Results 41 to 50 of about 1,659 (185)

Transducers Across Scales and Frequencies: A System‐Level Framework for Multiphysics Integration and Co‐Design

Advanced Materials Technologies, EarlyView.
Transducers convert physical signals into electrical and optical representations, yet each mechanism is bounded by intrinsic trade‐offs across bandwidth, sensitivity, speed, and energy. This review maps transduction mechanisms across physical scale and frequency, showing how heterogeneous integration and multiphysics co‐design transform isolated ...
Aolei Xu, Mengyao Xiao, Zhouli Sui, Yinpeng Wang, Daoye Zheng, Yuxin Liu, Luwei Wang, Huajun Liu, Chengkuo Lee   +8 more
wiley   +1 more source

Slow sound mode prediction and band structure calculation in 1D phononic crystal nanobeams using an artificial neural network

Science Progress
Phononic crystals, which are artificial crystals formed by the periodic arrangement of materials with different elastic coefficients in space, can display modulated sound waves propagating within them.
Fu-Li Hsiao, Yen-Tung Yang, Wen-Kai Lin, Ying-Pin Tsai   +3 more
doaj   +1 more source

Type‐II Dirac Fermions in Monolayer In2O: Interplay of Magnetotransport, Spin Hall Effect, and Superconductivity

Advanced Science, EarlyView.
First‐principles calculations reveal that monolayer In2O${\rm In}_2{\rm O}$ hosts type‐II Dirac fermions near the Fermi level, which split into Weyl points under spin‐orbit coupling. The material exhibits negative and giant magnetoresistance, a pronounced spin Hall effect, and phonon‐mediated superconductivity at 1.5 K, establishing it as a unique ...
Qing‐Bo Liu, De‐Ming Feng, Wen‐Neng Zhao, Yu‐Yang Zhao, Lun Xiong, Xing‐Yi Tan, Hua‐Hua Fu   +6 more
wiley   +1 more source

Defect Driven Electronic Structure Reconfiguration and Hierarchical Phonon Suppression in Ag2Se Thermoelectrics

Advanced Science, EarlyView.
Indium substitution in Ag2Se nanocrystals simultaneously tailors electronic structure and lattice dynamics. Fermi‐level upshift and band‐gap narrowing enhance electrical transport, while defect‐induced lattice softening intensifies phonon scattering and suppresses lattice thermal conductivity.
Yineng Gou, Mengyao Li, Fang Lyu, Xiaolong Sun, Muyang Huang, Wenhao Xie, Liangwei Hu, Wei Cao, Yue Hou, Yong Liu, Andreu Cabot, Ziyu Wang   +11 more
wiley   +1 more source

An enhanced novel surface plasmon resonance sensor employing perovskite nanomaterial and bismuth ferrite to identify different ethanol concentrations

Scientific Reports
This study presents a novel surface plasmon resonance (SPR) biosensor composed of silver (Ag), bismuth ferrite (BiFeO3), nickel (Ni), and perovskite nanomaterial (MAPbBr3).
Malek G. Daher, Mostafa R. Abukhadra, Samer M. Srour, Emad Solouma, Stefano Bellucci, Haifa A. Alqhtani, Hussein A. Elsayed, Ahmed Mehaney   +7 more
doaj   +1 more source

Phononic crystals and elastodynamics: Some relevant points

AIP Advances, 2014
In the present paper we review briefly some of the first works on wave propagation in phononic crystals emphasizing the conditions for the creation of acoustic band-gaps and the role of resonances to the band-gap creation. We show that useful conclusions
N. Aravantinos-Zafiris, M. M. Sigalas, M. Kafesaki, E. N. Economou   +3 more
doaj   +1 more source

Reem-Shape Phononic Crystal for Q Anchor Enhancement of Thin-Film-Piezoelectric-on-Si MEMS Resonator

Micromachines, 2023
This paper proposes a reem-shaped phononic crystal for the performance enhancement of TPoS resonators. The proposed phononic crystal offers an ultra-wide acoustic band gap that prevents energy leakage through the supporting substrate upon its placement ...
Mohammed Awad, Temesgen Bailie Workie, Jing-Fu Bao, Ken-ya Hashimoto   +3 more
doaj   +1 more source

Observation of Excitonic Instability in a Monolayer Ta2NiSe5 With Strain Disorder

Advanced Science, EarlyView.
Monolayer Ta2${\rm Ta}_2$NiSe5${\rm NiSe}_5$ sustains an excitonic insulating phase up to 190 K, with Raman signatures of gap opening and critical excitonic fluctuations. Thickness‐independent large gap ratios highlight strong exciton‐phonon coupling, while substrate‐induced strain disorder depresses Tc, establishing monolayer Ta2${\rm Ta}_2$NiSe5${\rm
So Young Kim, Kwangrae Kim, Dowook Kim, Ji Eun Lee, Jieun Seok, Chang Il Kwon, Jo Hyun Yun, Chang‐Jong Kang, Jae Hoon Kim, H. W. Yeom, Tae‐Hwan Kim, Jonghwan Kim, B. J. Kim, Jun Sung Kim   +13 more
wiley   +1 more source

Formation of Bragg Band Gaps in Anisotropic Phononic Crystals Analyzed With the Empty Lattice Model

Crystals, 2016
Bragg band gaps of phononic crystals generally, but not always, open at Brillouin zone boundaries. The commonly accepted explanation stems from the empty lattice model: assuming a small material contrast between the constituents of the unit cell, avoided
Yan-Feng Wang, Alexei A. Maznev, Vincent Laude   +2 more
doaj   +1 more source

Layer‐Dependent Phonon Polaritons in hBN Resolved by Photo‐Induced Force Spectroscopy

Advanced Science, EarlyView.
Layer‐dependent phonon polariton resonances in hexagonal boron nitride are systematically investigated using photo‐induced force microscopy. The in‐plane resonance exhibits a blueshift, while the out‐of‐plane resonance shows a redshift with increasing thickness. These results establish layer number as a key parameter for tuning polaritonic responses in
Amin Hajarian, Jiwoo Seo, SungWoo Nam
wiley   +1 more source