Flame Spray Pyrolysis
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Questions and Answers

What is the main purpose of the precursor spray in the described process?

  • To create large temperature gradients
  • To form metal vapors (correct)
  • To extinguish the flame
  • To collect nanoparticles on a filter

Which technological requirement is essential for the described process?

  • Use of gaseous feeds
  • Self-sustaining flame (correct)
  • Low temperature flames
  • High volatility precursors

What happens inside the flame during the process of precursor injection and spraying?

  • Combustion of metal species
  • Evaporation of metal atoms
  • Solvent condensation
  • Nucleation of metal atoms (correct)

What are the sequential steps involved in the fabrication of nanoparticles using this process?

<p>Evaporation, condensation, nucleation, growth (B)</p> Signup and view all the answers

What is the final product collected after the described process?

<p>Complex and functional NPs (B)</p> Signup and view all the answers

What is the primary form of the precursor in this combustion process?

<p>Liquid (C)</p> Signup and view all the answers

What is the main purpose of injecting the liquid precursor through a capillary and spraying it into a flame?

<p>To aggregate metal atoms into nanoparticles (A)</p> Signup and view all the answers

What is the essential requirement for the combustion process described?

<p>High temperature flames and large temperature gradients (D)</p> Signup and view all the answers

Which sequential step is NOT involved in the fabrication of nanoparticles using this process?

<p>Reduction by electrolysis (D)</p> Signup and view all the answers

What is the collected product after the combustion process described?

<p>Nanoparticles (D)</p> Signup and view all the answers

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