Piezoelectric film11/10/2023 ![]() Finally, the review projects the prospects for doped piezoelectric film fabrication in terms of the selection of the substrate and the preparation of doped piezoelectric ceramics. The research comprehensively introduces the results and progress, including for 5 types of piezoelectric thin films related to BaTiO 3, (K,Na)NbO 3, PbTiO 3 and Pb(Zr,Ti)O 3, composite solid solutions and ZnO, and predicts the development prospects for the solvothermal process in piezoelectric film fabrication. In the present review, the development of piezoelectric thin films fabricated by the solvothermal process is introduced from the aspects of film fabrication technologies, devices and characteristics. The prepared thin films do not need to be treated with high temperature, and this process has been widely applied in the fields of piezoelectric, ferroelectric and oxide thin films. Professor Jacob Robinson, inspired by his background in photonics, finds it exciting that they can design devices and systems using materials that have never existed before, opening the door to unforeseen applications beyond the field of bioelectronics.The solvothermal process, a relatively simple process, has been regarded as one of the most attractive and promising film preparation methods. This breakthrough material not only has the potential to revolutionize neurotechnology but also offers applications in sensing and memory within electronics. As a proof of concept, the researchers used the material to stimulate peripheral nerves in rats and demonstrated its potential for use in neuroprosthetics, showing that it could restore function in a severed nerve. The result was a thin layer of less than 200 nanometers, making the entire device small enough for potential injection into the body. They achieved this by introducing platinum, hafnium oxide, and zinc oxide layers on top of the original magnetoelectric film, thereby creating a nonlinear relationship between the electric and magnetic fields. To overcome this, the researchers needed to engineer a material that could generate electric signals suitable for cell response. However, the electric signals produced by most magnetoelectric materials are too fast and uniform for neurons to interpret. This conversion from magnetic to electric fields is a crucial aspect of the material’s functionality. When subjected to a magnetic field, the magnetorestrictive element vibrates, leading to a change in shape that generates electricity through the piezoelectric material. The researchers began with a magnetoelectric material consisting of a piezoelectric layer of lead zirconium titanate sandwiched between two magnetorestrictive layers of metallic glass alloys known as Metglas, which can be magnetized and demagnetized rapidly. ![]() Moreover, the versatility of magnetoelectric materials extends to computing, sensing, electronics, and various other fields, offering a foundation for advanced materials design that can drive innovation more broadly. ![]() As the fabricated sensor uses a piezoelectric material, the. Instead of implanting complex neurostimulation devices, small amounts of this material can be injected at the target site. The piezoelectric film was cut using a kirigami pattern, and the structural distortion of each cut segment resulted in stretchability. The implications of this material are significant for neurostimulation treatments. This achievement, detailed in a study published in Nature Materials, opens up new possibilities for precisely stimulating neurons remotely and repairing damaged nerves. However, a team led by Rice University neuroengineer Jacob Robinson has developed a groundbreaking magnetoelectric material that not only addresses this issue but also performs the magnetic-to-electric conversion 120 times faster than comparable materials. The challenge has been that neurons struggle to respond to the resulting electric signals. ![]() Researchers have long recognized the therapeutic potential of magnetoelectric materials that can convert magnetic fields into electric fields to stimulate neural tissue and treat neurological disorders.
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