DNAReax nano-porous ceramic film wafer fits on a 3 inch silicon wafer. Ideal for oligonucleotide support  testing or as a nano-template for nano-fabrication.  Through pore film. No chrome to interfere with fluorescence.  Enhancement of 100 X of fluorescence compared to inert glass.  Pore size is 60 nm  or 100 nm diameter, your choice, with local hexagonal packing (honeycomb) order and a maximum pore size variation of 10%. Filter thickness is 75 microns.  Edges heat sealed and free of micro-cracks.