研究目的
Investigating the synthesis of small-size CdS quantum dots (QDs) without the coexistence of the precursor compound (PC) and thus with enhanced particle yield.
研究成果
The study demonstrates that the addition of TOPO after the formation of the PC in the pre-nucleation stage facilitates the production of small-size CdS QDs with enhanced particle yield and without the coexistence of the PC. This provides a new approach to making small-size QDs and contributes to the understanding of non-classical nucleation theory.
研究不足
The study focuses on the synthesis of CdS QDs and the effect of TOPO on the fragmentation of the PC. The generalizability of the findings to other types of QDs or under different conditions is not explored.
1：Experimental Design and Method Selection:
The study involves the synthesis of CdS QDs using cadmium oleate (Cd(OA)2) and sulfur (S) in 1-octadecene (ODE), with the addition of tri-n-octylphosphine oxide (TOPO) to facilitate the production of small-size QDs.
2：Sample Selection and Data Sources:
The reaction conditions were varied to study the formation of QDs and the effect of TOPO on the fragmentation of the PC.
3：List of Experimental Equipment and Materials:
Cadmium oleate (Cd(OA)2), sulfur (S), 1-octadecene (ODE), tri-n-octylphosphine oxide (TOPO).
4：Experimental Procedures and Operational Workflow:
The reaction was carried out at different temperatures, and samples were taken at various stages to analyze the formation of QDs and the effect of TOPO.
5：Data Analysis Methods:
Optical absorption spectra were collected to analyze the formation and properties of the QDs.
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