Investigation of water dynamics in nanoporous silica using the Gas in Scattering Media Absorption Spectroscopy (GASMAS) technique

Okky Maryana*, Abdulaziz Aljalal, Sameer Qari, Watheq Al-Basheer, Khaled Gasmi, Ayu Wahyuni, Muhammad Tahir

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

This study utilized the Gas in Scattering Media Absorption Spectroscopy (GASMAS) technique to examine the diffusion dynamics of water vapor in commercial mesoporous silica MCM-41 and SBA-15. The GASMAS technique employed an innovative semiconductor laser configuration, utilizing a tunable diode laser at 936 nm to facilitate real-time monitoring of water vapor absorption. This approach is straightforward and economical, yielding localized insights into diffusion behavior. Our findings indicate a notably slow time constant rate, influenced by hydrogen bonding interactions with pore walls, size, and relative humidity.

Original languageEnglish
Title of host publicationOptical Sensors 2025
EditorsFrancesco Baldini, Jiri Homola, Robert A. Lieberman
PublisherSPIE
ISBN (Electronic)9781510688506
DOIs
StatePublished - 2025
EventOptical Sensors 2025 - Prague, Czech Republic
Duration: 7 Apr 202510 Apr 2025

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume13527
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceOptical Sensors 2025
Country/TerritoryCzech Republic
CityPrague
Period7/04/2510/04/25

Bibliographical note

Publisher Copyright:
© 2025 SPIE. All rights reserved.

Keywords

  • GASMAS
  • Laser
  • Silica
  • Water

ASJC Scopus subject areas

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

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