Nanoparticles Flashcards

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What is a nanoparticle?

A very small particle with a diameter between 1 nm and 100 nm (1 × 10^-9 m to 1 × 10^-7 m).

It means one billionth, or 10^-9.

1 nm is 1 × 10^-9 m.

They are bigger than most atoms and simple molecules but much smaller than bulk materials.

It increases; smaller particles have a higher ratio.

Because they have a very high surface area to volume ratio.

About 2.5 µm to 10 µm in diameter (2.5 × 10^-6 m to 1 × 10^-5 m).

About 100 nm to 2.5 µm in diameter (1 × 10^-7 m to 2.5 × 10^-6 m).

Use SA = 6a^2 and V = a^3; so SA:V = 6/a, where a is the side length.

1 µm is 1000 nm.