Nanoparticles Lecture Notes

These flashcards cover key concepts and terms related to nanoparticles, their properties, uses, and safety concerns.

Nanoparticles

Particles that are 1-100 nanometers across, containing a few hundred atoms.

PM2.5

Fine particles with diameters between 100 and 2500 nm.

Coarse particles (PM10)

Particles with diameters between 1 x 10^-5 m and 2.5 x 10^-6 m, often referred to as dust.

Surface area to volume ratio

A property that increases by a factor of 10 as the side of a cube decreases by a factor of 10.

Fullerenes

A type of nanoparticle with different properties compared to bulk carbon due to high surface area.

Catalysts

Substances that have a high surface area to volume ratio, making them effective in speeding up chemical reactions.

Highly selective sensors

Devices that can be produced using nanoparticles due to their unique properties.

Nanotubes

Structures that can make stronger, lighter building materials and conduct electricity.

Nanoparticle uses in cosmetics

In products like sun tan cream and deodorant, nanoparticles help avoid white marks.

Lubricant coatings

Coatings made from nanoparticles that reduce friction, useful in artificial joints and gears.

Toxicity concerns

Potential harmful effects of nanoparticles, including their ability to enter the brain from the bloodstream.