Properties of Nanomaterials Quiz
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Questions and Answers

What determines whether carbon nanotubes are conductors or semiconductors?

  • Their nanostructure (correct)
  • Their stability to elements
  • Their chemical properties
  • Their mechanical properties
  • In nanomaterials, what plays a role in determining their applications?

  • Reactivity with the target and stability (correct)
  • Mechanical properties like elasticity
  • Flammability and corrosiveness
  • Their catalytic properties
  • What property increases in nanomaterials compared to bulk materials due to grain size reduction?

  • Ductility
  • Tensile strength
  • Flexibility
  • Hardness (correct)
  • How do the number of electron wave modes contribute to the electrical conductivity of nanotubes?

    <p>They increase conductivity</p> Signup and view all the answers

    What is a key factor that enhances the catalytic properties of nanomaterials compared to their bulk analogues?

    <p>Nanomaterial size</p> Signup and view all the answers

    Which property of nanomaterials increases with decreasing grain size, improving their strength and hardness?

    <p>Yield strength</p> Signup and view all the answers

    What factors contribute to the significant difference in properties between nanometer-scale materials, atoms, and bulk materials?

    <p>Surface charge/interaction, crystallography, composition, and nanoscale size effects</p> Signup and view all the answers

    Which technique is commonly used to measure the size and distribution of nanoparticles?

    <p>Electron microscopy</p> Signup and view all the answers

    What is the most commonly used method to measure the surface area of a nanoparticle?

    <p>Brunauer–Emmett–Teller (BET) analysis</p> Signup and view all the answers

    Which factor has a significant impact on the performance and properties of a nanoparticle?

    <p>Surface area-to-volume ratio</p> Signup and view all the answers

    What is a common application of a zeta potentiometer in nanomaterials?

    <p>Measuring surface charges and dispersion stability</p> Signup and view all the answers

    Which property is directly related to the purity and performance of nanoparticles?

    <p>Particle size</p> Signup and view all the answers

    What is the fundamental defining attribute of all nanoparticles?

    <p>Must have a nanoscale dimension</p> Signup and view all the answers

    How is the prefix 'nano' defined in the text?

    <p>Representing length scale from 1 to 100 nm</p> Signup and view all the answers

    What is the size range for materials classified as nanomaterials?

    <p>1 - 100 nm</p> Signup and view all the answers

    What is the prefix 'nano' commonly used for in modern science?

    <p>Indicating small dimensions</p> Signup and view all the answers

    Which attribute must be greater than 60 for nanomaterials in terms of spherical surface area by volume?

    <p>Spherical surface area</p> Signup and view all the answers

    What is the nanometer equivalent to in meters?

    <p>A billionth of a meter</p> Signup and view all the answers

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