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Arrayed Force Sensors Made of Paper, Elastomer, and Hydrogel Particles
This article presents a sensor for detecting the distribution of forces on a surface. The device with nine buttons consisted of an elastomer-based layer as a touch interface resting on a substrate of patterned metallized paper. The elastomer-based layer included a three-by-three array of deformable,...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6187906/ https://www.ncbi.nlm.nih.gov/pubmed/30400546 http://dx.doi.org/10.3390/mi8120356 |
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author | Zou, Xiyue Liang, Tongfen Lopez, Nastassja Ahmed, Moustafa Ajayan, Akshitha Mazzeo, Aaron D. |
author_facet | Zou, Xiyue Liang, Tongfen Lopez, Nastassja Ahmed, Moustafa Ajayan, Akshitha Mazzeo, Aaron D. |
author_sort | Zou, Xiyue |
collection | PubMed |
description | This article presents a sensor for detecting the distribution of forces on a surface. The device with nine buttons consisted of an elastomer-based layer as a touch interface resting on a substrate of patterned metallized paper. The elastomer-based layer included a three-by-three array of deformable, hemispherical elements/reliefs, facing down toward an array of interdigitated capacitive sensing units on patterned metallized paper. Each hemispherical element is 20 mm in diameter and 8 mm in height. When a user applied pressure to the elastomer-based layer, the contact area between the hemispherical elements and the interdigitated capacitive sensing units increased with the deformation of the hemispherical elements. To enhance the sensitivity of the sensors, embedded particles of hydrogel in the elastomer-based layer increased the measured electrical responses. The measured capacitance increased because the effective dielectric permittivity of the hydrogel was greater than that of air. Electromechanical characterization verified that the hydrogel-filled elastomer was more sensitive to force at a low range of loads (23.4 pF/N) than elastomer alone without embedded hydrogel (3.4 pF/N), as the hydrogel reduced the effective elastic modulus of the composite material by a factor of seven. A simple demonstration suggests that the force-sensing array has the potential to contribute to wearable and soft robotic devices. |
format | Online Article Text |
id | pubmed-6187906 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-61879062018-11-01 Arrayed Force Sensors Made of Paper, Elastomer, and Hydrogel Particles Zou, Xiyue Liang, Tongfen Lopez, Nastassja Ahmed, Moustafa Ajayan, Akshitha Mazzeo, Aaron D. Micromachines (Basel) Article This article presents a sensor for detecting the distribution of forces on a surface. The device with nine buttons consisted of an elastomer-based layer as a touch interface resting on a substrate of patterned metallized paper. The elastomer-based layer included a three-by-three array of deformable, hemispherical elements/reliefs, facing down toward an array of interdigitated capacitive sensing units on patterned metallized paper. Each hemispherical element is 20 mm in diameter and 8 mm in height. When a user applied pressure to the elastomer-based layer, the contact area between the hemispherical elements and the interdigitated capacitive sensing units increased with the deformation of the hemispherical elements. To enhance the sensitivity of the sensors, embedded particles of hydrogel in the elastomer-based layer increased the measured electrical responses. The measured capacitance increased because the effective dielectric permittivity of the hydrogel was greater than that of air. Electromechanical characterization verified that the hydrogel-filled elastomer was more sensitive to force at a low range of loads (23.4 pF/N) than elastomer alone without embedded hydrogel (3.4 pF/N), as the hydrogel reduced the effective elastic modulus of the composite material by a factor of seven. A simple demonstration suggests that the force-sensing array has the potential to contribute to wearable and soft robotic devices. MDPI 2017-12-08 /pmc/articles/PMC6187906/ /pubmed/30400546 http://dx.doi.org/10.3390/mi8120356 Text en © 2017 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Zou, Xiyue Liang, Tongfen Lopez, Nastassja Ahmed, Moustafa Ajayan, Akshitha Mazzeo, Aaron D. Arrayed Force Sensors Made of Paper, Elastomer, and Hydrogel Particles |
title | Arrayed Force Sensors Made of Paper, Elastomer, and Hydrogel Particles |
title_full | Arrayed Force Sensors Made of Paper, Elastomer, and Hydrogel Particles |
title_fullStr | Arrayed Force Sensors Made of Paper, Elastomer, and Hydrogel Particles |
title_full_unstemmed | Arrayed Force Sensors Made of Paper, Elastomer, and Hydrogel Particles |
title_short | Arrayed Force Sensors Made of Paper, Elastomer, and Hydrogel Particles |
title_sort | arrayed force sensors made of paper, elastomer, and hydrogel particles |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6187906/ https://www.ncbi.nlm.nih.gov/pubmed/30400546 http://dx.doi.org/10.3390/mi8120356 |
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