Results 81 to 90 of about 99,819 (303)

Microneedles with Interdigitated Electrodes for In Situ Impedimetric VEGF Sensing

open access: yesAdvanced Materials Interfaces
Continuous monitoring of protein biomarkers in interstitial fluid (ISF) is essential for improving patient care and outcomes. This study presents a novel electrochemical impedance spectroscopy (EIS) sensor utilizing microneedles (MNs) patterned with ...
Ritu Das   +10 more
doaj   +1 more source

Advances in Capacitive Micromachined Ultrasonic Transducers

open access: yesMicromachines, 2019
Capacitive micromachined ultrasonic transducer (CMUT) technology has enjoyed rapid development in the last decade. Advancements both in fabrication and integration, coupled with improved modelling, has enabled CMUTs to make their way into mainstream ...
Kevin Brenner   +5 more
doaj   +1 more source

Atom Probe Tomography as an Emerging Tool for Understanding Defect‑Driven Mechanisms in HfO2‑Based Ferroelectrics

open access: yesAdvanced Functional Materials, EarlyView.
This Perspective highlights atom probe tomography as a powerful tool for understanding the atomic‐scale defect chemistry in HfO2‐based ferroelectrics. 3D mapping of dopants, point defects, and interface chemistry can provide new insight into defect‐driven mechanisms underpinning the ferroelectricity in the system and guide the design of more reliable ...
Kasper Hunnestad   +3 more
wiley   +1 more source

Piezo-Potential Generation in Capacitive Flexible Sensors Based on GaN Horizontal Wires

open access: yesNanomaterials, 2018
We report an example of the realization of a flexible capacitive piezoelectric sensor based on the assembly of horizontal c¯-polar long Gallium nitride (GaN) wires grown by metal organic vapour phase epitaxy (MOVPE) with the Boostream® technique
Amine El Kacimi   +3 more
doaj   +1 more source

Laboratory Evaluation of Railroad Crosslevel Tilt Sensing Using Electrical Time Domain Reflectometry

open access: yesSensors, 2020
Crosslevel is defined as the difference in elevation between the top surface of two railroad tracks. Severe changes in crosslevel, for example, due to earthquakes, ground settlement, or crushed ballasts, affect track geometry and can cause train ...
Sijia Li, Chi-Lin Chen, Kenneth J. Loh
doaj   +1 more source

Continuous online monitoring of partial discharges in high voltage cables

open access: yes, 2004
This paper reviews data acquisition, transmission and processing methodologies for continuous online monitoring of partial discharges in power cable systems.
Tian, Y.   +4 more
core   +1 more source

Noise‐Limited Bit Precision in Ferroelectric Synaptic Transistors for High‐Resolution Neuromorphic Computing

open access: yesAdvanced Functional Materials, EarlyView.
Low‐frequency noise spectroscopy defines the resolvable conductance states of synaptic FeFETs by coupling read‐current fluctuation with usable dynamic range. The resulting noise‐limited bit precision establishes a universal, device‐agnostic reliability metric beyond the memory window, enabling quantitative benchmarking and rational design of high ...
Jaehong Park   +12 more
wiley   +1 more source

Capacitive compensation at nonsinsoidal buses based on IEEE Std. 18-1992 [PDF]

open access: yes, 2003
This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of Brunel University's products or services. Internal or personal use of this material is permitted.
Zobaa, AF
core   +1 more source

An Edible Chitosan‐Based Acoustic Sensor for Sound‐Responsive Actuation in Edible Robots

open access: yesAdvanced Functional Materials, EarlyView.
This study introduces an edible acoustic sensor for robotic food and edible robotics. Built from a chitosan piezoelectric film between gold electrodes, the sensor enables acoustic communication through ON/OFF keying. Integrated into an edible robot with pneumatically actuated arms and neck, it responds to high‐frequency tones.
Valerio Francesco Annese   +8 more
wiley   +1 more source

A Review of MEMS Capacitive Microphones

open access: yes, 2020
This review collates around 100 papers that developed micro-electro-mechanical system (MEMS) capacitive microphones. As far as we know, this is the first comprehensive archive from academia on this versatile device from 1989 to 2019.
Faisal Mohd-Yasin   +7 more
core   +1 more source

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