Optical gas sensing selectivity property of ruthenium (II)-metalloporphyrins Langmuir-Blodgett films

Ali Umar Akrajas, Muhamad Mat Salleh, Muhammad Yahaya

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

This paper reports the study of the selectivity property of a metalloporphyrins derivative Langmuir-Blodgett thin film, n-octaethyl porphine ruthenium (II) carbonyl (RuOEPCO), to several organic gas samples, namely the saturated vapor of acetone, 2-propanol, ethanol and cyclohexane. The sensing sensitivity was based on the change in the optical property of the film upon exposure to the gas samples that was measured at a particular wavelength, λ = 514 nm, of the light source. It was observed that the thin film exhibited excellent selectivity property to the gas samples by presenting clear differences amongst its responses. The selectivity property of the thin film was found to depend on the structure of the gaseous molecules of which the highest sensitivity was shown for the gaseous molecules with planar structure, such as cyclohexane. The mechanism for the thin films-gas interaction that promotes the selectivity characteristic is proposed.

Original languageEnglish
Pages (from-to)53-56
Number of pages4
JournalCurrent Applied Physics
Volume8
Issue number1
DOIs
Publication statusPublished - Jan 2008

Fingerprint

Metalloporphyrins
Ruthenium
Langmuir Blodgett films
Langmuir-Blodgett films
ruthenium
Gases
selectivity
Thin films
Cyclohexane
thin films
gases
cyclohexane
Molecules
2-Propanol
sensitivity
planar structures
Propanol
Acetone
acetone
Light sources

Keywords

  • Electronic nose
  • Gas sensor
  • Metalloporphyrins
  • Optical sensing
  • Selectivity

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Materials Science (miscellaneous)

Cite this

Optical gas sensing selectivity property of ruthenium (II)-metalloporphyrins Langmuir-Blodgett films. / Akrajas, Ali Umar; Mat Salleh, Muhamad; Yahaya, Muhammad.

In: Current Applied Physics, Vol. 8, No. 1, 01.2008, p. 53-56.

Research output: Contribution to journalArticle

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