Investigation of the surface free energy of the ITO thin films deposited under different working pressure

2016 ◽  
Author(s):  
Soner Özen ◽  
Volkan Şenay ◽  
Suat Pat ◽  
Şadan Korkmaz
Keyword(s):  
Thin Films ◽  
Free Energy ◽  
Surface Free Energy ◽  
Working Pressure ◽  
Ito Thin Films

Thickness dependent wetting properties and surface free energy of HfO2 thin films

2016 ◽  
Vol 108 (23) ◽  
pp. 231602 ◽  
Author(s):  
Sergei Zenkin ◽  
Alexandr Belosludtsev ◽  
Šimon Kos ◽  
Radomír Čerstvý ◽  
Stanislav Haviar ◽  
...  
Keyword(s):  
Thin Films ◽  
Free Energy ◽  
Surface Free Energy ◽  
Wetting Properties

scholarly journals Deposition of Cellulose-Based Thin Films on Flexible Substrates

Materials ◽  
2018 ◽  
Vol 11 (12) ◽  
pp. 2433 ◽  
Author(s):  
Werner Schlemmer ◽  
Armin Zankel ◽  
Katrin Niegelhell ◽  
Mathias Hobisch ◽  
Michael Süssenbacher ◽  
...  
Keyword(s):  
Thin Films ◽  
Free Energy ◽  
Surface Free Energy ◽  
Film Formation ◽  
Copper Substrate ◽  
Substrate Roughness ◽  
Metal Chlorides ◽  
Cellulose Films ◽  
Metal Foils ◽  
Polyamide 6.6

This study investigates flexible (polyamide 6.6 PA-6.6, polyethylene terephthalate PET, Cu, Al, and Ni foils) and, for comparison, stiff substrates (silicon wafers and glass) differing in, for example, in surface free energy and surface roughness and their ability to host cellulose-based thin films. Trimethylsilyl cellulose (TMSC), a hydrophobic acid-labile cellulose derivative, was deposited on these substrates and subjected to spin coating. For all the synthetic polymer and metal substrates, rather homogenous films were obtained, where the thickness and the roughness of the films correlated with the substrate roughness and its surface free energy. A particular case was the TMSC layer on the copper foil, which exhibited superhydrophobicity caused by the microstructuring of the copper substrate. After the investigation of TMSC film formation, the conversion to cellulose using acidic vapors of HCl was attempted. While for the polymer foils, as well as for glass and silicon, rather homogenous and smooth cellulose films were obtained, for the metal foils, there is a competing reaction between the formation of metal chlorides and the generation of cellulose. We observed particles corresponding to the metal chlorides, while we could not detect any cellulose thin films after HCl treatment of the metal foils as proven by cross-section imaging using scanning electron microscopy (SEM).

scholarly journals Tuning the Wettability and Surface Free Energy of Poly(vinylphenol) Thin Films by Modulating Hydrogen-Bonding Interactions

Polymers ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 523 ◽  
Author(s):  
Chih-Feng Wang ◽  
Dula Daksa Ejeta ◽  
Jian-Yi Wu ◽  
Shiao-Wei Kuo ◽  
Ching-Hsuan Lin ◽  
...  
Keyword(s):  
Thin Films ◽  
Free Energy ◽  
Hydrogen Bonding ◽  
Thermal Treatment ◽  
Hydrogen Bonds ◽  
Surface Free Energy ◽  
Intermolecular Hydrogen Bonding ◽  
Intermolecular Hydrogen Bonds ◽  
Hydrogen Bonding Interactions ◽  
Effective Manner

The ability to tune the surface properties of a polymer film in a simple and effective manner is important for diverse biological, industrial, and environmental applications. In this work, we investigated whether or not the surface free energy of poly(vinyl phenol; PVPh) can be tuned by adjusting the casting solvent and the thermal treatment time, which alters the proportions of intra-and intermolecular hydrogen bonding interactions. Compared to the untreated sample, in tetrahydrofuran (THF) system, the thermal treatment resulted in a lower proportion of intermolecular hydrogen bonds and a concomitant decrease in the surface free energy (from 39.3 to 18.8 mJ/m2). In contrast, the thermal treatment in propylene glycol methyl ether acetate (PGMEA) and ethyl-3-ethoxypropionate (EEP) systems increased the proportion of intermolecular hydrogen bonds and the surface free energy of the polymer thin films, from 45.0 to 54.3 mJ/m2 for PGMEA and from 45.5 to 52.9 mJ/m2 for EEP. Controlling intermolecular hydrogen-bonding interactions is a unique and easy method for tuning the surface free energies of polymer substances.

scholarly journals Photoinduced Electron Transfer and Changes in Surface Free Energy in Polythiophene-Polyviologen Bilayered Thin Films

2021 ◽  
Author(s):  
Mary K. Danielson ◽  
Jie Chen ◽  
Anna K. Vaclavek ◽  
Nathan D. Colley ◽  
Abdul-Haq Alli ◽  
...  
Keyword(s):  
Thin Films ◽  
Electron Transfer ◽  
Free Energy ◽  
Surface Free Energy ◽  
Photoinduced Electron Transfer
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