Nanoparticles Flashcards
Bonding, Structure, and Properties of Matter (11 cards)
What are coarse particles (PMn) and their diameter range?
Coarse particles (PMn) have a diameter between 2500 nm and 10,000 nm
Coarse particles are also referred to as dust.
What is the diameter range of fine particles (PM2g)?
fine particles (PM2g) have a diameter between 100 nm and 2500 nm
This category includes particles larger than nanoparticles but smaller than coarse particles.
Define nanoparticles and their diameter range.
Nanoparticles have a diameter between 1 nm and 100 nm
These particles typically contain only a few hundred atoms.
What is the field of science that investigates the uses and properties of nanoparticles?
The field is called nanoscience.
What is the significance of the surface area to volume ratio in nanoparticles?
The surface area to volume ratio affects the way that a particle behaves.
How does the surface area to volume ratio change as particles decrease in size?
As particles decrease in size, the surface area increases in relation to their volume, causing the ratio to increase.
Calculate the surface area to volume ratio of a cube with sides of length 100 nm.
Surface area to volume ratio = 0.06 nm⁻¹
Total surface area = 60000 nm², Volume = 1000000 nm³.
What is the surface area of a cube with sides of length 10 nm?
The surface area is 600 nm²
Each face has a surface area of 100 nm².
What is the volume of a cube with sides of length 10 nm?
The volume is 1000 nm³.
What is the surface area to volume ratio of a cube with sides of length 10 nm?
Surface area to volume ratio = 0.6 nm⁻¹.
Why do nanoparticles have different properties compared to bulk materials?
Nanoparticles have a very high surface area to volume ratio, affecting their properties and effectiveness, such as being more efficient catalysts.
