Results 81 to 90 of about 934,305 (288)

Positioning and Imaging Detection of Corona Discharge in Air with Double Helix Acoustic Sensors Array

open access: yesEnergies, 2017
Corona discharge could be a serious hazard to the outdoor insulation of a high-voltage (HV) system and also is an important detection issue for insulation status diagnosis.
Ming Dong   +5 more
doaj   +1 more source

Spectral Selective and Low‐Noise Thin‐Film Organic Photodetectors Enabled by Electric‐Field Engineering

open access: yesAdvanced Materials, EarlyView.
Molecular doping redistributes the internal electric field in organic photodetectors, providing a new degree of freedom to spatially control carrier transport and collection. Simulations and experiments reveal distinct transport pathways for injected and photogenerated carriers, enabling low dark current under reverse bias and wavelength‐selective ...
Jingwei Yi   +15 more
wiley   +1 more source

Air-Coupled Low Frequency Ultrasonic Transducers and Arrays with PMN-32%PT Piezoelectric Crystals

open access: yesSensors, 2017
Air-coupled ultrasonic techniques are being increasingly used for material characterization, non-destructive evaluation of composite materials using guided waves as well as for distance measurements.
Rymantas J. Kazys   +2 more
doaj   +1 more source

Selective Laser Sintering and Graphitization for Mono‐Matrix Unibody Fabrication of Integrated Stereo‐Circuit and Stereo‐Fluidic Wearable Electronics

open access: yesAdvanced Materials, EarlyView.
A novel selective laser sintering and graphitization (SLSG) 3D printing technology enables unibody fabrication of compacted insulating structures and conductive circuits in fluidic‐integrated wearable electronics through adaptive photonic modulation.
Li Zhang, Wing Cheung Mak
wiley   +1 more source

2-D Ultrasonic Array-Based Optical Coherence Elastography. [PDF]

open access: yesIEEE Trans Ultrason Ferroelectr Freq Control, 2021
Kang H   +9 more
europepmc   +1 more source

A Cu2S/NiOOH Heterojunction Enables Highly Selective Ammonia‐to‐Nitrite Electrooxidation at Industrially Relevant Current Densities

open access: yesAdvanced Materials, EarlyView.
Cu2S/NiOOH heterojunction enables efficient ammonia electrooxidation coupled with hydrogen evolution. Interfacial electronic modulation of Ni sites promotes selective NH3‐to‐NO2− electrooxidation at high current density. In a membrane electrode assembly, Cu2S/NiOOH maintains over 90% Faradaic efficiency of nitrite at 800 mA cm−2, highlighting its ...
Ke Wang   +13 more
wiley   +1 more source

Large plate monitoring using guided ultrasonic waves [PDF]

open access: yes, 2015
Areas of stress concentration around welded structures are likely to lead to fatigue cracks and corrosion pitting during the life time of technical machinery.
Ghandourah, EII
core  

Soft and Transient Bioelectronics Enabled by Polymer‐Free Ti3C2Tx MXene Hydrogels

open access: yesAdvanced Materials, EarlyView.
We present Ti3C2Tx MXene hydrogel (MXgel) bioelectronics, a soft, flexible, and fully transient platform for high‐fidelity neural recording and stimulation. MXgel bioelectronics exhibit exceptional electrical conductivities, low electrochemical impedances, and high charge injection capacities.
Raghav Garg   +15 more
wiley   +1 more source

REAL-TIME ULTRASONIC LOCALIZATION USING AN ULTRASONIC SENSOR ARRAY

open access: yesPerner’s Contacts, 2012
This paper addresses localization using an ultrasonic receive array. The localization is realized in real-time. It is shown, that this method leads to good angle estimation accuracy in a low-cost indoor system.
Michal Mandlik   +2 more
doaj  

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