Figure 1.

The four-state model for electronic transitions in a hollow nanosphere. E10 and E11 are occupied states, and E20 and E21 are unoccupied states. EF is the Fermi energy. Here, we consider the electronic states in the case of m = 0. The possible transition channels are indicated.

Xiao et al. Nanoscale Research Letters 2012 7:578   doi:10.1186/1556-276X-7-578
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