Dayal, Padullaparthi Babu and Shivaprasad, Sonnada M. and Mehta, Bodh Raj (2005) Synthesis of Cubic and Hexagonal CdTe Nanoparticles Dispersed in SiO2 Films: Role of Oxygen during Sintering. Japanese Journal of Applied Physics, 44 . 8222-8226 . ISSN Online: 1347 – 4065/ Print: 0021 - 4922
Full text is not hosted in this archive but may be available via the Official URL, or by requesting a copy from the corresponding author.
Official URL: http://jjap.ipap.jp/link?JJAP/44/8222/
Cadmium telluride nanoparticles dispersed in SiO2 films have been grown by the co-sputtering of elemental Cd, Te and SiO2 targets in argon atmosphere. The role of oxygen during annealing on the structural and optical properties of CdTe nanoparticles dispersed in SiO2 films has been studied. Formation of a CdTeO3 layer around the CdTe nanoparticle core due to ambient oxygen present in air results in structural defects and thus the formation of hexagonal CdTe nanoparticles in air-annealed samples. In vacuum-annealed samples, defect free and well-crystallized cubic CdTe nanoparticles are formed which show excitonic features in the absorption spectra. These results have been confirmed by carrying out i) annealing in vacuum and air ambiences in a sequence on the same sample and ii) by depositing an additional layer of SiO2 on the CdTe:SiO2 samples to prevent the diffusion of ambient oxygen.
|Subjects:||Physical Science > Nanophysics|
Physical Science > Nano objects
Material Science > Nanochemistry
Material Science > Nanostructured materials
|Divisions:||Faculty of Engineering, Science and Mathematics > School of Physics|
Faculty of Engineering, Science and Mathematics > School of Chemistry
|Deposited On:||27 May 2009 10:20|
|Last Modified:||27 May 2009 10:20|
Repository Staff Only: item control page