Technology for Obtaining Polymer Nanomaterials Quiz
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Questions and Answers

Which method of obtaining nanoparticles is considered a bottom-up approach?

  • Biological methods
  • Molding
  • Chemical methods (correct)
  • Physical methods
  • What are molecular brushes and star polymers used for in the synthesis of nanoparticles?

  • To provide color to the nanoparticles
  • To reduce the stability of nanoparticles
  • To act as nanoreactors for synthesis of nanoparticles (correct)
  • To increase the size of nanoparticles
  • Which type of materials are block copolymers and Janus particles associated with?

  • Composite materials
  • Metallic materials
  • Ceramic materials
  • Polymeric materials (correct)
  • What are the parameters that affect the high energy ball milling process?

    <p>Milling speed and type of milling</p> Signup and view all the answers

    Which method involves vaporization of the material from a solid source and transportation to the substrate, followed by nucleation and growth to form a thin film?

    <p>Chemical vapor deposition</p> Signup and view all the answers

    In the context of ZnO nanoparticles as antibacterial material, what does the variation in content of PbO, Te, and PbTe phases at different milling times indicate?

    <p>Change in chemical composition</p> Signup and view all the answers

    When considering the formation of ternary metallic-dielectric multicore-shell nanoparticles, which method is used?

    <p>Inert gas condensation</p> Signup and view all the answers

    What is the main principle behind the sol-gel method?

    <p>Using chemical precursors to produce an inorganic network</p> Signup and view all the answers

    Which parameter is crucial in determining the size of nanoparticles in the inert gas condensation method?

    <p>Milling atmosphere</p> Signup and view all the answers

    What is the primary focus of the top-down (physical methods) approach in nanomaterial synthesis?

    <p>:Reducing macroscopic material to nanomaterial</p> Signup and view all the answers

    Which method involves the vaporization of the material from a solid source and transportation to the substrate, followed by nucleation and growth to form a thin film?

    <p>Chemical vapor deposition</p> Signup and view all the answers

    What is the key principle behind the sol-gel method?

    <p>Formation of nanoparticles from atomic or molecular clusters</p> Signup and view all the answers

    In the context of nanomaterial synthesis, what is the primary focus of the bottom-up (chemical methods) approach?

    <p>Synthesis of nanoparticles from atomic or molecular clusters</p> Signup and view all the answers

    What is the specific process involved in high energy ball milling?

    <p>Mechanical alloying and fracturing of particles</p> Signup and view all the answers

    Which method is associated with growing MoTe2 films through tellurization of the Mo film?

    <p>Chemical vapor deposition</p> Signup and view all the answers

    In nanomaterial synthesis, what characterizes top-down (physical methods) approach?

    <p>Transformation of macroscopic materials to nanomaterials</p> Signup and view all the answers

    What are the key parameters for the controlled oxidation of iron nanoparticles in chemical vapour synthesis?

    <p>High temperatures, high precursor concentration, long condensation times</p> Signup and view all the answers

    What is the precursor used for the production of iron oxide nanoparticle aggregates at 1,200 °C?

    <p>Iron pentacarbonyl Fe(CO)5</p> Signup and view all the answers

    What temperature contour is required in the controlled oxidation of iron nanoparticles in chemical vapour synthesis when the O2/Fe molar ratio is between 1.6 and 3.2?

    <p>High temperature contour</p> Signup and view all the answers

    What does the number size distribution of the iron oxide nanoparticle aggregates indicate at 1,200 °C in 0.1 vol% oxygen atmosphere?

    <p>Presence of magnetite only</p> Signup and view all the answers

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