Figure 4.

Stiffness of silicon nanowire, kNW, with its diameter of 525 nm as a function of indentation force, F. It is shown that the relationship between kNW and F is well described by a scaling of kNW = αF1/3, where α is a constant parameter depending on nanowire geometry. It implies that nanoindentation of silicon nanowire is well described by classical elasticity theory such as Hertz theory

Sohn et al. Nanoscale Research Letters 2009 5:211-216   doi:10.1007/s11671-009-9467-7