Results 21 to 30 of about 220,714 (262)

OPTICAL PROPERTIES OF AMORPHOUS THIN FILMS OF SODIUM-TUNGSTEN OXIDE BRONZES

open access: yesФизико-химические аспекты изучения кластеров, наноструктур и наноматериалов, 2021
The spectral dependences were measured of the optical density of amorphous thin films of sodium-tungsten oxide bronze of the tetragonal structure and the composition Na0,3WO3, condensed on glass substrates, thermostated at temperatures of 373, 473 and ...
B.M. Khubolov
doaj   +1 more source

Gold Nanoparticles Formation Mechanism by Photochemical Synthesis

open access: yesChemical Engineering Transactions, 2018
In this research, the effect of tetrachloroauric acid concentration, irradiation time and silver nitrate concentration on the morphology and radiation absorption of gold nanoparticles obtained by photochemical synthesis was determined. Absorption spectra
J.A. Sanabria-Cala   +6 more
doaj   +1 more source

Graphene-based metasurface solar absorber design with absorption prediction using machine learning

open access: yesScientific Reports, 2022
Solar absorber is required to absorb most of the energy of the solar spectral irradiance. We propose a graphene-based solar absorber design with two different metasurfaces to improve this absorption and increase the efficiency of the solar absorber.
Juveriya Parmar   +2 more
doaj   +1 more source

Finite Temperature Ultraviolet-Visible Dielectric Functions of Tantalum Pentoxide: A Combined Spectroscopic Ellipsometry and First-Principles Study

open access: yesPhotonics, 2022
Tantalum pentoxide (Ta2O5) has demonstrated promising applications in gate dielectrics and microwave communication devices with its intrinsically high dielectric constant and low dielectric loss.
Wenjie Zhang   +7 more
doaj   +1 more source

Active multilayer mirrors for reflectance tuning at extreme ultraviolet (EUV) wavelengths [PDF]

open access: yes, 2012
We propose an active multilayer mirror structure for EUV wavelengths which can be adjusted to compensate for reflectance changes. The multilayer structure tunes the reflectance via an integrated piezoelectric layer that can change its dimension due to an
Bayraktar, M.   +6 more
core   +2 more sources

Room-Temperature Transient Absorption in KDP Crystal Under Exposure to Nanosecond Laser at 355 nm

open access: yesIEEE Photonics Journal, 2018
Defects in high-purity optical materials produced by high-power laser irradiation have attracted much attention, which could modify material properties and cause degradation or even laser damage of optical components.
F. Geng   +6 more
doaj   +1 more source

Extraction and Identification of the Pigment in the Adductor Muscle Scar of Pacific Oyster Crassostrea gigas. [PDF]

open access: yesPLoS ONE, 2015
In this study, UV (ultraviolet) and IR (infrared radiation) spectral analysis were integrated to identify the pigment in the adductor muscle scar of the Pacific oyster Crassostrea gigas. The pigment was extracted from the adductor muscle scars of cleaned
Shixin Hao   +5 more
doaj   +1 more source

Optical absorption of composites with metallic nanosized spheroidal particles

open access: yesХімія, фізика та технологія поверхні, 2023
The paper considers the problem of light absorption by a nanocomposite with randomly oriented metal spheroidal particles-inclusions, provided that the volume content of such inclusions is small. Expressions for the frequency dependences of the effective
N. I. Pavlyshche   +2 more
doaj   +1 more source

Photoluminescence emission spectra of Makrofol® DE 1-1 upon irradiation with ultraviolet radiation

open access: yesResults in Physics, 2017
Photoluminescence (PL) emission spectra of Makrofol® DE 1-1 (bisphenol-A based polycarbonate) upon irradiation with ultraviolet radiation of different wavelengths were investigated.
M. El Ghazaly, Abdulkadir Aydarous
doaj   +1 more source

Analysis of Spectral Characteristics of Certain Polyene Antibiotics in the Presence of Dmso and Cholesterol

open access: yesАнтибиотики и Химиотерапия
This work presents ultraviolet (UV) spectra of various concentrations of polyene antibiotics. The spectra of Levorin and Amphotericin B differ in three main absorption maxima.
G. H. Sultanova   +2 more
doaj   +1 more source

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