Certain sample types are limited due to several factors:
1. Material Properties: Some materials do not possess the necessary physical or chemical properties for nanoscale applications. For example, the mechanical strength or thermal stability may be insufficient. 2. Compatibility: The sample must be compatible with the analytical techniques and instruments used in nanotechnology. 3. Purity and Quality: High levels of purity and consistency are required to ensure reliable results and reproducibility. 4. Cost and Availability: Some materials are either too expensive or not readily available in the required form or quantity.
