(i) Schematic drawing of an x-ray single-molecular detection
system for individual DNA molecules in aqueous solutions (not to scale).
Diffracted X-Ray Tracking (DXT) traces the displacement of the single
diffracted x-ray spot from the one-dimensional Si/Mo nanocrystal, which
is linked to the individual DNA molecule. The diameters of the nanocrystal
and the DNA molecule are about 30 nm and 2.5 nm, respectively.
(ii) Schematic drawing of the sample of physically adsorbed Si/Mo nanocrystals
on gold(Au)/quartz.
(iii) Diffraction spots cannot be monitored when the direction of the
stacking period of the Si/Mo multilayer is parallel to the surface of
the Au/quartz.
Reported by: Sasaki
et al., Physical Review Letters, 10 December 2001..
Associated
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