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Influence of chemistry and topology effects on superhydrophobic CF4-plasma-treated poly(dimethylsiloxane) (PDMS) (Articolo in rivista)

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Influence of chemistry and topology effects on superhydrophobic CF4-plasma-treated poly(dimethylsiloxane) (PDMS) (Articolo in rivista) (literal)

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Manca M., Cortese B., Viola I., Aricò A.S., Cingolati R. and Gigli G. (2008)
Influence of chemistry and topology effects on superhydrophobic CF4-plasma-treated poly(dimethylsiloxane) (PDMS)
in Langmuir; ACS, American chemical society, Washington, DC (Stati Uniti d'America)
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Since 2008 this article was cited 28 times, mainly by foreign authors publishing in international science journals. Web of Science Category: Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science, Multidisciplinary Subject Area: Chemistry; Materials Science 2008 journal's Impact Factor: 4.097 23/03/ (literal)

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\"[Manca, Michele; Cortese, Barbara] Univ Salento, Sez Nanosci Distretto Tecnol, Ist Super Univ Formaz Interdisciplinare, CNR,INFM,Natl Nanotechnol Labs, I-73100 Lecce, Italy; [Viola, Ilenia; Cingolani, Roberto; Gigli, Giuseppe] Univ Salento, Dipartimento Ingn Innovaz, CNR, INFM,Natl Nanotechnol Labs, I-73100 Lecce, Italy; [Arico, Antonino S.] CNR, ITAE Inst, I-98126 Messina, Italy (literal)

Titolo

Influence of chemistry and topology effects on superhydrophobic CF4-plasma-treated poly(dimethylsiloxane) (PDMS) (literal)

Abstract

Superhydrophobic surfaces are gaining considerable interest in a lot of different applications, and nonetheless, precise control over the wettability properties of such surfaces is still a challenge due to difficulties when controlling the effects independently induced on superhydrophobicity by the chemical and topological surface characteristics. We have fabricated engineered superhydrophobic surfaces onto poly(dimethylsiloxane) (PDMS) substrates by means of suitable CF4-plasma treatments. These treatments allowed the modification of both the morphological properties of the PDMS surface, due to a preferential etching of certain components of its macromolecules, and the chemical ones, by the deposition of a fluorinated layer. Chemical effects were separated from topological ones by performing a double replica molding process of the CF4-plasma-treated surfaces. This allowed us to obtain positive copies of the structured surfaces without the overlaying fluorinated coating affecting the surface chemistry. Such replicated surfaces showed a decrease of the contact angle if compared to the treated ones and therefore evidenced chemistry's weight in superhydrophobicity effects. In particular, we found that, for highly dense columnar-like PDMS microstructures, the effect of the plasma-deposited fluorinated layer covering surfaces produces an enhancement of the contact angle of about 20 degrees. (literal)

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