Fifty years of light scattering studies in gases, liquids and solids [abstract only]

1979 ◽  
Vol 293 (1402) ◽  
pp. 213-213
Keyword(s):  
Molecular Dynamics ◽  
Light Scattering ◽  
Raman Effect ◽  
Molecular Structures ◽  
New Developments ◽  
Laser Sources ◽  
New Applications ◽  
Structure Of Matter

Since the discovery of the Raman effect in 1928, extensive studies of light scattering in gases, liquids and solids have had a major impact on our knowledge of the structure of matter. New developments in technique and theory have continuously extended the application of light scattering to problems in physics, chemistry, and more recently in biology. The recent use of laser sources has caused a revolution in the field of light scattering, with promise of more precise measurements of molecular structures and of molecular dynamics, and important new applications and knowledge.

SCALED MODELS: SPACE-CHARGE DOMINATED ELECTRON STORAGE RINGS

2007 ◽  
Vol 22 (22) ◽  
pp. 3838-3851 ◽  
Author(s):  
R. A. KISHEK ◽  
G. BAI ◽  
S. BERNAL ◽  
D. FELDMAN ◽  
T. F. GODLOVE ◽  
...  
Keyword(s):  
Space Charge ◽  
Coherent Radiation ◽  
New Developments ◽  
Electron Storage ◽  
New Science ◽  
Slowing Down ◽  
Radiation Sources ◽  
Electron Storage Rings ◽  
Scaled Models ◽  
Structure Of Matter

New coherent radiation sources in the hard X-ray and Terahertz regimes promise exciting new developments in science, as previously dark areas of the spectrum are brightly illuminated. Ultra-short, ultra-bright radiation packets can probe the structure of matter, and image chemical and biological processes well beyond the present state of the art. Production of this coherent radiation, however, places an unprecedented challenge on the production and acceleration of high-quality electron beams. To deliver a nano-Coulomb of charge with an emittance of less than one micron, while transporting the beam through long sections of acceleration and compression, is the prerequisite for unlocking the gates of this promising new science. Using a low-energy electron storage ring, we deliberately enhance the space charge force while slowing down the time-scale to easily measurable levels so as to maximize our understanding of the particle dynamics necessary for producing bright beams.

Triple-Helix Conformation of a Polysaccharide Determined with Light Scattering, AFM, and Molecular Dynamics Simulation

2018 ◽  
Vol 51 (24) ◽  
pp. 10150-10159 ◽  
Author(s):  
Yan Meng ◽  
Xiaodan Shi ◽  
Liqin Cai ◽  
Shihai Zhang ◽  
Kan Ding ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Light Scattering ◽  
Molecular Dynamics Simulation ◽  
Triple Helix ◽  
Dynamics Simulation ◽  
Helix Conformation

scholarly journals Short Pyridine-Furan Springs Exhibit Bistable Dynamics of Duffing Oscillators

Nanomaterials ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 3264
Author(s):  
Vladik A. Avetisov ◽  
Maria A. Frolkina ◽  
Anastasia A. Markina ◽  
Alexander D. Muratov ◽  
Vladislav S. Petrovskii
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulations ◽  
Stochastic Resonance ◽  
Duffing Oscillator ◽  
Molecular Structures ◽  
Thermally Activated ◽  
Responsive Polymers ◽  
Bistable Dynamics ◽  
Dynamics Simulations ◽  
Intensive Development

The intensive development of nanodevices acting as two-state systems has motivated the search for nanoscale molecular structures whose dynamics are similar to those of bistable mechanical systems, such as Euler arches and Duffing oscillators. Of particular interest are the molecular structures capable of spontaneous vibrations and stochastic resonance. Recently, oligomeric molecules that were a few nanometers in size and exhibited the bistable dynamics of an Euler arch were identified through molecular dynamics simulations of short fragments of thermo-responsive polymers subject to force loading. In this article, we present molecular dynamics simulations of short pyridine-furan springs a few nanometers in size and demonstrated the bistable dynamics of a Duffing oscillator with thermally-activated spontaneous vibrations and stochastic resonance.

