Figure 4From: Friction-induced nanofabrication method to produce protrusive nanostructures on quartz Fabrication of various nanostructures on quartz surface. (a) nanodot created by line-scratch at F n = 6 μN, N = 100 and D = 80 nm, (b) surface mesa generated by scanning-scratch at F n = 6 μN and N = 4 and (c) nanoletters produced by a dull diamond tip with R = 500 nm at F n = 30 μN and N = 100.Back to article page