Results 51 to 60 of about 3,055,035 (377)

Air‐Pressure–Actuated Vibroacoustic Metamaterial With Tunable Bandgap: Design, Modeling, and Characterization

Advanced Engineering Materials, EarlyView.
This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal, Michael M. Becker, Sarah C. L. Fischer   +2 more
wiley   +1 more source

Applied Study on Piezoelectric Properties of Ferroelectric Nanomaterials

Chemical Engineering Transactions, 2017
This paper presents the theoretical model d33(D) for the size dependence of the piezoelectric coefficient of the ferroelectric lead titanate PbTiO3 nano particles, where D is the diameter of nano particles.
Shuai Zhang, Lei Chen, Ruixin An, Wanli Zhu, Songying Zhao   +4 more
doaj   +1 more source

Phonon-Coupled Electron Tunneling in Two and Three-Dimensional Tunneling Configurations

, 1999
We treat a tunneling electron coupled to acoustical phonons through a realistic electron phonon interaction: deformation potential and piezoelectric, in two or three-dimensional tunneling configurations.
A. J. Leggett, A. O. Caldeira, A. O. Caldeira, A. O. Caldeira, A. R. Hutson, B. Laikhtman, B. N. J. Persson, B. Y. Gelfand, C. L. Itzykson, D. Esteve, D. V. Averin, E. Pazy, E. Pazy, H. Bateman, M. H. Devoret, M. Ueda, M. Ueda, P. Guéret, R. Bruinsma, S. M. Girvin, T. K. Mitra, V. M. Babich, V. M. Édel’shteĭn, Yu. V. Nazarov, Yu. V. Nazarov   +24 more
core   +1 more source

Piezoelectric Charge Coefficient of Halide Perovskites

Materials
Halide perovskites are an emerging family of piezoelectric and ferroelectric materials. These materials can exist in bulk, single-crystal, and thin-film forms. In this article, we review the piezoelectric charge coefficient (dij) of single crystals, thin films, and dimension-tuned halide perovskites based on different measurement methods.
Muddam, Raja Sekhar, Sinclair, Joseph, Krishnan Jagadamma, Lethy   +2 more
openaire   +3 more sources

Hot‐Film and Calorimetric Methods With Transient Heating for Measurement of High Biofluid Flow Rate

Advanced Functional Materials, EarlyView.
Accurate measurement of biofluid flow rate is vital for clinical diagnostics. We propose a transient heating strategy using short thermal pulses and peak temperature tracking to enhance the flow sensitivity of the hot‐Film and calorimetric methods. Simulations show how optimal heating time maximizes sensitivity across flow rates.
Yuanting Wei, Shupeng Li, Kyung Rok Pyun, Tianyu Yang, Bosung Kim, Haotian Yang, John A. Rogers, Yonggang Huang, Haohui Zhang   +8 more
wiley   +1 more source

Ultra-high energy harvester performance in KNN-based textured piezoceramics via multiscale reconfiguration design

Journal of Advanced Ceramics
The lower electromechanical performance of lead-free piezoelectric materials remains a critical bottleneck impeding their ability to replace lead-based materials in energy harvesting.
Caixia Zhu, Jin Qian, Luomeng Tang, Cheng Shi, Bo Shen, Jiwei Zhai   +5 more
doaj   +1 more source

Piezoelectric effect and electroactive phase nucleation in self-standing films of unpoled PVDF nanocomposite films [PDF]

, 2018
Novel polymer-based piezoelectric nanocomposites with enhanced electromechanical properties open new opportunities for the development of wearable energy harvesters and sensors.
Ballirano, Paolo, Chandraiahgari, CHANDRAKANTH REDDY, DE BELLIS, Giovanni, Fortunato, Marco, Sarto, Francesca, Sarto, Maria Sabrina, Tamburrano, Alessio   +6 more
core   +1 more source

Anomalous Pressure‐Temperature Ultrahigh Sensitivities in Atomically Engineered Carbonitride MXenes for Multifunctional Wearable Human–Machine Interfaces: Joint Computational–Experimental Elucidations

Advanced Functional Materials, EarlyView.
Atomically engineered layered 2D Ti3CNTz carbonitride MXene exhibits ultrahigh heat and pressure sensitivity, enabling dual‐mode sensors with 300%–400% performance enhancement and durability for real‐time health‐monitoring interface devices. Precise nitrogen incorporation (e.g., Ti3C1.8N0.2Tz) boosts conductivity, enhancing temperature response, while ...
Debananda Mohapatra, Ju‐Hyoung Han, Hyun Jin Kang, Jeong Eun Byun, Seonghun Lee, Sanghyuk Lee, Yeseul Son, Jaeeun Park, Tae Joo Shin, Youngho Kang, Jung Woo Lee, Soon‐Yong Kwon, Soo‐Hyun Kim   +12 more
wiley   +1 more source

Understanding and tuning negative longitudinal piezoelectricity in hafnia

npj Computational Materials
Most piezoelectric materials exhibit a positive longitudinal piezoelectric effect (PLPE), while a negative longitudinal piezoelectric effect (NLPE) is rarely reported or paid much attention.
Huirong Jing, Chaohong Guan, Hong Zhu
doaj   +1 more source

Performance of transducers with segmented piezoelectric stacks using materials with high electromechanical coupling coefficient

, 2013
Underwater acoustic transducers often include a stack of thickness polarized piezoelectric material pieces of alternating polarity interspersed with electrodes, bonded together and electrically connected in parallel.
Markley, Douglas C., Meyer, Richard J., Thompson, Stephen C.   +2 more
core   +1 more source