TY - JOUR A1 - Grytsenko, Kostyantyn A1 - Ksianzou, Viachaslau A1 - Kolomzarov, Yurii A1 - Lytvyn, Peter A1 - Dietzel, Birgit A1 - Schrader, Sigurd T1 - Fluoropolymer Film Formation by Electron Activated Vacuum Deposition JF - Surfaces N2 - Polytetrafluoroethylene (PTFE), polyhexafluoropropylene (PHFP) and polychlorotrifluoroethylene (PCTFE) were heated to their decomposition temperature in a high vacuum. The emitted fragments passed an electron cloud, condensed on a substrate and formed fluoropolymer film. Growth rate of PTFE and PHFP films increased up to a factor five in the presence of the electron cloud. Mass spectrometry revealed changes in the mass spectra of fragments generated by thermal decomposition only and formed under electron activation. The observed changes were different for each fluoropolymer. Infrared spectroscopy (IRS) showed that the structure of the films was close to the structure of the bulk polymers. Atomic force microscopy (AFM) has revealed different morphologies of PTFE, PHFP and PCTFE films, suggesting a Volmer–Weber growth mechanism for PTFE and PHFP but a Frank-van der Merwe one for PCTFE. All films were smooth at nanoscale and transparent from ultraviolet to near-infrared region. Additional radio frequency (RF) plasma ignited in the emitted fragments at a low pressure increased mechanical characteristics of the films without losing their optical transparency and smoothness. KW - fluoropolymer thin film KW - vacuum deposition KW - polymerization KW - plasma KW - surface Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:526-opus4-13786 SN - 2571-9637 VL - 4 IS - 1 SP - 66 EP - 80 PB - MDPI ER - TY - CHAP A1 - Grytsenko, Kostyantyn A1 - Doroshenko, T. A1 - Kolomzarov, Yurii A1 - Prokopets, Vadym M. A1 - Fedoriak, O. A1 - Zelinski, R. A1 - Lytvyn, Oksana A1 - Prescher, Dietrich A1 - Grimm, Bernd A1 - Ksianzou, Viachaslau A1 - Schrader, Sigurd A1 - Tolmachev, O. I. A1 - Slominskii, Yu L. A1 - Kurdiukov, V. A1 - Smirnova, G. T1 - Research on the growth of dye film in vacuum in situ N2 - Organic film deposition in vacuum is fast developing scientific and industrial domain. We developed installation for deposition of organic films equipped with optical spectrometer for measurements in situ. We are developing new dyes aimed for application in waveguide sensor, nonlinear optics and studying film organisation during deposition. Fluorinated azo-dyes and azomethine dyes were synthesized at University of Applied Sciences Wildau and at the Institute of Organic Chemistry, Kyiv. Compounds were evaporated at a pressure of 10-3 Pa using resistive heated crucible. Glass and glass covered with polytetrafluoroethylene (PTFE) film are used as substrates. The films were studied with Polytec and StellarNet spectrometers and an atomic force microscope. Optical spectra of the dye films revealed, that some compounds were decomposed during evaporation. Several kinds of dyes were evaporated and deposited without decomposition. Some deposited films formed H-aggregates and other types of aggregates. AFM images of dye films showed that their morphology depends on the chemical structure of the compounds and on the nature of the substrate on which the film was grown. KW - dye KW - solid KW - film KW - in situ KW - optical spectra KW - vacuum deposition Y1 - 2008 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:526-opus4-15206 SP - 318 EP - 323 PB - Society of Photo-Optical Instrumentation Engineers (SPIE) ER -