In low energy electron point source microscopy, a perforated foil with a
regular pattern is required in order to be able to resolve an object which
is suspended over a hole. An object can not be seen from the support in the
case of conventional hole carbon film. H.-W. Fink and C. Schönenberger
(Univ. of Basel) used Quantifoil hole carbon foils for the measurement of
electrical current through DNA molecules. For more information: Electrical
Conduction Through DNA Molecules, H.-W. Fink and C. Schönenberger,
Nature 398, 407-410 (1999).
A schematic representation of a LEEPS microscope with a manipulation tip
between specimen and detector.
A projection image of ropes of lambda DNA spanning a 2 µm hole.
Courtesy of Dr. H.-W. Fink.
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