A stannic dioxide sensor array system for organophosphorus insecticides detection

Wei, Long; Salleh, Muhamad Mat

doi:10.1109/smelec.2004.1620964

Cited by 1 publication

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“…The use of enzymes, enzyme immunoassays (EIA) and solid phase technology has brought a great interest of these techniques [14][15]. In these techniques, colorant of labels has been applied as detecting agents in immunoassays such as enzymes, radioactive tracers, chemiluminescent and fluorescent labels, metal atom and sols, stable free radicals, latexes and bacteriophage [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Portable surface-enhanced Raman spectroscopy for insecticide detection using silver nanorod film fabricated by magnetron sputtering

et al. 2011

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In order to increase agricultural productivity, several countries heavily rely on deadly insecticides, known to be toxic to most living organisms and thus significantly affect the food chain. The most obvious impact is to human beings who come into contact, or even consume, pesticide-exposed crops. This work hence focused on an alternative method for insecticide detection at trace concentration under field tests. We proposed a compact Raman spectroscopy system, which consisted of a portable Raman spectroscope, and a surface-enhanced Raman scattering (SERS) substrate, developed for the purpose of such application, on a chip. For the selected portable Raman spectroscope, a laser diode of 785 nm for excitation and a thermoelectric-cooled CCD spectrometer for detection were used. The affordable SERS substrates, with a structure of distributed silver nanorods, were however fabricated by a low-energy magnetron sputtering system. Based on an oblique-angle deposition technique, several deposition parameters, which include a deposition angle, an operating pressure and a substrate rotation, were investigated for their immediate effects on the formation of the nanorods. Trace concentration of organophosphorous chemical agents, including methyl parathion, chlorpyrifos, and malathion, adsorbed on the fabricated SERS substrates were analyzed. The obtained results indicated a sensitive detection for the trace organic analyses of the toxic chemical agents from the purposed portable SERS system.

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Section: Introductionmentioning

confidence: 99%

Portable surface-enhanced Raman spectroscopy for insecticide detection using silver nanorod film fabricated by magnetron sputtering

et al. 2011

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A stannic dioxide sensor array system for organophosphorus insecticides detection

Abstract: This paper reports on a study using the doped SnO2 thin films array as sensor to detect Organophosphorus insecticides. In this paper, the sensor array consisted of six different SnO2 sensing elements doped with TiO2, PbO, CuO, CoO, NiO and Fe2O3 respectively. All of the sensing

Cited by 1 publication

References 4 publications

Portable surface-enhanced Raman spectroscopy for insecticide detection using silver nanorod film fabricated by magnetron sputtering

Portable surface-enhanced Raman spectroscopy for insecticide detection using silver nanorod film fabricated by magnetron sputtering

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