Results 171 to 180 of about 15,655 (316)

Optofluidic Raman Analysis and Capacity Recovery in Li‐ion Cells

Advanced Materials Technologies, EarlyView.
Operando Raman spectroscopy is used to monitor the degradation of commercial Li‐ion cells. Using a microfluidic access port, small amounts of electrolyte are sampled into a hollow‐core optical fibre, where fibre‐enhanced Raman analysis reveals Li+ solvation changes and solvent evolution.
Ermanno Miele, Wesley M. Dose, Ian A. K. Davidson, Hesham Sakr, Natalie V. Wheeler, Francesco Poletti, Michael De Volder, Clare P. Grey, Jeremy J. Baumberg, Tijmen G. Euser   +9 more
wiley   +1 more source

Imaging spectroscopy reveals spike-like repeating radio burst pairs in the solar corona. [PDF]

Nat Commun
Ma S, Kontar EP, Clarkson DL, Chen H, Yan Y.   +4 more
europepmc   +1 more source

Analysis of radio wave propagation for ISM 2.4 GHz Wireless Sensor Networks in inhomogeneous vegetation environments. [PDF]

Sensors (Basel), 2014
Azpilicueta L, López-Iturri P, Aguirre E, Mateo I, Astrain JJ, Villadangos J, Falcone F.   +6 more
europepmc   +1 more source

Highly Anisotropic Quasi‐Direct Organic Metal Halide Hybrids: A Platform for Polarization‐Sensitive Optoelectronics

Advanced Materials Technologies, EarlyView.
One‐dimensional C4N2H14PbBr4 is shown to have a quasi‐direct electronic band structure and strongly anisotropic transport with polarized broadband emission. A GW/Bethe–Salpeter excited‐state force formalism, supported by polarized Raman and temperature‐dependent photoluminescence, identifies low–frequency Pb–Br phonons that drive ultrafast exciton self‐
Rijan Karkee, Rafael R. Del Grande, Yeonjoo Lee, Jinkyoung Yoo, Azza Ben‐Akacha, Biwu Ma, Michael T. Pettes, David A. Strubbe   +7 more
wiley   +1 more source

Research on Radio Altimetry in Urban Environments Based on Electromagnetic Simulation Echo Modeling Technology. [PDF]

Sensors (Basel)
Xiong J, Xie X, Guan X, Xu Y, Li C.
europepmc   +1 more source

Tunable Extraordinary Optical Transmission in the Long‐Wavelength Infrared Range Using Electrostatic MEMS Actuation

Advanced Materials Technologies, EarlyView.
A MEMS‐integrated metamaterial filter enables continuous, low‐voltage spectral tuning in the long‐wavelength infrared (LWIR). The device employs extraordinary optical transmission in a dual suspended metasurface stack, where electrostatic actuation precisely controls the intermembrane air gap.
Oleg Bannik, Fedor Kovalev, Michal Zawierta, Dilusha Silva, Lorenzo Faraone, Ilya Shadrivov, Mariusz Martyniuk   +6 more
wiley   +1 more source

Modelling the impact of energetic electrons on electron-acoustic instabilities and HF/UHF wave propagation in the ionospheric-like plasmas. [PDF]

Sci Rep
Ebadi D, Barzegar S.
europepmc   +1 more source

Vegetation attenuation measurements and modeling in plantations for wireless sensor network planning [PDF]

, 2012
Mohammad, E., Ahmad, R., Jafaar, M., Shakaff, A., Kamarudin, L., Ndzi, David, Zakaria, A., Fareq, M.   +7 more
core   +1 more source

Terrestrial radio wave propagation at millimeter-wave frequencies

, 2000
This research focuses on radio wave propagation at millimeter-wave frequencies. A measurement based channel characterization approach is taken in the investigation. First, measurement techniques are analyzed.
Xu, Hao
core  

Microstructured Electrode‐Piezopolymer Interface for Ultrasound Transducers With Enhanced Flexibility and Acoustic Performance

Advanced Materials Technologies, EarlyView.
Flexible piezopolymer ultrasound transducers are engineered by tailoring the electrode–piezopolymer interface using metallic, flake‐based, and porous graphene electrodes. Laser‐induced graphene's porous structure enables polymer infiltration, strengthening interfacial coupling and enhancing piezoelectric response and acoustic output.
Spencer Hagen, Dulcce A. Valenzuela, Parag V. Chitnis, Shirin Movaghgharnezhad   +3 more
wiley   +1 more source