Afm is a top periodical. Afm, full name of AdvancedFunctionalMaterials, is a monthly magazine published by Wiley-VCHVerlag, and its publishing direction is "Engineering Technology-Materials Science: Synthesis". The concept of super-uniformity proposed in this paper and its systematic theory and experimental demonstration have important reference value and guiding significance for the development and application of nanocrystalline materials. A periodical is a periodical published in a specific period. Publications shall be published by periodical publishing units established according to law. Periodical publishing units must be approved by the General Administration of Press and Publication, hold a domestic unified serial publication number, and obtain a periodical publishing license.