Reka bentuk sensor pendar cahaya bintik kuantum ZnCdSe untuk mengesan racun perosak

Translated title of the contribution: Fluorescence sensor design for pesticide detection using ZnCdSe quantum dots

Norhayati Abu Bakar, Ali Umar Akrajas, Muhamad Mat Salleh

Research output: Contribution to journalArticle

Abstract

The pesticides are widely used in the agricultural sector to increase crop production. However, pesticides are considered as harmful chemicals to human health, animal, fish and may cause environmental damage including water pollution. This paper reports a study on the development of a fluorescent sensor system to detect pesticides in water using ZnCdSe quantum dots (QDs) thin film. An optical sensing system was set up, comprises of four components: light source to excite pesticide, sensor chamber that contains the sample of pesticide, fiber optic to drive light from source to sensor chamber, and analyzer system. The dual arms fiber optic probe is for excitation and emission light paths. A glass surface probe is coated with ZnCdSe QDs thin film and attached at the end of the probe arm. ZnCdSe QDs was synthesized at 5 min of growth time using the wet chemical process at 350°C. The detection of pesticide was done by comparing photoluminescence (PL) spectra of the ZnCdSe thin film in deionized water and then in the pesticide solution. The concentration of pesticide solution was prepared in water at 2.5 μg/L to 2500 μg/L. The sensing experiment showed that the PL peak spectrum of ZnCdSe thin film was dropped after dipped in the pesticide solutions compared with PL peak of ZnCdSe dipped in the water. The percentage drop of PL peak was increasing with the increasing of pesticide concentrations and linearly depends on pesticide concentrations.

Original languageMalay
Pages (from-to)1513-1518
Number of pages6
JournalSains Malaysiana
Volume48
Issue number7
DOIs
Publication statusPublished - 1 Jan 2019

Fingerprint

Pesticides
Semiconductor quantum dots
Fluorescence
Sensors
Photoluminescence
Thin films
Fiber optics
Light sources
Water
Water pollution
Deionized water
Light emission
Fish
Crops
Animals
Health
Glass

ASJC Scopus subject areas

  • General

Cite this

Reka bentuk sensor pendar cahaya bintik kuantum ZnCdSe untuk mengesan racun perosak. / Abu Bakar, Norhayati; Akrajas, Ali Umar; Mat Salleh, Muhamad.

In: Sains Malaysiana, Vol. 48, No. 7, 01.01.2019, p. 1513-1518.

Research output: Contribution to journalArticle

Abu Bakar, Norhayati ; Akrajas, Ali Umar ; Mat Salleh, Muhamad. / Reka bentuk sensor pendar cahaya bintik kuantum ZnCdSe untuk mengesan racun perosak. In: Sains Malaysiana. 2019 ; Vol. 48, No. 7. pp. 1513-1518.
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