Detection of amine gases by inverse opal photonic crystals infiltrated with precursor HPQ-Ac of aggregation-induced emission luminogen

Hiroaki Murakami, Mana Sawada, Taiki Kimura, Toshiki Takahara, Takeshi Onodera

Research output: Contribution to journalArticlepeer-review

Abstract

In this study, to detect amine gases such as ammonia, a kind of biological gas, with high sensitivity, we fabricated a device that combines an inverse opal photonic crystal (IOPC) and 2-(4-oxo-3,4-dihydroquinazolin-2-yl)phenyl acetate (HPQ-Ac), a precursor of the aggregation-induced emission luminogen. IOPC silica structures (200IOPC, 350IOPC, 500IOPC) with SiO2 were respectively obtained after calcination with 200, 350, and 500 nm polystyrene (PS) nanoparticles used as templates and tetraethyl orthosilicate (TEOS) formed by self-assembly on a slide glass. Furthermore, mesopore-introduced IOPC (50 nm-350IOPC) was prepared by mixing 350 nm and 50 nm PS particles in TEOS solution. Each IOPC was infiltrated with HPQ-Ac, reacted with ammonia, and the rate of change in emission intensity owing to fluorescence was examined. The highest response was obtained for 350IOPC infiltrated with HPQ-Ac among the three IOPCs without mesopores. The 50 nm-350IOPC had higher sensitivity than 350IOPC and was found to be able to detect 50 ppb ammonia gas.

Original languageEnglish
Pages (from-to)309-314
Number of pages6
JournalIEEJ Transactions on Sensors and Micromachines
Volume140
Issue number11
DOIs
Publication statusPublished - Nov 1 2020

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'Detection of amine gases by inverse opal photonic crystals infiltrated with precursor HPQ-Ac of aggregation-induced emission luminogen'. Together they form a unique fingerprint.

Cite this