A quantum dot is composed of CdS, with a density of 4820 kg/m3. (a) Find the number of atoms in a spherical quantum dot of radius 2.50 nm. (b) Model the energy levels of a quantum dot as a one-dimensional inﬁ nite potential well of 2.0-nm width. What is the lowest energy level in this well? (c) What is the “band gap” between the n= 5 and n = 6 levels?

A quantum dot is composed of CdS, with a density of 4820 kg/m3. (a) Find the number of atoms in a spherical quantum dot of radius 2.50 nm. (b) Model the energy levels of a quantum dot as a one-dimensional inﬁ nite potential well of 2.0-nm width. What is the lowest energy level in this well? (c) What is the “band gap” between the n= 5 and n = 6 levels?

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Question

A quantum dot is composed of CdS, with a density of 4820 kg/m³.

(a) Find the number of atoms in a spherical quantum dot of radius 2.50 nm. (b) Model the energy levels of a quantum dot as a one-dimensional inﬁ nite potential well of 2.0-nm width. What is the lowest energy level in this well?

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