Details

Autor(en) / Beteiligte

• Sperling, Marcel
• Velev, Orlin D.
• Gradzielski, Michael

Titel

Controlling the Shape of Evaporating Droplets by Ionic Strength: Formation of Highly Anisometric Silica Supraparticles

Ist Teil von

• Angewandte Chemie (International ed.), 2014-01, Vol.53 (2), p.586-590

Auflage

International ed. in English

Ort / Verlag

Weinheim: WILEY-VCH Verlag

Erscheinungsjahr

2014

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Anisometric silica supraparticles are produced by a simple process of evaporation of sessile droplets containing fumed silica deposited on a superhydrophobic substrate. The shape of the supraparticles is directly controlled by the salt (NaCl) concentration, becoming anisometric beyond a threshold concentration, as quantified by light microscopy. This process is easily extended to supraparticles containing further functional colloidal components. Getting out of shape: Anisometric SiO2 supraparticles are produced by the simple evaporation of a suspension of sessile droplets containing fumed silica deposited on a superhydrophobic substrate. Their shape is directly controlled by the initial NaCl concentration of the suspension. This process is easily extended to supraparticles containing further functional colloidal components.