A Highly Sensitive Ammonia Gas Sensor Using Micrometer-Sized Core–Shell-Type Spherical Polyaniline Particles

A highly sensitive NH<sub>3</sub> gas sensor based on micrometer-sized polyaniline (PANI) spheres was successfully fabricated. The PANI microspheres were prepared via a facile in situ chemical oxidation polymerization in a polystyrene microsphere dispersion solution, resulting in a core–...

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Autores principales:	Masanobu Matsuguchi, Tomoki Nakamae, Ryoya Fujisada, Shunsuke Shiba
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	polyaniline NH<sub>3</sub> gas sensor microspheres core–shell structure Chemical technology TP1-1185
Acceso en línea:	https://doaj.org/article/ddad1332fa594363af41b82b271c2edf
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spelling	oai:doaj.org-article:ddad1332fa594363af41b82b271c2edf2021-11-25T18:57:08ZA Highly Sensitive Ammonia Gas Sensor Using Micrometer-Sized Core–Shell-Type Spherical Polyaniline Particles10.3390/s212275221424-8220https://doaj.org/article/ddad1332fa594363af41b82b271c2edf2021-11-01T00:00:00Zhttps://www.mdpi.com/1424-8220/21/22/7522https://doaj.org/toc/1424-8220A highly sensitive NH<sub>3</sub> gas sensor based on micrometer-sized polyaniline (PANI) spheres was successfully fabricated. The PANI microspheres were prepared via a facile in situ chemical oxidation polymerization in a polystyrene microsphere dispersion solution, resulting in a core–shell structure. The sensor response increased as the diameter of the microspheres increased. The PSt@PANI(4.5) sensor, which had microspheres with a 4.5 μm average diameter, showed the largest response value of 77 for 100 ppm dry NH<sub>3</sub> gas at 30 °C, which was 20 times that of the PANI-deposited film-based sensor. Even considering measurement error, the calculated detection limit was 46 ppb. A possible reason for why high sensitivity was achieved is simply the use of micrometer-sized PANI spherical particles. This research succeeded in providing a new and simple technology for developing a high-sensitivity NH<sub>3</sub> gas sensor that operates at room temperature.Masanobu MatsuguchiTomoki NakamaeRyoya FujisadaShunsuke ShibaMDPI AGarticlepolyanilineNH<sub>3</sub> gas sensormicrospherescore–shell structureChemical technologyTP1-1185ENSensors, Vol 21, Iss 7522, p 7522 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	polyaniline NH<sub>3</sub> gas sensor microspheres core–shell structure Chemical technology TP1-1185
spellingShingle	polyaniline NH<sub>3</sub> gas sensor microspheres core–shell structure Chemical technology TP1-1185 Masanobu Matsuguchi Tomoki Nakamae Ryoya Fujisada Shunsuke Shiba A Highly Sensitive Ammonia Gas Sensor Using Micrometer-Sized Core–Shell-Type Spherical Polyaniline Particles
description	A highly sensitive NH<sub>3</sub> gas sensor based on micrometer-sized polyaniline (PANI) spheres was successfully fabricated. The PANI microspheres were prepared via a facile in situ chemical oxidation polymerization in a polystyrene microsphere dispersion solution, resulting in a core–shell structure. The sensor response increased as the diameter of the microspheres increased. The PSt@PANI(4.5) sensor, which had microspheres with a 4.5 μm average diameter, showed the largest response value of 77 for 100 ppm dry NH<sub>3</sub> gas at 30 °C, which was 20 times that of the PANI-deposited film-based sensor. Even considering measurement error, the calculated detection limit was 46 ppb. A possible reason for why high sensitivity was achieved is simply the use of micrometer-sized PANI spherical particles. This research succeeded in providing a new and simple technology for developing a high-sensitivity NH<sub>3</sub> gas sensor that operates at room temperature.
format	article
author	Masanobu Matsuguchi Tomoki Nakamae Ryoya Fujisada Shunsuke Shiba
author_facet	Masanobu Matsuguchi Tomoki Nakamae Ryoya Fujisada Shunsuke Shiba
author_sort	Masanobu Matsuguchi
title	A Highly Sensitive Ammonia Gas Sensor Using Micrometer-Sized Core–Shell-Type Spherical Polyaniline Particles
title_short	A Highly Sensitive Ammonia Gas Sensor Using Micrometer-Sized Core–Shell-Type Spherical Polyaniline Particles
title_full	A Highly Sensitive Ammonia Gas Sensor Using Micrometer-Sized Core–Shell-Type Spherical Polyaniline Particles
title_fullStr	A Highly Sensitive Ammonia Gas Sensor Using Micrometer-Sized Core–Shell-Type Spherical Polyaniline Particles
title_full_unstemmed	A Highly Sensitive Ammonia Gas Sensor Using Micrometer-Sized Core–Shell-Type Spherical Polyaniline Particles
title_sort	highly sensitive ammonia gas sensor using micrometer-sized core–shell-type spherical polyaniline particles
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/ddad1332fa594363af41b82b271c2edf
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A Highly Sensitive Ammonia Gas Sensor Using Micrometer-Sized Core–Shell-Type Spherical Polyaniline Particles

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