Results 71 to 80 of about 594,359 (210)

Quartz tuning fork embedded off-beam quartz-enhanced photoacoustic spectroscopy

Optics Letters, 2019
In order to achieve a high acoustic coupling strength and detection sensitivity and to simplify the assembly and alignment process in quartz-enhanced photoacoustic spectroscopy (QEPAS) technique, a novel quartz tuning fork (QTF) embedded off-beam QEPAS (E-OB-QEPAS) spectrophone was proposed.
Lien Hu, Chuantao Zheng, Jie Zheng, Yiding Wang, Frank K. Tittel   +4 more
openaire   +2 more sources

Mode‐Resolved Phonon Dynamics Under Chemical Pressure in SnTe Thermoelectrics

Advanced Science, EarlyView.
Chemical pressure reshapes low‐energy optical phonons in SnTe, altering their dispersion and scattering with heat‐carrying acoustic modes. Positive and negative pressure states modify phonon frequencies and lifetimes in distinct ways, revealing how mode‐selective lattice perturbations regulate acoustic–optical interactions and suppress lattice thermal ...
Zhihao Li, Jianhong Hu, Panpan Peng, Peng Cao, Hui Zhang, Yujie Zong, Yanhui Wu, Hongchao Wang   +7 more
wiley   +1 more source

One-step quartz-MEMS micro-fabrication strategy for a grooved tuning fork

Nanotechnology and Precision Engineering
Grooved tuning forks with hierarchical structures have become some of the most widely used piezoelectric quartz microelectromechanical system devices; however, fabricating these devices requires multi-step processes due to the complexity of etching of ...
Yide Dong, Chunyan Yin, Guangbin Dou, Litao Sun   +3 more
doaj   +1 more source

Design Optimization of a Compact Double-Ended-Tuning-Fork-Based Resonant Accelerometer for Smart Spindle Applications

Micromachines, 2019
With the rapid developments of the Industrial Era 4.0, numerous sensors have been employed to facilitate and monitor the quality of machining processes.
Yu-Hsuan Chen, Wei-Chang Li, Xi-Wen Xiao, Chieh-Cheng Yang, Chien-Hao Liu   +4 more
doaj   +1 more source

Balancing Shading and Resistive Losses: 33% Efficient Perovskite/Silicon Tandem Solar Cells via Front‐Electrode Engineering

Advanced Science, EarlyView.
Front‐electrode co‐optimization combining tungsten‐doped indium oxide (IWO) transparent electrode and simulation‐guided metal grid geometry boosts perovskite/silicon tandem solar cell performance. The low work function IWO improves interfacial carrier extraction, while tailored grid parameters balance optical shading and electrical resistive losses ...
Yuhui Ji, Fei Wang, Junjun Li, Yunren Luo, Haichuan Zhang, Qi Liu, Pengxu Chen, Kexin Yao, Qiang Shi, Fanying Meng, Liping Zhang, Chen Yang, Jiakai Liu, Zhengxin Liu, Wenzhu Liu, Jian Yu   +15 more
wiley   +1 more source

Optical Access to Dark Excitons Via Spin–Phonon Fano Interference

Advanced Science, EarlyView.
Dark excitons in quantum dots neither absorb nor emit light and stay hidden from optical spectroscopy. Quantum interference now reveals them: light scattered by acoustic phonons interferes with a phonon‐assisted spin flip between bright and dark exciton, carving a Fano dip into the spectrum whose position gives the bright–dark splitting. Magnetic field,
Janina J. Schindler, Katja Barthelmi, Mikhail M. Glazov, Carlo Sgroi, Sven Scholz, Arne Ludwig, Andreas D. Wieck, Jörg Debus   +7 more
wiley   +1 more source

Detection of Molecular Oxygen at Low Concentrations Using Quartz Enhanced Photoacoustic Spectroscopy

Sensors, 2010
Molecular oxygen is detected at low concentrations using photoacoustic spectroscopy despite its unfavorable photoacoustic properties. The system consists of a seed laser diode, a tapered amplifier and a quartz tuning fork based spectrophone, thus ...
Andreas Pohlkötter, Michael Köhring, Ulrike Willer, Wolfgang Schade   +3 more
doaj   +1 more source

Phosphonium Ionic Liquids for Electrochemical Energy Storage: Structure–Property–Interphase Relationships and Design Rule

Advanced Science, EarlyView.
Phosphonium ionic liquids offer a versatile platform for safer and more durable energy storage. This Review connects cation–anion structure with solvation, ion transport, electrochemical stability, and interphase formation across diverse battery chemistries.
Amir Haghipour, Ishanka Thennakoon, Aishwaryaba Jadeja, Daniel Rauber, Markus Gallei, Rolf Hempelmann, Sangwon Kim, Jungtae Kim   +7 more
wiley   +1 more source

Damping of a Micro-electromechanical Resonator in the Presence of Quantum Turbulence Generated by a Quartz Tuning Fork

, 2020
A micro-electromechanical resonator, consisting of a 125×125μm2 center plate suspended 2μm above a substrate, was immersed in 4He along with a quartz tuning fork.
Barquist, C. S., Gunther, K., Lee, Y., Jiang, W. G., Chan, H. B.   +4 more
core   +1 more source

Research of quartz tuning fork tip length influence on the shear force imaging in liquids [PDF]

, 2018
In this article the use of sensors for shear force microscopy (SFM) is analysed. The sensor consists of a quartz tuning fork with an agglutined long tungsten probe tip for operation in liquid environments.
Vitas Lendraitis, Lendraitis, Vitas, Lendraitis, V.,   +2 more
core   +1 more source