Science of High Energy, Single-Cycled Lasers

2019 ◽  
Vol 10 (01) ◽  
pp. 227-244
Author(s):  
Jonathan A. Wheeler ◽  
Gérard Mourou ◽  
Toshiki Tajima
Keyword(s):  
Laser Pulse ◽  
Laser Pulses ◽  
High Energy ◽  
New Developments ◽  
X Ray ◽  
Ion Accelerator ◽  
Laser Acceleration ◽  
High Field Science ◽  
New Applications ◽  
Wakefield Accelerator

With the advent of the Thin Film Compression, high energy single-cycled laser pulses have become an eminent path to the future of new high-field science. An existing CPA high power laser pulse such as a commercially available PW laser may be readily converted into a single-cycled laser pulse in the 10PW regime without losing much energy through the compression. We examine some of the scientific applications of this, such as laser ion accelerator called single-cycle laser acceleration (SCLA) and bow wake electron acceleration. Further, such a single-cycled laser pulse may be readily converted through relativistic compression into a single-cycled, X-ray laser pulse. We see that this is the quickest and very innovative way to ascend to the EW (exawatt) and zs (zeptosecond) science and technology. We suggest that such X-ray laser pulses have a broad and new horizon of applications. We have begun exploring the X-ray crystal (or nanostructured) wakefield accelerator and its broad and new applications into gamma rays. Here, we make a brief sketch of our survey of this vista of the new developments.

New Developments in Raman Spectroscopy with Lasers: Electronic Transitions

1968 ◽  
Vol 22 (5) ◽  
pp. 438-444 ◽  
Author(s):  
J. A. Koningstein
Keyword(s):  
Raman Spectroscopy ◽  
Single Crystals ◽  
Crystal Field ◽  
Raman Spectra ◽  
Raman Effect ◽  
Electronic Transitions ◽  
New Developments ◽  
Selection Rules ◽  
Phonon Spectra ◽  
Host Lattices

A discussion is given of the Raman spectra of single crystals of yttrium gallium garnet (YGaG), of ytterbrium gallium garnet (YbGaG), and of Yb:YGaG. From a comparison of the spectra it has been possible to separate the phonon spectra of the host lattices from that of an electronic Raman effect which occurs between the crystal field levels of the 2F7/2 manifold of Yb3+ in the garnet crystals. Information with respect to the selection rules governing both types of spectra is given.

scholarly journals Polydopamine and eumelanin molecular structures investigated with ab initio calculations

2017 ◽  
Vol 8 (2) ◽  
pp. 1631-1641 ◽  
Author(s):  
Chun-Teh Chen ◽  
Francisco J. Martin-Martinez ◽  
Gang Seob Jung ◽  
Markus J. Buehler
Keyword(s):  
Molecular Dynamics ◽  
Density Functional Theory ◽  
Dft Calculations ◽  
Ab Initio Calculations ◽  
Ab Initio ◽  
Density Functional ◽  
Md Simulations ◽  
Molecular Structures ◽  
Brute Force ◽  
Functional Theory

A set of computational methods that contains a brute-force algorithmic generation of chemical isomers, molecular dynamics (MD) simulations, and density functional theory (DFT) calculations is reported and applied to investigate nearly 3000 probable molecular structures of polydopamine (PDA) and eumelanin.

Understanding the stability of polypeptide membranes in ionic liquids: a theoretical molecular dynamics study

2019 ◽  
Vol 43 (25) ◽  
pp. 10151-10161 ◽  
Author(s):  
Eyber Domingos Alves ◽  
Leonardo Bruno Assis Oliveira ◽  
Guilherme Colherinhas
Keyword(s):  
Molecular Dynamics ◽  
Ionic Liquids ◽  
Stability Analysis ◽  
Energy Storage ◽  
Ionic Solution ◽  
The Stability ◽  
New Applications

Stability analysis of polypeptide membranes in ionic liquids can make possible new applications of these membranes in energy storage and ionic solution separation.

Sign in / Sign up

Export Citation Format

Share Document