Nanomaterials and Their Applications

Which of the following is a practical application of nanomaterials?

• Building larger airplanes and skyscrapers.

• Treating Type 1 diabetes by protecting insulin-producing cells.

• Observing cells with conventional microscopes.

• Creating materials with lower chemical reactivity.

What is the defining characteristic of a nanomaterial?

• It must be visible with a conventional microscope.

• It must have at least one dimension smaller than 100 micrometers.

• It must have at least one dimension smaller than 100 nanometers.

• It must be composed of only one type of atom.

Which tool is necessary to observe and manipulate individual atoms and molecules at the nanoscale?

• A conventional light microscope

• An electron microscope

• A scanning tunneling microscope

• A magnifying glass

How does breaking a material into smaller, nanoscale chunks affect its overall surface area and chemical reactivity?

• The overall surface area decreases, leading to slower reactions.

• The overall surface area increases, leading to faster reactions.

• The overall surface area remains the same, but reactivity increases.

• The overall surface area remains the same, and reactivity decreases.

What unique visual property can nanoscale gold exhibit?

• It always appears shiny yellow.

• It can appear red or purple.

• It becomes transparent.

• It glows in the dark.

What defines engineered nanomaterials?

• They are found naturally in volcanic ash.

• They are byproducts of combustion processes.

• They are designed and produced to help solve specific problems.

• They are only used in electronics.

How do nanomaterials contribute to advancements in electronics?

• They make electronic devices heavier.

• They are used to create larger circuit boards.

• They enable the creation of smaller and more efficient components like semiconductors.

• They are primarily used for aesthetic purposes in electronics.

What is a significant concern regarding the widespread use of nanomaterials?

• They are too expensive to produce for most applications.

• Their small size makes them difficult to store safely.

• There is a lack of complete understanding of their potential effects on the human body and environment.

• They are not strong enough for industrial applications.