Speaker
Lenka Zajickova
Description
See the full Abstract at http://ocs.ciemat.es/EPS2018ABS/pdf/P1.3004.pdf
Insight into plasma polymerization of cyclopropylamine in low pressure
capacitive RF discharges
L. Zajíčková1 , M. Michlíček1 , P. Papp2 , M. Danko2 , S. Hamaguchi3
1 Masaryk University, Brno, Czech Republic
2 Comenius University, Bratislava, Slovakia
3 Osaka University, Osaka, Japan
Materials modified by thin films with amine groups are promising for many bioapplications.
It requires tuning the film stability in aqueous media because nitrogen(amine)-rich PPs tend to
dissolve and lose the nitrogen functionalities by hydrolysis [1]. The stability can be improved by
an increase of plasma power at the expenses of amine concentration in the films [2]. Recently,
we started a series of studies with PP of cyclopropylamine (CPA) in argon capacitively coupled
plasma, either at the floating [3] or RF-biased potential [4]. At certain conditions, the PP-CPA
films deposited at the floating and RF-biased surfaces had similar concentration of NH2 groups
but better water stability was achieved at the RF electrode due to better cross-linking. The
stability in water turned out to be more important than the amount of NHx groups in the studies
of mouse muscle myoblasts viability [6], whereas the performance of the films deposited at the
floating potential was much better in the immobilization of biomolecules [5].
This work provides insight into fundamental aspects of the CPA plasma polymerization by
putting together the results from electron beam experiments with CPA molecule, molecular
dynamics simulations of CPA/Ar plasma interaction with surfaces and direct investigation of
the CPA/Ar plasma. The plasma phase processes were investigated by mass/ion spectrometry
and optical emission spectroscopy, whereas surface processes, mainly the ion bombardment,
were studied by retarding field energy analyzer.
References
[1] A. Contreras-García, M. Wertheimer, Plasma Chem. Plasma Process. 33, 147 (2013)
[2] Z. Zhang, Q. Chen, W. Knoll, R. Foerch, R. Holcomb, D. Roitman, Macromolecules 36, 7689 (2003)
[3] A. Manakhov, L. Zajíčková, M. Eliáš et al., Plasma Process. Polym. 11, 532 (2014)
[4] A. Manakhov, D. Nečas, J. Čechal, M. Eliáš, L. Zajíčková, Thin Solid Films 581, 7 (2015)
[5] E. Makhneva, A. Manakhov, P. Skládal, L. Zajíčková, Surf. Coat. Technol. 290, 116 (2015)
[6] A. Manakhov, M. Landová, J. Medalová et al., Plasma Process. Polym. 2017 14, e1600123 (2017)
