Results 51 to 60 of about 24,948 (254)

Solving of the inverse diffraction problem in the first Rytov approximation for retrieving the phase object dielectric permittivity

Компьютерная оптика
In the study we derive a solution of the inverse diffraction problem aimed at retrieving the dielectric permittivity of a phase object by using the changes in the intensity and phase shift of coherent laser radiation probing the object.
E.V. Parkevich, A.I. Khirianova, T.F. Khirianov   +2 more
doaj   +1 more source

Comparaison des modèles numériques tridimensionnels de diffraction-radiation Comparison of Three-Dimentional Numerical Diffraction-Radiation Models

Oil & Gas Science and Technology, 2006
Le but de cet article est de présenter le bilan des études effectuées jusqu'à présent sur le problème de la diffraction-radiation. II fait suite au séminaire qui a eu lieu sur ce sujet en avril 1977 à Paris et qui a réuni les principaux chercheurs ...
Susbielles G., Berhault C.
doaj   +1 more source

Bismuth‐Based Photocatalysts for Water Remediation: Design Strategies, Mechanisms, and Challenges

Advanced Functional Materials, EarlyView.
This review highlights representative design strategies for bismuth‐based semiconductor photocatalysts in solar‐driven water purification. Emphasis is placed on electronic structure regulation, oxygen‐vacancy engineering, and interfacial coupling to enable efficient full‐spectrum light utilization, improved charge separation, and selective oxidation in
Shan Liu, Yi Zhao, Liming Cai, Simin Long, Jing Kang, Jingkai Lin, Jimin Shen, Zhonglin Chen, Shaobin Wang, Huayang Zhang   +9 more
wiley   +1 more source

Operando Tracking of Oxygen‐Vacancy Dynamics and Negative Capacitance in Ca‐Doped BiFeO3

Advanced Functional Materials, EarlyView.
Operando electrochemical impedance spectroscopy, combined with electrocoloration, enables a direct correlation between real‐space ionic redistribution and the corresponding frequency‐domain electrical response. In lateral Ca‐doped BiFeO3 devices, time‐resolved impedance snapshots capture the evolution from bulk‐dominated mixed conduction to an ...
Jeonghun Suh, Heung‐Sik Park, Jong‐Sook Lee, Chan‐Ho Yang   +3 more
wiley   +1 more source

Method to enhance the resolution of x-ray coherent diffraction imaging for non-crystalline bio-samples

New Journal of Physics, 2014
To circumvent the problem of radiation damage when using an x-ray coherent diffraction imaging experiment to resolve the structure of biological samples, we propose a method to add objects made of heavy atoms with the bio-samples or we load the samples ...
Ti-Yen Lan, Po-Nan Li, Ting-Kuo Lee
doaj   +1 more source

Protein crystal structure from non-oriented, single-axis sparse X-ray data

IUCrJ, 2016
X-ray free-electron lasers (XFELs) have inspired the development of serial femtosecond crystallography (SFX) as a method to solve the structure of proteins.
Jennifer L. Wierman, Ti-Yen Lan, Mark W. Tate, Hugh T. Philipp, Veit Elser, Sol M. Gruner   +5 more
doaj   +1 more source

Solving the spectral gap problem with a four-mirror bow-tie cavity in waveguide free-electron laser oscillators

Scientific Reports, 2023
The generation of intense coherent radiation pulses in the far-infrared and terahertz regimes is of considerable interest to the free-electron laser (FEL) radiation user community.
Mengqi Xia, Yuanfang Xu, Zhouyu Zhao, Heting Li   +3 more
doaj   +1 more source

Molecular Rotors: From Newtonian Fluids to Functional Materials as Viscosity and Temperature Sensing Tools

Advanced Functional Materials, EarlyView.
Molecular rotors are fluorescent molecules that are sensitive to viscosity and temperature variations in the environment. They exhibit a direct correlation between fluorescence and viscosity within Newtonian fluids. However, this correlation becomes less straightforward in complex systems.
Flavia Di Scala, Alice Briole, Valerii Myndrul, Thomas J. Cleij, Hanne Diliën, Bérengère Abou, Bart van Grinsven   +6 more
wiley   +1 more source

Solving the complete pseudo-impulsive radiation and diffraction problem using a spectral element method [PDF]

Computer Methods in Applied Mechanics and Engineering
21 pages, 11 ...
Jens Visbech, Allan P. Engsig-Karup, Harry B. Bingham   +2 more
openaire   +3 more sources

Mineral Deposition From Liquid Precursors Triggered by Complementary Polyelectrolytes

Advanced Functional Materials, EarlyView.
Polyelectrolyte additives can delay or prevent crystal nucleation in supersaturated solutions of insoluble mineral salts such as calcium carbonate. This work reports that adding a second, oppositely‐charged polyelectrolyte leads to immediate mineral crystallization from such metastable solutions.
Mohammed Kayes Patoary, Eli Halperin Pierce, Elizabeth Siu, Brigitte Gallagher, Md Abul Shahid, Yang Zhang, Thomas B. H. Schroeder   +6 more
wiley   +1 more source