Results 81 to 90 of about 6,016,080 (298)
Advanced Functional Materials, EarlyView.HfxZr1−xO2${\rm Hf}_x{\rm Zr}_{1-x}{\rm O}_2$ offers CMOS‐compatible nanoscale ferroelectricity yet suffers from a high Ec${\rm E}_c$ demanding large operating voltages. A unified phase‐field framework spanning AFE/FE/DE phases shows how FE grains soften neighboring AFE grains over λ$\lambda$ ≈$\approx$ 22–37 nm.
P. Pankaj +4 more
wiley +1 more source
A Derivative Approach to Permittivity Extraction from Free-Space S-Parameters Measurements
SensorsThe contactless characterization of dielectric materials at microwave frequencies in terms of permittivity is a long-standing need in materials science and electromagnetic engineering, and free-space techniques are attractive because they require no ...
Giancarlo Bartolucci +3 more
doaj +1 more source
Capacitive Impedance Measurement: Dual-frequency Approach
Sensors, 2019 The most widely used technique for measuring capacitive impedances (or complex electrical permittivity) is to apply a frequency signal to the sensor and measure the amplitude and phase of the output signal.
Alan Kardek Rêgo Segundo +3 more
doaj +1 more source
On-line moisture measurement of rocks, using microwave techniques [PDF]
, 1989 Includes bibliographical references.On-line measurement of the moisture content of process streams in a mineral processing plant is vital for their efficient operation.
Celliers, Scarre
core +1 more source
Advanced Functional Materials, EarlyView.A 3D‐printable breast phantom is developed using patient‐derived MRI data and hydrogels that replicate the dielectric properties of healthy and cancerous tissues. Mechanical and dielectric characterization confirm its suitability for microwave imaging.
Carlos M. Andreu +5 more
wiley +1 more source
Free space method for measurement of complex permittivity
, 2012 The aim of this thesis is the development of the workplace for the complex permittivity measurement by free space method. At the beginning of this thesis, the method is described. Further attention is focused on the discussions concerning electromagnetic
Nekovář, Jiří
core +1 more source
A FDR Sensor for Measuring Complex Soil Dielectric Permittivity in the 10–500 MHz Frequency Range
Sensors, 2010 Mechanical details as well as electrical models of FDR (frequency domain reflectometry) sensors for the measurement of the complex dielectric permittivity of porous materials are presented.
Wojciech Skierucha, Andrzej Wilczek
doaj +1 more source
Opportunities of Semiconducting Oxide Nanostructures as Advanced Luminescent Materials in Photonics
Advanced Materials, EarlyView.The review discusses the challenges of wide and ultrawide bandgap semiconducting oxides as a suitable material platform for photonics. They offer great versatility in terms of tuning microstructure, native defects, doping, anisotropy, and micro‐ and nano‐structuring. The review focuses on their light emission, light‐confinement in optical cavities, and
Ana Cremades +7 more
wiley +1 more source
Dielectric permittivity extraction of MoS2 nanoribbons using THz nanoscopy
NanophotonicsThe nanoscale optical properties of high-quality MoS2 nanoribbons are investigated using THz nanoscopy based on a scattering-type scanning probe. The nanoribbons comprise a multilayer core, surrounded by monolayer edges.
Lassen Henrik B. +6 more
doaj +1 more source
Measurement of complex permittivity and complex permeability by transmission: reflection method in waveguide / Surani Sujor [PDF]
, 2000 This microwave measurement of complex permittivity (ε*) and complex permeability (µ*) method involve measurement of Forward Transmission coefficient and Forward Reflection coefficients that result when a sample of dielectric material is inserted in a ...
Sujor, Surani
core