WANG Chunlei, YANG Bai, LI Dongmei, LI Minjie, HAN Kun, ZHANG Junhu. THE FIRST STEP OF PREPARING SUPPERLATTICE WITH AQUEOUS CdTe NANOCRYSTALS——THE CONTROLLED AGGREGATION OF NANOCRYSTALS[J]. Acta Polymerica Sinica, 2005,(4):594-599.
WANG Chunlei, YANG Bai, LI Dongmei, LI Minjie, HAN Kun, ZHANG Junhu. THE FIRST STEP OF PREPARING SUPPERLATTICE WITH AQUEOUS CdTe NANOCRYSTALS——THE CONTROLLED AGGREGATION OF NANOCRYSTALS[J]. Acta Polymerica Sinica, 2005,(4):594-599.DOI:
Water-soluble CdTe nanocrystals welag prepared in the presence of 3-mesaptopropionie acid (MPA).By adding additional Cd2+ or poly (acrylic-acid)(PAA) to the solution
aggregates of CdTe nanocrystals were obtained.and their size varied with the amount of Cd2+ or PAA.Cd2+ or PAA have an important effect on the aggregation process of CdTe.Additional Cd2+ can accelerate the formates of aggregates by linking with earboxyl on different CdTe particles
while PAA also acts as a linker between CdTe particles.When the freshly prepared nanocrystal salutions were stored for a long time
the interaction between the carboxyl and Cd2+ on different particles would lead to the formation of CdTe aggregation.The aggregation process was also a process of surface passivation which led to the dmmatical increase of photoluminecence intensity.These results showed that the size of the aggregates could be contmned by adjusting various conditions of aggregation.