Details

Autor(en) / Beteiligte

• Ondarçuhu, Thierry
• Thomas, Vincent
• Nuñez, Marc
• Dujardin, Erik
• Rahman, Atikur
• Black, Charles T.
• Checco, Antonio

Titel

Wettability of partially suspended graphene

Ist Teil von

• Scientific reports, 2016-04, Vol.6 (1), p.24237-24237, Article 24237

Ort / Verlag

London: Nature Publishing Group UK

Erscheinungsjahr

2016

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• The dependence of the wettability of graphene on the nature of the underlying substrate remains only partially understood. Here, we systematically investigate the role of liquid-substrate interactions on the wettability of graphene by varying the area fraction of suspended graphene from 0 to 95% by means of nanotextured substrates. We find that completely suspended graphene exhibits the highest water contact angle (85° ± 5°) compared to partially suspended or supported graphene, regardless of the hydrophobicity (hydrophilicity) of the substrate. Further, 80% of the long-range water-substrate interactions are screened by the graphene monolayer, the wettability of which is primarily determined by short-range graphene-liquid interactions. By its well-defined chemical and geometrical properties, supported graphene therefore provides a model system to elucidate the relative contribution of short and long range interactions to the macroscopic contact angle.