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In nanoimprint lithography, a mold made of a hard material such as metal or silicon is pressed into a softer material, often molten silicon itself or a polymer.
The Harvard scientists accomplished the trick by first building a mold made of silicon, using traditional photolithography methods to carve out the pattern.
A sand mold, made of special sand held together by a binder, is built up around a rigid positive, usually in a number of sections held together in metal boxes.
To copy nanopatterns as "replicates", NiP was electrolessly deposited on a nanopatterned master mold (made of SiO2/Si), whose surface was modified with 3-[2- 2-aminoethylamino)ethylamino]propyltrimethoxysilane (TAS).
In this study, an elastomeric mold made of poly(dimethylsiloxane) (PDMS), containing relief patterns placed in intimate contact with a silicon substrate, is utilized to create a continuous network of rectangular micro-channels for the motion of water fluid.
There's a scene in that film in which Steven Dorff — playing an actor sentenced to spend eternity bored in the Chateau Marmont — has a rubber mold made of his head, and he has to sit for what feels like an hour of screen time all gooped up in a metaphor for the way celebrity mummifies the living.
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For some high-precision applications, iron is cast into permanent molds made of either cast iron or graphite.
Silicon is brittle, and molds made of the material fail after about a hundred uses, says Schroers.
They agreed to have molds made of their faces — which involved light greasing and hot wax — for their 1971 album "Byrdmaniax".
From the 16th century, when pewter ware began to be decorated with relief work, molds made of brass or copper were used instead.
For heavy castings, molds made of coarse loam sand backed up with brick and faced with highly refractory material are used.
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