Microwave-assisted low temperature synthesis of wurtzite ZnS quantum dots

Shahid, Robina; Toprak, Muhammet S.; Muhammed, Mamoun

doi:10.1016/j.jssc.2012.01.007

Cited by 16 publications

(7 citation statements)

References 27 publications

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“…[63] Recently, another method called microwave-assisted solvothermal has been adopted which has superior advantages such as low reaction temperature, fast preparation time, and ability to well control of particle sizes and accumulation process. [64] ZnS nanoparticles have been prepared using microwave irradiation by Yao et al, [65] microwave-assisted low temperature by Shahid et al, [66] microwave assisted chemical route by Navaneethan et al, [67] and microwave-assisted solvothermal by La Porta et al [50] Doping ZnS nanoparticles with elements play a major role in changing the structure of ZnS and introducing new impurity ions that can work as traps for electrons and holes, and thus enhancing its structural, optical and electrical properties. [68] For instance, Yang et al [69] prepared doped and undoped ZnS nanoparticles using microwave method and Cu doped ZnS nanoparticles has been prepared using solvothermal approach as reported by Chaliha et al [70] To the best of our knowledge, such techniques have not been used to prepare doped ZnS ML materials which may be taken for consideration for future researches.…”

Section: Microwave and Solvothermal Methodsmentioning

confidence: 99%

“…[ 63 ] Recently, another method called microwave‐assisted solvothermal has been adopted which has superior advantages such as low reaction temperature, fast preparation time, and ability to well control of particle sizes and accumulation process. [ 64 ] ZnS nanoparticles have been prepared using microwave irradiation by Yao et al., [ 65 ] microwave‐assisted low temperature by Shahid et al., [ 66 ] microwave assisted chemical route by Navaneethan et al., [ 67 ] and microwave‐assisted solvothermal by La Porta et al. [ 50 ] Doping ZnS nanoparticles with elements play a major role in changing the structure of ZnS and introducing new impurity ions that can work as traps for electrons and holes, and thus enhancing its structural, optical and electrical properties.…”

Section: Design and Synthesis Of Zns ML Compoundsmentioning

confidence: 99%

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Recent Advances in Mechanoluminescence of Doped Zinc Sulfides

Qasem

Xiong

et al. 2021

Laser & Photonics Reviews

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Mechanoluminescence (ML) is the light generation of a material under mechanical stimuli. For more than 400 years, many compounds including inorganic and organic materials present this phenomenon. The general mechanism for the ML emission is the stress‐induced electrification effect combined with the piezoelectric field that lead to trapping and detrapping of the charge carriers. However, an in‐depth investigation and research are required to understand and hypothesize the ML mechanisms and optimum design and synthesis methods for better ML properties. Among the most common materials possessing this phenomenon is the zinc sulfide (ZnS) compounds that show high luminescence intensity and reproducibility. Such properties make them best candidates to be used in potential applications such as light and display devices, stress sensors, and human health monitoring devices. Therefore, this minireview focuses on the recent development and progress in doped ZnS ML compounds, including mechanism, design and synthesis, and the practical applications of such materials.

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Section: Microwave and Solvothermal Methodsmentioning

confidence: 99%

Section: Design and Synthesis Of Zns ML Compoundsmentioning

confidence: 99%

Recent Advances in Mechanoluminescence of Doped Zinc Sulfides

Qasem

Xiong

et al. 2021

Laser & Photonics Reviews

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“…Since then, numerous investigations have been carried out to synthesize colloidal semi-conductors (NCs), and the interest continues to increase [4][5][6][7][8][9]. Zinc sulphide is one of the important II-VI semi-conductors and has received wide attention.…”

Section: Introductionmentioning

confidence: 99%

“…The synthesis of nanoparticles using a green chemical route is an approach which has been receiving increasing attention [9]. Laser irradiation as a method of nanoparticle synthesis was initially introduced into materials chemistry in the synthesis of nanoparticles of noble metals via ablation techniques [25,26], and this method has also been extended to the preparation of compound nanocrystalline materials [27,28].…”

Section: Introductionmentioning

confidence: 99%

Laser-assisted synthesis, and structural and thermal properties of ZnS nanoparticles stabilised in polyvinylpyrrolidone

Onwudiwe

Krüger

Jordaan

et al. 2014

Applied Surface Science

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Research Highlights-Zinc sulphide (ZnS) nanoparticles were synthesised by laser irradiation -The structural and morphological properties of the prepared samples were analysed -Larger particles were obtained by using Na 2 S instead of TAA as the sulphur source.-Phonon softening and line broadening of the peaks were observed -Size reduction occurred in the samples obtained from both sources Graphical Abstract AbstractZinc sulphide (ZnS) nanoparticles have been synthesised by a green approach involving laser irradiation of an aqueous solution of zinc acetate (Znac 2 ) and sodium sulphide (Na 2 S·9H 2 O) or thioacetamide (TAA) in polyvinylpyrrolidone (PVP). The structural and morphological properties of the prepared samples were analysed using a transmission electron microscope, TEM, a high resolution transmission electron microscope, HRTEM, X-ray diffraction, and Raman spectroscopy.The thermal properties were studied using a simultaneous thermal analyser (SDTA). Better dispersed and larger particles were obtained by using sodium sulphide (Na 2 S) instead of TAA as the sulphur source. X-ray diffraction (XRD) analyses and Raman measurement show that the particles have a cubic structure, which is usually a low temperature phase of ZnS. There were phonon softening and line broadening of the peaks which are attributed to the phonon confinement effect. The average crystallite size of the ZnS nanoparticles estimated from the XRD showed a reduction in size from 13.62 to 10.42 nm for samples obtained from Na 2 S, and 9.13 to The absorption spectra showed that the nanoparticles exhibit quantum confinement effects.

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“…The semiconductor nanoparticles have optical and electrical properties, which are much different from those of bulk materials, and the properties of nanomaterials arise from the quantum confinement effect [8][9][10][11]. The nanocrystalline semiconductor particles with size smaller than 15nm, the size range corresponds to the regime of quantum confinement, for which the spatial extent of the electronic wave function is comparable with the particle size [12][13].…”

Section: Introductionmentioning

confidence: 99%