Highly Stable Liquid Metal-Based Pressure Sensor Integrated with a Microfluidic Channel
Pressure measurement is considered one of the key parameters in microfluidic systems. It has been widely used in various fields, such as in biology and biomedical fields. The electrical measurement method is the most widely investigated; however, it is unsuitable for microfluidic systems because of...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2015-05-01
|
| Series: | Sensors |
| Subjects: | |
| Online Access: | http://www.mdpi.com/1424-8220/15/5/11823 |
| _version_ | 1818015572332380160 |
|---|---|
| author | Taekeon Jung Sung Yang |
| author_facet | Taekeon Jung Sung Yang |
| author_sort | Taekeon Jung |
| collection | DOAJ |
| description | Pressure measurement is considered one of the key parameters in microfluidic systems. It has been widely used in various fields, such as in biology and biomedical fields. The electrical measurement method is the most widely investigated; however, it is unsuitable for microfluidic systems because of a complicated fabrication process and difficult integration. Moreover, it is generally damaged by large deflection. This paper proposes a thin-film-based pressure sensor that is free from these limitations, using a liquid metal called galinstan. The proposed pressure sensor is easily integrated into a microfluidic system using soft lithography because galinstan exists in a liquid phase at room temperature. We investigated the characteristics of the proposed pressure sensor by calibrating for a pressure range from 0 to 230 kPa (R2 > 0.98) using deionized water. Furthermore, the viscosity of various fluid samples was measured for a shear-rate range of 30–1000 s−1. The results of Newtonian and non-Newtonian fluids were evaluated using a commercial viscometer and normalized difference was found to be less than 5.1% and 7.0%, respectively. The galinstan-based pressure sensor can be used in various microfluidic systems for long-term monitoring with high linearity, repeatability, and long-term stability. |
| first_indexed | 2024-04-14T06:58:48Z |
| format | Article |
| id | doaj.art-39ab89c145364f0bbfb1da03ff4e2b74 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-14T06:58:48Z |
| publishDate | 2015-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-39ab89c145364f0bbfb1da03ff4e2b742022-12-22T02:06:48ZengMDPI AGSensors1424-82202015-05-01155118231183510.3390/s150511823s150511823Highly Stable Liquid Metal-Based Pressure Sensor Integrated with a Microfluidic ChannelTaekeon Jung0Sung Yang1Department of Medical System Engineering, GIST, Gwangju 500-712, KoreaDepartment of Medical System Engineering, GIST, Gwangju 500-712, KoreaPressure measurement is considered one of the key parameters in microfluidic systems. It has been widely used in various fields, such as in biology and biomedical fields. The electrical measurement method is the most widely investigated; however, it is unsuitable for microfluidic systems because of a complicated fabrication process and difficult integration. Moreover, it is generally damaged by large deflection. This paper proposes a thin-film-based pressure sensor that is free from these limitations, using a liquid metal called galinstan. The proposed pressure sensor is easily integrated into a microfluidic system using soft lithography because galinstan exists in a liquid phase at room temperature. We investigated the characteristics of the proposed pressure sensor by calibrating for a pressure range from 0 to 230 kPa (R2 > 0.98) using deionized water. Furthermore, the viscosity of various fluid samples was measured for a shear-rate range of 30–1000 s−1. The results of Newtonian and non-Newtonian fluids were evaluated using a commercial viscometer and normalized difference was found to be less than 5.1% and 7.0%, respectively. The galinstan-based pressure sensor can be used in various microfluidic systems for long-term monitoring with high linearity, repeatability, and long-term stability.http://www.mdpi.com/1424-8220/15/5/11823pressure sensorliquid metalgalinstanmicrofluidicviscosity |
| spellingShingle | Taekeon Jung Sung Yang Highly Stable Liquid Metal-Based Pressure Sensor Integrated with a Microfluidic Channel Sensors pressure sensor liquid metal galinstan microfluidic viscosity |
| title | Highly Stable Liquid Metal-Based Pressure Sensor Integrated with a Microfluidic Channel |
| title_full | Highly Stable Liquid Metal-Based Pressure Sensor Integrated with a Microfluidic Channel |
| title_fullStr | Highly Stable Liquid Metal-Based Pressure Sensor Integrated with a Microfluidic Channel |
| title_full_unstemmed | Highly Stable Liquid Metal-Based Pressure Sensor Integrated with a Microfluidic Channel |
| title_short | Highly Stable Liquid Metal-Based Pressure Sensor Integrated with a Microfluidic Channel |
| title_sort | highly stable liquid metal based pressure sensor integrated with a microfluidic channel |
| topic | pressure sensor liquid metal galinstan microfluidic viscosity |
| url | http://www.mdpi.com/1424-8220/15/5/11823 |
| work_keys_str_mv | AT taekeonjung highlystableliquidmetalbasedpressuresensorintegratedwithamicrofluidicchannel AT sungyang highlystableliquidmetalbasedpressuresensorintegratedwithamicrofluidicchannel |