, high resolution transmission electron microscopy and selected area electron diffraction are used to examine the laser-heated soot. Partial graphitization, formation of hollow particles and the average number of graphitic planes formed within soot primary particles upon high intensity pulsed laser heating are explained via a thermal annealing mechanism. This mechanism is discussed in the context of the initial physical structure of the soot.",

author = "\{Vander Wal\}, \{Randy L.\} and Choi, \{Mun Y.\}",

note = "Funding Information: When this work was performed, RVW was employed by Nyma Inc. through NASA Contract No. NAS3-27186. MYC, gratefully acknowledges support from The Ohio Aerospace Institute through the NASA–ASME Summer Faculty Fellow Program. Special thanks are extended to Professor Vinayak Dravid of Northwestern University for performing the HRTEM and SAED analyses and for informative discussions. ",

year = "1999",

doi = "10.1016/S0008-6223(98)00169-9",

language = "English (US)",

volume = "37",

pages = "231--239",

journal = "Carbon",

issn = "0008-6223",

publisher = "Elsevier Ltd",

number = "2",

}

TY - JOUR

T1 - Pulsed laser heating of soot

T2 - Morphological changes

AU - Vander Wal, Randy L.

AU - Choi, Mun Y.

N1 - Funding Information: When this work was performed, RVW was employed by Nyma Inc. through NASA Contract No. NAS3-27186. MYC, gratefully acknowledges support from The Ohio Aerospace Institute through the NASA–ASME Summer Faculty Fellow Program. Special thanks are extended to Professor Vinayak Dravid of Northwestern University for performing the HRTEM and SAED analyses and for informative discussions.

PY - 1999

Y1 - 1999

N2 - Pulsed laser heating of carbon soot is used here to achieve heating in excess of 1011 Ks-1, cooling rates on the order of 109S-1 and total integrated times at elevated temperature of ca 1 milliseconds. To resolve detailed morphological changes induced in the soot by pulsed high intensity laser light, high resolution transmission electron microscopy and selected area electron diffraction are used to examine the laser-heated soot. Partial graphitization, formation of hollow particles and the average number of graphitic planes formed within soot primary particles upon high intensity pulsed laser heating are explained via a thermal annealing mechanism. This mechanism is discussed in the context of the initial physical structure of the soot.

AB - Pulsed laser heating of carbon soot is used here to achieve heating in excess of 1011 Ks-1, cooling rates on the order of 109S-1 and total integrated times at elevated temperature of ca 1 milliseconds. To resolve detailed morphological changes induced in the soot by pulsed high intensity laser light, high resolution transmission electron microscopy and selected area electron diffraction are used to examine the laser-heated soot. Partial graphitization, formation of hollow particles and the average number of graphitic planes formed within soot primary particles upon high intensity pulsed laser heating are explained via a thermal annealing mechanism. This mechanism is discussed in the context of the initial physical structure of the soot.

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DO - 10.1016/S0008-6223(98)00169-9

M3 - Article

AN - SCOPUS:0032631735

SN - 0008-6223

VL - 37

SP - 231

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JO - Carbon

JF - Carbon

IS - 2

ER -

Pulsed laser heating of soot: Morphological changes

Abstract

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