Results 131 to 140 of about 3,766 (264)
Evanescent Field Based Photoacoustics: Optical Property Evaluation at Surfaces
, 2016 Here, we present a protocol to estimate material and surface optical properties using the photoacoustic effect combined with total internal reflection. Optical property evaluation of thin films and the surfaces of bulk materials is an important step in ...
Hunt, Heather K +5 more
core +1 more source
Deep learning‐assisted design of nanozyme for immune regulation
Journal of Intelligent Medicine, EarlyView.Overview of nanozyme‐based strategies for inflammatory bowel disease therapy, featuring metal‐based and non‐metallic nanozymes classified by structure, alongside multifunctional and engineered probiotic‐based nanozymes classified by function. Abstract Inflammatory bowel disease (IBD), with rising global incidence and disease burden, is a multifactorial
Ke Chen +3 more
wiley +1 more source
, 2020 Background: Photoacoustic (PA) imaging is an emerging non-invasive biomedical imaging modality that could potentially be used to determine the borders of basal cell carcinomas (BCC) preoperatively in order to reduce the need for repeated surgery. Methods:
Persson, Bertil, +9 more
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Prospects of photoacoustic tomography
Medical Physics, 2008 Commercially available high‐resolution three‐dimensional optical imaging modalities—including confocal microscopy, two‐photon microscopy, and optical coherence tomography—have fundamentally impacted biomedicine. Unfortunately, such tools cannot penetrate biological tissue deeper than the optical transport mean free path( in the skin).
openaire +4 more sources
In Situ Acoustic Monitoring of Focused Femtosecond Pulse Duration in Air
Laser &Photonics Reviews, EarlyView.Air‐breakdown acoustics at the laser focus is used to determine femtosecond pulse duration with a simple USB microphone. By chirp‐tuning and compressing 1030 nm pulses from 241 to 50 fs, the acoustic amplitude scales inversely proportional to the square root of the pulse duration, enabling in situ readout over 50 fs–5 ps—crucial for precise pulse ...
Indrė Meškėlaitė +9 more
wiley +1 more source
Nonlinear photoacoustics for measuring the nonlinear optical absorption coefficient
, 2010 We report a novel photoacoustic Z-scan (PAZ-scan) technique that combines the advantages offered by the conventional Z-scan method and the sensitivity of the photoacoustic detection.
Kothapalli, Sri-Rajasekhar +1 more
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Probing Red Blood Cell Morphology Using High-Frequency Photoacoustics
, 2013 A method that can rapidly quantify variations in the morphology of single red blood cells (RBCs) using light and sound is presented. When irradiated with a laser pulse, an RBC absorbs the optical energy and emits an ultrasonic pressure wave called a ...
Berndl, Elizabeth S.L. +2 more
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Peptide‐based responsive molecular fluorescent probes for precision oncology
Responsive Materials, EarlyView.Peptide‐based responsive fluorescent probes have emerged as adaptive functional materials for precision tumor theranostics, combining tumor‐selective recognition, programmable stimulus responsiveness, and modular tunability. They enable high‐contrast imaging, intraoperative guidance, real‐time monitoring, and multimodal applications, while next ...
Xing Wang +6 more
wiley +1 more source
A prelude to the multibeam photoacoustics
The report focuses on the introduction and validation of photoacoustics measurements in the presence of two simultaneous probing beams. The experiments, performed for three model systems: a perfect absorber - carbon black membrane, a multilayer system ...
Rochowski, Pawel
core
, 1986 A new technique for low-pressure photoacoustic spectroscopy, one in which a low-power radio-frequency discharge is used as a sensitive acoustic-wave sensor, is presented.
R. V. Nauman +4 more
core +1 more source