Graphene particulates, especially graphene nanoribbons and graphene quantum dots, and a high-throughput process for the production of such particulates is provided. An inverter 11 inverts an input signal 101 and generates a first internal signal 104, and an inverter 12 inverts the first internal signal 104 and generates a second internal signal 105. The traps having a side, end, top and bottom panels constructed of a material that allows fluid flow therethrough. The disc shaped abutting portion is adapted to abut against the caulked portion and the shoulder portion.