Nanotechnology Problem

6. Which is the most commonly used technique for the functionalization of carbon nanotubes? a. Centrifugation b. Ultrasonication c. Mechanical mixing d. Spin coating 7. Which characterization method provides information on the morphology of carbon nanotubes and other nanomaterials? a. Raman spectroscopy b. Thermogravimetric analysis c. Electron Microscopy d. X-ray diffraction 8. Which characteristic of CNTs affects most their toxicity? a. Length b. Diameter c. Catalytic metal particles d. Other carbon impurities 9. In one-dimensional nanomaterials a. one dimension is within the nanoscale b. one dimension is outside the nanoscale c. two dimensions are outside the nanoscale a. 10. Why are CNTs functionalized? For increasing the electrical resistivity of the final material b. For improving the CNTs dispersion in polymers or other materials c. For reducing the process time of the CNTs-based composites preparation d. For decreasing the cost of the final product