Observation of Combined Effect of Temperature and Pressure on Cubic to Hexagonal Phase Transformation in ZnS at the Nanoscale


Autoria(s): Tiwary, CS; Saha, S; Kumbhakar, P; Chattopadhyay, K
Data(s)

2014

Resumo

The temperature of allotropic phase transformation in ZnS (cubic to wurtzite) changes with pressure and particle size. In this paper we have explored the interrelation among these through a detailed study of ZnS powders obtained by a temperature-controlled high energy milling process. By employing the combined effect of temperature and pressure in an indigenously built cryomill, we have demonstrated a large-scale, low-temperature synthesis of wurtzite ZnS nanoparticles. The synthesized products have been characterized for their phase and microstructure by the use of X-ray diffraction and transmission electron microscopic techniques. Further, it has been demonstrated that the synthesized materials exhibit photoluminescence emissions in the UV-visible region with an unusual doublet pattern due to the presence of both cubic and hexagonal wurtzite domains in the same particles. By further fine-tuning the processing conditions, it may be possible to achieve controlled defect related photoluminescence emissions from the ZnS nanoparticles.

Formato

application/pdf

Identificador

http://eprints.iisc.ernet.in/50027/1/cry_gro_des_14-9_4240_2014.pdf

Tiwary, CS and Saha, S and Kumbhakar, P and Chattopadhyay, K (2014) Observation of Combined Effect of Temperature and Pressure on Cubic to Hexagonal Phase Transformation in ZnS at the Nanoscale. In: CRYSTAL GROWTH & DESIGN, 14 (9). pp. 4240-4246.

Publicador

AMER CHEMICAL SOC

Relação

http://dx.doi.org/ 10.1021/cg500657e

http://eprints.iisc.ernet.in/50027/

Palavras-Chave #Materials Engineering (formerly Metallurgy)
Tipo

Journal Article

PeerReviewed