Non-destructive Evaluations of Gallium Nitride Nanowires

We have calculated the second and third order elastic constants of GaN nanowires at room temperature validating the interaction potential model. The ultrasonic attenuation and velocity in the nanowires are determined using the non-linear elastic constants for different diameters (97 nm -160 nm) of the wires at the nanoscale. Where possible, the results are compared with the experiments. Finally we established the correlation between the size dependent thermal conductivity and the ultrasonic attenuation of the nanowires.