A process for producing at least one nanopore with a predetermined diameter for sequencing a biopolymer is provided herein. This process includes providing at least one electrode and at least two nanoparticles in an intervening space between the electrode and a delimiting component opposite to the electrode. The electrode is coated with an electrically conductive material with resultant mechanical fixing of the at least two nanoparticles in the intervening space, thus producing a fixed porous arrangement. Charging of the electrically conductive material and/or another electrically conductive material to the fixed porous arrangement permits the establishment of a predetermined diameter of at least one pore, such as the formation of the nanopore. A process for sequencing the biopolymer with the aid of a fixed porous arrangement, as well as a corresponding device, are also provided herein.