tion in affected monolayer regions, as the enhanced aliquid-likeo character of debonded tails would give rise to an enhanced viscous drag opposing the motion of the tip.  Attempts to remove from the surface monolayer molecules (following inscription of patterns in the non-destructive patterning regime) by solvent treatments with sonication and Scotch-tape peeling failed, while exposure to solutions of OTS or NTS invariably resulted in the rapid self-assembly of a stable overlayer in the tip-inscribed areas. Whether the siloxane bonds are or are not affected under such conditions cannot thus be conclusively decided at this stage, the patterned monolayer displaying remarkable stability in all subsequent self-assembly and chemical modification operations.  a) R. Maoz, H. Cohen, J. Sagiv, Langmuir 1998, 14, 5988. b) C. A. Jones, M. C. Petty, G. G. Roberts, G. Davies, J. Yarwood, N. M. Ratcliffe, J. W. Barton, Thin Solid Films 1987, 155, 187.  For clarity, the ocatadecylamine contributions to the -CH2and -CH3 bands around 2900 cm [11a] were omitted in Figure 3.  Due to the hydrophobic and oleophobic character of the monolayer surface, the sample emerged completely dry and free of traces of bulk liquid contamination from both the acid and ocatadecylamine solutions.  F. Forouzan, A. J. Bard, J. Phys. Chem. B 1997, 101, 10 876.  H. Shiku, I. Uchida, T. Matsue, Langmuir 1997, 13, 7239.  Because of the convolution with the tip, the measured lateral dimensions of the particles may be overestimated. AFM images (taken with a sharp tip) of CdS generated by the same process (1 ́ CdS deposition) on a laterally unrestricted TFSM surface reveal particles with heights between 0.5 and 1.5 nm and lateral dimensions between 3 and 8 nm [6c].