Electrostatic Assembly of Laminated Transparent Piezoelectrets for Epidermal and Implantable Electronics

Xu, Zisheng; Xiao, Wen‐Jing; Mo, Xiwei; Lin, Shizhe; Chen, Shuwen; Chen, Jianping; Pan, Yuan; Jin, Hongrun; Duan, Jiangjiang; Huang, Liang; Huang, Long‐Biao; Xie, Jingru; Yi, Fengtao; Hu, Bin; Zhou, Jun

doi:10.1016/j.nanoen.2021.106450

Cited by 31 publications

(20 citation statements)

References 48 publications

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“…Previous studies on these electret/dielectric/electret sandwich‐shaped systems have demonstrated that strain concentrates on the electret layer, and a dielectric layer with low relative permittivities can enhance the piezo‐response. [ 41 ] The high elastic moduli ( k dielectric ) and low relative permittivities dielectric layer (PVB with cylindroid PHA structure) incorporated with a pair of low elastic moduli ( k electret ) FEP electrets is well satisfied the above requirements. Moreover, this design allows stress concentrated in the cylindroid PHA structure and enables enhanced strain occurs in the electret layer compared with the bulk PVB segment ( Figure a).…”

Section: Resultsmentioning

confidence: 99%

Hybrid‐Piezoelectret Based Highly Efficient Ultrasonic Energy Harvester for Implantable Electronics

Xiao

Chen

et al. 2022

Adv Funct Materials

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Implantable ultrasonic energy harvesters that scavenge wireless mechanic energy from ultrasound own remarkable potential in advanced medical protocols for neuroprosthetics, wireless power, biosensor, etc. The main challenge for this kind of device is to achieve high‐efficiency energy conversion in a weak ultrasonic pressure field. Here, a multilayered piezoelectret with strain enhanced piezoelectricity by introducing a parallel‐connected air hole array in an interdielectric layer sandwiched between a pair of electrets for an efficient ultrasonic energy harvester is presented. This device delivers a remarkable peak output power around 13.13 mW and short‐circuits current around 2.2 mA when implanted into tissues at 5~10 mm under an ultrasonic probe setup at 25 mW cm−2, which is higher than the required power threshold of bioelectronic devices and current threshold of nerve stimulation. Furthermore, the feasibility of supplying power to implantable bioelectronics and working as neuroproteins for peripheral nerve stimulation are both demonstrated. It is anticipated that this highly efficient, easily fabricated, and biocompatible device will potentially enable applications for multifunctional and advanced implantable bioelectronics in the next generation of diagnosis and therapy.

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Section: Resultsmentioning

confidence: 99%

Hybrid‐Piezoelectret Based Highly Efficient Ultrasonic Energy Harvester for Implantable Electronics

Xiao

Chen

et al. 2022

Adv Funct Materials

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“…Furthermore, introducing pores into polymers to form piezoelectrets through polarization is another effective method to obtain organic piezoelectric materials with high performance. [333][334][335][336][337] Interestingly, Yuan et al recently reported a 3D-printed multilayer b-phase P(VDF-TrFE) copolymer which does not require high-temperature annealing or complicated transfer processes to yield high performance and exhibits a much higher effective piezoelectric coefficient output (d 33 B 130 pC N À1 for six 10 mm layers). 192 This approach provides yet another convenient method for the preparation of high-performance wearable devices.…”

Section: Organic Piezoelectric Materialsmentioning

confidence: 99%

Piezoelectric nanogenerators for personalized healthcare

et al. 2022

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“…Furthermore, according to the U.S. Food and Drug Administration's regulation, the safety threshold of US in the human body is 720 mW/cm 2 (23), which is dozens of times greater than that of radio waves (10 mW/cm 2 ) (24). These two factors enable ultrasonic wireless energy-harvesting technology's unique advantages in biomedical applications in contrast to other wireless power transmission technologies, such as electromagnetic (25)(26)(27), piezoelectric (20,21), triboelectric (28)(29)(30), electrostatic (31)(32)(33), biofuel cell (34,35), thermoelectric (36,37), and photovoltaic (38,39) (table S1).…”

Section: Introductionmentioning

confidence: 99%

Piezoelectric ultrasound energy–harvesting device for deep brain stimulation and analgesia applications

et al. 2022

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Supplying wireless power is a challenging technical problem of great importance for implantable biomedical devices. Here, we introduce a novel implantable piezoelectric ultrasound energy–harvesting device based on Sm-doped Pb(Mg 1/3 Nb 2/3 )O 3 -PbTiO 3 (Sm-PMN-PT) single crystal. The output power density of this device can reach up to 1.1 W/cm 2 in vitro, which is 18 times higher than the previous record (60 mW/cm 2 ). After being implanted in the rat brain, under 1-MHz ultrasound with a safe intensity of 212 mW/cm 2 , the as-developed device can produce an instantaneous effective output power of 280 μW, which can immediately activate the periaqueductal gray brain area. The rat electrophysiological experiments under anesthesia and behavioral experiments demonstrate that our wireless-powered device is well qualified for deep brain stimulation and analgesia applications. These encouraging results provide new insights into the development of implantable devices in the future.

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Electrostatic Assembly of Laminated Transparent Piezoelectrets for Epidermal and Implantable Electronics

Cited by 31 publications

References 48 publications

Hybrid‐Piezoelectret Based Highly Efficient Ultrasonic Energy Harvester for Implantable Electronics

Hybrid‐Piezoelectret Based Highly Efficient Ultrasonic Energy Harvester for Implantable Electronics

Piezoelectric nanogenerators for personalized healthcare

Piezoelectric ultrasound energy–harvesting device for deep brain stimulation and analgesia applications

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