Enhancement of sensitivity for odor sensor based on photonic crystal

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K04427
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 21030:Measurement engineering-related
• Research Institution: Kyushu University
• Principal Investigator: Onodera Takeshi 九州大学, システム情報科学研究院, 准教授 (50336062)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: 逆オパール型 / フォトニック結晶 / 匂いセンサ / アンモニア / ナノホールアレイ

Outline of Final Research Achievements

In this study, mesopore-introduced inverse opal photonic crystals (IOPCs) were obtained by self-assembly of two different sizes of polystyrene (PS) nanoparticles mixed with a SiO2 precursor material (tetraethyl orthosilicate: TEOS) and the particles and substrate. A precursor of ammonia-induced emission (AIE), which reacts with ammonia, was immobilized, enabling the detection of ammonia gas at 10 ppb. By adjusting the concentration of TEOS mixed with PS particles, the interlayer distance was adjusted to match the band edge of the photonic band gap with the fluorescence wavelength of the AIE substance. As an application, we established a simple method for fabricating nanohole arrays using a single layer of PS nanoparticles as a mask.

Free Research Field

センサ工学

Academic Significance and Societal Importance of the Research Achievements

逆オパール型フォトニック結晶（IOPC）にメソ孔を導入し，凝集誘起発光物質と組み合わせて匂い物質であるアンモニアを高感度に検知する方法の提案を行った．さらに，高感度化の方法として，空隙間距離をシリカ前駆体の添加量により簡便に調整する方法を提案した．単層のポリスチレンナノ粒子によるフォトニック結晶をスパッタのマスクとして利用し，ナノホールアレイを作製することができる．そのために，移流集積法を用いたマスク作製方法を確立した．