Abstract
We have developed a colloidal crystal templating method for preparation of diamond filmswith 2D and 3D ordered porous structures. The technological process involved breaks downinto (a) impregnation into the pores of silica colloidal crystal (opal) films of detonationnanodiamond (DND) particles from their hydrosol; (b) microwave plasma-enhanced chemicalvapor deposition (MWPECVD) regrowth with diamond of pores with high DND filling; (c)Ar + ion dry etching of fragments of shells of coalesced diamond crystalliteswhich form in the course of MWPECVD on the surface of theSiO2 beads making up the outer surface of a film and (d) wet etching of theSiO2 template in aqueous HF solution. The final samples are either connected to the substrate orfree-standing films of various thicknesses having 2D or 3D ordered porous structures. Themorphology of the diamond films fabricated by this method replicates the pore network ofthe opal template. Raman measurements confirm the diamond structure of the synthesizedordered porous material.
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