Detection of amine gases by inverse opal photonic crystals infiltrated with precursor HPQ‐Ac of aggregation‐induced emission luminogen. Issue 2 (16th December 2020)

• Record Type: Journal Article
• Authors: Murakami, Hiroaki; Sawada, Mana; Kimura, Taiki; Takahara, Toshiki; Onodera, Takeshi
• Is Part Of: Electronics and communications in Japan. Volume 104:Issue 2(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2020-12-16
• Subjects: aggregation‐induced emission -- ammonia -- inverse opal -- odor -- photonic crystal -- sensor; Electronics -- Periodicals; Telecommunication -- Periodicals; 621.6805
• DOI: 10.1002/ecj.12300
• Languages: English
• ISSNs: 1942-9533

Abstract

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 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.