The demand for sharp and stable tips suggests the use of carbon nanotubes a
s probing tips in scanning force microscopy. Here, we report a comparison o
f the long-range forces of conventional tips and nanotube tips, topographic
al images of various surfaces, such as Cu(lll), Si(111)7 X 7 and NaCl(100),
as well as images of a bundle of multiwalled nanotubes, which was deposite
d by severe tip crashing. It is found that the long-range forces of carbon
nanotube probing tips are reduced and that they are more resistant to wear
than conventional silicon tips (C) 2000 Elsevier Science B.V. All rights re
served.