Extremely extended platelets, about 1 in diameter, were formed by He ion implantation; followed by annealing (250 or 300C, 180 to 300s). The platelets were not extended on the most easily cleaved {110}-type planes but on {111}-type planes. The platelets gave rise to extra transmission electron diffraction spots. An analysis of the diffraction patterns, combined with electron microscopic data, showed that oppositely bent unreconstructed interior {111} surfaces were created.

T.Nomachi, S.Muto, M.Hirata, H.Kohno, J.Yamasaki, S.Takeda: Applied Physics Letters, 1997, 71[2], 255-7