Development of highly sensitive gas sensing interfaces based on semiconductor nanocrystal pn junction

2017 Fiscal Year Final Research Report

• Project/Area Number: 26288107
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Inorganic industrial materials
• Research Institution: Kumamoto University
• Principal Investigator: Kida Tetsuya 熊本大学, 大学院先端科学研究部(工), 教授 (70363421)
• Co-Investigator(Kenkyū-buntansha): キタイン アルマンド 熊本大学, グローバル教育カレッジ, 教授 (50504693) ; 石渡 洋一 佐賀大学, 工学(系)研究科(研究院), 准教授 (00373267)
• Project Period (FY): 2014-04-01 – 2018-03-31
• Keywords: ガスセンサ / ナノ結晶 / ナノロッド / 半導体

Outline of Final Research Achievements

Microstructure control of n- and p-type semiconductor materials was studied to drastically improve their gas sensing properties. SnO2 nanorods that were synthesized by a hydrothermal method showed significantly high sensor responses to combustible gases including CO, ethanol, and acetone. The enhancement in the sensor response is due to improved gas diffusivity in porous films made of anisotropic SnO2 nanorods. ZnO nanorods also showed good sensitivity to combustible gases. For p-type materials, Cu2O nanocrystals were synthesized by a hot-soap method. They can sensitively detect H2S even at low temperatures when loaded with Pd. The diode composed of n-type ZnO nanorods and p-type Cu2O nanocrystals showed a good rectification behavior and responded to combustible gases.

Free Research Field

無機機能材料化学