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Rapid advances in sensing technologies are leading to the development of integrated wearable electronics for biomedical applications. Piezoelectric materials have great potential for implantable devices because of their self-powered sensing capacities. The soft and highly deformable surfaces of most tissues in the human body, however, restrict the wide use of piezoelectric materials, which feature low stretchability. Flexible piezoelectric polyvinylidene fluoride films that could conformably integrate with human bodies would have advantages in health monitoring. Here, a Kirigami technique with linear cut patterns has been employed to design a stretchable piezoelectric sensor with enhanced piezoelectricity. A parametric Finite Element Analysis study is first performed to investigate its mechanical behaviour, followed by experiments. An inter-segment electrode connection approach is proposed to further enhance the piezoelectric performance of the sensor. The voltage output shows superior performance with 2.6 times improvement compared to conventionally continuous electrodes. Dynamic tests with a range of frequencies and strains are performed to validate the sensor design. With its high performance in large strain measurements, the Kirigami-based sensing system shows promise in stretchable electronics for biomedical devices.Წაიკითხე მეტი -
This post is also available in: Français (French) Italiano (Italian) Deutsch (German)Learn how piezoelectricity produces an electric charge by applying mechanical stress to a piezoelectric material.Piezo what? Piezoelectricity sounds like a lot to take in, but it’s simple to understand. The word piezoelectric originates from the Greek word piezein, which literally means to squeeze or press. Instead of squeezing grapes to make wine, we’re squeezing crystals to make an electric current! Piezoelectricity is in a ton of everyday electronic devices, from quartz watches to speakers and microphones.Წაიკითხე მეტი -
The low output current density of piezoelectric nanogenerators (PENGs) severely restricts their application for ambient mechanical energy harvest. This has been a key challenge in the development of PENG. Here, to conquer this, based on a piezoelectric material with high piezoelectric coefficient (Sm-PMN-PT), a new design of PENG with a three-dimensional intercalation electrode (IENG) is proposed. By creating many boundary interfaces inside the piezoelectric material, the total amount of surface polarization charges increased, which contributes to an increased current density. The IENG can output a maximum peak short-circuit current of 320 μA, and the corresponding current density 290 μA cm−2 is 1.93 and 1.61 times the record values of PENG and triboelectric nanogenerator (TENG), respectively. It can also charge a 1 μF capacitor from 0 V to 8 V in 21 cycles, and the equivalent surface charge density 1690 μC m−2 is 1.35 times the record value of TENG.Წაიკითხე მეტი -
Gas shielded welding wire is an essential component in the welding industry, providing a clean anᲬაიკითხე მეტი -
As one of the largest manufacturers of welding wire, our company is committed to producing high-quality products that meet the evolving needs of the welding industry.Წაიკითხე მეტი -
Welding Electrodes Production Factory: Meeting the Demand for Quality and Reliable Welding Rods For over 20 years, our welding electrodes production factory has been meeting the needs of industries that rely on strong and durable welding rods. Our commitment to quality and precision has made us a trusted name in the welding industry, and our team of professionals ensures that every welding electrode that leaves our factory meets the highest standards of excellence.Წაიკითხე მეტი -
ძირითადი ლითონის თვისებები. თქვენ უნდა იცოდეთ რა ტიპის ლითონი, რა სისქის ლითონზე გამოიყენებთ, ძირითადი ლითონის სისქე, ფორმა და სახსრების მორგება.Წაიკითხე მეტი -
კაცობრიობის ცივილიზაციის ხანგრძლივ ისტორიაში, დაწყებული „ჭედური შედუღებიდან“, რომლის დროსაც მჭედლები განუწყვეტლივ აჭედავდნენ წითელ ლითონებს მათ დასაკავშირებლად შუა საუკუნეებში,Წაიკითხე მეტი
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