Nanomaterials @ Interfaces Research Group

HREM images of CdSe nanocrystals on a Au substrate were calculated for different relative shift of the Au and CdSe unitcells. The calculations proved that the added shift had significant influence on the images of the CdSe nanocrystals with thickness from 0.7 nm to 3.5 nm in the case of no tilt imaging condition. Experimental images exhibiting 1/3{422}Au and {10.0}CdSe patterns were simulated. A good fit between the experimental and calculated images were obtained in the tilted condition where the calculated images were very similar for different shifts. The thickness of the CdSe nanocrystals was estimated to be ca. 3 nm.