Nanoparticle Surface Charge
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Questions and Answers

What is the primary technique used to measure the surface charge of nanoparticles?

  • Contact angle measurement
  • Hydrophobic interaction chromatography (HIC)
  • Zeta potential (correct)
  • Octanol–water partitioning

What determines the extent to which a nanomaterial can be dispersed in a medium?

  • Ligand shell composition
  • Hydrophobicity of the nanomaterial surface (correct)
  • Surface charge density
  • Electrical double layer (EDL) thickness

What is the result of highly positively- or negatively charged particles in an aqueous environment?

  • Neutral colloidal dispersions
  • Stable colloidal dispersions (correct)
  • Unstable colloidal dispersions
  • Aggregated colloidal dispersions

What is the purpose of measuring the surface charge density of nanoparticles?

<p>To determine the colloidal stability of nanoparticles (D)</p> Signup and view all the answers

How can the surface charge density of nanoparticles change?

<p>Through changes in either the external environment or interactions with biomolecules (B)</p> Signup and view all the answers

What is the term for the layer that forms around nanoparticles in an aqueous environment, leading to stable colloidal dispersions?

<p>Electrical double layer (EDL) (C)</p> Signup and view all the answers

What is the role of hydrophobicity in the biological milieu?

<p>It affects the composition of the protein corona (B)</p> Signup and view all the answers

What method is used to measure the hydrophobicity of nanomaterials?

<p>Contact angle measurement (D)</p> Signup and view all the answers

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