Linear arrays of CaF2 nanostructures on Si

Linear arrays of CaF2 stripes and dots, about 7 nm wide, are fabricated by self-assembly on stepped Si(111). Stripes are grown on a CaF1 passivation layer, dots directly on Si. The stripes have a precision of +/-1 nm, are continuous, do not touch each other, and are attached to the top of the step edges. The stripe repulsion and their counter-intuitive attachment are explained via a reversal of the stacking at the CaF2/Si(111) interface. The dot density is 3X10(11) cm(-2)=2 Teradots/in.(2). These arrays may serve as masks in nanolithography. (C) 1999 American Institute of Physics. [S0003-6951(99)01115-8].