Spherulitic crystallization of β-In2Te3 by physical vapour deposition

✍ Scribed by P. M. Reshmi; A. G. Kunjomana; K. A. Chandrasekharan

• Publisher: John Wiley and Sons
• Year: 2011
• Tongue: English
• Weight: 206 KB
• Volume: 46
• Category: Article
• ISSN: 0232-1300
• DOI: 10.1002/crat.201000183

✦ Synopsis

Different morphologies of indium telluride (In 2 Te 3 ) including novel spherulites were crystallized using the physical vapour deposition (PVD) method, by varying the difference in the growth and source zone temperature (ΔT) of a dual zone horizontal furnace assembled indigenously. Whiskers and kinked needles of In 2 Te 3 were grown at ΔT = 250 K and 300 K respectively, maintaining the growth zone at 500 °C. At high supersaturation (ΔT = 400 K), spherulitic crystals were obtained. The stoichiometric composition of these crystals has been confirmed using energy dispersive analysis by x-rays (EDAX). The structure of β-In 2 Te 3 spherulitic crystals is identified as zinc blende with lattice parameter a = 6.159 Å, from x-ray diffraction (XRD) studies. The scanning electron microscope (SEM) images revealed the radial structure of the grown spherulites. The growth mechanism for the spherulitic crystallization of β-In 2 Te 3 crystals has been discussed based on the theoretical models.