Results 71 to 80 of about 25,059 (249)

Laser photoacoustic spectroscopy applications in breathomics

Journal of Biomedical Photonics & Engineering, 2019
The breathomics approach to express-diagnosis of bronchopulmonary diseases based on spectral analysis of volatile organic compounds in a patient’s exhaled air is discussed.
Yury V. Kistenev, Alexey V. Borisov, Victor V. Nikolaev, Denis A. Vrazhnov, Dmytry A. Kuzmin   +4 more
doaj   +1 more source

Terahertz Photoacoustic Spectroscopy Using an MEMS Cantilever Sensor [PDF]

, 2014
In this paper, a microelectromechanical systems cantilever sensor was designed, modeled, and fabricated to measure the photoacoustic (PA) response of gases under very low vacuum conditions.
Coutu, Ronald A., Jr., Giauvitz, Nathan E., Medvedev, Ivan R., Petkie, Douglas T.   +3 more
core   +1 more source

Self‐Assembled (Aza)BODIPY Dyes for Biomedical in Vivo Imaging

Angewandte Chemie International Edition, EarlyView.
This minireview classifies (aza)BODIPY dyes according to their molecular stacking modes and aggregate types (H‐, oblique‐, or J‐type) in aqueous media, correlating these features with their multimodal imaging performance. By linking molecular design, exciton coupling, and pathway‐dependent assembly, we provide a framework for engineering next ...
Antonia Albers, Max Masthoff, Gustavo Fernández   +2 more
wiley   +1 more source

Folded-optics-based quartz-enhanced photoacoustic and photothermal hybrid spectroscopy

Photoacoustics
Folded-optics-based quartz-enhanced photoacoustic and photothermal hybrid spectroscopy (FO-QEPA-PTS) is reported for the first time. In FO-QEPA-PTS, the detection of the photoacoustic and photothermal hybrid signal is achieved through the use of a custom
Ruyue Cui, Hongpeng Wu, Frank K. Tittel, Vincenzo Spagnolo, Weidong Chen, Lei Dong   +5 more
doaj   +1 more source

Nonlinear photoacoustic spectroscopy of hemoglobin [PDF]

Applied Physics Letters, 2015
As light intensity increases in photoacoustic imaging, the saturation of optical absorption and the temperature dependence of the thermal expansion coefficient result in a measurable nonlinear dependence of the photoacoustic (PA) signal on the excitation pulse fluence.
Danielli, Amos, Maslov, Konstantin, Favazza, Christopher P., Xia, Jun, Wang, Lihong V.   +4 more
openaire   +3 more sources

Optimization and Characterization of Aspirin‐ and Ibuprofen‐Loaded Lipid‐Based Nanoparticle Synthesis for Antibacterial Activity and Cytotoxic Effect

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT Lipid‐based nanoparticles (LNPs) are favored for drug delivery because of their low toxicity, high biocompatibility, ability to self‐assemble into nanoparticles, and ability to enhance drug bioavailability, thereby improving drug release modulation and pharmacokinetics.
Gulizar Caliskan, Smyrna Ergonul, Zuhal Naz Cansu, Busra Kaplan   +3 more
wiley   +1 more source

Photoacoustic Techniques for Trace Gas Sensing Based on Semiconductor Laser Sources

Sensors, 2009
The paper provides an overview on the use of photoacoustic sensors based on semiconductor laser sources for the detection of trace gases. We review the results obtained using standard, differential and quartz enhanced photoacoustic techniques.
Vincenzo Spagnolo, Cinzia Di Franco, Angela Elia, Pietro Mario Lugarà   +3 more
doaj   +1 more source

Small-Size Resonant Photoacoustic Cell of Inclined Geometry for Gas Detection

, 2009
A photoacoustic cell intended for laser detection of trace gases is represented. The cell is adapted so as to enhance the gas-detection performance and, simultaneously, to reduce the cell size.
A. L. Ulasevich, A. Miklos, A. Olafsson, A. V. Gorelik, A.A. Kosterev, A.A. Kosterev, A.K.Y. Ngai, A.V. Gorelik, B.A. Paldus, D. Hofstetter, E. Huang, F. N. Nikonovich, F.G.C. Bijnen, F.J.M. Harren, F.R.E. Gruijl, J. Oomens, L.R. Narasimhan, M. P. Zakharich, M.B. Pushkarsky, M.M.J.W. Herpen van, N. S. Kazak, P. Kestler, R. Flindt, R. Lewicki, R.A. Rooth, R.F. Curl, S. Bernegger, S.L. Firebaugh, V. A. Firago, V. S. Starovoitov, V.P. Zharov, V.S. Starovoitov, V.S. Starovoitov, W. Urban, W.J. Witteman   +34 more
core   +1 more source

“Dead Lithium” Formation and Mitigation Strategies in Anode‐Free Li‐Metal Batteries

Batteries &Supercaps, Volume 8, Issue 3, March 2025.
Anode‐free lithium metal batteries, though promising due to their high energy density, face challenges from dead lithium formation. “Dead lithium”, disconnected from the anode, causes capacity loss, increased resistance, and safety risks. This review explores the origins of dead lithium, its impact on battery performance, and potential strategies for ...
Mozaffar Abdollahifar, Andrea Paolella
wiley   +1 more source

Quantitative Photoacoustic Imaging in the Acoustic Regime using SPIM

, 2017
While in standard photoacoustic imaging the propagation of sound waves is modeled by the standard wave equation, our approach is based on a generalized wave equation with variable sound speed and material density, respectively.
Beigl, Alexander, Elbau, Peter, Sadiq, Kamran, Scherzer, Otmar   +3 more
core   +1 more source