Structural, optical and nanomechanical properties of (1 1 1) oriented nanocrystalline ZnTe thin films


Autoria(s): Kiran, MSRN; Kshirsagar, S; Krishna, MG; Tewari, Surya P
Data(s)

2010

Resumo

Structural, optical and nanomechanical properties of nanocrystalline Zinc Telluride (ZnTe) films of thickness upto 10 microns deposited at room temperature on borosilicate glass substrates are reported. X-ray diffraction patterns reveal that the films were preferentially oriented along the (1 1 1) direction. The maximum refractive index of the films was 2.74 at a wavelength of 2000 nm. The optical band gap showed strong thickness dependence. The average film hardness and Young's modulus obtained from load-displacement curves and analyzed by Oliver-Pharr method were 4 and 70 GPa respectively. Hardness of (1 1 1) oriented ZnTe thin films exhibited almost 5 times higher value than bulk. The studies show clearly that the hardness increases with decreasing indentation size, for indents between 30 and 300 nm in depth indicating the existence of indentation size effect. The coefficient of friction for these films as obtained from the nanoscratch test was ~0.4.

Formato

application/pdf

Identificador

http://eprints.iisc.ernet.in/39936/1/Structural.pdf

Kiran, MSRN and Kshirsagar, S and Krishna, MG and Tewari, Surya P (2010) Structural, optical and nanomechanical properties of (1 1 1) oriented nanocrystalline ZnTe thin films. In: The European Physical Journal Applied Physics, 51 (1).

Publicador

Cambridge University Press

Relação

http://www.epjap.org/action/displayAbstract?fromPage=online&aid=8001718&fulltextType=RA&fileId=S1286004210000716

http://eprints.iisc.ernet.in/39936/

Palavras-Chave #Materials Engineering (formerly Metallurgy)
Tipo

Journal Article

PeerReviewed