Photoacoustic and piezo-ultrasound hybrid-induced energy transfer for 3D twining wireless multifunctional implants

Abstract

A hybrid-induced energy transfer strategy using photoacoustic and piezo-ultrasound technology was proposed to achieve a 3D twining multifunctional implant.

Ferroelectrically augmented contact electrification enables efficient acoustic energy transfer through liquid and solid media

“…Therefore, a precise focus was considered to be an important factor of WET for delivering power efficiently. 19,21,23,27,29,30,42 However, it is challenging to transfer energy with such a good focus in every situation. Therefore, a high focus misalignment tolerance is influential in evaluating the AET receiver performance.…”

“…20,21 Since the piezoelectric receiver acquires sound waves and converts them into electricity, the structural design is crucial for effective energy conversion. 19,20,22–28 In the piezoelectric scheme, the receiver is generally designed to resonate at the frequency of the incoming acoustic wave, which is far from mode-free. Since the piezoelectric receiver can harvest acoustic wave efficiently only at a certain frequency, there are constraints of design and dimensions.…”

Ultrasound-mediated triboelectric nanogenerator for powering on-demand transient electronics

“…Photovoltaic and thermoelectric in vivo energy harvesters were introduced as sources of power for transient electronics, but their use is limited by lack of light sources and constant body temperature, respectively (4,5). On the other hand, the biodegradability of piezoelectric catalysts [i.e., PbZr x Ti 1-x O 3 (PZT) and barium titanate (BTO)] is unverified, limiting the use piezoelectric nanogenerators in transient electronics (6)(7)(8). Triboelectric nanogenerators (TENGs), on the basis of the coupling effect of contact electrification and electrostatic induction, are an emerging technology with great potential for powering transient IMDs.…”

Multichannel Piezo‐Ultrasound Implant with Hybrid Waterborne Acoustic Metastructure for Selective Wireless Energy Transfer at Megahertz Frequencies

“…[6] Piezoelectric and triboelectric US energy harvesters (UEHs) for implants have been demonstrated. [6,7,14,18] However, most of these UEHs used a single US channel, which greatly limited system versatility. For example, to meet the extensive requirements for the next generation of personalized BEDs, future systems will require more functions, powerful wireless communication, and multicontrol capabilities, which might be addressed in a frequency-selectable multichannel UET strategy.…”