Radiation-stimulated explosive evaporation and burning of hydrogen droplets in hot aerosol mixtures

2016 ◽  
Vol 108 (24) ◽  
pp. 244103 ◽  
Author(s):  
V. V. Osipov ◽  
M. P. Marchenko ◽  
M. Khasin
Keyword(s):  
Explosive Evaporation

Pulsed Laser Deposition of Thin Metallic Multilayers and Amorphous Films

1992 ◽  
Vol 285 ◽  
Author(s):  
Hans-Ulrich Krebs ◽  
Olaf Bremert
Keyword(s):  
Ablation Threshold ◽  
Pulsed Laser ◽  
Film Surface ◽  
The Other ◽  
Laser Deposition ◽  
Metallic Multilayers ◽  
Amorphous Films ◽  
Deposition Rates ◽  
Excimer Laser Ablation ◽  
Explosive Evaporation

ABSTRACTThe method of pulsed excimer laser ablation using KrF radiation was applied for the deposition of thin metallic elementary multilayers. Above an ablation threshold of about 5 J/cm2 an ‘explosive’ evaporation of the metallic targets occurs leading to high deposition rates of up to 5 nm/s. For different metals, the ablation threshold slightly varies leading at the same laser fluence to different growth rates as shown for Ag, Fe, Zr and Nb. By using two elementary targets and adjusting the dwelling times on both targets, Fe/Ag, Fe/Zr and Fe/Nb multilayers of different bilayer thicknesses were deposited. While Fe/Ag superstructures show crystalline phases down to a periodicity of 1 nm, Fe/Zr and Fe/Nb films are amorphous at such wavelengths. On the other side, Fe/Nb multilayers can also be amorphized by a solid state interdiffusion reaction of the elementary multilayers. The surfaces of the grown films are smooth except for a small number of droplets on the film surface.

scholarly journals Laser Printing of Plasmonic Nanosponges

Nanomaterials ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 2427
Author(s):  
Sergey Syubaev ◽  
Stanislav Gurbatov ◽  
Evgeny Modin ◽  
Denver P. Linklater ◽  
Saulius Juodkazis ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Noble Metals ◽  
Ion Beam ◽  
Three Dimensional ◽  
Nanosecond Laser ◽  
Toxic Compounds ◽  
Nanosecond Laser Ablation ◽  
Nucleation Sites ◽  
Explosive Evaporation ◽  
Discharge Gas

Three-dimensional porous nanostructures made of noble metals represent novel class of nanomaterials promising for nonlinear nanooptics and sensors. Such nanostructures are typically fabricated using either reproducible yet time-consuming and costly multi-step lithography protocols or less reproducible chemical synthesis that involve liquid processing with toxic compounds. Here, we combined scalable nanosecond-laser ablation with advanced engineering of the chemical composition of thin substrate-supported Au films to produce nanobumps containing multiple nanopores inside. Most of the nanopores hidden beneath the nanobump surface can be further uncapped using gentle etching of the nanobumps by an Ar-ion beam to form functional 3D plasmonic nanosponges. The nanopores 10–150 nm in diameter were found to appear via laser-induced explosive evaporation/boiling and coalescence of the randomly arranged nucleation sites formed by nitrogen-rich areas of the Au films. Density of the nanopores can be controlled by the amount of the nitrogen in the Au films regulated in the process of their magnetron sputtering assisted with nitrogen-containing discharge gas.

