Results 21 to 30 of about 6,585 (258)

POTENTIALS OF RAMAN BASED SENSOR SYSTEM FOR AN ONLINE ANALYSIS OF HUMAN INHALE AND EXHALE [PDF]

Научно-технический вестник информационных технологий, механики и оптики, 2015
A gas sensor based on spontaneous Raman scattering is proposed for the compositional analysis of single breath events. A description of the sensor as well as of the calibration procedure, which also allows the quantification of condensable gases, is ...
T. Seeger, S. Schlüter, G. N. Lukyanov
doaj   +1 more source

Revisiting spontaneous Raman scattering for direct oxygen atom quantification [PDF]

Optics Letters, 2021
In this Letter, the counterintuitive and largely unknown Raman activity of oxygen atoms is evaluated for its capacity to determine absolute densities in gases with significant O-density. The study involves C O 2 microwave plasma to generate a self-calibrating mixture and establish accurate cross sections for
van de Steeg, A.W., Vialetto, L., Silva, A.F., Peeters, F.J. J., van den Bekerom, D.C. M., Gatti, N., Diomede, P., van de Sanden, M.C. M., van Rooij, G.J.   +8 more
openaire   +3 more sources

Analysis of Spontaneous Raman and Rayleigh Scatterings in Distributed Fiber Raman Amplification Systems Based on a Random Distribution Model

IEEE Photonics Journal, 2017
The properties of light wave propagation with stochastic scattering in a fiber are particularly attractive because of their influence in various applications.
Qiguang Feng, Wei Li, Liyan Huang
doaj   +1 more source

A SIGNAL ENHANCED PORTABLE RAMAN PROBE FOR ANESTHETIC GAS MONITORING [PDF]

Научно-технический вестник информационных технологий, механики и оптики, 2015
The spontaneous Raman scattering technique is an excellent tool for a quantitative analysis of multi-species gas mixtures. It is a noninvasive optical method for species identification and gas phase concentration measurement of all Raman active molecules,
S. Schlüter, S. Asbach, N. Popovska-Leipertz, T. Seeger, A. Leipertz   +4 more
doaj   +1 more source

Alcoholic Fermentation Monitoring and pH Prediction in Red and White Wine by Combining Spontaneous Raman Spectroscopy and Machine Learning Algorithms

Beverages, 2021
In the following study, total sugar concentrations before and during alcoholic fermentation, as well as ethanol concentrations and pH levels after fermentation, of red and white wine grapes were successfully predicted using Raman spectroscopy ...
Harrison Fuller, Chris Beaver, James Harbertson   +2 more
doaj   +1 more source

Raman Spectroscopy Techniques for the Investigation and Diagnosis of Alzheimer's Disease

Frontiers in Bioscience-Scholar, 2022
Alzheimer’s disease (AD) is the most common neurodegenerative disorder, resulting in memory loss, cognitive decline, bodily function impairment, and finally death.
Panagis Polykretis, Martina Banchelli, Cristiano D’Andrea, Marella de Angelis, Paolo Matteini   +4 more
doaj   +1 more source

High-Precision Trace Hydrogen Sensing by Multipass Raman Scattering

Sensors, 2023
Despite its growing importance in the energy generation and storage industry, the detection of hydrogen in trace concentrations remains challenging, as established optical absorption methods are ineffective in probing homonuclear diatomics.
Jaspreet Singh, Andreas Muller
doaj   +1 more source

Coherent Anti-Stokes Hyper-Raman Spectroscopy

Nature Communications
Coherent Raman scattering spectroscopies have been established as a powerful tool for investigating molecular systems with high chemical specificity. The existing coherent Raman scattering techniques detect only Raman active modes, which are a part of ...
Kazuki Inoue, Masanari Okuno
doaj   +1 more source

Cell Imaging by Spontaneous and Amplified Raman Spectroscopies

Journal of Spectroscopy, 2017
Raman spectroscopy (RS) is a powerful, noninvasive optical technique able to detect vibrational modes of chemical bonds. The high chemical specificity due to its fingerprinting character and the minimal requests for sample preparation have rendered it ...
Giulia Rusciano, Gianluigi Zito, Giuseppe Pesce, Antonio Sasso   +3 more
doaj   +1 more source

Intermediate Resistive State in Wafer‐Scale Vertical MoS2 Memristors Through Lateral Silver Filament Growth for Artificial Synapse Applications

Advanced Functional Materials, EarlyView.
In MOCVD MoS2 memristors, a current compliance‐regulated Ag filament mechanism is revealed. The filament ruptures spontaneously during volatile switching, while subsequent growth proceeds vertically through the MoS2 layers and then laterally along the van der Waals gaps during nonvolatile switching.
Yuan Fa, Milan Buttberg, Ke Ran, Rana Walied Ahmad, Dennis Braun, Lukas Völkel, Jimin Lee, Sofía Cruces, Bart Macco, Bárbara Canto, Holger Lerch, Thorsten Wahlbrink, Holger Kalisch, Michael Heuken, Andrei Vescan, Joachim Mayer, Zhenxing Wang, Ilia Valov, Stephan Menzel, Max C. Lemme   +19 more
wiley   +1 more source