  Forces induced by quantum fluctuations of electromagnetic field control
adhesion phenomena between rough solids when the bodies are separated by
distances ~10nm. However, this distance range remains largely unexplored
experimentally in contrast with the shorter (van der Waals forces) or the
longer (Casimir forces) separations. The reason for this is the pull-in
instability of the systems with the elastic suspension that poses a formidable
limitation. In this paper we propose a genuine experimental configuration that
does not suffer from the short distance instability. The method is based on
adhered cantilever, whose shape is sensitive to the forces acting near the
adhered end. The general principle of the method, its possible realization and
feasibility are extensively discussed. The dimensions of the cantilever are
determined by the maximum sensitivity to the forces. If the adhesion is defined
by strong capillary or chemical interactions, the method loses its sensitivity.
Special discussion is presented for the determination of the minimum distance
between the rough solids upon contact, and for the compensation of the residual
electrostatic contribution. The proposed method can be applied to any kind of
solids (metals, semiconductors, dielectrics) and to any intervening medium (gas
or liquid).
