Speaker
Erik von Wahl
Description
See the full Abstract at http://ocs.ciemat.es/EPS2018ABS/pdf/O2.305.pdf
Laser induced fluorescence spectroscopy in a nanoparticle forming plasma
E. von Wahl1, S. Iséni1, T. Lecas1, T. Gibert1, S. Tsikata2, S. Mazouffre2, M. Mikikian1
1
GREMI, UMR7344 / CNRS-Univ. Orléans, F-45067 Orléans, France
2
ICARE, UPR3021 / CNRS, F-45067 Orléans, France
The presence of huge quantities of nanoparticles strongly modifies plasma properties [1, 2].
Collecting free electrons from the discharge [3], an increase of the electron temperature is
provoked [4] and, thus, the entire chemistry is changed. Not seldom even plasma instabilities
are created, some of them on time scales visible to the human eye [5, 6]. Because instabilities
are a tempo-spatial phenomenon, adequate techniques have to be applied in order to
understand their nature.
In this study laser induced fluorescence [7] and absorption [8] spectroscopy were used to
monitor the evolution of argon metastable atoms during the growth of dense nanoparticle
clouds from sputtering melamine-formaldehyde in a sealed RF plasma chamber. The
spectroscopic data are correlated with the pressure evolution and discharge current [9] to
comprehend the impact of localized effects, like void formation, on the entire process.
Acknowledgements:
This work was supported by Region Centre Val de Loire, project DYSCO n°201500104004.
[1] A. M. Hinz et al., J. Phys. D: Appl. Phys. 48 (2015) 055203
[2] M. Mikikian et al., Pure Appl. Chem., 83 (2010) pp. 1273-7282
[3] T. Wegner et al., Appl. Phys. Lett. 108 (2016) 063108
[4] V. Masserau-Guilbaud et al., IEEE Transactions on Plasma Science 41 (2013) pp. 816
[5] M. Mikikian, H. Tawidian and T. Lecas, Phys. Rev. Lett. 109 (2012) 245007
[6] L. Couëdel et al., Phys. Plasmas. 17 (2010) 083705
[7] I. Stefanović et al., Plasma Sources Sci. Technol. 26 (2017) 065014 (15pp)
[8] V. Sushkov, A-P. Herrendorf and R. Hippler, J. Phys. D: 49 (2016) 425201 (11pp)
[9] H. Tawidian, T. Lecas and M. Mikikian, Plasma Sources Sci. Technol. 23 (2014) 065009 (9pp)
