Results 31 to 40 of about 61,907 (317)
A Low-Cost Optoacoustic Sensor for Environmental Monitoring
Sensors, 2021 Attention to Black Carbon (BC) has been rising due to its effects on human health as well its contribution to climate change. Measurements of BC are challenging, as currently used devices are either expensive or impractical for continuous monitoring ...
Antonios Stylogiannis +4 more
doaj +1 more source
Nonlinear mechanisms in photoacoustics—Powerful tools in photoacoustic imaging
Photoacoustics, 2021 Many nonlinear effects have been discovered and developed in photoacoustic imaging. These nonlinear mechanisms have been explored for different utilizations, such as enhancing imaging contrast, measuring tissue temperature, achieving super-resolution imaging, enabling functional imaging, and extracting important physical parameters. This review aims to
Rongkang Gao +4 more
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Fiber endface photoacoustic generator for quantitative photoacoustic tomography
Optics Letters, 2021 We demonstrate a novel fiber endface photoacoustic (PA) generator using infrared (IR) 144 laser dye dispersed within an ultraviolet adhesive. The generator provides a wide acoustic bandwidth in the transducer frequency range of 2–7 MHz, high thermal conversion efficiency ( > 90 % ), good PA signal controllability (well ...
Guang Yang +6 more
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Quantitative analysis of a closed photoacoustic cell that uses a high compliance piezoelectric transducer [PDF]
, 2005 A treatment of the operation of low-frequency closed photoacoustic cells is presented, which considers the compliance of various cell elements. The optimum detector, according to our predictions, has a sensor whose compliance is large compared to that
Johnson, Mark +5 more
core +1 more source
Correlation of trans-Lycopene Measurements by the HPLC Method with the Optothermal and Photoacoustic Signals and the Color Readings of Fresh Tomato Homogenates [PDF]
, 2009 The trans-lycopene content of fresh tomato homogenates was assessed by means of the laser photoacoustic spectroscopy, the laser optothermal window, micro-Raman spectroscopy, and colorimetry; none of these methods require the extraction from the product ...
Ksenija Marković +23 more
core +1 more source
Neurovascular photoacoustic tomography [PDF]
Frontiers in Neuroenergetics, 2010 Neurovascular coupling refers to the relationship between neuronal activities and downstream hemodynamic responses. Photoacoustic tomography (PAT), enabling comprehensive label-free imaging of hemodynamic activities with highly scalable penetration and spatial resolution, has great potential in the study of neurovascular coupling.
Hu, Song, Wang, Lihong V.
openaire +3 more sources
Applied Sciences, 2020 This paper presents a photoacoustic non-destructive evaluation (pNDE) system with an ultrahigh resolution for the detection of multi-scale damage in carbon fiber-reinforced plastic (CFRP) composites.
Siqi Wang +5 more
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Photoacoustics, 2018 In a carrier flow based permeation system the measured permeation curve is the convolution of two processes: the intrinsic permeation process and the transfer of the permeated molecules through the measuring system.
Zoltán Bozóki +4 more
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Optical and Photoacoustic Properties of Laser-Ablated Silver Nanoparticles in a Carbon Dots Solution
Molecules, 2020 This study used the carbon dots solution for the laser ablation technique to fabricate silver nanoparticles. The ablation time range was from 5 min to 20 min.
Amir Reza Sadrolhosseini +4 more
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Photoacoustic Imaging to Track Magnetic-manipulated Micro-Robots in Deep Tissue
Sensors, 2020 The next generation of intelligent robotic systems has been envisioned as micro-scale mobile and externally controllable robots. Visualization of such small size microrobots to track their motion in nontransparent medium such as human tissue remains a ...
Yan Yan +2 more
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