Results 101 to 110 of about 3,994 (183)

Photoacoustic detection of stimulated emission pumping in p-difluorobenzene [PDF]

, 1984
Photoacoustic detection has been used to monitor a stimulated emission pumping process in p‐difluorobenzene. Using the Ã^(1)B_(2u)5^1 state as an intermediate, several vibrational levels of the ground electronic state were populated.
Kuppermann, A., Moll, D. J., Parker, G. R., Jr.   +2 more
core  

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

Multi-Quartz Enhanced Photoacoustic Spectroscopy with Different Acoustic Microresonator Configurations

Journal of Spectroscopy, 2015
Acoustic microresonators were added to the recently developed multi-QTF based QEPAS spectrophone to enhance the signal amplitude. Two kinds of “on-beam” configurations were experimentally investigated in detail.
Huadan Zheng, Xukun Yin, Lei Dong, Hongpeng Wu, Xiaoli Liu, Weiguang Ma, Lei Zhang, Wangbao Yin, Suotang Jia   +8 more
doaj   +1 more source

Synthesis of molybdenum oxide nanoparticles by nanosecond laser ablation [PDF]

, 2020
Phothermal therapy (PTT) is one of the most promising techniques to treat cancer. Finding the ideal PTT agent nanomaterial has remained a challenge and has brought the interest of several researchers.
Aguilar, G, Camacho-Lopez, M, Camacho-Lopez, MA, Camacho-Lopez, S, Castrejon-Sanchez, VH, Vilchis-Nestor, AR, Zamora-Romero, N   +6 more
core  

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

Acoustic Detection Module Design of a Quartz-Enhanced Photoacoustic Sensor

Sensors, 2019
This review aims to discuss the latest advancements of an acoustic detection module (ADM) based on quartz-enhanced photoacoustic spectroscopy (QEPAS). Starting from guidelines for the design of an ADM, the ADM design philosophy is described.
Tingting Wei, Hongpeng Wu, Lei Dong, Frank K. Tittel   +3 more
doaj   +1 more source

Sub-10 nm near-field localization by plasmonic metal nanoaperture arrays with ultrashort light pulses [PDF]

Near-field localization by ultrashort femtosecond light pulses has been investigated using simple geometrical nanoapertures. The apertures employ circular, rhombic, and triangular shapes to localize the distribution of surface plasmon.
Kim, C, Kim, D, Lee, H
core   +1 more source

Planar Laser-Based QEPAS Trace Gas Sensor

Sensors, 2016
A novel quartz enhanced photoacoustic spectroscopy (QEPAS) trace gas detection scheme is reported in this paper. A cylindrical lens was employed for near-infrared laser focusing.
Yufei Ma, Ying He, Cheng Chen, Xin Yu, Jingbo Zhang, Jiangbo Peng, Rui Sun, Frank K. Tittel   +7 more
doaj   +1 more source

Harmonic phase-sensitive detection for quartz-enhanced photoacoustic-thermoelastic spectroscopy

Photoacoustics
Quartz tuning fork (QTF)-based techniques of photoacoustic spectroscopy and thermoelastic spectroscopy play a significant role in trace gas sensing due to unique high sensitivity and compactness.
Mengpeng Hu, Dongqing Zhang, Hui Zhang, Yu Liu, Weibiao Wang, Qiang Wang   +5 more
doaj   +1 more source