Figure 4From: Blue shift of CdSe/ZnS nanocrystal-labels upon DNA-hybridizationTEM-micrograph of QD-oligonucleotides before (A) and after (B) hybridization process respectively. Both pictures are showing non-agglomerated QDs with a diameter of around 3 nm. Samples were prepared by immersion and subsequent drying of carbon-film covered copper grinds in aqueous dispersions of sample A and B.Back to article page