Synthesis of indium tin oxide nanoparticles by a nonhydrolytic sol-gel method

摘要

Indium tin oxide nanoparticles were synthesized in two different sizes by a nonhydrolytic sol-gel method. These powders were then transformed into ITO via an intermediate metastable state at between 300 and 600°C. The presence of characteristic O-In-O and O-Sn-O bands at 480 and 670 cm ~(-1)confirmed the formation of ITO. The X-ray diffraction patterns indicated the preferential formation of metastable hexagonal phase ITO(corundum type)as opposed to cubic phase ITO when the reflux time was less than 3 h and the heat treatment temperature was below 600°C. Particle morphology and crystal size were examined by scanning electron microscopy.