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Questions and Answers
Which of the following statements about nanomaterials is true?
Which of the following statements about nanomaterials is true?
- They exhibit ferro-magnetic behavior.
- Their optical properties are not affected by quantum confinement.
- They can be used in spark plugs due to their low strength and corrosion resistance
- They have a higher melting point than bulk materials. (correct)
How can the mechanical properties of polymeric materials be improved?
How can the mechanical properties of polymeric materials be improved?
- By increasing the temperature of the material.
- By adding bulk fillers.
- By decreasing the size of the material.
- By adding nanofillers. (correct)
What is the use of nano-crystalline materials?
What is the use of nano-crystalline materials?
- Increased electrical conductivity.
- Increased thermal conductivity.
- Increased corrosion resistance
- Increased energy storage in batteries. (correct)
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Study Notes
- Melting point depression occurs in nanomaterials and they have a low melting point.
- Optical properties of nanomaterials are different from bulk materials due to quantum confinement and surface plasma resonance.
- Ferro-magnetic behavior disappears in nanomaterials and is transferred to super-paramagnetic.
- Mechanical properties of polymeric materials can be increased by adding nanofillers.
- Nanomaterials are used in spark plugs and micro drills due to their strength and corrosion resistance.
- Electrical conductivity can decrease or increase in nanomaterials.
- Nano-crystalline materials are used in batteries for increased energy storage.
- Chemical properties of nanoparticles may be different from bulk materials.
- Nanomaterials have low thermal conductivity.
- Materials behave differently at the nano-scale compared to larger scales.
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