Fig. 3: AC-enhanced mechanical sensor fabrication and gesture tracking.
a Fabrication scheme of the high-frequency liquid metal sensors. b Illustration highlighting compression and stretching zones located at the location of fingertips and knuckle joint in a liquid metal RF sensor-based gesture tracking glove. Pictures showing quantitative experimental measurements of stretching (c) and compression (d) via gesture tracking gloves. Resistance vs. time for dynamic cycles of stretching (e) and compression (f) in response to flexion of the knuckle joint angle (45°) and digital pinching force (~20 N) at low (40 Hz) and high frequency (40 MHz). g AC resistance at high (10 MHz) and low frequency (40 Hz) as a function of knuckle flexion angles. Error bars denote ± 1 s.d. (h) Rac vs. Rdc map for different knuckle bending angle (red) and pinching force (blue) at the fingertip at different frequencies (10 MHz, 5 MHz, 40 Hz).
