47 - New Materials

Question 1

What are smart materials?

Answer 1

Materials which behave differently depending on conditions

Question 2

What is nitinol?

Answer 2

Shape memory alloy - goes back to remembered shape when heated

Question 3

What is a nanoparticle?

Answer 3

A particle 1-100nm

Question 4

How many atoms does a nanoparticle have?

Answer 4

A few hundred atoms

Question 5

What are fullerenes?

Answer 5

Hollow balls or closed tubes of carbon atoms arranged in hexagons

Question 6

What is a nanotube?

Answer 6

Lots of fullerenes joined together

Hollow carbon tubes

Very strong

Conduct electricity

Question 7

Why would nanoparticle be effective as catalysts?

Answer 7

Large surface area to volume ratio

Question 8

Why would nanoparticles be effective in sun cream or deordorant?

Answer 8

Wouldn’t leave white marks

Question 9

Why is nanomedicine significant?

Answer 9

Fullerenes are absorbed easily -> could deliver drugs directly to cells

Silver nanoparticles kill bacteria