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Journal

2015 | 13 | 1 |

Article title

Layer-by-layer assembly of thin organic films on PTFE activated by cold atmospheric plasma

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EN

Abstracts

EN
An air diffuse coplanar surface barrier discharge is used to activate the surface of polytetrafluoroethylene (PTFE) samples, which are subsequently coated with polyvinylpyrrolidone (PVP) and tannic acid (TAN) single, bi- and multilayers, respectively, using the dip-coating method. The surfaces are characterized by X-ray Photoelectron Spectroscopy (XPS), Attenuated Total Reflection – Fourier Transform Infrared Spectroscopy (ATR-FTIR) and Atomic Force Microscopy (AFM). The XPS measurements show that with plasma treatment the F/C atomic ratio in the PTFE surface decreases, due to the diminution of the concentration of CF2 moieties, and also oxygen incorporation through formation of new C–O, C=O and O=C–O bonds can be observed. In the case of coated samples, the new bonds indicated by XPS show the bonding between the organic layer and the surface, and thus the stability of layers, while the gradual decrease of the concentration of F atoms with the number of deposited layers proves the creation of PVP/TAN bi- and multi-layers. According to the ATR-FTIR spectra, in the case of PVP/TAN multilayer hydrogen bonding develops between the PVP and TAN, which assures the stability of the multilayer. The AFM lateral friction measurements show that the macromolecular layers homogeneously coat the plasma treated PTFE surface.

Publisher

Journal

Year

Volume

13

Issue

1

Physical description

Dates

received
12 - 2 - 2014
online
22 - 12 - 2014
accepted
7 - 5 - 2014

Contributors

author
  • Research Centre for Natural Sciences of the Hungarian Academy of Sciences, Institute of Materials and Environmental Chemistry, Magyar tudósok körútja 2, H-1117 Budapest, Hungary
  • Research Centre for Natural Sciences of the Hungarian Academy of Sciences, Institute of Materials and Environmental Chemistry, Magyar tudósok körútja 2, H-1117 Budapest, Hungary
  • Research Centre for Natural Sciences of the Hungarian Academy of Sciences, Institute of Materials and Environmental Chemistry, Magyar tudósok körútja 2, H-1117 Budapest, Hungary
  • Research Centre for Natural Sciences of the Hungarian Academy of Sciences, Institute of Materials and Environmental Chemistry, Magyar tudósok körútja 2, H-1117 Budapest, Hungary
  • Masaryk University, R&D Center for Low-Cost Plasma and Nanotechnology Surface Modifications, Kotlářská 2, 611 37 Brno, Czech Republic
  • Masaryk University, R&D Center for Low-Cost Plasma and Nanotechnology Surface Modifications, Kotlářská 2, 611 37 Brno, Czech Republic
author
  • Wigner Research Centre for Physics of the Hungarian Academy of Sciences, Institute for Solid State Physics and Optics, Konkoly Thege M. út 29-33, H-1121 Budapest, Hungary

References

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Document Type

Publication order reference

Identifiers

YADDA identifier

bwmeta1.element.-psjd-doi-10_1515_chem-2015-0072
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