The 6,000-year-old Mehrgarh amulet isn’t much to look at—a somewhat misshapen copper wheel just under an inch in diameter, with six spokes projecting from a central hub. But the historical importance ...

Evonik Industries has purchased a controlling interest in Harris & Ford Silco, a Portland, Ore.-based manufacturer of colloidal and ultra-high-purity silica. The business, renamed Evonik Silco ...

Dipolar particles are fundamental building blocks in nature and technology, yet the effect of particle anisotropy is seldom explored. Here, we fabricate colloidal silica rods coated with a ...

Silicon oxides such as SiO 2 are the most abundant component of the earth’s crust. They can be found in nature in crystalline form and are industrially manufactured in many forms, including colloidal ...