| http://www.w3.org/ns/prov#value | - ovides a three-dimensionally periodic material comprising carbon, whose surfaces or interfaces are inverse replicas of the surfaces of a sphere array, wherein the sphere diameter is from about 20 to about 100 ??m, and the carbon is a foam having an average pore diameter of from about 4 ??? to about 10 ???. [0031] The invention also provides a three-dimensionally periodic material comprising at lea
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