Despite the advances in fabrication techniques, achieving perfect homogeneity remains a challenge due to several factors:
Scale: At the nanoscale, even minor variations can have significant impacts on material properties. Contamination: Impurities and contaminants can introduce heterogeneity, affecting the overall performance of the material. Complexity: Some nanomaterials, such as nanocomposites, have inherently complex structures, making uniformity difficult to achieve.