Suppression of lattice periods in vermiculite single crystal specimen supports for high resolution electron microscopy

Authors


  • Dedicated to the memory of Professor Dr Helmut Ruska who died 30 August 1973.

SUMMARY

Easy preparation of thin crystalline specimen supports for high resolution electron microscopy has been achieved by thermic exfoliation of vermiculite. The thinnest layers obtained appear to be 1·8 nm thick and show the expected hexagonal array with a 0·46 nm lattice spacing. This periodic background could be suppressed either by optical filtering or by putting a zero crossing of the respective transfer function of the electron microscope objective over the diffraction spots of the crystal.

Ancillary