30.0 pM Data type 2 range Height 19.4 nM Sample 2 Etched 18 16 14 12 10 E 8 6 4 2 0 -2 microns b) Figure 16. AFM image and line scan plot of sample 2 etched in chlorine/argon plasma. a) This is an AFM image of sample 2 etched in chlorine/argon plasma. The line drawn on the image represents the location of a line scan. b) The plot shown represents the change in height of the sample surface as the AFM tip scans the line drawn on the AFM image in Figure 16a of sample 2 etched. Note the roughness of the surface, particularly that of the gold star which appears more rough than the gallium arsenide surface. 0 0