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None of the following follows from quantum confinement except

  • A.the size dependence of a quantum dot's emission colour
  • B.the depression of a nanoparticle's melting point
  • C.the plasmon absorption of a gold colloid
  • D.the agglomeration of an uncapped colloid

Answer: A

Confining the carriers discretises and raises their energy levels, so the band gap and hence the emitted colour depend on size. Melting point depression, plasmon absorption and agglomeration all arise from surface effects instead.

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