Optical sensing of capsicum aroma using four porphyrins derivatives thin films

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

The Langmuir-Blodgett thin films of n-tetraphenyl porphine iron (III) chloride, n-tetraphenyl porphine manganese (III) chloride, n-tetrakis (4-methoxyphenyl) porphine cobalt (II) and n-octaethyl porphine cobalt (II) mixed with arachidic acid were used as sensing elements for optical detection of capsicum (chili) aroma. The sensing sensitivity of aroma was based on changes of optical absorption of the films taken at four wavelengths i.e. 646, 615, 601 and 585 nm. The responses of the films upon aroma exposure were fast and recoverable. The patterns of the absorption changes were able to distinguish three capsicum samples; dried capsicum annum, fresh capsicum annum and capsicum minimum.

Original languageEnglish
Pages (from-to)162-165
Number of pages4
JournalThin Solid Films
Volume417
Issue number1-2
DOIs
Publication statusPublished - 30 Sep 2002

Fingerprint

Porphyrins
porphyrins
Chlorides
Cobalt
Derivatives
Thin films
cobalt
Manganese
thin films
chlorides
Light absorption
Iron
Wavelength
Acids
manganese
optical absorption
iron
acids
sensitivity
wavelengths

Keywords

  • Capsicum aroma
  • Gas sensor
  • Langmuir-Blodgett films
  • Optical sensing
  • Porphyrins

ASJC Scopus subject areas

  • Surfaces, Coatings and Films
  • Condensed Matter Physics
  • Surfaces and Interfaces

Cite this

Optical sensing of capsicum aroma using four porphyrins derivatives thin films. / Mat Salleh, Muhamad; Akrajas, Ali Umar; Yahaya, Muhammad.

In: Thin Solid Films, Vol. 417, No. 1-2, 30.09.2002, p. 162-165.

Research output: Contribution to journalArticle

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