One‐Dimensional Assemblies of Co‐doped CdTe Nanoparticles in Aqueous Solution#

Abstract

One‐dimensional (1D) Co‐doped CdTe nanorods (NRs) and nanochain assemblies were prepared by spontaneous self‐organization of Co‐doped CdTe nanoparticles (NPs) in an aqueous solution. The effect of different growth conditions on the formation of 1D assemblies was studied. Formation of nanochains was accelerated by the addition of 50% dimethylsulfoxide to the aqueous growth solution. NRs were obtained by keeping the growth solution at low temperature (4 °C) for 4 days, followed by room‐temperature aging for another 4 days. X‐ray diffraction patterns of the Co‐doped CdTe NPs showed that the same crystal structure as the CdTe nanocrystals was retained, indicating no second phase formation for the Co ions. XPS and ICP‐AES data demonstrated successful incorporation of Co ion within CdTe NPs. The room‐temperature susceptibility values of Co‐doped NPs increased with the doping percentage of Co ions.