Synthesis of anisotropic metal oxide nanoparticles for selective gas detection toward trace bio-marker gases

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K15659
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 36010:Inorganic compounds and inorganic materials chemistry-related
• Research Institution: Kyushu University
• Principal Investigator: Suematsu Koichi 九州大学, 総合理工学研究院, 助教 (90637555)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: ガスセンサ / ナノロッド / 吸着 / 燃焼反応

Outline of Final Research Achievements

SnO2 nanorods were used for pulse-driven semiconductor gas sensors to accomplish a selective detection of trace organic gases in a low gas concentration range. Firstly, I successfully controlled the rod length of SnO2 nanorod by the solvent concentration and synthesis time of hydrothermal treatment. Moreover, Pd loading on SnO2 nanorods activates the combustion reaction of organic gases and increases the amount of the change in the electrical resistance under the sensor heating period. Thus, I achieved selective toluene detection at the ppb level by using Pd-loaded SnO2 nanorods under pulse-driven mode.

Free Research Field

無機材料科学

Academic Significance and Societal Importance of the Research Achievements

半導体ガスセンサによる微量ガスの選択的検出は、将来的な医療診断への展開やヘルスケア、農業や食品管理等の多様な分野への応用展開に向けて期待されている。そこでガスセンサ用材料として、酸化スズナノロッドのロッド長制御及び表面反応活性向上を試みた。さらにパルス加熱駆動により、微量有機ガスの選択的検出を実現、材料設計とセンサ駆動の融合により、半導体ガスセンサの高性能化を達成した。