C3- Structure And Bonding Flashcards
What is nanoscience?
The science of really small things and the structures that are 1-100nm in size.
What are course particles?
They have a diameter between 2500nm and 10000nm. These are called dust.
What are fine particles?
They have a diameter between 100nm and 2500nm.
What are nanoparticles?
They have a diameter between 1nm and 100nm and are particles that contain only a few hundred atoms.
What is good about nanoparticles?
They have a high surface area to volume ratio. This means you would need less of a material thats made up of nanoparticles to work as a catalyst compared to a material made of normal sized particles.
What are the advantages of nanoparticles?
They have a large surface area meaning they can make new catalysts.
Nanomedicine is where tiny particles are absorbed more easily by the body than other particles. They can then deliver drugs right to the cells that are needed.
Some conduct electricity so can be used for electric circuits for computer chips.
Some have antibacterial properties so can be added to make surgical masks and wound dressings and even deodorants.
The are also being used to improve moisturisers without making them oily.
They are also highly reactive and can be used for industry as a sustainable resource.
What are the disadvantages of nanoparticles?
The way they affect the body isn’t fully understood so needed to be tested to minimise the risks.
We don’t yet know what the long-term impacts of health will be.
Consumers are choosing whether or not to use them as we do not know the long-term affects.
