DOI: 10.5061/dryad.mc14j48
title: Data from: Transcutaneous ultrasound energy harvesting using capacitive triboelectric technology

description: A major challenge for implantable medical systems is the inclusion or
 reliable delivery of electrical power. We use ultrasound to deliver
 mechanical energy through skin and liquids, and demonstrate a thin
 implantable vibrating triboelectric generator able to effectively harvest
 it. The ultrasound can induce the micrometer scale displacement of a
 polymer thin membrane to generate electrical energy through contact
 electrification. We recharge a Li-ion battery at a rate of 166 μC/s in
 water. The voltage and current generated ex-vivo by ultrasound-energy
 transfer reached 2.4 V and 156 µA under porcine tissue. It shows that
 capacitive triboelectric electret is the first technology able to compete
 with piezoelectricity to harvest ultrasound in-vivo and power medical
 implants.
description: Data S1 (Fig. 1C, D,
 E)Photo image of the
 VI-TEG device (upward and downward side) and COMSOL Multiphysics file
 calculated “acoustic pressure”, “total displacement” under ultrasound at
 20 kHz in water.Figure
 1.zipData S2 (Fig. 2A, C, D,
 E, F)Photo image of the
 VI-TEG device located inside the water bath and ultrasound probe set. Raw
 output data measured output voltage and current, and optimum power output
 at certain impedance given in csv and opj format.Figure
 2.zipData S3 (Fig. 3A, B, C,
 D)Raw
 output data measured charging capacitor (4.7 mF) and Li-ion battery (0.7
 mAh), and output voltage and current as a function of the probe distance
 and the probe power in csv and opj format.Figure
 3.zipData S4 (Fig. 4D,
 E)Raw
 output data measuring output voltage and current at different implant
 depth (0.5, 1.0 cm)Figure
 4.zipData S5 (Fig.
 S2)Photo image of the
 cross-sectional VI-TEG characterized by FE-SEM, demonstrating the air gap
 between perfluoroalkoxy (PFA) and bottom Printed Circuit Board
 (PCB).Fig.
 S2.zipData S6 (Fig.
 S3)COMSOL Multiphysics
 files calculated acoustic pressure and its distribution in the VI-TEG in
 the presence of the air and the electrode under ultrasound at 20 kHz,
 including photo images captured in png format.Fig.
 S3.zipData S7 (Fig.
 S4)COMSOL Multiphysics
 files calculated acoustic pressure and its distribution in the VI-TEG
 depending on the dimension of the device under ultrasound at 20 kHz,
 including photo images captured in png format.Fig.
 S4.zipData S8 (Fig.
 S5)COMSOL Multiphysics file
 calculated acoustic pressure field and resulting displacement of the
 VI-TEG under ultrasound at 20 kHz, including photo images captured in png
 format.Fig.
 S5.zipData S9 (Fig.
 S6)Photo image of the
 experimental setup to measure electrical property of the VI-TEG under
 ultrasound at 20 kHz.Fig.
 S6.zipData S10 (Fig.
 S7)Raw charging capacitors
 (capacitance: 0.1, 0.47, 1 mF) data measured charging rate depending on
 the presence of both rectifier and transformer.Fig.
 S7.zipData S11 (Fig.
 S8)Raw output data measured
 voltage of the VI-TEG depending on the probe distance (1-10 mm) under
 ultrasound at 20 kHz.Fig.
 S8.zipData S12 (Fig.
 S9)Raw output data measured
 output voltage of the VI-TEG at 2 mm probe distance under ultrasound at 20
 kHz.Fig.
 S9.zipData S13 (Fig.
 S10)Raw output data measured
 output voltage of the VI-TEG at 5 mm probe distance under ultrasound at 20
 kHz.Fig.
 S10.zipData S14 (Fig.
 S11)COMSOL Multiphysics file
 calculated displacement of the VI-TEG depending on a probe distance (3, 5,
 7 mm) under ultrasound at 20 kHz, including photo images captured in png
 format.Fig.
 S11.zipData S15 (Fig.
 S12)Raw output data measured
 voltage and current of the VI-TEG depending on the probe distance (1-10
 mm) and the probe power (0.5-5 W/cm2) under ultrasound at 20
 kHz.Fig.
 S12.zipData S16 (Fig. S13, 15,
 17)VI-TEG under the rat
 skin. It includes raw output data measured output voltage and current of
 the implanted VI-TEG, and charging capacitor (capacitance: 0.1 mF) under
 ultrasound at 20 kHz.Fig. S13, 15,
 17.zipData S17 (Fig. S14,
 16)Raw output data measured
 voltage and current of the VI-TEG in bovine serum solution at 5 mm probe
 distance under ultrasound at 20 kHz.Fig. S14,
 16.zipData S18 (Fig.
 S18)Raw output data measured
 voltage and current of the VI-TEG implanted at 0.5, 1.0 cm depth inside
 the porcine tissue under ultrasound at 20 kHz.Fig.
 S18.zip