Collecting structural metadata involves various techniques and tools, including: - Microscopy: Techniques like Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM) provide detailed images of nanostructures. - Spectroscopy: Methods such as Raman spectroscopy and X-ray diffraction (XRD) offer insights into the composition and arrangement of materials. - Computational Modeling: Simulations and models help predict and describe the structure of nanomaterials.