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Atomic Force Microscopy (AFM) for Nanoparticle Analysis

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Atomic Force Microscopy (AFM) for Nanoparticle Analysis

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Questions and Answers

Why is controlling the ionic strength of the medium important for nanoparticle stability?

To increase the surface charge of nanoparticles.

To reduce the electrical double layer around nanoparticles.

To promote the aggregation of nanoparticles.

To maintain the colloidal stability of nanoparticles. (correct)

What is the effect of increased temperature on nanoparticles?

It enhances the thermal energy of nanoparticles, leading to faster Brownian motion and potential for increased collisions and aggregation. (correct)

It leads to slower Brownian motion and decreased collisions.

It has no effect on the thermal energy of nanoparticles.

It reduces the thermal energy of nanoparticles.

What happens to the electrostatic repulsion between nanoparticles in high ionic strength environments?

It decreases, promoting aggregation. (correct)

It increases, promoting stabilization.

It becomes zero, with no repulsion.

It remains unchanged, with no effect on stability.

Why is careful control of temperature necessary during nanoparticle synthesis?

To maintain the stability of nanoparticles. (D) Signup and view all the answers

What is the effect of high ionic strength on the electrical double layer around nanoparticles?

It compresses the electrical double layer, promoting destabilization. (A) Signup and view all the answers

What is the potential outcome of increased collisions and aggregation of nanoparticles?

Destabilization of nanoparticles. (C) Signup and view all the answers

What is the role of ions in the medium in relation to nanoparticle stability?

They screen the surface charge of nanoparticles, promoting aggregation. (C) Signup and view all the answers

What is the result of careful control of temperature and ionic strength during nanoparticle synthesis?

Maintained stability of nanoparticles. (C) Signup and view all the answers

What is the effect of increased Brownian motion on nanoparticle collisions?

It increases the frequency of collisions. (A) Signup and view all the answers

Why is it important to maintain the colloidal stability of nanoparticles?

To prevent destabilization and maintain nanoparticle functionality. (C) Signup and view all the answers