  Scanning probe microscopes scan and manipulate a sharp tip in the immediate
vicinity of a sample surface. The limited bandwidth of the feedback mechanism
used for stabilizing the separation between the tip and the sample makes the
fragile nanoscopic tip very susceptible to mechanical instabilities. We
propose, demonstrate and characterize a new alternative device based on bulging
a thin substrate against a second substrate and rolling them with respect each
other. We showcase the power of this method by placing gold nanoparticles and
semiconductor quantum dots on the two opposite substrates and positioning them
with nanometer precision to enhance the fluorescence intensity and emission
rate. We exhibit the passive mechanical stability of the system over more than
one hour. The design concept presented in this work holds promise in a variety
of other contexts, where nanoscopic features have to be positioned and kept
near contact with each other.
