Results 31 to 40 of about 13,605,822 (324)

Understanding the near-field photoacoustic spatiotemporal profile from nanostructures

open access: yesPhotoacoustics, 2022
Understanding the mechanism of photoacoustic generation at the nanoscale is key to developing more efficient photoacoustic devices and agents. Unlike the far-field photoacoustic effect that has been well employed in imaging, the near-field profile leads ...
Hanwei Wang, Yun-Sheng Chen, Yang Zhao
doaj   +1 more source

Photoacoustic effect invokes auditory response in infrared neuron stimulation [PDF]

open access: yesJournal of Innovative Optical Health Sciences, 2019
Infrared neuron stimulation is regarded as an innovative approach for stimulating cochleae in animals while the exact mechanism still remains unknown.
Muqun Yang, Tian Guan, Yonghong He
doaj   +1 more source

Numerical Modelling of the Optical–Acoustical Characterization of an Anti-Resonant Bragg Hollow Core Fiber

open access: yesPhotonics, 2023
Anti-resonant hollow core fibers (AR-HCFs) provide a promising solution for photothermal spectroscopy and photoacoustic imaging applications. Here, the AR-HCF serves as a micro platform to induce the photothermal/photoacoustic effect.
Ying Shi   +5 more
doaj   +1 more source

A Comprehensive Review on Photoacoustic-Based Devices for Biomedical Applications

open access: yesSensors, 2022
The photoacoustic effect is an emerging technology that has sparked significant interest in the research field since an acoustic wave can be produced simply by the incidence of light on a material or tissue.
Rita Clarisse Silva Barbosa   +1 more
doaj   +1 more source

Single-shot photoacoustic microscopy of hemoglobin concentration, oxygen saturation, and blood flow in sub-microseconds

open access: yesPhotoacoustics, 2020
We present fast functional optical-resolution photoacoustic microscopy (OR-PAM) that can simultaneously image hemoglobin concentration, blood flow speed, and oxygen saturation with three-pulse excitation. To instantaneously determine the blood flow speed,
Chao Liu, Yizhi Liang, Lidai Wang
doaj   +1 more source

Shock Wave Characterization Using Different Diameters of an Optoacoustic Carbon Nanotube Composite Transducer

open access: yesApplied Sciences, 2022
Carbon nanotube–polymethyl siloxane (CNT-PDMS) composite transducers generate shock waves using optoacoustic technology. A thin layer of thermally conductive CNT and elastomeric polymer, PDMS, is applied on the concave surface of transparent ...
Jooho Lee   +2 more
doaj   +1 more source

Recovery of photoacoustic images based on accurate ultrasound positioning

open access: yesVisual Computing for Industry, Biomedicine, and Art, 2021
Photoacoustic microscopy is an in vivo imaging technology based on the photoacoustic effect. It is widely used in various biomedical studies because it can provide high-resolution images while being label-free, safe, and harmless to biological tissue ...
Yinhao Pan   +5 more
doaj   +1 more source

Light Focusing and Two-Dimensional Imaging Through Scattering Media using the Photoacoustic Transmission-Matrix with an Ultrasound Array [PDF]

open access: yes, 2014
We implement the photoacoustic transmission-matrix approach on a two-dimensional photoacoustic imaging system, using a 15 MHz linear ultrasound array.
Bossy, Emmanuel   +4 more
core   +2 more sources

High‐Efficiency and Low Distortion Photoacoustic Effect in 3D Graphene Sponge [PDF]

open access: yes, 2018
The conversion of light in sound plays a crucial role in spectroscopy, applied physics, and technology. In this paper, light‐sound conversion in 3D graphene sponge through a photo‐thermoacoustic mechanism is reported.
F. Giorgianni   +9 more
semanticscholar   +1 more source

Quartz–enhanced photoacoustic spectrophones exploiting custom tuning forks: a review

open access: yesAdvances in Physics: X, 2017
A detailed review on the design and realization of spectrophones exploiting custom quartz tuning forks (QTFs) aimed to applications of quartz-enhanced photoacoustic (QEPAS) trace-gas sensors is reported.
Pietro Patimisco   +5 more
doaj   +1 more source

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