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http://dx.doi.org/10.46670/JSST.2022.31.6.418

α-Pinene Sensing Properties of Rhombohedral In2O3 Nanoparticles Prepared using the Microwave-assisted Hydrothermal Method  

Byeong-Hun, Yu (Department of Electronic and Information Materials Engineering, Jeonbuk National Unversity)
Hyo Jung, Lee (Forest Wellfare Research Center, Korea Forest Wellfare Institute)
Joo Ho, Hwang (Forest Wellfare Research Center, Korea Forest Wellfare Institute)
Ji-Wook, Yoon (Department of Electronic and Information Materials Engineering, Jeonbuk National Unversity)
Publication Information
Journal of Sensor Science and Technology / v.31, no.6, 2022 , pp. 418-422 More about this Journal
Abstract
α-pinene is a natural volatile organic compound secreted by coniferous trees to protect themselves from attacks by insects, microorganisms, and viruses. Recently, studies have reported that α-pinene possesses pharmacological effects on various biological reactions such as anxiolytic, sleep-enhancing, anti-nociceptive, and inflammatory activity. Thus, forest bathing has recently received great attention as a novel therapy for treating severe diseases as well as psychological issues. However, appropriate places and timings for effective therapies are still veiled, because on-site monitoring of α-pinene gas in forests is barely possible. Although portable chemosensors could allow real-time analysis of α-pinene gas in forests, the α-pinene sensing properties of chemosensors have never been reported thus far. Herein, we report for the first time, the α-pinene sensing properties of an oxide semiconductor gas sensor based on rhombohedral In2O3 (h-In2O3) nanoparticles prepared by a microwave-assisted hydrothermal reaction. The h-In2O3 nanoparticle sensor showed a high response to α-pinene gas at ppm levels, even under humid conditions (for example, relative humidity of 50 %). The purpose of this research is to identify the potential of oxide semiconductor gas sensors for implementing portable devices that can detect α-pinene gas in forests in real-time.
Keywords
Gas sensors; $In_2O_3$ nanoparticles; Phytoncide; ${\alpha}$-pinene; Forest environment monitoring;
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