Results 81 to 90 of about 21,982 (208)

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, Hsin‐Hui Huang, Haoran Mu, Nguyen Hoai An Le, Tomas Katkus, Edvinas Aleksandravičius, Gabrielius Kontenis, Domas Paipulas, Saulius Juodkazis, Darius Gailevičius   +9 more
wiley   +1 more source

2D van der Waals System Integrated with Targeting Radio‐Diagnostic and Imaging Functions

Small, EarlyView.
Layered double hydroxide (LDH) nanoplates were engineered for tumor‐targeted imaging and therapy. By exploiting folate receptor (FR) expression levels, the system achieves selective tumor accumulation and high‐resolution dual PET/fluorescence (PET/FL) imaging.
Sairan Eom, Jae Hun Ahn, Jung Yung Kim, Kyo Chul Lee, Yong Jin Lee, Sanoj Rejinold N, Jin‐Ho Choy   +6 more
wiley   +1 more source

Photoacoustic spectroscopy as a method in biological investigations

Archives of Acoustics, 2015
The present paper describes a new method of photoacoustic spectroscopy for the investigation of the properties of materials. This method is applied in studies of both inorganic and organic materials, including biological structures. The paper also gives
Jerzy MOTYLEWSKI, Jerzy RANACHOWSKI
doaj  

In Situ Oil–Gas Separator Enabled Carrier-Free Photoacoustic Sensing of Acetylene

Sensors
In this work, a carrier-free photoacoustic spectroscopy system is developed for the detection of trace acetylene gas in insulating oil. The photoacoustic cell was integrated with an oil–gas separator, allowing dissolved gases in oil to be introduced into
Weitao Dou, Xitong Sun, Yanping Gao, Shudong Wang, Kai Tao, Yunjia Li   +5 more
doaj   +1 more source

Studies on lasers and laser devices [PDF]

The goal of this grant was to study lasers, laser devices, and uses of lasers for investigating physical phenomena are studied. The active projects included the development of a tunable, narrowband XUV light source and its application to the spectroscopy
Harris, S. E., Siegman, A. E., Young, J. F.   +2 more
core   +1 more source

Application of a nudging technique to thermoacoustic tomography [PDF]

, 2010
ThermoAcoustic Tomography (TAT) is a promising, non invasive, medical imaging technique whose inverse problem can be formulated as an initial condition reconstruction.
Bonnefond, Xavier, Marinesque, Sébastien   +1 more
core   +2 more sources

External Stimuli‐Activable Single‐Atom Nanozymes for Bioapplications

Small, EarlyView.
Stimuli‐activable single‐atom nanozymes (SANs) are reviewed from materials design to biomedical applications. We explain electronic‐structure tuning principles and synthesis strategies that maximize the responsiveness of metal active sites and supports to light, ultrasound, and magnetic fields.
Hyun Ko, Jungsue Choi, Hyeonjeong Noh, Sohyeon Seo, Heedong Kwon, Seungjune Lee, Hyoyoung Lee   +6 more
wiley   +1 more source

Cavity-enhanced photoacoustic dual-comb spectroscopy

Light: Science & Applications
Photoacoustic dual-comb spectroscopy (DCS), converting spectral information in the optical frequency domain to the audio frequency domain via multi-heterodyne beating, enables background-free spectral measurements with high resolution and broad bandwidth.
Zhen Wang, Qinxue Nie, Haojia Sun, Qiang Wang, Simone Borri, Paolo De Natale, Wei Ren   +6 more
doaj   +1 more source

Differential photoacoustic-stimulated Raman spectroscopy (DPA-SRS) for high-sensitivity hydrogen detection

Photoacoustics
To detect non-polar, infrared-inactive hydrogen, a Differential Photoacoustic-Stimulated Raman Spectroscopy (DPA-SRS) method is proposed. Utilizing the SRS process, a portion of the pump light is converted into intense Stokes light corresponding to the ...
Xin Yu, Zhengang Li, Jiaxiang Liu, Haichun Xu, Junfang Miao, Canlong Wang, Yongqing Fang, Ying Pan, Yonghua Fang   +8 more
doaj   +1 more source

Carbon monoxide‐triggered near‐infrared photoacoustic‐fluorescent integrated visualization tool for auxiliary diagnosis of heart failure and evaluation of reversal drug efficacy

Smart Molecules, EarlyView.
An activatable metal‐free probe CS‐CO enables the first non‐invasive photoacoustic/fluorescence visualization of carbon monoxide (CO) fluctuations during heart failure and its reversal, linking CO levels directly to disease status. Abstract Heart failure (HF), a major global health challenge with high morbidity and mortality, lacks effective biomarkers
Hongze He, Jingrui Yang, Yu Wu, Ping Lin, Tianxiao Lai, Junjie Jia, Jiangfeng Li, Weiying Lin   +7 more
wiley   +1 more source