Journal
NANO ENERGY
Volume 63, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.nanoen.2019.06.040
Keywords
Diode-amplified TENG; Direct muscle stimulation; Self-powered; Output amplification; Resonance frequency of neuron; Exponential current waveform
Categories
Funding
- National Research Foundation Competitive research programme (NRF-CRP) 'Peripheral Nerve Prostheses: A Paradigm Shift in Restoring Dexterous Limb Function' [NRF-CRP10-2012-01]
- National Research Foundation Competitive research programme (NRF-CRP) 'Energy Harvesting Solutions for Biosensors' [R-263-000-A27-281]
- National Research Foundation Competitive research programme (NRF-CRP) 'Piezoelectric Photonics Using CMOS Compatible AlN Technology for Enabling The Next Generation Photonics ICs and Nanosensors' [R-263-000-C24-281]
- Faculty Research Committee (FRC) 'Thermoelectric Power Generator (TEG) Based Self-Powered ECG Plaster -System Integration (Part 3)' [R-263-000-B56-112]
- HIFES Seed Funding 'Hybrid Integration of Flexible Power Source and Pressure Sensors' [R-263-501-012-133]
- National Natural Science Foundation of China [61875015, 31571006]
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Triboelectric nanogenerators (TENGs) device is proven to be a feasible method for self-powered direct neural/ muscle stimulations. However, the higher threshold current required for direct muscle stimulation makes the efficiency of TENGs stimulator questionable. In this study, a new general configuration of TENG device, Diode amplified Triboelectric nanogenerators (D-TENGs), is proposed to greatly enhance the efficiency of direct muscle stimulation in three aspects: 1. the current can be much amplified by D-TENGs; 2. the exponential current pulse of D-TENGs device is the optimal waveform with the highest efficiency for muscle stimulation; 3. the D-TENGs can boost up the frequency of the current pulse to match with the resonance frequency of motoneurons in muscle, which is around 500 Hz. Thus, D-TENGs can be considered as the optimal TENG device for direct muscle stimulations. Meanwhile, the best electrode shift phenomenon observed in the experiments is explained and a general guideline for neural interface design is proposed.
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