Why the study?
The integration of physiological signal detection into compact, multifunctional platforms is critical for advancing next-generation biomedical devices.
A novel Piezotronic Bipolar Junction Transistor enables simultaneous, amplification-free detection of ECG and PPG-like signals, showing promise for next-generation wearable health monitors.
PBJT enables simultaneous ECG/PPG-like detection without amplification; leaves open clinical adoption pending validation studies.
The The integration of physiological signal detection into compact, multifunctional platforms is critical for advancing next-generation biomedical devices. We present a Piezotronic Bipolar Junction Transistor (PBJT) capable of simultaneous electrocardiogram (ECG) and photoplethysmogram-like (PPG-like) signal detection without external amplification or circuitry. Built from a ZnO/NiO/ZnO npn heterojunction on a flexible PET substrate, the device leverages the piezotronic effect to transduce mechanical signals and uses capacitive coupling through the thin PET layer to detect bioelectrical signals. Positioned on the neck over the jugular and carotid regions, and tested across multiple human subjects, the device captures biopotentials and pressure-induced deformations in real time. Band modulation analysis reveals distinct responses corresponding to ECG and PPG-like signals, while frequency-domain characterization confirms signal fidelity and strong ECG–PPG-like separation. This dual-mode functionality highlights the PBJT’s potential for compact, low-power, and integrated biosensing platforms for wearable health monitoring.
No takes yet. Share an insight, caveat, or question.
Iranmanesh et al. (2025) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: