scholarly journals Explosive vaporization of metallic nanostructures on a surface by nanosecond laser heating under fluids

2021 ◽  
Vol 129 (6) ◽  
pp. 064901
Author(s):  
Venkatanarayana Prasad Sandireddy ◽  
Krishna Prasad Koirala ◽  
Gerd Duscher ◽  
Ramki Kalyanaraman
Keyword(s):  
Laser Heating ◽  
Metallic Nanostructures ◽  
Nanosecond Laser ◽  
Explosive Vaporization

scholarly journals A review on determining the refractive index function, thermal accommodation coefficient and evaporation temperature of light-absorbing nanoparticles suspended in the gas phase using the laser-induced incandescence

2018 ◽  
Vol 7 (6) ◽  
pp. 583-604 ◽  
Author(s):  
Evgeny Valerievich Gurentsov
Keyword(s):  
Refractive Index ◽  
Physical Properties ◽  
Laser Heating ◽  
Volume Fraction ◽  
Accommodation Coefficient ◽  
Nanosecond Laser ◽  
Index Function ◽  
Evaporation Temperature ◽  
Laser Induced Incandescence ◽  
Thermo Physical Properties

AbstractIn this review, the possibility of using pulsed, nanosecond laser heating of nanoparticles (NPs) is demonstrated, in order to investigate their thermo-physical properties. This approach is possible because the laser heating produces high NP temperatures that facilitate the observation of their thermal radiation (incandescence). This incandescence depends on the thermo-physical properties of the NPs, such as heat capacity, density, particle size, volume fraction and the refractive index of the particle material, as well as on the heat-mass transfer between the NPs and the surrounding gas media. Thus, the incandescence signal carries information about these properties, which can be extracted by signal analyses. This pulsed laser heating approach is referred to as laser-induced incandescence. Here, we apply this approach to investigate the properties of carbon, metal and carbon-encapsulated Fe NPs. In this review, the recent results of the measurements of the NP refractive index function, thermal energy accommodation coefficient of the NP surface with bath gas molecules and the NP evaporation temperature obtained using laser-induced incandescence are presented and discussed.

Pulsed repetition rate nanosecond laser heating and ablation of the tokamak graphite tile deposited layers

2012 ◽  
Vol 420 (1-3) ◽  
pp. 198-206 ◽  
Author(s):  
A. Semerok ◽  
S.V. Fomichev ◽  
F. Brygo ◽  
P.-Y. Thro ◽  
C. Grisolia
Keyword(s):  
Repetition Rate ◽  
Laser Heating ◽  
Nanosecond Laser

Nanosecond laser photothermal effect-triggered amplification of photochromic reactions in diarylethene nanoparticles

2020 ◽  
Vol 56 (52) ◽  
pp. 7088-7091
Author(s):  
Yukihide Ishibashi ◽  
Shoki Nakai ◽  
Keisuke Masuda ◽  
Daichi Kitagawa ◽  
Seiya Kobatake ◽  
...  
Keyword(s):  
Laser Heating ◽  
Photochemical Reaction ◽  
Photothermal Effect ◽  
Nanosecond Laser

A photosynergetic response coupled with nanoscale laser heating and the photochemical reaction in nanoparticles resulted in the drastic enhancement of the cycloreversion reaction in aqueous diarylethene nanocolloids.

Uncertainty Analysis of Solid-Liquid-Vapor Phase Change of a Metal Particle Subject to Nanosecond Laser Heating

2012 ◽  
Author(s):  
Hao Peng ◽  
Yuwen Zhang ◽  
P. Frank Pai
Keyword(s):  
Phase Change ◽  
Vapor Phase ◽  
Laser Heating ◽  
Metal Particles ◽  
Nanosecond Laser ◽  
Uncertain Parameters ◽  
Interface Location ◽  
Solid Liquid Interface ◽  
Solid Liquid ◽  
Liquid Vapor

Effects of uncertainties of various parameters, including laser fluence, diameter of metal powder articles, laser pulse width and initial temperature of metal particles, on solid-liquid-vapor phase change processes of metal particles under nanosecond laser heating are investigated in this paper. A systematic approach of simulating phase change with uncertain parameters are presented and a sample-based stochastic model are established to investigate the influence of different uncertain parameters on maximum surface temperature of metal particles, maximum solid-liquid interface location, maximum liquid-vapor interface location, maximum saturation temperature and maximum recoil pressure, and time needed to reach maximum solid-liquid interface location. The results show that the mean value and standard deviation of laser fluence have dominant effects on all output parameters.

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