Figure 30.
Schematic representation of the sequential CE reactions through which CdSe|CdS NRs are transformed first into CdSe|CdS/Cu2-xS and then into CdSe|CdS/ZnS segment-like NHCs. The TEM images of the original CdSe|CdS (A) and the CdSe|CdS/ZnS (B) samples show that neither the length nor the diameter of the NRs have changed significantly during the sequential ion exchange steps. (C) STEM-HAADF image of several NRs from a sample which has undergone a 50% ion exchange, along with the corresponding EDX mapping (D) showing the spatial distribution of Zn and Cd. The distinct CdS and ZnS sections can be clearly detected. Reproduced from [Adel, P.; Wolf, A.; Kodanek, T.; Dorfs, D. Segmented CdSe@CdS/ZnS Nanorods Synthesized via a Partial Ion Exchange Sequence Chem. Mater. 2014, 26, 3121–3127]. Copyright 2014 American Chemical Society.