Presentation Quiz

[Intercalation] What is the primary purpose of integrating reduced polyoxovanadates (POVs) with ZnAl layered double hydroxide (LDH) nanosheets?

• To enhance the material's conductivity

• To increase the light absorption range and facilitate nitrogen photofixation

• To improve the thermal stability of the material

• To enhance the hydrogen storage capacity

[Intercalation] What is the main advantage of the nitrogen photofixation process discussed in the paper compared to the Haber-Bosch process?

• It operates at ambient conditions, requiring less energy input

  
  

• It is a faster process

• It produces no byproducts

• It requires expensive raw materials

[Intercalation] Which characteristic of V34/0.5%-ZnAl was observed to contribute to its superior nitrogen photofixation performance?

• Low thermal stability

• 
  High cycling stability

• A high concentration of impurities

• Limited light absorption

[Photochemical] UV is used to generate which radical according to the paper and why is it important?

• OH radicals and UV allow reaction to proceed at lower temperature

• OH radicals and UV allow reaction to proceed at higher temperature

[Photochemical] What are the properties of the material obtained from the process and which application are they suitable for?

• Ferroelectric/Piezoelectric

• Ferroelectric/Ferromagnetic

• Ferromagnetic/Piezoelectric

[Photochemical] What is the purpose of UV irradiation in the ozone atmosphere in the 3rd step?

• 
  to generate OH radical

• to remove by-product and to obtain more dense structure and minimize defect

[High pressure] Which scattering effect occur at high temperature?

• Electron-electron scattering

• Electron-phonon scattering

• Phonon-phonon scattering

[High pressure] Which scattering process limits the thermal conductivity in three-phonon scattering?

• Normal process (N)

• Reverse process (R)

• Umklapp process (U)

[High pressure] How does grain size affect the thermal conductivity of θ-TaN?

• Smaller grain = increase thermal conductivity

• Larger grain = increase thermal conductivity

• Grain size has no effect

[CVD] Why do we need the 2-step precursors injection CVD synthesis for the deposition of coatings onto the substrate surface?

• due to increase in m.p., which can degrade one of the precursor

• As the gas injector can only inject one precursor at a time

• Precursors can react with each other and enhance the deposition rates

• All of the above :D