3D structures refer to the three-dimensional arrangement of atoms or molecules within a material or system. This research area involves the study and characterization of the spatial organization of these structures, often using techniques such as X-ray crystallography, electron microscopy, and computational modeling. Understanding 3D structures is crucial for predicting the properties and behavior of materials, as well as designing new materials with specific functions and applications. Researchers in this field may explore a wide range of materials, including proteins, polymers, crystals, and nanomaterials, to uncover the relationship between their structure and properties.