Biomimetic hydrogel-CNT network induced enhancement of fluid-structure interactions for ultrasensitive nanosensorsBora, M., Kottapalli, A. G. P., Miao, J. & Triantafyllou, M. S., 27-Oct-2017, In : NPG Asia Materials. 9, 9 p., 440.
Research output: Contribution to journal › Article › Academic › peer-review
Flexible, self-powered, miniaturized, ultrasensitive flow sensors are in high demand for human motion detection, myoelectric prosthesis, biomedical robots, and health-monitoring devices. This paper reports a biomimetic nanoelectromechanical system (NEMS) flow sensor featuring a PVDF nanofiber sensing membrane with a hydrogel infused, vertically aligned carbon nanotube (VACNT) bundle that mechanically interacts with the flow. The hydrogel-VACNT structure mimics the cupula structure in biological flow sensors and gives the NEMS flow sensor ultrahigh sensitivity via a material-induced drag force enhancement mechanism. Through hydrodynamic experimental flow characterization, this work investigates the contributions of the mechanical and structural properties of the hydrogel in offering a sensing performance superior to that of conventional sensors. The ultrahigh sensitivity of the developed sensor enabled the detection of minute flows generated during human motion and micro-droplet propagation. The novel fabrication strategies and combination of materials used in the biomimetic NEMS sensor fabrication may guide the development of several wearable, flexible, and self-powered nanosensors in the future.
|Number of pages||9|
|Journal||NPG Asia Materials|
|Publication status||Published - 27-Oct-2017|
- ARTIFICIAL LATERAL-LINE, DESIGN, SENSITIVITY, NEUROMASTS, SENSORS