title: Synthesis of Half-Sphere/Half-Funnel-Shaped Silica Structures by Reagent Localization and the Role of Water in Shape Control.
abstract: Shape control of silica structures is demonstrated by localization of the reagents. A uniform dispersion of reagents provided straight silica rods, whereas localization of the reagents in the emulsion droplet periphery provided a new type of half-sphere/half-funnel structure. The effect of water concentration appeared to be related to the ease of diffusion of the silica precursor inside the emulsion droplet (i.e., the higher the water concentration, the lower the silica precursor diffusion).
authors: Nanosystems, Separations, and Materials Research Group, Energy and Transportation Science Division, Oak Ridge National Laboratory, 1 Bethel Valley Road, Oak Ridge, TN, 37831, USA.
authors: Panos
authors: P
authors: Datskos
authors: Nanosystems, Separations, and Materials Research Group, Energy and Transportation Science Division, Oak Ridge National Laboratory, 1 Bethel Valley Road, Oak Ridge, TN, 37831, USA.
authors: Georgios
authors: G
authors: Polizos
authors: Materials Science & Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA.
authors: David A
authors: DA
authors: Cullen
authors: Building Technologies Research & Integration Center (BTRIC), Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA.
authors: Mahabir
authors: M
authors: Bhandari
authors: Nanosystems, Separations, and Materials Research Group, Energy and Transportation Science Division, Oak Ridge National Laboratory, 1 Bethel Valley Road, Oak Ridge, TN, 37831, USA.
authors: Jaswinder
authors: J
authors: Sharma
keywords: colloidal; localization; rods; shape; silica