Nano Archive

Size-dependent conductivity-type inversion in Cu2O nanoparticles

Balamurugan, B. and Aruna, I. and Mehta, B. R. and Shivaprasad, S. M. (2004) Size-dependent conductivity-type inversion in Cu2O nanoparticles. PHYSICAL REVIEW B, 69 (16). p. 165419. ISSN 10980121

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X-ray photoemission spectroscopy and optical absorption studies have been carried out on Cu2O nanoparticles prepared using the activated reactive evaporation technique. A strong shift of the valence band edge (from 0.7 to 1.8 eV) has been observed on reduction of the nanoparticle size from 20 nm to 4 nm. The size-dependent modifications in the energy level diagram and metal-Cu2O nanoparticle Schottky junction characteristics confirm the observation of the inversion of conductivity type from p-type bulk conductivity to n-type conductivity in Cu2O nanoparticles at lower dimensions. This study can initiate a further methodology for tailoring the semiconductor properties of a material by controlling the nanoparticle size.

Item Type:Article
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
ID Code:5073
Deposited By:JNCASR
Deposited On:27 May 2009 10:15
Last Modified:27 May 2009 10:15

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