Results 91 to 100 of about 17,066 (292)
Accurate extraction of large electromechanical coupling in piezoelectric MEMS resonators [PDF]
, 2019 Recent advancements in the field of piezoelectric micro-resonators have produced devices, such as lithium niobate laterally vibrating resonators, with very high electromechanical coupling factors (k
Lu, Ruochen +4 more
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Flexible Dielectric Acoustic Resonator Patch for Tissue Regeneration
Advanced Materials, EarlyView.A flexible dielectric acoustic resonator patch enables MHz‐range ultrasound generation through resonance amplification without using piezoelectric materials. Conformal integration on a curved substrate allows efficient acoustic delivery to tissue‐mimicking environments.
Donyoung Kang +7 more
wiley +1 more source
Electromechanical Coupling Factors of Novel 0–3–0 Composites Based on PMN–xPT Single Crystals [PDF]
, 2011 This paper is devoted to the problem of the electromechanical coupling of advanced composites based on relaxor-ferroelectric single crystals with large piezoelectric activity.
Bisegna, P +9 more
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Sensors, 2017 The input electrical impedance behaves as a capacitive when a piezoelectric transducer is excited near its resonance frequency. In order to increase the energy transmission efficiency, a series or parallel inductor should be used to compensate the ...
Shuyu Lin, Jie Xu
doaj +1 more source
Sub‐Nanometer Curvature Unlocks Quantum Orbital Flexoelectricity in Graphene
Advanced Materials, EarlyView.In self‐assembled, reproducible, large‐area, quasi‐pristine graphene nanowrinkles, extreme curvature forces out‐of‐plane π‐electrons toward hybridization, driving a transition from classical to quantum orbital flexoelectricity. As curvature approaches the fundamental physical limit set by the C─C bond length, the resulting polarization increases by ...
Sathvik Ajay Iyengar +8 more
wiley +1 more source
Advanced Materials, EarlyView.Field‐programmed anisotropy imparts material‐level intelligence to soft composites. Magnetic torque dynamics drive magneto‐piezoelectric nanowires from random dispersion into deterministic axial alignment. The resulting hierarchical percolation networks confine electromechanical coupling to specific axes and intrinsically decouple superposed force ...
Yubin Kim +9 more
wiley +1 more source
Study of Electromechanical Coupling Efficiency of Piezoelectricity [PDF]
, 2010 本篇論文在於整理關於機電耦合係數的國際期刊論文，共整理了八篇。以動機、目標、方法、重要結果為整理重點，以方便其他研究學者進行對機電耦合係數的研究。本文亦把相關基礎理論，如壓電理論、機電耦合係數之計算、電彈理論、表面彈性波理論做簡要說明，讓一般研究者也可以輕易入門。壓電材料的機電轉換能力一般而言多由機電耦合係數(Electromechanical coupling coefficient，EMCC)所決定。其定義為在輸入能量全為介電能(機械能)的情況下，機電耦合係數的平方等於儲存在壓電材料內可由輸入介電能(
鍾昇達, Chung, Sheng Ta
core
Reconfigurable Ferroelectric‐Like Two‐Dimensional Electron Gas at Room Temperature
Advanced Materials, EarlyView.We demonstrate the realization of a novel ferroelectric‐like two‐dimensional electron gas (2DEG) based on the epitaxial interface between SrO‐terminate SrTiO3 and ferroeletric KNb0.5Na0.5O3${\rm KNb}_{0.5}{\rm Na}_{0.5}{\rm O}_3$ thin films. We show nonvolatile control of the transport properties enabling spatially reconfigurable devices in which ...
Martando Rath +16 more
wiley +1 more source
Advanced Materials, EarlyView.Coupled materials design enables a monolithic fiber that integrates complementary sensing regimes into a single wearable strand. By preserving informative signal features across subtle physiological deformation, large body motion, and mixed mechanical inputs, the dual‐gradient architecture generates synchronized, less redundant outputs that improve ...
Yunheum Lee +13 more
wiley +1 more source
Electromechanical Coupling in Two-Dimensional Materials [PDF]
Electromechanical coupling has applications in electronics, biomedical sensors, and energy harvesting, for example. Two-dimensional materials have emerged as particularly promising candidates for exploiting electromechanical coupling due to their ...
Jangir, Arun
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