Results 61 to 70 of about 4,208,561 (328)

Analysing the significance of small conformational changes and low occupancy states in serial crystallographic data

FEBS Open Bio, EarlyView.
This protocol paper outlines methods to establish the success of a time‐resolved serial crystallographic experiment, by means of statistical analysis of timepoint data in reciprocal space and models in real space. We show how to amplify the signal from excited states to visualise structural changes in successful experiments.
Jake Hill, Yelyzaveta Pulnova, Elke De Zitter, Helen M. Ginn, Briony A. Yorke   +4 more
wiley   +1 more source

An absorption spectrum amplifier for determining gas composition [PDF]

, 1972
Compositions of gas samples are frequently studied by laser absorption spectroscopy. Sensitivity is improved by two orders of magnitude when absorption cell is placed inside an organic-dye laser ...
Bass, A. M., Brown, W., Keller, R. A., Kurylo, M. J., Peterson, N. C., Zalewski, E. F.   +5 more
core   +1 more source

Strong extinction of a far-field laser beam by a single quantum dot [PDF]

, 2007
Through the utilization of index-matched GaAs immersion lens techniques we demonstrate a record extinction (12%) of a far-field focused laser by a single InAs/GaAs quantum dot.
Abouraddy A. F., Alén B., Atatüre M., Berezovsky J., Citron M. L., DiVincenzo D. P., Geradot B. D., Gerhardt I., Goldberg B. B., Högele A., Imamoǧlu A., Ippolito S., Ippolito S., Karrai K., Liu Z., Mandel L., Mansfield S. M., Novotny L., Quabis S., van Enk S., van Enk S. J., Warburton R. J., Zwiller V.   +22 more
core   +1 more source

Enhancing Corrosion Resistance and Mechanical Strength of 3D‐Printed Iron Polylactic Acid for Marine Applications via Laser Surface Texturing

Advanced Engineering Materials, EarlyView.
Laser surface texturing significantly improves the corrosion resistance and mechanical strength of 3D‐printed iron polylactic acid (Ir‐PLA) for marine applications. Optimal laser parameters reduce corrosion by 80% and enhance tensile strength by 25% and ductility by 15%.
Mohammad Rezayat, Mojtaba Karamimoghadam, Mohammadreza Lalegani Dezaki, Ali Zolfagharian, Giuseppe Casalino, Antonio Mateo, Mahdi Bodaghi   +6 more
wiley   +1 more source

Polymer-Dispersed Liquid Crystal Gas Sensor for Acetone Detection Using Correlated Laser Speckles

Photonic Sensors
Acetone is a widely used volatile organic compound in various industries, and several gas sensors have been developed for its detection and real-time monitoring.
Xiaoquan Bai, Ning Bu, Yuxiang Yan, Yifei Ma, Mei Wang, Suotang Jia, Xuyuan Chen, Zhaomin Tong   +7 more
doaj   +1 more source

Beat frequency quartz-enhanced photoacoustic spectroscopy for fast and calibration-free continuous trace-gas monitoring

Nature Communications, 2017
Quartz-enhanced photoacoustic spectroscopy is a sensitive gas detection method whereby radiation-induced sound waves from gas absorption are detected. Here, Wuet al. use the beat frequency between a modulated laser and a tuning fork resonance to increase
Hongpeng Wu, Lei Dong, Huadan Zheng, Yajun Yu, Weiguang Ma, Lei Zhang, Wangbao Yin, Liantuan Xiao, Suotang Jia, Frank K. Tittel   +9 more
doaj   +1 more source

Fiber-Amplifier-Enhanced QEPAS Sensor for Simultaneous Trace Gas Detection of NH3 and H2S

Sensors, 2015
A selective and sensitive quartz enhanced photoacoustic spectroscopy (QEPAS) sensor, employing an erbium-doped fiber amplifier (EDFA), and a distributed feedback (DFB) laser operating at 1582 nm was demonstrated for simultaneous detection of ammonia (NH3)
Hongpeng Wu, Lei Dong, Xiaoli Liu, Huadan Zheng, Xukun Yin, Weiguang Ma, Lei Zhang, Wangbao Yin, Suotang Jia   +8 more
doaj   +1 more source

The Geometry of Nanoparticle-on-Mirror Plasmonic Nanocavities Impacts Surface-Enhanced Raman Scattering Backgrounds

Nanomaterials, 2023
Surface-enhanced Raman scattering (SERS) has garnered substantial attention due to its ability to achieve single-molecule sensitivity by utilizing metallic nanostructures to amplify the exceedingly weak Raman scattering process. However, the introduction
Zixin Wang, Wenjin Zhou, Min Yang, Yong Yang, Jianyong Hu, Chengbing Qin, Guofeng Zhang, Shaoding Liu, Ruiyun Chen, Liantuan Xiao   +9 more
doaj   +1 more source

Femtosecond Laser-induced Crystallization of Amorphous Sb2Te3 film and Coherent Phonon Spectroscopy Characterization and Optical Injection of Electron Spins

, 2011
A femtosecond laser-irradiated crystallizing technique is tried to convert amorphous Sb2Te3 film into crystalline film. Sensitive coherent phonon spectroscopy (CPS) is used to monitor the crystallization of amorphous Sb2Te3 film at the original ...
Chen, Ke, Gan, Fuxi, Huang, Huan, Lai, Tianshu, Li, Simian, Wang, Wenfang, Wang, Yang, Wu, Yiqun, Yao, Dao-Xin, Zhu, Weiling   +9 more
core   +1 more source

Standoff Chemical Detection Using Laser Absorption Spectroscopy: A Review

Remote Sensing, 2020
Remote chemical detection in the atmosphere or some specific space has always been of great interest in many applications for environmental protection and safety.
Jinyi Li, Ziwei Yu, Z. Du, Yue Ji, Chang Liu   +4 more
semanticscholar   +1 more source