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Study of a 2DOF bistable energy harvester with variable potential well for ultra-low frequency vibration energy harvesting.
Rev Sci Instrum
January 2025
Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen, Fujian 361005, China.
A two-degree-of-freedom bistable energy harvester with a spring-magnet oscillator designed for ultra-low frequency vibration energy harvesting is presented in this paper. It combines magnetic plucking frequency upconversion and a variable potential function to achieve a high-efficiency response while also being suitably installed for applications with spatial limitations. A lumped parameter model of the piezoelectric energy harvester and the magnetic dipoles is applied to develop the theoretical model for the system.
View Article and Find Full Text PDFGBR assisted Onlay bone grafting for the posterior maxillary horizontal ridge augmentation: a case report and literature review.
Front Bioeng Biotechnol
January 2025
Hospital of Stomatogy, Jilin University, Changchun, China.
The posterior mandible is the primary area for occlusal function. However, long-term tooth loss in the posterior mandible often leads to rapid absorption of both buccal and lingual trabecular bone plates and subsequent atrophy of the alveolar ridge. This ultimately results in horizontal bone deficiencies that complicate achieving an optimal three-dimensional placement for dental implants.
View Article and Find Full Text PDFMicrowave Surface and Lamb Waves in a Thin Diamond Plate: Experimental and Theoretical Investigation.
Ultrasonics
January 2025
Federal State Budgetary Institution , Technological Institute for Superhard and Novel Carbon Materials of National Research Centre, Kurchatov Institute, 108840 Moscow, Troitsk, Russian Federation.
Microwave surface and Lamb waves in a multilayered piezoelectric "Al-IDT/(AlSc)N/(001)[110] diamond" structure designed as a SAW resonator were studied using both the experimental and modeling methods. In this structure, it is possible to generate Rayleigh, surface horizontal (SH) and Lamb waves simultaneously. The successful excitation of Lamb waves at operating frequencies up to 20 GHz has been obtained.
View Article and Find Full Text PDFHigh-Performance Mechano-Sensitive Piezoelectric Nanogenerator from Post-Treated Nylon-11,11 Textiles for Energy Harvesting and Human Motion Monitoring.
ACS Appl Mater Interfaces
January 2025
School of Materials Science and Engineering, Henan Key Laboratory of Advanced Nylon Materials and Application, Zhengzhou University, Zhengzhou 450001, China.
Piezoelectric polymer textiles offer distinct advantages in the fabrication of wearable nanogenerators (NGs). One effective strategy to enhance the output capacity of NGs is to modulate the piezoelectric performance of the textiles. This paper focuses on further improving the piezoelectric properties of nylon-11,11 textiles through post-drawing and annealing treatments.
View Article and Find Full Text PDFUnidirectional Polyvinylidene/Copper-Impregnated Nanohydroxyapatite Composite Membrane Prepared by Electrospinning with Piezoelectricity and Biocompatibility for Potential Ligament Repair.
Polymers (Basel)
January 2025
Advanced Medical Devices and Composites Laboratory, Department of Fiber and Composite Materials, Feng Chia University, Taichung 407, Taiwan.
Ligament tears can strongly influence an individual's daily life and ability to engage in physical activities. It is essential to develop artificial scaffolds for ligament repairs in order to effectively restore damaged ligaments. In this experiment, the objective was to evaluate fibrous membranes as scaffolds for ligament repair.
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