Structural study of light-emitting nanocomposites based on ZnS:Cu deposited by explosive evaporation method on porous anodic Al2O3 matrices

2016 ◽  
Vol 57 (7) ◽  
pp. 1417-1421
Author(s):  
A. N. Beltyukov ◽  
A. I. Chukavin ◽  
R. G. Valeev ◽  
A. L. Trigub ◽  
I. A. El’kin ◽  
...  
Keyword(s):  
Structural Study ◽  
Light Emitting ◽  
Evaporation Method ◽  
Explosive Evaporation

An experimental study on the temperature dependence of CO2 explosive evaporation

2013 ◽  
Vol 26 (4) ◽  
pp. 830-838 ◽  
Author(s):  
M.M. van der Voort ◽  
R.M.M. van Wees ◽  
J.M. Ham ◽  
M.P.N. Spruijt ◽  
A.C. van den Berg ◽  
...  
Keyword(s):  
Experimental Study ◽  
Temperature Dependence ◽  
Explosive Evaporation

scholarly journals EUV Emission Sources in Gas-Dynamic Models of Stellar Flares

1996 ◽  
Vol 152 ◽  
pp. 171-174
Author(s):  
M.A. Livshits ◽  
M.M. Katsova
Keyword(s):  
Energy Release ◽  
Dynamic Models ◽  
Thermal Front ◽  
Euv Emission ◽  
Stellar Flares ◽  
Single Burst ◽  
Explosive Evaporation ◽  
Impulsive Heating ◽  
Stellar Chromosphere ◽  
Flare Model

A stellar flare model in which the main energy release is located above the chromosphere based on a set of elementary acts of the electron acceleration or impulsive heating of plasma is discussed. The response of the chromosphere to impulsive heating for both a single burst and the simultaneous effect of a set of the bursts is considered.The results of numerical modeling of the process of explosive evaporation of the stellar chromosphere allow us to select 3 classes of EUV emission source: (1) the bursts of the EUV emission in the temperature range of 3 · 104 – 3 · 105 K at the beginning of each of elementary act of the energy release; (2) the bursts of the EUV emission at temperatures T ≈ 106 K, accompanied by outflow of heated plasma; (3) the EUV emission, caused by new features of the process, namely, when the maxima of the distribution of the pressure are forming in the region of the downward-moving thermal front.The properties of the EUV sources, velocities of the plasma motions therein, and possible behaviour of the light curve for an elementary burst are discussed.

scholarly journals Properties of nanosized ΖnO: Ho films deposited using explosive evaporation

2021 ◽  
Vol 24 (02) ◽  
pp. 139-147
Author(s):  
А.М. Kаsumov ◽  
◽  
V.V. Strelchuk ◽  
О.F. Kolomys ◽  
О.І. Bykov ◽  
...  
Keyword(s):  
Xrd Analysis ◽  
Charge Carriers ◽  
Crystalline Lattice ◽  
Synthesis Methods ◽  
High Deposition Rate ◽  
Photocatalytic Process ◽  
Electrical And Optical Properties ◽  
Long Wave ◽  
Explosive Evaporation ◽  
Oxide Characteristics

The properties of nanosized ZnO:Ho thin films deposited by explosive evaporation method have been studied. This work is aimed at studying the effect of high deposition rate on the oxide characteristics interesting from the viewpoint of photocatalysis, namely: morphology and structure, electrical and optical properties, lifetime of charge carriers. Explosive deposition of films defines the novelty of this work as compared to majority of previous studies devoted to nanosized ZnO:Ho photocatalysts, which used equilibrium methods for their synthesis. Methods of scanning electron microscopy, XRD analysis, photoluminescence, and Raman scattering have shown that in ZnO:Ho films deposited using explosive evaporation, with increasing holmium content, amorphization of their structure and morphology are observed. It is related with random incorporation of holmium atoms into the crystalline lattice of ZnO as well as with the fact that the ionic radius of Ho3+ exceeds that of Zn2+. It is accompanied by a shift of the edge of ZnO absorption toward the long-wave (blue) spectral range, the decrease of the bandgap as well as an increase in the resistivity and lifetime of charge carriers. All these changes are favourable for the photocatalytic process involving nanostructures based on ZnO:Ho

Explosive evaporation in solar flares

1987 ◽  
Vol 317 ◽  
pp. 502 ◽  
Author(s):  
George H. Fisher
Keyword(s):  
Solar Flares ◽  
Explosive Evaporation
Sign in / Sign up

Export Citation Format

Share Document