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	Luminescence technique for studying the growth of AgInS<sub>2</sub> quantum dots</div>

Ahmad K. Ahmad, Ammar H. Mohammed, Alexander A. Skaptsov

doi:10.17586/2226-1494-2022-22-6-1078-1084

2022 , VOLUME 22, NUMBER 6 ( november-december )

ISSN 2226-1494 (print), ISSN 2500-0373 (online)

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Nikiforov
Vladimir O.
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doi: 10.17586/2226-1494-2022-22-6-1078-1084

Luminescence technique for studying the growth of AgInS₂ quantum dots

A. K. Ahmad, A. H. Mohammed, A. A. Skaptsov

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Ahmad A.K., Mohammed A.H., Skaptsov A.A. Luminescence technique for studying the growth of AgInS2 quantum dots. Scientific and Technical Journal of Information Technologies, Mechanics and Optics, 2022, vol. 22, no. 6, pp. 1078–1084. doi: 10.17586/2226-1494-2022-22-6-1078-1084

Abstract

Although nanoparticle production techniques are well-known, getting nanoparticles with specific characteristics that enable their application as biosensors is an entirely other problem. Many issues occur as a result of employing the method for producing repeatable and time-stable nanostructures. We created AgInS2 nanoparticles as colloidal quantum dots in a variety of methods to test the efficiency of the synthesis process on the optical characteristics of the nanoparticles, as well as their size, composition, absorption, and luminescence spectra. The capillary electrophoresis (CE) approach for AgInS2 production was employed, with modifications in solvent and temperature, to get nanocrystal (NC) particles. The researchers discovered that Ag accumulation in the InS lattice promotes deformation which leads to structural defects. Consequently, the direction of a nanoparticle light band may now be changed. The features of mixed AgInS2 nanoparticles have been examined with respect to different fabrication procedures, surface stability, and metal impurity incorporation. One band dominates in the luminescence spectra of AgxIn1–xS2 nanoparticles. The relationship between the stoichiometric ratio, luminescence amplitude, line width, and the maximum wavelength is investigated. The average size of the received nanocrystals was determined using dynamic light scattering studies. The computed nanoparticle diameter range has an average particle size of 3–3.5 nm.

Keywords: AgInS2, quantum dot, luminescence, synthesis of nanocrystalline particles, biosensors

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