Journal ArticleDOI
Laser-induced incandescence applied to metal nanostructures
TLDR
An initial characterization of the spectral and temporal signature of the laser-induced incandescence as a function of the excitation laser fluence and wavelength is presented.Abstract:
Laser-induced incandescence is both characterized and demonstrated for the measurement of metal nanoparticle concentration. Reported are the results of an initial characterization of the spectral and temporal signature of the laser-induced incandescence as a function of the excitation laser fluence and wavelength. Validation of the incandescence as a measure of the concentration is demonstrated by absorption measurements. Fluence dependence measurements are also presented. Double-pulse measurements determine the fluence for the onset of vaporization-induced mass loss. Comparisons between the present observations and those for carbon nanostructures are also made. Metals tested include (in order of increasing vaporization temperature) Fe, Ti, Mo, and W.read more
Citations
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Journal ArticleDOI
Particle identification by laser-induced incandescence in a solid-state laser cavity.
TL;DR: The laser-induced incandescence of a particle of unknown size and composition can be detected simultaneously with the light elastically scattered by the particle, providing information on both thesize and composition of the particle.
Journal ArticleDOI
Laser-induced incandescence: Particulate diagnostics for combustion, atmospheric, and industrial applications
TL;DR: A review of laser-induced incandescence (LII) for combustion diagnostics can be found in this paper, where the authors consider two variants of LII, one that is based on pulsed-laser excitation and has been mainly used in combustion diagnostic and emissions measurements, and an alternate approach that relies on continuous-wave lasers and has become increasingly popular for measuring black carbon in environmental applications.
Journal ArticleDOI
Flame aerosol synthesis of nanostructured materials and functional devices: Processing, modeling, and diagnostics
TL;DR: In this paper, the authors focus mainly on the recent trends in specific applications of flame aerosol synthesis in the last decade, e.g., usage of a substrate in stagnation geometry with controlled particle temperature-time history, application of external fields to control particle characteristics, development of advanced spray technique for doping synthesis of nanocomposites of multicomponent metal oxides or carbon-metal oxides, and fabrication of nanomaterial-based functional devices.
Journal ArticleDOI
Size distributions of nanoscaled particles and gas temperatures from time-resolved laser-induced-incandescence measurements
TL;DR: Heat and mass transfer kinetics of the LII process are determined from measured soot particle temperatures, flame temperatures, and particle sizes, and uncertainty of current LII models are attributed to processes during the absorption of the laser pulse.
Journal ArticleDOI
Laser-induced incandescence for soot diagnostics at high pressures
TL;DR: Pressure does not systematically affect the relationship between LII signal and laser fluence, and this observation is consistent with the prediction of heat-transfer models in the free-molecular regime.
References
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Soot particle measurements in diffusion flames
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Soot diagnostics based on laser heating
TL;DR: Numerical calculations have investigated the possibility of developing soot diagnostics based on laser heating of the soot particles using the laser-modulated incandescence of the particles and the direct detection of the evaporated C2 molecules.
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Morphology of flame-generated soot as determined by thermophoretic sampling
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Luminescence of silicon materials : chains, sheets, nanocrystals, nanowires, microcrystals, and porous silicon
TL;DR: In this article, the responsible electronic quantum size effects and excited-state photophysics were discussed and analyzed for both nanocrystal silicon and porous silicon thin films, and the possibility of incorporating optically active, silicon-based material into integrated circuit processing was discussed.
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Laser-induced breakdown of gases
TL;DR: In this paper, the authors examined the role of multiphoton absorption and inverse bremsstrahlung or cascade collisional ionization in the early stages of the formation of plasma.