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Growth and Characterizations of Rhenium Disulfide (ReS2) Single Crystals
Physica Status Solidi (A) - Applications and Materials Science ( IF 2 ) Pub Date : 2021-04-01 , DOI: 10.1002/pssa.202000687
Atriy Ghetiya 1 , Sunil H. Chaki 1, 2 , Ankurkumar J. Khimani 1 , Anilkumar B. Hirpara 1 , Rohitkumar M. Kannaujiya 1 , Shivam Patel 1 , Milind P. Deshpande 1
Affiliation  

Rhenium disulfide (ReS2) single crystals are grown by chemical vapor transport technique. Powder X-ray diffraction analysis of the single crystals shows them to possess ReS2 phase with triclinic unit cell structure. Energy dispersive analysis of X-rays shows the crystals to be slightly rich in sulfur and deficient in rhenium. The optical bandgap obtained of the as-grown single crystals is 1.35 eV. The surface morphology study done by scanning electron microscopy shows that the crystal surface to be flat with layer edges, such observation states that the growth mechanism of crystal have happened by mechanism of sheet spreading. The transmission and diffraction mode electron microscopy shows the single crystals to be layered and crystalline, respectively. The Raman peaks are well assigned to the ReS2. Thermogravimetric and differential thermogravimetric analysis shows the single crystals to disintegrate by two steps. The differential thermal analysis shows that the ReS2 possesses initial endothermic followed by exothermic nature for fast heating rates. In case of a slow heating rate of 10 K min−1, other than endothermic followed by exothermic, the end temperature range shows endothermic nature. The kinetic parameters determined by Kissinger relation shows the single-crystal samples to disintegrate at a higher temperature range.

中文翻译:

二硫化铼 (ReS2) 单晶的生长和表征

二硫化铼 (ReS 2 ) 单晶是通过化学蒸汽传输技术生长的。单晶的粉末 X 射线衍射分析表明它们具有 ReS 2具有三斜晶胞结构的相。X 射线的能量色散分析显示晶体略富含硫而缺乏铼。生长的单晶获得的光学带隙为 1.35 eV。扫描电子显微镜的表面形貌研究表明,晶体表面平坦,有层边缘,这种观察表明晶体的生长机制是通过片状扩展机制发生的。透射和衍射模式电子显微镜显示单晶分别为分层和结晶。拉曼峰很好地归于 ReS 2。热重分析和差示热重分析显示单晶通过两步分解。差热分析表明,ReS2具有初始吸热和快速加热速率的放热性质。在缓慢加热速率为 10 K min -1 的情况下,除了吸热后放热外,最终温度范围显示吸热性质。Kissinger 关系确定的动力学参数表明单晶样品在较高的温度范围内分解。
更新日期:2021-06-03
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