Utilizing wall collision broadening of O2absorption line for pore size assessment

Ahmed Al-Saudi; Abdulaziz Aljalal; Watheq Al-Basheer; Khaled Gasmi; Samer Qari

doi:10.1117/12.2565900

Utilizing wall collision broadening of O₂absorption line for pore size assessment

Ahmed Al-Saudi^*, Abdulaziz Aljalal, Watheq Al-Basheer, Khaled Gasmi, Samer Qari

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

The broadening of the P9P9 absorption line of oxygen molecules entrapped in the pores of nanoporous alumina is studied using Gas in Scattering Media Absorption Spectroscopy (GASMAS). A narrow band tunable vertical-cavity surface-emitting laser (VCSEL), with emission peaking around 763 nm, is used to scan over the absorption line of the oxygen A-band. The oxygen line broadening in alpha alumina discs of pore sizes 150 nm, 80 nm and 50 nm, are measured to be 3.8 GHz, 4.2 GHz, and 4.8 GHz, respectively, and compared with the measured open-air oxygen line broadening of 3.3 GHz. The oxygen line broadenings are correlated with studied samples pore sizes and are found to agree well with the line broadenings evaluated using a model based on collisions of confined oxygen molecules with the bulk sample pore walls.

Original language	English
Title of host publication	Novel Optical Systems, Methods, and Applications XXIII
Editors	Cornelius F. Hahlweg, Joseph R. Mulley
Publisher	SPIE
ISBN (Electronic)	9781510637726
DOIs	https://doi.org/10.1117/12.2565900
State	Published - 2020

Publication series

Name	Proceedings of SPIE - The International Society for Optical Engineering
Volume	11483
ISSN (Print)	0277-786X
ISSN (Electronic)	1996-756X

Bibliographical note

Publisher Copyright:
© 2020 SPIE.

Keywords

Alpha alumina
Gas in scattering media absorption spectroscopy
Oxygen line broadening
Wall collision broadening

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Computer Science Applications
Applied Mathematics
Electrical and Electronic Engineering

Access to Document

10.1117/12.2565900

Cite this

Al-Saudi, A., Aljalal, A., Al-Basheer, W., Gasmi, K., & Qari, S. (2020). Utilizing wall collision broadening of O₂absorption line for pore size assessment. In C. F. Hahlweg, & J. R. Mulley (Eds.), Novel Optical Systems, Methods, and Applications XXIII Article 114830Q (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 11483). SPIE. https://doi.org/10.1117/12.2565900

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title = "Utilizing wall collision broadening of O2absorption line for pore size assessment",

abstract = "The broadening of the P9P9 absorption line of oxygen molecules entrapped in the pores of nanoporous alumina is studied using Gas in Scattering Media Absorption Spectroscopy (GASMAS). A narrow band tunable vertical-cavity surface-emitting laser (VCSEL), with emission peaking around 763 nm, is used to scan over the absorption line of the oxygen A-band. The oxygen line broadening in alpha alumina discs of pore sizes 150 nm, 80 nm and 50 nm, are measured to be 3.8 GHz, 4.2 GHz, and 4.8 GHz, respectively, and compared with the measured open-air oxygen line broadening of 3.3 GHz. The oxygen line broadenings are correlated with studied samples pore sizes and are found to agree well with the line broadenings evaluated using a model based on collisions of confined oxygen molecules with the bulk sample pore walls.",

keywords = "Alpha alumina, Gas in scattering media absorption spectroscopy, Oxygen line broadening, Wall collision broadening",

author = "Ahmed Al-Saudi and Abdulaziz Aljalal and Watheq Al-Basheer and Khaled Gasmi and Samer Qari",

note = "Publisher Copyright: {\textcopyright} 2020 SPIE.",

year = "2020",

doi = "10.1117/12.2565900",

language = "English",

series = "Proceedings of SPIE - The International Society for Optical Engineering",

publisher = "SPIE",

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Al-Saudi, A, Aljalal, A , Al-Basheer, W , Gasmi, K & Qari, S 2020, Utilizing wall collision broadening of O₂absorption line for pore size assessment. in CF Hahlweg & JR Mulley (eds), Novel Optical Systems, Methods, and Applications XXIII., 114830Q, Proceedings of SPIE - The International Society for Optical Engineering, vol. 11483, SPIE. https://doi.org/10.1117/12.2565900

Utilizing wall collision broadening of O₂absorption line for pore size assessment. / Al-Saudi, Ahmed; Aljalal, Abdulaziz ; Al-Basheer, Watheq et al.
Novel Optical Systems, Methods, and Applications XXIII. ed. / Cornelius F. Hahlweg; Joseph R. Mulley. SPIE, 2020. 114830Q (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 11483).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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AU - Qari, Samer

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N2 - The broadening of the P9P9 absorption line of oxygen molecules entrapped in the pores of nanoporous alumina is studied using Gas in Scattering Media Absorption Spectroscopy (GASMAS). A narrow band tunable vertical-cavity surface-emitting laser (VCSEL), with emission peaking around 763 nm, is used to scan over the absorption line of the oxygen A-band. The oxygen line broadening in alpha alumina discs of pore sizes 150 nm, 80 nm and 50 nm, are measured to be 3.8 GHz, 4.2 GHz, and 4.8 GHz, respectively, and compared with the measured open-air oxygen line broadening of 3.3 GHz. The oxygen line broadenings are correlated with studied samples pore sizes and are found to agree well with the line broadenings evaluated using a model based on collisions of confined oxygen molecules with the bulk sample pore walls.

AB - The broadening of the P9P9 absorption line of oxygen molecules entrapped in the pores of nanoporous alumina is studied using Gas in Scattering Media Absorption Spectroscopy (GASMAS). A narrow band tunable vertical-cavity surface-emitting laser (VCSEL), with emission peaking around 763 nm, is used to scan over the absorption line of the oxygen A-band. The oxygen line broadening in alpha alumina discs of pore sizes 150 nm, 80 nm and 50 nm, are measured to be 3.8 GHz, 4.2 GHz, and 4.8 GHz, respectively, and compared with the measured open-air oxygen line broadening of 3.3 GHz. The oxygen line broadenings are correlated with studied samples pore sizes and are found to agree well with the line broadenings evaluated using a model based on collisions of confined oxygen molecules with the bulk sample pore walls.

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