Uses Of Nanoparticles (chemistry Only) (GCSE Chemistry)

A batch of silica nanoparticles is prepared for use as a catalyst support. When exposed to water they aggregate and sink. Which chemical modification would best keep them dispersed in water?

A researcher designs gold nanoparticles coated with thiol groups to bind to a protein target. Which chemical bond is primarily responsible for attaching the thiol to the gold surface?

Which practice would most reduce the chemical hazards during production of metal nanoparticles in a laboratory?

Nanoparticles have a much larger surface area to volume ratio than the same mass of bulk material. How does this change most directly affect chemical reactivity?

Why might regulatory chemists require measurement of the dissolution (ion release) rate of metal nanoparticles rather than only total metal content?

In designing a nanoparticle sensor that changes colour when binding a molecule, which chemical concept is being exploited?

A metal oxide nanoparticle used for pollution removal works by adsorbing molecules on its surface. Which factor will most increase adsorption capacity?

A student chooses to use iron oxide nanoparticles to remove arsenic from drinking water by adsorption. Which chemical change would show the nanoparticles have become saturated and need replacement?

Which use of silver nanoparticles relies on their strong chemical activity at surfaces?

In sunscreen lotions, zinc oxide nanoparticles are used instead of bulk zinc oxide mainly because:

Why are nanoparticle drug carriers (e.g., liposomes, polymer nanoparticles) chemically useful for targeted medicine?