14 research outputs found
Influence of the Component Excipients on the Quality and Functionality of a Transdermal Film Formulation
Comparison of Rheology and Morphology of Medicinal Creams or Ointments for External Application
Aqueous solutions of hydroxypropyl cellulose, Tween 80 and their binary mixtures: Colloid-chemical aspects
Surface tension of lysozyme mixtures with dodecyltrimethylammonium bromide and sodium dodecylsulfate at water/air and water/octane interfaces
Non-Ostwald Behavior of Disperse Systems in Evaporation and Crystallization of Droplets of Water–Organic Solutions
Association of hydrophilic derivatives of chlorophyll a in ethanol–water and ethanol–water–solubilizer systems
Superficial dopants allow growth of silicone nanofilaments on hydroxyl-free substrates
We report new types of silicone nanostructures by a gas-phase reaction of trichloromethylsilane: 1-D silicone nanofilaments with a raveled end and silicone nanoteeth. Filaments with a raveled end are obtained on poly(vinyl chloride), which is superficially doped with the detergent Span 20. Silicone nanoteeth grow on sodium chloride using dibutyl phthalate as superficial dopant. Without dopants, no structures are observed. The dopants are identified by mass spectroscopy and the silicone nanostructures are analyzed by infrared spectroscopy and energy-dispersive analysis of X-rays. The growth of silicone nanostructures on a hydrophobic substrate (poly(vinyl chloride)/Span 20) and a substrate free of hydroxyl groups (sodium chloride/dibutyl phthalate) questions the currently discussed mechanisms for the growth of 1-D silicone nanofilaments, which is discussed. We suggest superficial doping as an alternative pretreatment method to oxidizing activation and prove this principle by the successful coating of copper, which is superficially doped with Span 20