A mechanism for pressing a nozzle 26 of an injection device 10 against a die 33, comprises a hooking device 12 which moves so that a hooking body 23 hooks or does not hook on a to-be-hooked portion 24; and a traction device 11 having, on its one end, the hooking device 12 and having, on its other end, the injection device 10. The modules allow for the controlled introduction of analyte-bearing fluid into SERS-active substrates. The optical fiber is mounted in the aperture of the stub. These fillers in the formulation, which when combined, have a synergistic effect that reduces the ablation rate significantly. Second bit lines are arranged in a trench between the first bit lines.