Results 91 to 100 of about 3,951 (191)

Selectivity enhancement in photoacoustic gas analysis via phase-sensitive detection at high modulation frequency [PDF]

, 2010
A method for detecting a target fluid in a fluid sample comprising a first fluid and the target fluid using photoacoustic spectroscopy (PAS), comprises a) providing a light source configured to introduce an optical signal having at least one wavelength ...
Kosterev, Anatoliy
core   +1 more source

Colloidal CuFeS2 Nanocrystals: Intermediate Fe d-Band Leads to High Photothermal Conversion Efficiency [PDF]

, 2016
We describe the colloidal hot-injection synthesis of phase-pure nanocrystals (NCs) of a highly abundant mineral, chalcopyrite (CuFeS2). Absorption bands centered at around 480 and 950 nm, spanning almost the entire visible and near infrared regions ...
Almeida, G., Avellini, T., Bertoni, G., Cavalli, A., Gaspari, R., Ghosh, S., Kriegel, I., Manna, L., Pellegrino, T., Petrelli, A., Scotognella, F.   +10 more
core   +4 more sources

Recent Advances in the Synthesis, Optical Properties, and Applications of Fluorescent Silicon Carbide Quantum Dots

Small Science, Volume 5, Issue 8, August 2025.
Fluorescent silicon carbide quantum dots with excellent biocompatibility and chemical stability are gaining increasing attention. This review resolves the long‐standing debate on their emission origin, demonstrating the dominant role of surface states in radiative recombination.
Mahdi Hasanzadeh Azar, Jahanbakhsh Jahanzamin, Zimo Ji, Adrian Kitai, David Beke, Adam Gali   +5 more
wiley   +1 more source

A review of advanced acoustic‐chemical‐optical partial discharge monitoring techniques for ultra‐high‐voltage gas‐insulated equipment

High Voltage, Volume 10, Issue 4, Page 787-806, August 2025.
Abstract Partial discharge (PD) detection is considered one of the most crucial and effective methods for identifying defects in electrical equipment. Consequently, investigating advanced and efficient PD monitoring techniques is essential for the development of gas‐insulated equipment (GIE) and the construction of ultra‐high‐voltage (UHV) networks ...
Xianhao Fan, Weiqi Qin, Rui Qiu, Yiming Zang, Wu Lu, Yin Zhang, Ruiying Chen, Fangwei Liang, Guangyu Sun, Hanhua Luo, Tiejun Ma, Chuanyang Li, Jun Hu, Weidong Liu, Giovanni Mazzanti, Jinliang He   +15 more
wiley   +1 more source

Sub-ppb level HCN photoacoustic sensor employing dual-tube resonator enhanced clamp-type tuning fork and U-net neural network noise filter

Photoacoustics
Hydrogen cyanide (HCN) is a toxic industrial chemical, necessitating low-level detection capabilities for safety and environmental monitoring. This study introduces a novel approach for detecting hydrogen cyanide (HCN) using a clamp-type custom quartz ...
Lihao Wang, Haohua Lv, Yaohong Zhao, Chenglong Wang, Huijian Luo, Haoyang Lin, Jiabao Xie, Wenguo Zhu, Yongchun Zhong, Bin Liu, Jianhui Yu, Huadan Zheng   +11 more
doaj   +1 more source

Tuning NIR Absorption and Emission of Diphenyl‐Dihydrophenazine‐Based Merocyanines with Ultra Narrow Band Gap

Chemistry – A European Journal, Volume 31, Issue 42, July 25, 2025.
Novel merocyanine derivatives with a strong diphenyl‐dihydrophenazine donor and a series of strong electron acceptors were developed. The indanone and indandione acceptor units were modified by dicyanovinylene groups to tune acceptor strength. Among these derivatives, DPPZ‐IDD realized an ultranarrow electrochemical gap of 0.93 eV and an optical band ...
Kateřina Teichmanová, Stanislav Luňák Jr., Karel Pauk, Lukáš Střižík, Zdeňka Růžičková, Tomáš Mikysek, Klára Melánová, Aleš Imramovský, Kazuhiko Nagura   +8 more
wiley   +1 more source

Photoacoustics Modelling using Amplitude Mode Expansion Method in a Multiscale T-cell Resonator

, 2018
The photoacoustic (PA) effect consisting of the generation of an acoustic signal based on the absorption of light has already demonstrated its potential for various spectroscopic applications for both gaseous and solid samples. The signal produced during
Baumann, Bernd, Duggen, Lars, El-Busaidy, Said, Wolff, Marcus   +3 more
core  

Purely wavelength- and amplitude-modulated quartz-enhanced photoacoustic spectroscopy

Optics Express, 2016
We report here on a quartz-enhanced photoacoustic (QEPAS) sensor employing a quantum cascade laser (QCL) structure capable of operating in a pure amplitude or wavelength modulation configuration. The QCL structure is composed of three electrically independent sections: Gain, Phase (PS) and Master Oscillator (MO).
Patimisco, Pietro, Sampaolo, Angelo, Bidaux, Yves, Bismuto, Alfredo, Scott, Marshall, Jiang, James, Muller, Antoine, Faist, Jerome, Tittel, Frank K., SPAGNOLO, Vincenzo Luigi   +9 more
openaire   +4 more sources

Galactose‐Functionalized Gold Nanoparticles Targeting Membrane Transporters for the Glutathione Delivery to Brain Cancer Cells

ChemBioChem, Volume 26, Issue 13, July 11, 2025.
Glutathione‐functionalized gold nanoparticles are shown to reduce radicals in SH‐SY5Y and C6 cells. Conjugation of galactose to the outer shell improves internalization through the GLUT transporter, thus providing a smart multivalent system able to reduce oxidative stress in neuroblastoma and rat glioma cells.
Francesca Milano, Alessia Nito, Annalisa Caputo, Antonio Gaballo, Marco Marradi, Alessandra Quarta, Andrea Ragusa   +6 more
wiley   +1 more source

The photochemical inheritance of Eduardo Lissi and Juan Grotewold and the intersystem crossings with other inheritances

Photochemistry and Photobiology, Volume 101, Issue 4, Page 790-832, July/August 2025.
Eduardo Lissi, Dorita Adamo‐Lissi and Juan Grotewold in Aberystwyth, Wales, winter 1961. Upon their return to Buenos Aires in 1963, with their PhD degrees, Lissi and Grotewold started a Chemical Kinetics and Photochemistry group in the School of Sciences (University of Buenos Aires).
Silvia E. Braslavsky, Carlos M. Previtali   +1 more
wiley   +1 more source