Projects per year
Abstract
Monitoring human respiratory patterns is of great importance as it gives essential information for various medical conditions, e.g. sleep apnoea syndrome and chronic obstructive pulmonary disease and asthma, etc. Herein, we have developed a polymeric airflow sensor based on nanocomposites of vertically grown graphene nanosheets (VGNs) with polydimethylsiloxane (PDMS) and explored their applications in monitoring human respiration. The sensing performance of the VGNs/PDMS nanocomposite was characterized by exposing to a range of airflow rates (20-130 l min-1), and a linear performance with high sensitivity and low response time (mostly below 1 s) was observed. To evaluate the experimental results, finite-element simulation models were developed in the COMSOL Multiphysics package. The piezoresistive properties of VGNs/PDMS thin film and fluid-solid interaction were thoroughly studied. Laser Doppler vibrometry measures of sensor tip displacement closely approximated simulated deflection results and validated the dynamic response of the sensor. By comparing the proposed sensor and some other airflow sensors in the literature, it is concluded that the VGNs/PDMS airflow sensor has excellent features in terms of sensor height, detection range and sensitivity. The potential application of the VGNs/PDMS airflow sensor in detecting the respiration pattern of human exercises like walking, jogging and running has been demonstrated.
Original language | English |
---|---|
Article number | 20210753 |
Pages (from-to) | 1-11 |
Number of pages | 11 |
Journal | Journal of the Royal Society Interface |
Volume | 18 |
Issue number | 185 |
DOIs | |
Publication status | Published - Dec 2021 |
Keywords
- respiratory sensors
- piezoresistive sensors
- finite-element simulation
- graphene-based sensors
- vertical graphene nanosheets
Fingerprint
Dive into the research topics of 'Polymeric piezoresistive airflow sensor to monitor respiratory patterns'. Together they form a unique fingerprint.Projects
- 2 Finished
-
Ear-on-a-Chip: Nanosensors in Artificial Cochlea for Natural Hearing
1/01/18 → 31/12/20
Project: Research
-
ARC_DECRA: Stretchable Strain Sensors Based on 3D-structured Nano-Carbon
1/05/17 → 30/10/20
Project: Other