Droplet-Dispensed Graphene Oxide as Capacitive Sensing Elements for Flexible Pressure-Pulse Sensing Array
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
Author(s)
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Detail(s)
Original language | English |
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Pages (from-to) | 47-54 |
Journal / Publication | IEEE Open Journal of Nanotechnology |
Volume | 4 |
Online published | 21 Nov 2022 |
Publication status | Published - 2023 |
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DOI | DOI |
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Attachment(s) | Documents
Publisher's Copyright Statement
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Link to Scopus | https://www.scopus.com/record/display.uri?eid=2-s2.0-85144067155&origin=recordpage |
Permanent Link | https://scholars.cityu.edu.hk/en/publications/publication(b608a86b-4854-44b4-8b1d-b534dd79904b).html |
Abstract
We report a novel flexible capacitive pressure-pulse sensor array developed by integrating
droplet-dispensed graphene oxide (GO) sensing elements and flexible electronics. The utilization of droplet-dispensing technology enables the fabrication multiple capacitive sensing elements rapidly while producing
sensitive pressure sensors with excellent repeatability. The dispensed droplet volume (GO aqueous dispersion) ranged from around 33.5 to 65.4 pL with diameter ranging from 40 to 50 μm. The size (i.e., footprint
and dielectric material thickness) of a sensing element can be controlled by the total GO dispersed per droplet.
The fabrication process and preliminary characterization of these GO capacitive sensors are discussed in
this paper. Thus far, we have shown that these sensors have a sensitivity of ∼10−3 kPa−1, with the relative
permittivity of the dispensed GO being ∼6 (measured at a frequency of 600 kHz). We have also demonstrated
that the printed sensing elements can be used for human wrist pulse sensing. Hence the technology described
in this paper could potentially be used in wearable electronics for healthcare applications.
Research Area(s)
- droplet dispensing, Fabrication, flexible sensors, graphene oxide, human pulse sensing, Micromechanical devices, Pressure sensors, Robot sensing systems, Sensitivity, Sensors, tactile sensor, Three-dimensional printing
Citation Format(s)
Droplet-Dispensed Graphene Oxide as Capacitive Sensing Elements for Flexible Pressure-Pulse Sensing Array. / Kong, Ka Wai; Wang, Keer; Leung, Alice Yeuk Lan et al.
In: IEEE Open Journal of Nanotechnology, Vol. 4, 2023, p. 47-54.
In: IEEE Open Journal of Nanotechnology, Vol. 4, 2023, p. 47-54.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
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