KNN-based frequency-adjustable ferroelectric heterojunction and biomedical applications

Abstract High-performance lead-free K 0.5 Na 0.5 NbO 3 piezoelectric ceramics present a practical alternative to lead-containing counterparts by effectively reducing potential environmental hazards. This advancement is particularly relevant to the development of ferroelectric heterojunction devices for biomedical applications. Here, we design and fabricate a frequency-adjustable ferroelectric heterojunction based on the developed K 0.5 Na 0.5 NbO 3 piezoelectric ceramics with a high piezoelectric coefficient ( d 33 = 680 pC/N). By leveraging flexible encapsulation, the heterojunction achieves miniaturization ( φ = 13.3 mm, h = 2.28 mm) and suitability for implantation. After penetrating the rat skull, the…

• NN
  National Natural Science Foundation of China

  Award: U22A20259
• HU
  Huazhong University of Science and Technology
• NS
  Natural Science Foundation of Hubei Province

  Award: JCZRYB202400863
• WU
  Wuhan University
• FR
  Fundamental Research Funds for the Central Universities

  Award: 2042023kf0182
• RH
  Renmin Hospital of Wuhan University

  Award: JCRCYG-2022-001