Authors: O. Lupan, L. Chow, G. Chai, V. Trofim
Affilation: University of Central Florida, United States
Pages: 227 - 230
Keywords: sensor, nanotetrapods, zinc oxide
Low-cost, nonpoisonous and highly sensitive and selective sensors are needed for detection of various gases in the environment. ZnO tetrapod have potential application as chemical sensors. Our current experiments have shown that ZnO tetrapod sensor demonstrate sensitivity and selectivity in resistance upon exposure to UV light, O2, NH3 and LPG gas. It is expected that a suspended nanorods-based tetrapod could have more surface area than a comparable nonsuspended structure (cross ZnO nanorods or individual nanorod), so the sensitivity will be improved. In summary, self-assembly of perpendicular ZnO nanotetrapods on SiO2/Si have been successfully grown by aqueous solution deposition. Novel individual ZnO nanotetrapod sensor was fabricated by in situ lift-out technique and investigated.