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Superhydrophobicity due to the hierarchical scale roughness of PDMS surfaces (Articolo in rivista)

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Superhydrophobicity due to the hierarchical scale roughness of PDMS surfaces (Articolo in rivista) (literal)

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Cortese, B; D'Amone, S; Manca, M; Viola, I; Cingolani, R; Gigli, G (2008)
Superhydrophobicity due to the hierarchical scale roughness of PDMS surfaces
in Langmuir; ACS, American chemical society, Washington, DC (Stati Uniti d'America)
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Since 2008 this article was cited 59 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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\"[Cortese, Barbara; D'Amone, Stefania; Manca, Michele; Viola, Ilenia; Cingolani, Roberto; Gigli, Giuseppe] Univ Salento, CNR, INFM, NNL,Dist Technol, I-73100 Lecce, Italy (literal)

Titolo

Superhydrophobicity due to the hierarchical scale roughness of PDMS surfaces (literal)

Abstract

Wettability control has been widely investigated in the last decades for technological applications such as microfluidic devices and self-cleaning surfaces by modifying both the chemical composition and the geometric structure of the surfaces. Inspired by the typical morphology of superhydrophobic leaves (such as lotus leaves), we have developed a dual-scale roughness, micro- and nanosized, on polydimethylsiloxane (PDMS) surfaces. By combining different geometric parameters and plasma treatment conditions, the structures were controlled hierarchically, at different independent length scales. Both the microsized replicated pillars and the nanosized etched posts tuned the wettability of the PDMS surfaces in a very simple way, up to contact angles of 170 degrees. Furthermore, changes in the influence of micro- and nanoscale geometrical structures were investigated. Hysteresis and contact angles of water droplets are evaluated as a combined effect of micropillars and a superimposed roughness, resulting in high advancing contact angles and low sliding angles. (literal)

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