The oblique angle Ar bombardment with a high current isotope separator and
ion implanter gives rise to nanoscale (400-900 nm) ripple formation on Si(1
0 0) at 80 and 100 keV for the dose of 10(18) ions/cm(2). The most importa
nt aspect of our preliminary investigation regarding the beam influencec on
ripple wavelength indicates that the meaningful data comparable to the the
oretical models can be obtained with homogeneous irradiation via beam sweep
ing. At 60 keV, Ar bombarded GaAs surface also shows nanoparticle decorated
ripples for the dose of 5 x 10(17) ions/cm(2) and at higher dose ripples w
ithout nanoparticles. (C) 2001 Elsevier Science B.V. All rights reserved.