Design and assembly of the MAGrahd reactor tray. (A) Flow diagram for the set-up of the MAGrahd device.(i) The upper tray plate of an Omni tray (Nunc) was cut into a rectangular shape (49 mm × 110 mm). (ii) The opening was fixed with a cover glass plate from the inside of the lid. (iii) The fabricated film was bound to the inner surface of the thin glass plate. (iv) All of the reagents were dispensed onto the grids of the super-hydrophobic film. (v) The upper tray was inverted and attached to the bottom reservoir tray. (B) Design of the master stamp for embossing an array of grids onto a sheet of super-hydrophobic film. (1) An aluminum master and (2) a silicone plate. (C) Schematic drawing of an array of grids on a super-hydrophobic film.