Properties of Nanomaterials Quiz

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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?

They increase conductivity Signup and view all the answers

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

Nanomaterial size Signup and view all the answers

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

Yield strength Signup and view all the answers

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

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

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

Electron microscopy Signup and view all the answers

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

Brunauer–Emmett–Teller (BET) analysis Signup and view all the answers

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

Surface area-to-volume ratio Signup and view all the answers

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

Measuring surface charges and dispersion stability Signup and view all the answers

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

Particle size Signup and view all the answers

What is the fundamental defining attribute of all nanoparticles?

Must have a nanoscale dimension Signup and view all the answers

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

Representing length scale from 1 to 100 nm Signup and view all the answers

What is the size range for materials classified as nanomaterials?

1 - 100 nm Signup and view all the answers

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

Indicating small dimensions Signup and view all the answers

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

Spherical surface area Signup and view all the answers

What is the nanometer equivalent to in meters?

A billionth of a meter Signup and view all the answers