title: Characterization of Anodic Aluminum Oxide Membrane with Variation of Crystallizing Temperature for pH Sensor.
abstract: We fabricated electrolyte-dielectric-metal (EDM) device incorporating a high-k Al2O3 sensing membrane from a porous anodic aluminum oxide (AAO) using a two step anodizing process for pH sensors. In order to change the properties of the AAO template, the crystallizing temperature was varied from 400 degrees C to 700 degrees C over 2 hours. The structural properties were observed by field emission scanning electron microscopy (FE-SEM). The pH sensitivity increased with an increase in the crystallizing temperature from 400 degrees C to 600 degrees C. However at 700 degrees C, deformation occurred. The porous AAO sensor with a crystallizing temperature of 600 degrees C displayed the good sensitivity and long-term stability and the values were 55.7 mV/pH and 0.16 mV/h, respectively.
authors.forename: Jin-Ho
authors.initials: JH
authors.lastname: Yeo
authors.forename: Sung-Gap
authors.initials: SG
authors.lastname: Lee
authors.forename: Ye-Won
authors.initials: YW
authors.lastname: Jo
authors.forename: Hye-Rin
authors.initials: HR
authors.lastname: Jung