@article{Zhao2024, 
author = {Dingyu Zhao and Shasha Wang and Jiawei Xue and Chunchun Zhang and Shanling Wang and Xiaoqin Chen and Chaoran Luan and Kui Yu},
title = {Formation of ZnSe magic-size clusters displaying optical absorption doublets from prenucleation clusters},
year = {2024},
journal = {Nano Research},
volume = {17},
number = {7},
pages = {6741-6748},
keywords = {quantum dot (QD), magic-size cluster (MSC), prenucleation cluster, precursor compound (PC), zinc selenide (ZnSe)},
url = {https://www.sciopen.com/article/10.1007/s12274-024-6627-0},
doi = {10.1007/s12274-024-6627-0},
abstract = {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 (HPPh2) 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).}
}