Figure 3.

Frequency tuning performance as a function of surface roughness of nanobeam. Observed in AFM image of surface morphology of Al-SiC. The surface roughness is a key parameter for the resonant frequency and tuning performance. The average roughness of the (a) R#1, (b) R#2, (c) R#3, and (d) R#4 samples varies from less than a nanometer to 30 nm.

Yoon et al. Nanoscale Research Letters 2013 8:270   doi:10.1186/1556-276X-8-270
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