| http://www.w3.org/ns/prov#value | - The particles used to create the CCA can be any particle selected from among colloidal polystyrenes, polymethylmethacrylates, silicon dioxides, aluminum oxides, polytetrafluoroethylenes and any other suitable materials which are generally uniform in size, surface charge and show no absorption or diffraction in the spectral regions needed for photoswitching.
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