[13p-D305-1~16] 9.2 Nanoparticles, Nanowires and Nanosheets

▲ [13p-D305-2] Influence of hydrophilicity on hydrogen gas sensing properties of TiO₂ nanowires

〇(P)Saman Azhari¹, Mohd Nizar Hamidon², Hirofumi Tanaka¹ (1.Kyushu Inst of Tech, 2.UPM)

Keywords:Semiconductor, Gas Sensor, Nanowires

TiO₂ nanoparticles exhibit promising properties for gas sensing applications; although, there are not enough studies on the impacts of its various structures on the gas sensing behavior. It is widely known that TiO₂ nanoparticles can form nanostructures with high surface area and aspect ratio just by a simple hydrothermal treatment. TiO₂ nanowires are synthesized via alkali hydrothermal treatment of 10 M NaOH and titanium dioxide nanoparticles. Although synthesized nanostructures exhibit superior electrical properties in compared with nanoparticles, we have come to realize that such improvement are mainly as a result of adsorbed water molecules on the surface and cavities of nanostructures. P-type behavior is observed in fabricated sensors due to influence of water molecules. These results suggest, humidity dependency of TiO₂ nanowires for H₂ sensing applications.