Results 51 to 60 of about 4,479,393 (285)

Investigation of a multi-element focused air-coupled transducer [PDF]

AIP Advances, 2018
This paper presents the results of a numerical simulation and experimental test of a multi-element focused air-coupled transducer. The experimental structure of each transducer element comprises 1-3 connectivity piezo-composite stacking with two matching layers to overcome the enormous impedance mismatch between the piezo-composite disc and air.
Xiaoyu Wang, Haodong Wu, Xiaodong Zhang, De Zhang, Xun Gong, Dong Zhang   +5 more
openaire   +2 more sources

DNA‐Templated 2D Heterostructures as Phototriggered Dynamic Nanohybrids: From Releasing Molecular Loads to Controlling Enzyme Biocatalytic Function

Advanced Functional Materials, EarlyView.
DNA strands are employed both as dynamic linkers and nanoscale templates for the integration of Ag2S nanoparticles on MoS2, which in turn imparted photothermal responsiveness; this feature permits the selective cargo (fluorophore, quantum dots or an enzyme) release from the MoS2 surface in response to local heat induced by light irradiation.
Kai Chen, Haosen Miao, Weiying Hong, Matteo Palma   +3 more
wiley   +1 more source

Characterisation of air coupled transducers

, 1996
his paper describes a theoretical and experimental study for determination of the through-air system impulse response and insertion loss with different air-coupled ultrasonic transducers.
Gachagan, Anthony, Hayward, Gordon, SP, Kelly, Galbraith, Walter   +3 more
core   +2 more sources

Optoelectronic Synaptic Devices Using Molecular Telluride Phase‐Change Inks for Three‐Factor Learning

Advanced Functional Materials, EarlyView.
Optoelectronic synaptic devices based on solution‐processed molecular telluride GST‐225 phase‐change inks are demonstrated for three‐factor learning. A global optical signal broadcast through a silicon waveguide induces non‐volatile conductance updates exclusively in locally electrically flagged memristors.
Kevin Portner, Dhananjeya Kumaar, Giacomo Torti, Killian Keller, Till Zellweger, Florian M. Schenk, Christoph Weilenmann, Daniel Chelladurai, Vara Prasad Jonnalagadda, Ghazi Sarwat Syed, Vanessa Wood, Jürg Leuthold, Alexandros Emboras, Maksym Yarema, Mathieu Luisier   +14 more
wiley   +1 more source

Non-contact evaluation of spot-welded nugget size based on measuring diffracted Lamb waves by focused air-coupled ultrasound

Nihon Kikai Gakkai ronbunshu, 2015
Spot-welding is widely used in various fields of industries. Since the size and quality of a welded nugget are closely related to the bonding strength of the weld, its quantitative evaluation is important to improve the reliability of the welded ...
Chenyan XU, Ikuo IHARA
doaj   +1 more source

Air-coupled PMUTs array with residual stresses: experimental tests in the linear and non-linear dynamic regime

International Journal of Smart and Nano Materials, 2020
The mechanical characterization of a 4 × 4 air-coupled array of Piezoelectric Micromachined Ultrasonic Transducers (PMUTs) is presented. The experimental campaign consists of three set of experimental tests, namely: topography measurements, small signal ...
Gianluca Massimino, Borka Lazarova, Fabio Quaglia, Alberto Corigliano   +3 more
doaj   +1 more source

On the Effects of Package on the PMUTs Performances—Multiphysics Model and Frequency Analyses

Micromachines, 2020
This paper deals with a multiphysics numerical modelling via finite element method (FEM) of an air-coupled array piezoelectric micromachined ultrasonic transducers (PMUTs).
Gianluca Massimino, Alessandro Colombo, Raffaele Ardito, Fabio Quaglia, Alberto Corigliano   +4 more
doaj   +1 more source

Fully Additive Vertical Organic Electrochemical Transistors on Renewable and Compostable Substrates Enable Ultrasensitive Bioelectronics

Advanced Functional Materials, EarlyView.
Fully additive vertical organic electrochemical transistors (vOECTs) with channel‐length of 226 nm on a 50 µm compostable substrate achieve >106 current modulation and ∼36 mS transconductance. Ion‐selective integration enables 1.1 mA dec−1 sensitivity and 36 µm detection limit, highlighting a scalable platform for sustainable electronics and ...
Giulia Frusconi, Samuele Lavelli, Zsolt M. Kovács‐Vajna, Fabrizio Torricelli   +3 more
wiley   +1 more source

Advances in air-coupled ultrasonic transducers for non-destructive testing

, 2019
Conventional ultrasonic testing involves the application of a fluid couplant for impedance matching. Increasing use of lightweight structures, composite materials and adhesive joints mostly in aerospace and automotive industry created an increasing ...
Gaal, Mate
core   +2 more sources

Advances in Sustainable and Wearable Textile Based Soft Robotics

Advanced Functional Materials, EarlyView.
This Review examines advances in wearable textile‐based soft robotics, focusing on sustainable materials, integrated sensing, and scalable actuation. It discusses manufacturing and system integration across healthcare, assistive robotics, prosthetics, and human–machine interfaces, and highlights key challenges in circular design, including life‐cycle ...
Zahir Abbas, Marzia Dulal, Sophia K. Novoselov, Victoria K. Novoselov, Kostya S. Novoselov, Shaila Afroj, Nazmul Karim   +6 more
wiley   +1 more source