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Autor(en) / Beteiligte
Titel
Formation of ZnSe magic-size clusters displaying optical absorption doublets from prenucleation clusters
Ist Teil von
  • Nano research, 2024-07, Vol.17 (7), p.6741-6748
Ort / Verlag
Beijing: Tsinghua University Press
Erscheinungsjahr
2024
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
  • The formation pathway of colloidal semiconductor ZnSe magic-size clusters (MSCs) in a reaction that display an optical absorption doublet remains poorly understood. The reaction of Zn(OAc) 2 /OLA (made from zinc acetate and oleylamine) and tri- n -octylphosphine selenide (SeTOP) in OLA in the presence of diphenylphosphine (HPPh 2 ) is studied, in which dMSC-345 displays a doublet peaking at 328/345 nm. We suggest that the development is from the clusters that form in the initial prenucleation stage of the reaction. The clusters are the precursor compound (PC-299) of MSC-299 (displaying an absorption singlet peaking at 299 nm). PC-299 transforms to PC-345 at a later stage. The presence of alcohol (such as methanol or ethylene glycol) promotes another pathway, which is the PC-299 to PC-320 transformation. PC-320 transforms to dMSC-320 (with a doublet at 305/320 nm), followed by dMSC-345 via PC-345. The present study provides additional evidence that clusters (PC-299) form and transform (such as to dMSC-345 via PC-345) in the prenucleation stage of ZnSe quantum dots (QDs).
Sprache
Englisch
Identifikatoren
ISSN: 1998-0124
eISSN: 1998-0000
DOI: 10.1007/s12274-024-6627-0
Titel-ID: cdi_proquest_journals_3075492678

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