Yusha Yang, Rui Huang, Yuqi Liu, Chunchun Zhang, Andrei V. Sapelkin, Xiaoqin Chen* and Kui Yu*,
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引用次数: 0
Abstract
The synthesis promise of prenucleation-stage samples of binary semiconductor quantum dots at room temperature (RT) remains largely unknown. Here we present the development of ternary CdTeSe magic-size clusters (MSCs) MSC-422 (displaying optical absorption peaking at 422 nm) at RT from mixtures of two prenucleation-stage samples of CdTe and CdSe in alcohol-containing toluene. The two samples were prepared at 130 or 140 °C from a reaction of cadmium acetate [Cd(OAc)2] and tri-n-octylphosphine chalcogenide (ETOP, E = Te, Se) in oleylamine, respectively. When CdTe was dispersed in the alcohol–toluene mixture, CdTe MSC-448 was seen; after CdSe addition, CdTeSe MSC-422 developed. To explain the result, we propose that the prenucleation cluster in CdTe transformed to CdTeSe MSC-422 via an intermediate stage involving the precursor compound (PC-448) of MSC-448 and PC-422. The PC-448 to PC-422 transformation was assisted by monomer substitution (rather than anion exchange). Our findings bring deeper insights into the synthesis power of PNCs that proceeds with number conservation of Cd–E bonds and pave the way to utilizing monomer substitution for MSC synthesis.
期刊介绍：
The journal Chemistry of Materials focuses on publishing original research at the intersection of materials science and chemistry. The studies published in the journal involve chemistry as a prominent component and explore topics such as the design, synthesis, characterization, processing, understanding, and application of functional or potentially functional materials. The journal covers various areas of interest, including inorganic and organic solid-state chemistry, nanomaterials, biomaterials, thin films and polymers, and composite/hybrid materials. The journal particularly seeks papers that highlight the creation or development of innovative materials with novel optical, electrical, magnetic, catalytic, or mechanical properties. It is essential that manuscripts on these topics have a primary focus on the chemistry of materials and represent a significant advancement compared to prior research. Before external reviews are sought, submitted manuscripts undergo a review process by a minimum of two editors to ensure their appropriateness for the journal and the presence of sufficient evidence of a significant advance that will be of broad interest to the materials chemistry community.
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