Gallium Nitride Nanowires

Authored by: Catherine Stampfl , Damien J. Carter

Handbook of Nanophysics

Print publication date:  September  2010
Online publication date:  September  2010

Print ISBN: 9781420075427
eBook ISBN: 9781420075434
Adobe ISBN:


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Semiconductor nanostructures, which have one dimension of the order of 10−9 m, have attracted huge interest from the scientific community due to the unique quantum confinement effects that become important on this scale, and the resulting potential for size-tunable nanodevices (Cui and Lieber 2001; Duan et al. 2003). Such nanostructures include (1) quantum wells, e.g., a heterostructure or superlattice, which are two-dimensional structures and confined in one dimension; (2) quantum wires, a one-dimensional structure confined in two dimensions; and (3) quantum dots, a zero-dimensional structure confined in three dimensions. These systems are illustrated in Figure 18.1, as well as the three-dimensional bulk system. The terminology of “quantum” indicates that the electronic properties become quantized as the size of a dimension(s) of the structure diminishes, that is, they change from being continuous to discrete values, as depicted in the electronic density of states shown in Figure 18.1.

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