Changes in enamel after bleaching pre-treatment with non-thermal atmospheric plasma

Ruivo, Melissa A.; Nima, Gabriel; Pacheco, Rafael Rocha; Lancellotti, Ailla Carla; Palma‐Dibb, Regina Guenka; Faraoni, Juliana Jendiroba; Soares, Luis E.S.; Martins, A.A.; Lopes, Bruno Bellotti; Giannini, Marcelo

doi:10.1016/j.cpme.2020.100106

Cited by 2 publications

(2 citation statements)

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“…Atmospheric-pressure non-equilibrium plasmas (APNEPs) can maintain a high electron temperature while maintaining a low gas temperature, unlike thermal plasmas such as arc discharge and discharge plasmas, which typically have elevated gas temperatures. Owing to this property, it is possible to perform processes such as surface processing [1,2], sterilization [3], and tooth bleaching [4,5] without damaging the objects. Therefore, APNEP has attracted considerable research attention in recent years in various fields such as medicine [4][5][6][7], transition of electrons from the upper to lower levels, whereas the continuum spectrum is the bremsstrahlung emitted by the collision of electrons and atoms [13].…”

Section: Introductionmentioning

confidence: 99%

“…Owing to this property, it is possible to perform processes such as surface processing [1,2], sterilization [3], and tooth bleaching [4,5] without damaging the objects. Therefore, APNEP has attracted considerable research attention in recent years in various fields such as medicine [4][5][6][7], transition of electrons from the upper to lower levels, whereas the continuum spectrum is the bremsstrahlung emitted by the collision of electrons and atoms [13]. The line spectrum can be analyzed using the collisional-radiative model (CRM) for atmospheric-pressure non-equilibrium Ar plasma, and the theoretical excited-state number density obtained by the CRM is compared with the experimentally measured line spectrum to obtain T e and n e .…”

Section: Introductionmentioning

confidence: 99%

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Spectroscopic measurement of atmospheric-pressure non-equilibrium Ar plasma using continuum and line spectra

Kikuchi,

Yamashita,

Nezu

et al. 2024

J. Phys. D: Appl. Phys.

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A robust method for determining the electron temperature and density of atmospheric-pressure non-equilibrium argon plasmas is reported. The methodology is based on the analysis of the continuum and line spectra of the plasma. Assuming that the electron energy distribution function (EEDF) is expressed as a two-temperature generalized EEDF (GEEDF), the gamma value of the GEEDF is determined through a grid search of the continuum spectrum analysis given by the bremsstrahlung process, which minimizes the mean-squared logarithmic error (MSLE). In addition, the relationship between the gamma value and the electron temperature and density is determined. Utilizing this relationship, the electron temperature and density are determined by minimizing the MSLE between the excited-state densities obtained from the line spectrum analysis and numerically calculated using the collisional-radiative model. This methodology yielded results that satisﬁed both continuum and line spectrum analyses. In addition, the same analysis was conducted either by continuum spectrum analysis or by line spectrum alone to compare the results.

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