http://www.cnr.it/ontology/cnr/individuo/prodotto/ID34236

Nanotexturing of Polystyrene Surface in Fluorocarbon Plasmas: From Sticky to Slippery Superhydrophobicity (Articolo in rivista)

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Nanotexturing of Polystyrene Surface in Fluorocarbon Plasmas: From Sticky to Slippery Superhydrophobicity (Articolo in rivista) (literal)

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Alternative label

R.Di Mundo; F. Palumbo; R. d'Agostino (2008)
Nanotexturing of Polystyrene Surface in Fluorocarbon Plasmas: From Sticky to Slippery Superhydrophobicity
in Langmuir; American Chemical Society, Washington (Stati Uniti d'America)
(literal)

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Department of Chemistry, UniVersity of Bari Institute for Inorganic Methodologies and Plasmas (IMIP)-CNR, Plasma Solution srl, Via Orabona 4, 70126 Bari, Italy (literal)

Titolo

Nanotexturing of Polystyrene Surface in Fluorocarbon Plasmas: From Sticky to Slippery Superhydrophobicity (literal)

Abstract

In this work plasma etching processes have been studied to roughen and fluorinate polystyrene surface as an easy method to achieve a superhydrophobic slippery character. Radiofrequency discharges have been fed with CF(4)/O(2) mixtures and the effect of the O(2):CF(4) ratio, the input power, and the treatment duration have been investigated in terms of wettability, with focus on sliding performances. For this purpose, surface morphological variations, evaluated by means of scanning electron microscopy and atomic force microscopy, together with the chemical assessment by X-ray photoelectron spectroscopy, have been conrelated with water contact angle hysteresis and volume resolved sliding angle measurements. Results indicate that by increasing the height and decreasing the density of the structures formed by etching, within a tailored range, a transition from sticky to slippery superhydrophobicity occurs. A short treatment time (5 min) is sufficient to obtain Such an effect, provided that a high power input is utilized. Optimized surfaces show a unaltered transparency to visible light according to the low roughness produced. (literal)

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