A spraying device for use in spraying a material comprising an anode and a coating chamber containing a cathode and a substrate to be coated with the spray material, wherein the anode (10) defines a container It is having an inner body (12) electrically conductive, an outer body, an anode cavity within the inner electrically conductive body and an opening (14) at one end of the inner electrically conductive body to communicate with the coating chamber to allow particles loaded to flow between the inner electrically conductive body and the cathode in the coating chamber, and wherein the internal electrically conductive body is coupled to a voltage source to provide a voltage difference between the spray material and the inner conductive body; and wherein the opening is substantially smaller than a circumference of the container and is sized to prevent essentially the coating material is deposited in the container.
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