2004
DOI: 10.1021/ja048650g
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Low-Temperature Synthesis of Hexagonal (Wurtzite) ZnS Nanocrystals

Abstract: We report a low-temperature (150 degrees C) and simple synthesis of quasi-monodispersed and uniform hexagonal (Wurtzite) ZnS nanocrystals in ethylene glycol medium. The samples structures were characterized with X-ray diffraction technique and transmission electron microscopy. It is believed that ethylene glycol medium plays a key role in forming hexagonal ZnS which is a stable phase at high temperatures.

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Cited by 292 publications
(206 citation statements)
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“…9,10 In both cubic and hexagonal structures, Zn and S atoms are tetrahedrally bonded where the only difference is in the stacking sequence of atomic layers. Nevertheless, with decreasing particle size, the relative stability of two phases changes and low-temperature synthesis of small wurtzite ZnS nanoparticles have been reported, [11][12][13][14] and very recently, Kulkarni et al 15 reported the ethylenediaminemediated wurtzite phase formation in ZnS. Controlled fabrication of nanoparticles with different phases is desirable and necessary, which is however still a great challenge.…”
Section: Introductionmentioning
confidence: 99%
See 1 more Smart Citation
“…9,10 In both cubic and hexagonal structures, Zn and S atoms are tetrahedrally bonded where the only difference is in the stacking sequence of atomic layers. Nevertheless, with decreasing particle size, the relative stability of two phases changes and low-temperature synthesis of small wurtzite ZnS nanoparticles have been reported, [11][12][13][14] and very recently, Kulkarni et al 15 reported the ethylenediaminemediated wurtzite phase formation in ZnS. Controlled fabrication of nanoparticles with different phases is desirable and necessary, which is however still a great challenge.…”
Section: Introductionmentioning
confidence: 99%
“…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%
“…6,7 Thus, one of the most important goals of modern materials research is the development of simple chemical methods for large scale synthesis of nanomaterials with full control of defects and morphology and, in this context, a considerable variety of methods has been reported for the synthesis of ZnS nanocrystals. [8][9][10][11][12][13][14] Some of these methods employ the use of capping agents for the passivation of these nanoscrystals or to activate desired morphologies. [15][16][17] Several reports in the literature describe the conditions required for PL.…”
Section: Introductionmentioning
confidence: 99%
“…The interest in ZnS as the optical material for photonic crystals is determined by its properties: high values of integral transmittance (~0.72) in the range 400-14000 nm and the refractive index (2.3 at a wavelength of 1 µm) [6,7]. In this regard, a large number of works were devoted and dedicated to the synthesis of ZnS [8,9]. Among many problems in the synthesis of new compounds there is one of the most important.…”
Section: Introductionmentioning
confidence: 99%
“…Интерес к ZnS как к оптиче-скому материалу для фотонных кри-сталлов определяется его свойствами: высокими значениями интегрального пропускания (~0,72) в диапазоне 400-14000 нм и коэффициента преломле-ния (2,3 при длине волны 1 мкм) [6,7]. В связи с этим большое количест-во работ посвящалось и посвящает-ся синтезу ZnS [8,9]. Среди многих проблем при синтезе новых соедине-ний существует одна из важнейших -определение скорости протекания превращений в изучаемых системах.…”
Section: Introductionunclassified