Smart Materials and Nano Materials Lecture
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Questions and Answers

What is the size range that nanotechnology generally deals with?

  • 1 meter or smaller
  • 100 nanometers or smaller (correct)
  • 100 micrometers or smaller
  • 100 millimeters or smaller

What is the equivalent of a nanometer in millimeters?

  • 1/10 mm
  • 1/100 mm
  • 1/1,000,000 mm (correct)
  • 1/1,000 mm

What is the diameter of the human hair in nanometers?

  • 800,000 nm
  • 800 nm
  • 80,000 nm (correct)
  • 8,000 nm

When did the development of nanotechnology and nanoscience start?

<p>Early 1980s (A)</p> Signup and view all the answers

What are one-dimensional Nanomaterials used for?

<p>Electronic device manufacture (D)</p> Signup and view all the answers

What was discovered in 1985 leading to the development of nanotechnology?

<p>Fullerenes (B)</p> Signup and view all the answers

What are the properties of carbon nanotubes (CNTs) as mentioned in the text?

<p>Very strong, flexible around their axis, and excellent conductor of electricity (C)</p> Signup and view all the answers

What is the defining size of nanoparticles according to the text?

<p>Less than 100 nm in diameter (A)</p> Signup and view all the answers

In which area can nanotechnology make a concrete contribution based on the information provided?

<p>Reducing the need for maintenance (C)</p> Signup and view all the answers

What is a property of materials reduced to the nanoscale as mentioned in the text?

<p>They exhibit very different properties compared to macroscale (C)</p> Signup and view all the answers

Which building materials incorporate nanotechnology according to the information provided?

<p>Self-cleaning windows (D)</p> Signup and view all the answers

What is the function of the outer skin of the structure as per the given information?

<p>Absorbs sunlight through an organic photovoltaic skin (B)</p> Signup and view all the answers

What are the applications of titanium dioxide and zinc oxide nanoparticles mentioned in the text?

<p>Reflecting UV light and chemical reactivity (C)</p> Signup and view all the answers

What is the main function of nanosensors as per the given information?

<p>Monitoring temperature, humidity, and toxins (A)</p> Signup and view all the answers

What is a characteristic of nanoparticles for most applications as stated in the text?

<p>They are usually fixed, attached to a surface or within a composite (C)</p> Signup and view all the answers

What can nanotechnology contribute to as a direct result based on the given information?

<p>Reducing CO2 emissions (B)</p> Signup and view all the answers

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