A highly sensitive, low-cost, wearable pressure sensor based on conductive hydrogel spheres
KAUST DepartmentPhysical Sciences and Engineering (PSE) Division
MetadataShow full item record
AbstractWearable pressure sensing solutions have promising future for practical applications in health monitoring and human/machine interfaces. Here, a highly sensitive, low-cost, wearable pressure sensor based on conductive single-walled carbon nanotube (SWCNT)/alginate hydrogel spheres is reported. Conductive and piezoresistive spheres are embedded between conductive electrodes (indium tin oxide-coated polyethylene terephthalate films) and subjected to environmental pressure. The detection mechanism is based on the piezoresistivity of the SWCNT/alginate conductive spheres and on the sphere-electrode contact. Step-by-step, we optimized the design parameters to maximize the sensitivity of the sensor. The optimized hydrogel sensor exhibited a satisfactory sensitivity (0.176 ΔR/R0/kPa-1) and a low detectable limit (10 Pa). Moreover, a brief response time (a few milliseconds) and successful repeatability were also demonstrated. Finally, the efficiency of this strategy was verified through a series of practical tests such as monitoring human wrist pulse, detecting throat muscle motion or identifying the location and the distribution of an external pressure using an array sensor (4 × 4). © 2015 The Royal Society of Chemistry.
CitationTai Y, Mulle M, Aguilar Ventura I, Lubineau G (2015) A highly sensitive, low-cost, wearable pressure sensor based on conductive hydrogel spheres. Nanoscale 7: 14766–14773. Available: http://dx.doi.org/10.1039/c5nr03155a.
PublisherRoyal Society of Chemistry (RSC)
- Extremely Elastic Wearable Carbon Nanotube Fiber Strain Sensor for Monitoring of Human Motion.
- Authors: Ryu S, Lee P, Chou JB, Xu R, Zhao R, Hart AJ, Kim SG
- Issue date: 2015 Jun 23
- Ultrasensitive and Highly Stable Resistive Pressure Sensors with Biomaterial-Incorporated Interfacial Layers for Wearable Health-Monitoring and Human-Machine Interfaces.
- Authors: Chang H, Kim S, Jin S, Lee SW, Yang GT, Lee KY, Yi H
- Issue date: 2018 Jan 10
- Stretchable Array of Highly Sensitive Pressure Sensors Consisting of Polyaniline Nanofibers and Au-Coated Polydimethylsiloxane Micropillars.
- Authors: Park H, Jeong YR, Yun J, Hong SY, Jin S, Lee SJ, Zi G, Ha JS
- Issue date: 2015 Oct 27
- Sensing textile seam-line for wearable multimodal physiological monitoring.
- Authors: McKnight M, Agcayazi T, Kausche H, Ghosh T, Bozkurt A
- Issue date: 2016 Aug
- Wearable Resistive Pressure Sensor Based on Highly Flexible Carbon Composite Conductors with Irregular Surface Morphology.
- Authors: Kim KH, Hong SK, Jang NS, Ha SH, Lee HW, Kim JM
- Issue date: 2017 May 24