RMS roughness-independent tuning of surface wettability by tailoring silver nanoparticles with a fluorocarbon plasma polymer

0487170 - FZÚ 2018 RIV GB eng J - Journal Article
Choukourov, A. - Kylián, O. - Petr, M. - Vaidulych, M. - Nikitin, D. - Hanuš, J. - Artemenko, Anna - Shelemin, A. - Gordeev, Ivan - Kolská, Z. - Solař, P. - Khalakhan, I. - Ryabov, A. - Májek, J. - Slavínská, D. - Biederman, H.
RMS roughness-independent tuning of surface wettability by tailoring silver nanoparticles with a fluorocarbon plasma polymer.
Nanoscale. Roč. 9, č. 7 (2017), s. 2616-2625. ISSN 2040-3364. E-ISSN 2040-3372
R&D Projects: GA MŠMT LM2015088
Institutional support: RVO:68378271
Keywords : high adhesive force * ion release * films * coatings * stability * SiO₂ * PTFE * size * nanoclusters * clusters
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 7.233, year: 2017

A layer of 14 nm-sized Ag nanoparticles undergoes complex transformation when overcoated by thin films of a fluorocarbon plasma polymer. Two regimes of surface evolution are identified, both with invariable RMS roughness. In the early regime, the plasma polymer penetrates between and beneath the nanoparticles, raising them above the substrate and maintaining the multivalued character of the surface roughness. The growth (beta) and the dynamic (1/z) exponents are close to zero and the interface bears the features of self-affinity. The presence of inter-particle voids leads to heterogeneous wetting with an apparent water contact angle theta(a) = 135 degrees. The multivalued nanotopography results in two possible positions for the water droplet meniscus, yet strong water adhesion indicates that the meniscus is located at the lower part of the spherical nanofeatures. In the late regime, the inter-particle voids become filled and the interface acquires a single valued character.
Permanent Link: http://hdl.handle.net/11104/0281846