The copper plate must first be prepared with a "rocker" which roughens the surface.
Generally, the formation of these structures is assumed to be related to (and caused by) the interplay between ion erosion (which roughens the surface) and transport processes which induce a smoothing [9, 10, 12]; the latter could be effected by (beam-enhanced) surface diffusion [15, 16] or viscous flow [17, 18] within the ion penetration layer.
These observations have been explained in terms of the tendency for surface diffusion to generate sp2-rich surface clusters which roughen the surface, whereas high impingement energies lead to ion implantation, and hence less efficient surface diffusion, and to preferential sputter removal of protruding regions, which also favours low roughness.
Wind stress over the oceans generates ripples and small waves, which roughen the sea surface.
Mr. Clive's hand and wit are seen elsewhere in the rippled surfaces of the wings and bodies, which look roughened by the wind.
The texture of PAA (Fig. 5a) is relatively flat and smooth, compared to that of HQ-PAA (Fig. 5b, c) which shows roughened surfaces filled with needles.
The copper originates from the copper base layer underneath, which was chemically roughened in a copper micro-etching step, for example, through a mixture of sulfuric acid and hydrogen peroxide before solder mask application.
The latter corresponds to a simplified version of the inviscid diffraction theory of Howe [1] in which a sand roughened wall is modeled by a distribution of rigid hemispherical bosses on a rigid plane.
Infection with NYSV produces light or grayish green, or yellow stripes or mottles on the upper two-thirds of the leaf, which may be roughened or twisted.
Within the platelet regime, there is a critical thickness at which surface roughening occurs.
Copper oxides are stable only in the pH range of 8 12 [52], but not in acidic solutions [Eqs. (16) and (17)] in which surface roughening can occur: Table 3 Effect of different concentrations of BPP_1 on the thermometric parameters of copper in 2.0 M HNO3 Conc.
