Final answer:
Aqueous nanoparticle suspensions behave as colloidal systems, with stable dispersion and possible interaction with cells.
Step-by-step explanation:
Aqueous nanoparticle suspensions behave as colloidal systems. Colloidal systems are heterogeneous mixtures in which solid particles or aggregates disperse in a liquid medium, such as water. These particles are already of colloidal size and can be produced by the dispersion of solid substances, like gelatin, glue, starch, and dehydrated milk powder, in water. The particles in an aqueous nanoparticle suspension do not settle out and remain dispersed indefinitely due to their stable nature.
One important aspect of nanoparticle suspensions is their surface charge. Positively charged nanoparticles are more likely to interact and accumulate at tumor tissues, as studies in animal models have shown. This interaction between positively charged nanoparticles and tumor cells affects their association and internalization, potentially enhancing the delivery of nanoparticles for medical applications.
Overall, aqueous nanoparticle suspensions behave as colloidal systems, with stable dispersion and possible interaction with cells.