Safe, stable and effective nanotechnology: phase mapping of ZnS nanoparticles

Feigl, C.; Russo, Salvy P.; Barnard, Amanda S.

doi:10.1039/b924697e

Cited by 61 publications

(53 citation statements)

References 119 publications

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“…The kinetics of crystal growth strongly depend on the structure of the material, the properties of the solution, and the nature of the interface between the crystals and the surrounding solution. [16][17][18] In particular, the size dependence of the solid-solid phase transition temperature of ZnS nanoparticles has been the subject of intensive study, 11,19,20 but harnessing the thermodynamic performance of the nanoparticles in a controllable way remains a complicated matter. Phase control in the growth of ZnS crystals is important, because each phase has unique physical properties, for instance, the different phases show different lattice vibration properties and nonlinear optical coefficients.…”

Section: Introductionmentioning

confidence: 99%

Zinc blende versus wurtzite ZnS nanoparticles: control of the phase and optical properties by tetrabutylammonium hydroxide

Porta

Andrés

et al. 2014

Phys. Chem. Chem. Phys.

108

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Section: Introductionmentioning

confidence: 99%

Zinc blende versus wurtzite ZnS nanoparticles: control of the phase and optical properties by tetrabutylammonium hydroxide

Porta

Andrés

et al. 2014

Phys. Chem. Chem. Phys.

108

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“…In nanosized materials, many factors can change the phase transition temperature, including the small size, increased pressure, surface modification, and precipitation rates during the synthesis of the semiconductor. 6,7,8,9,10,11,12 A low temperature preparation of hexagonal ZnS is desirable because the prepared wurtzite nanostructures can meet thermal stability required for reliable optoelectronic device operation, including the incorporation of these materials in flexible substrates such as plastics. The hexagonal structure is also the more desirable structure for its optical properties than the cubic blende structure.…”

Section: Introductionmentioning

confidence: 99%

“…The hexagonal structure is also the more desirable structure for its optical properties than the cubic blende structure. [6][7][8][9][10][11][12] Cubic blende ZnS has been synthesized in a number of ways including by precipitation, by hydrothermal synthesis, and using ultrasonic irradiation. 13,14,15 Using these techniques for large scale synthesis limits the applications of ZnS as a photocatalyst due to the high cost, difficulty in separation, recovery and recycling in industrial environments.…”

Section: Introductionmentioning

confidence: 99%

Novel microwave assisted synthesis of ZnS nanomaterials

Synnott

Seery²,

Hinder

et al. 2013

Nanotechnology

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A novel ambient pressure microwave-assisted technique is developed in which silver and indium modified ZnS is synthesised. The as prepared ZnS is characterised by X-ray diffraction, UV-Vis spectroscopy, X-ray photoelectron spectroscopy and luminescence spectroscopy. This procedure produced crystalline materials with particle sizes below 10 nm. The synthesis technique leads to defects in the crystal which induce mid energy levels in the band gap and lead to indoor light photocatalytic activity. Increasing the amount of silver causes a phase transition from cubic blende to hexagonal phase ZnS. In a comparative study, when the ZnS cubic blende is heated in a conventional chamber furnace, it is completely converted to ZnO at 600 °C. Both cubic blende and hexagonal ZnS show excellent photocatalytic activity under irradiation from a 60 watt light bulb. These ZnS samples also show significantly higher photocatalytic activity compared to the commercially available TiO 2 (Evonik-Degussa P-25).

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“…[4][5][6][7] Zinc sulfide (ZnS) is a suitable semiconductor as a host matrix for a wide variety of dopants on account of its wide energy band gap. The luminescence properties of ZnS particles have been tuned by doping with various transition metals and rare-earth metals.…”

Section: Introductionmentioning

confidence: 99%

Visible emission characteristics from different defects of ZnS nanocrystals

Wang

Shi

Feng

et al. 2011

Phys. Chem. Chem. Phys.

167

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Various sized ZnS nanocrystals were prepared by treatment under H 2 S atmosphere. Resonance Raman spectra indicate that the electron-phonon coupling increases with increasing the size of ZnS. Surface and interfacial defects are formed during the treatment processes. Blue, green and orange emissions are observed for these ZnS. The blue emission (430 nm) from ZnS without treatment is attributed to surface states. ZnS sintered at 873 K displays orange luminescence (620 nm) while ZnS treated at 1173 K shows green emission (515 nm). The green luminescence is assigned to the electron transfer from sulfur vacancies to interstitial sulfur states, and the orange emission is caused by the recombination between interstitial zinc states and zinc vacancies. The lifetimes of the orange emission are much slower than that of the green luminescence and sensitively dependent on the treatment temperature. Controlling defect formation makes ZnS a potential material for photoelectrical applications.

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Safe, stable and effective nanotechnology: phase mapping of ZnS nanoparticles

Cited by 61 publications

References 119 publications

Zinc blende versus wurtzite ZnS nanoparticles: control of the phase and optical properties by tetrabutylammonium hydroxide

Zinc blende versus wurtzite ZnS nanoparticles: control of the phase and optical properties by tetrabutylammonium hydroxide

Novel microwave assisted synthesis of ZnS nanomaterials

Visible emission characteristics from different defects of ZnS nanocrystals

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