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Evolution of CdTe magic-size clusters with single absorption doublet assisted by adding small molecules during prenucleation

From National Research Council Canada

DOIResolve DOI: https://doi.org/10.1021/acs.jpclett.0c00258
AuthorSearch for: ; Search for: ; Search for: ORCID identifier: https://orcid.org/0000-0002-2852-2527; Search for: 1; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ORCID identifier: https://orcid.org/0000-0003-3812-9208; Search for: ORCID identifier: https://orcid.org/0000-0002-9772-9492; Search for: ORCID identifier: https://orcid.org/0000-0003-0349-2680; Search for: ORCID identifier: https://orcid.org/0000-0003-2942-4686
Affiliation
  1. National Research Council of Canada. Metrology Research Centre
FormatText, Article
Abstract
An approach is reported for the exclusive production of CdTe magic-size clusters (MSCs) that exhibit an optical absorption doublet peaking at 385/427 nm, with an explanation of the synthesis procedure. The MSCs, defined as dMSC-427, were produced from the reaction of cadmium oleate (Cd(OA)₂) and tri-n-octylphosphine telluride in octadecene at 100 °C, with the addition of acetic acid (HOAc) or acetate (M(OAc)₂) during the prenucleation stage (40 °C). Without such an addition or when it was performed in the postnucleation stage (100 °C), quantum dots (QDs) developed. The production of dMSC-427 or QDs is hypothesized to be related to the solubility of the Cd precursor, such as Cd(OA)₁(OAc)₁ or Cd(OA)₂, respectively. Also, the reactions that lead to Cd(OA)₁(OAc)₁ are proposed. The present study provides an in-depth understanding of the two-pathway model proposed for the prenucleation stage of binary colloidal QDs, as well as of the formation of MSCs and/or QDs.
Publication date
PublisherAmerican Chemical Society
In
  • The Journal of Physical Chemistry Letters 11, no. 6: 2230–2240.
LanguageEnglish
Peer reviewedYes
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Record identifierd049c973-7942-4b19-beac-b5fd42ff4c74
Record created2020-07-29
Record modified2023-09-12
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