Soft Ionic Pressure Sensor with Aloe Vera Gel for Low-Pressure Applications
Ionic pressure sensors are made of ionic compounds suspended in a suitable solvent mixture. When external pressure is exerted on them, it is reflected as a change in electrical parameters due to physical deformation and a redistribution of ions within the sensing medium. Variations in the compositio...
| 發表在: | Micromachines |
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| Main Authors: | , , |
| 格式: | Article |
| 語言: | 英语 |
| 出版: |
MDPI AG
2022-01-01
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| 主題: | |
| 在線閱讀: | https://www.mdpi.com/2072-666X/13/2/146 |
| _version_ | 1850756626676449280 |
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| author | Vishnu Sujeesh Godwin Ponraj Hongliang Ren |
| author_facet | Vishnu Sujeesh Godwin Ponraj Hongliang Ren |
| author_sort | Vishnu Sujeesh |
| collection | DOAJ |
| container_title | Micromachines |
| description | Ionic pressure sensors are made of ionic compounds suspended in a suitable solvent mixture. When external pressure is exerted on them, it is reflected as a change in electrical parameters due to physical deformation and a redistribution of ions within the sensing medium. Variations in the composition and material of the sensing medium result in different pressure sensors with varying operating ranges and sensitivity. This work presents the design and fabrication procedure of a novel soft-pressure sensor for a very low-pressure range (<20 mm Hg) using Aloe vera gel and Glycerin as the solvent for the ionic sensing medium. We also provide a comparative study on the performance of sensor prototypes with varying solvent concentrations and geometric parameters based on a series of characterization experiments. Maximum sensitivity (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>7.498</mn><mo>×</mo><msup><mrow><mn>10</mn></mrow><mrow><mo>−</mo><mn>4</mn></mrow></msup><mo> </mo><mi mathvariant="sans-serif">Ω</mi><mo>/</mo><mi>mmHg</mi></mrow></semantics></math></inline-formula>) was observed when using 40% glycerin in the sensing medium, filled in a toroidal geometry with outer and inner channel diameters of 8 mm and 7 mm, respectively. The proposed sensor is entirely soft and can be designed to conform to any desired geometry. |
| format | Article |
| id | doaj-art-8cf58afdc70a42c9a285f856a008fa96 |
| institution | Directory of Open Access Journals |
| issn | 2072-666X |
| language | English |
| publishDate | 2022-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| spelling | doaj-art-8cf58afdc70a42c9a285f856a008fa962025-08-19T22:35:19ZengMDPI AGMicromachines2072-666X2022-01-0113214610.3390/mi13020146Soft Ionic Pressure Sensor with Aloe Vera Gel for Low-Pressure ApplicationsVishnu Sujeesh0Godwin Ponraj1Hongliang Ren2Department of Biomedical Engineering, National University of Singapore, Singapore 117575, SingaporeDepartment of Biomedical Engineering, National University of Singapore, Singapore 117575, SingaporeDepartment of Biomedical Engineering, National University of Singapore, Singapore 117575, SingaporeIonic pressure sensors are made of ionic compounds suspended in a suitable solvent mixture. When external pressure is exerted on them, it is reflected as a change in electrical parameters due to physical deformation and a redistribution of ions within the sensing medium. Variations in the composition and material of the sensing medium result in different pressure sensors with varying operating ranges and sensitivity. This work presents the design and fabrication procedure of a novel soft-pressure sensor for a very low-pressure range (<20 mm Hg) using Aloe vera gel and Glycerin as the solvent for the ionic sensing medium. We also provide a comparative study on the performance of sensor prototypes with varying solvent concentrations and geometric parameters based on a series of characterization experiments. Maximum sensitivity (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>7.498</mn><mo>×</mo><msup><mrow><mn>10</mn></mrow><mrow><mo>−</mo><mn>4</mn></mrow></msup><mo> </mo><mi mathvariant="sans-serif">Ω</mi><mo>/</mo><mi>mmHg</mi></mrow></semantics></math></inline-formula>) was observed when using 40% glycerin in the sensing medium, filled in a toroidal geometry with outer and inner channel diameters of 8 mm and 7 mm, respectively. The proposed sensor is entirely soft and can be designed to conform to any desired geometry.https://www.mdpi.com/2072-666X/13/2/146pressure sensingaloe vera gelsoft sensors |
| spellingShingle | Vishnu Sujeesh Godwin Ponraj Hongliang Ren Soft Ionic Pressure Sensor with Aloe Vera Gel for Low-Pressure Applications pressure sensing aloe vera gel soft sensors |
| title | Soft Ionic Pressure Sensor with Aloe Vera Gel for Low-Pressure Applications |
| title_full | Soft Ionic Pressure Sensor with Aloe Vera Gel for Low-Pressure Applications |
| title_fullStr | Soft Ionic Pressure Sensor with Aloe Vera Gel for Low-Pressure Applications |
| title_full_unstemmed | Soft Ionic Pressure Sensor with Aloe Vera Gel for Low-Pressure Applications |
| title_short | Soft Ionic Pressure Sensor with Aloe Vera Gel for Low-Pressure Applications |
| title_sort | soft ionic pressure sensor with aloe vera gel for low pressure applications |
| topic | pressure sensing aloe vera gel soft sensors |
| url | https://www.mdpi.com/2072-666X/13/2/146 |
| work_keys_str_mv | AT vishnusujeesh softionicpressuresensorwithaloeveragelforlowpressureapplications AT godwinponraj softionicpressuresensorwithaloeveragelforlowpressureapplications AT hongliangren softionicpressuresensorwithaloeveragelforlowpressureapplications |