Nano-science And Nano-particles Flashcards
What are nanoparticles good for?
Nanoparticle’s high surface area to volume ratio make more reactive than materials with normal particle sizes.
What happens to make nanoparticles more reactive?
The exposure to a large percentage of atoms at surface of nanoparticles make them highly reactive compared to even powdered reactants.
What are some uses of nanoparticulate materials?
Glass coated with titanium oxide nanoparticles, sunshine triggers chemical reaction breaks down dirt on the window, when it rains water spreads evenly over surface of the glass washing off broken down dirt.
Titanium oxide and zinc oxide nanoparticles used in modern sunscreens, coat nanoparticles of metal oxide with coating of silica, thickness of silica adjustable at atomic level, coated nanoparticles more effective blocking sun’s ray than usual UV absorbers.
Cosmetics industry one of the biggest users of new tech, nanoparticles in face cream absorbed deeper into skin, also used in sun cream and deodorants.
What is an increasingly common application?
Use of silver nanoparticles for antimicrobial coatings. Many textiles, keyboards, wound dressings and biomedical devices contain coatings of silver nanoparticles, continuously release low level of silver ions protect against bacteria.
