Title: Synthesis and application of TiO2 amorphous nanoparticles as an IR detector

Authors: Zahra Fakhroueian, Azizollah Shafiekhani, Faezeh Farzaneh

Addresses: Department of Chemistry, Alzahra University, Vanak, Tehran, 1993891176, Iran. ' Department of Physics, Alzahra University, Vanak, Tehran, 1993891176, Iran. ' Department of Chemistry, Alzahra University, Vanak, Tehran, 1993891176, Iran

Abstract: Nanostructure TiO2 was prepared in the form of sol-gel by a hydrolysis process and fast-quenching method. The prepared sample characterised by different techniques. It was found that the particles have nano-amorphous structure. Due to fast-quenching effect, the fabricated sample at such annealing treatment has many oxygen vacancies. The measured band gap found to be 1.2 eV, which has strong transmittance in vis-NIR region. The photocurrent measurement using capacitance probe method of a black body radiation and few wavelengths at NIR showed good sensibility. The ratio of signal to noise under 100 V bias voltage at room temperature was 2:1.

Keywords: nano-amorphous nanoparticles; TiO2; semiconductors; IR detectors; fast quenching; titanium dioxide; infrared detectors; sol-gel; nanostructures; nanotechnology.

DOI: 10.1504/IJNM.2010.033867

International Journal of Nanomanufacturing, 2010 Vol.5 No.3/4, pp.254 - 259

Available online: 02 Jul 2010 *

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