The invention relates to a process for preparing nitroalkanes by reaction of at least one alkane with at least one nitrating agent in the gas phase, wherein the nitration is carried out in a microstructured reaction zone having parallel channels having hydraulic diameters of less than 2. Fins extend between and are in thermal conducting relation with adjacent ones of the runs and an inlet manifold is located on one end of the tubes with an outlet manifold located on the other. In addition to their antiseptic power, ICIC’s showed better skin biocompatibility than povidone iodine and effectively promoted wound healing. The two electrodes connect with the dielectric layer by the holes.