Results 151 to 160 of about 409,083 (217)
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Picosecond ultrasonics for cell imaging and characterisation
Photons Plus Ultrasound: Imaging and Sensing 2022, 2022Characterisation of the elasticity of biological cells is growing as a way to study cell biology. Cell mechanics are related to cell behaviour and potential applications offer great opportunities. Current methods to study cell mechanics are often limited
F. Pérez-Cota +6 more
semanticscholar +2 more sources
Probing single-cell mechanics with picosecond ultrasonics.
Ultrasonics, 2015The mechanical properties of cells play a key role in several fundamental biological processes, such as migration, proliferation, differentiation and tissue morphogenesis. The complexity of the inner cell composition and the intricate meshwork formed by transmembrane cell-substrate interactions demands a non-invasive technique to probe cell mechanics ...
T. Dehoux +8 more
semanticscholar +4 more sources
In situ monitoring of electromigration in a single nano wire by picosecond ultrasonics
Journal of the Acoustical Society of America, 2023Recent nano-scale fabrication has realized the progress of integrated circuits, where current density increases with the downscaling of each electronic component, leading to failure due to electromigration.
A. Nagakubo, Eriko Asanuma, H. Ogi
semanticscholar +1 more source
Simulation of multiwavelength conditions in laser picosecond ultrasonics
International Conference on Advances in System Simulation, 2021Complete numerical simulations are given under SciLab® and MATLAB® coding environments, concerning propagative acoustic wavefronts, for laser picosecond ultrasonics under multiwavelength conditions.
P. Babilotte
semanticscholar +1 more source
Interferometric detection in picosecond ultrasonics
Physica B: Condensed Matter, 1999Abstract We report results obtained using an optical interferometric detection in picosecond ultrasonics. A comparison between signals detected by reflectometric and interferometric measurements was done in various systems: thin films, multilayers and particles in colloids.
B Perrin +3 more
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Parallel detection for picosecond ultrasonics
The Journal of the Acoustical Society of America, 2008Picosecond laser ultrasonics is a powerful technique for measurement and diagnosis of micro- and nano-scale structures. Unfortunately the data acquisition speeds are slow, this is a major drawback for widespread acceptance and usually makes imaging impractical.
Richard Smith +5 more
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Picosecond ultrasonics in gold nanoparticles
The Journal of the Acoustical Society of America, 1999Pump–probe optical techniques with femtosecond laser sources can be used to provide information about the acoustical properties of very thin films. With this so-called ‘‘picosecond ultrasonics technique,’’ echoes shorter than 10 ps can be time-resolved in films whose thicknesses are larger than a few tens of nm; for smaller thicknesses, the acoustic ...
Arnaud Devos +2 more
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Picosecond ultrasonic measurements using an optical mask
Ultrasonics, 2015In this paper we describe results obtained using a variation of the picosecond ultrasonics technique. We place a transparent optical mask very close to the surface of the sample. The lower surface of the mask has a series of grooves to produce a variation of the intensity of the pump and probe light pulses across the surface of the sample.
Q, Miao +4 more
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Picosecond Ultrasonics in Magnetic Topological Insulator MnBi2Te4.
Nano letters (Print)MnBi2Te4 is a magnetic topological insulator with layered A-type antiferromagnetic order. It exhibits a rich layer- and magnetic-state dependent topological phase diagram; however, much about the coupling between spin, charge, and lattice remains to be ...
Jordan Fonseca +5 more
semanticscholar +1 more source
Mechanical contacts probed with picosecond ultrasonics
The Journal of the Acoustical Society of America, 2008We investigate the contact between a thin metal film and a ball bearing indented to nanometre depths using picosecond ultrasonics. The area of contact is acoustically imaged to micron spatial resolution using GHz acoustic pulses produced by ultrashort pulsed optical excitation of the film through a transparent substrate.
Thomas Dehoux +2 more
openaire +1 more source