Diffusion model for the laser oxidation of metallic samples in air

Ursu, I.; Nanu, L.; Mihăilescu, I. N.

doi:10.1063/1.97401

Cited by 26 publications

(3 citation statements)

References 10 publications

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“…The decrease in reflectance that is observed as metals are heated can be modeled using the Wagner theory in which a Fick's Law diffusion of oxygen through the oxide layer is assumed to be the controlling effect. [49][50][51] In this model, the assumption is made that oxygen must diffuse through the oxide layer for further oxidation and, thus,…”

Section: Oxidation Theorymentioning

confidence: 99%

Dynamic bidirectional reflectance distribution functions: Measurement and representation

Bailey

Early

Keppler

et al. 2008

Journal of Laser Applications

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Section: Oxidation Theorymentioning

confidence: 99%

Dynamic bidirectional reflectance distribution functions: Measurement and representation

Bailey

Early

Keppler

et al. 2008

Journal of Laser Applications

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Section: Introductionmentioning

confidence: 99%

“…Fortunately, laser-enhanced phenomena have been observed in various circumstances. Let us mention oxidation of silicon [ l to 81 and copper [9], oxygen chemisorption on GaAs [lo], fluorination of Si [ l l ] , decomposition of CdTe [12], diffusion of interstitial A1 in Si [13], dislocations in GaAs [la], F ions in CdTe [15], sputtering of various semiconductors [le]. These data are interpreted on the basis of models in which electronic excitation either produces local excited states with special cohesive or migration properties, or enhances diffusion during recombination itself [13, 16. to 181.…”

Section: Introductionmentioning

confidence: 99%

Modelling the Role of Electronically Excited States in Laser‐Assisted Phenomena

Wautelet

Gehain

Quenon

1988

Physica Status Solidi (b)

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From available relations between thermodynamical and microscopic parameters, the role of electronically excited sites on bond breaking and atomic migration is studied. It is demonstrated that, in covalent materials, electronic excitation leads to a decrease of the activation energy for bond breaking and migration, and of the entropy for migration, and to an increase of the entropy for bond breaking. It is also predicted that, under some circumstances, laser excitation might give rise t o a decrease of reaction rate above a critical temperature, independent on the photon flux. The shift of the equilibrium position between competing processes is discussed, in the presence of selective excitation. The previous arguments are compared with available experimental data. Hints for future experiments are given.Ausgehend von Beziehungen zwischen thermodynamischen und mikroskopischen Parametern wird die Rolle elektronisch angeregter Bereiche auf die Bindungsbrechung und Atomwanderung untersucht. Es zeigt sich, daS in kovalenten Materialien elektronische Anregung zu einer Abnahme der Aktivierungsenergien fur Bindungsbrechung und Wanderung sowie der Rntropie fur Wanderung, und zu einer Zunahme der Entropie fur Bindungsbrechung fiihrt. Ferner ergibt sich die Voraussage, daS unter gewissen Umstanden Laseranregung jenseits einer kritischen Temperatur zu einer Abnahme der Reaktionsrate fuhren kann, die vom PhotonenfluS unabhangig ist. Die Verschiebung des Gleichgewichts zwischen konkurrierenden Prozessen wird fur den Fall selektiver Anregung diskutiert. Die Ergebnisse der uberlegungen werden mit experimentellen Daten verglichen, und Anregungen fur weitere Experimente werden gegeben.

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