The magic-size nanocluster (CdSe)34 as a low-temperature nucleant for cadmium selenide nanocrystals; Room-temperature growth of crystalline quantum platelets

Yuanyuan Wang; Ying Zhang; Fudong Wang; Daryl E. Giblin; Jessica Hoy; Henry W. Rohrs; Richard A. Loomis; William E. Buhro

doi:10.1021/cm404068e

The magic-size nanocluster (CdSe)₃₄ as a low-temperature nucleant for cadmium selenide nanocrystals; Room-temperature growth of crystalline quantum platelets

Yuanyuan Wang
, Ying Zhang
, Fudong Wang
, Daryl E. Giblin
, Jessica Hoy
, Henry W. Rohrs
, Richard A. Loomis
, William E. Buhro

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

136 Scopus citations

Abstract

Reaction of Cd(OAc)₂·2H₂O and selenourea in primary-amine/secondary-amine cosolvent mixtures affords crystalline CdSe quantum platelets at room temperature. Their crystallinity is established by X-ray diffraction analysis (XRD), high-resolution transmission electron microscopy (TEM), and their sharp extinction and photoluminescence spectra. Reaction monitoring establishes the magic-size nanocluster (CdSe)₃₄ to be a key intermediate in the growth process, which converts to CdSe quantum platelets by first-order kinetics with no induction period. The results are interpreted to indicate that the critical crystal-nucleus size for CdSe under these conditions is in the range of (CdSe)₃₄ to (CdSe)₆₈. The nanocluster is obtained in isolated form as [(CdSe)₃₄(n- octylamine)₁₆(di-n-pentylamine)₂], which is proposed to function as crystal nuclei that may be stored in a bottle.

Original language	English
Pages (from-to)	2233-2243
Number of pages	11
Journal	Chemistry of Materials
Volume	26
Issue number	7
DOIs	https://doi.org/10.1021/cm404068e
State	Published - Apr 8 2014

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@article{eec50eb1ab6e42bb92f25dfb9c1e7070,

title = "The magic-size nanocluster (CdSe)34 as a low-temperature nucleant for cadmium selenide nanocrystals; Room-temperature growth of crystalline quantum platelets",

abstract = "Reaction of Cd(OAc)2·2H2O and selenourea in primary-amine/secondary-amine cosolvent mixtures affords crystalline CdSe quantum platelets at room temperature. Their crystallinity is established by X-ray diffraction analysis (XRD), high-resolution transmission electron microscopy (TEM), and their sharp extinction and photoluminescence spectra. Reaction monitoring establishes the magic-size nanocluster (CdSe)34 to be a key intermediate in the growth process, which converts to CdSe quantum platelets by first-order kinetics with no induction period. The results are interpreted to indicate that the critical crystal-nucleus size for CdSe under these conditions is in the range of (CdSe)34 to (CdSe)68. The nanocluster is obtained in isolated form as [(CdSe)34(n- octylamine)16(di-n-pentylamine)2], which is proposed to function as crystal nuclei that may be stored in a bottle.",

author = "Yuanyuan Wang and Ying Zhang and Fudong Wang and Giblin, \{Daryl E.\} and Jessica Hoy and Rohrs, \{Henry W.\} and Loomis, \{Richard A.\} and Buhro, \{William E.\}",

year = "2014",

month = apr,

day = "8",

doi = "10.1021/cm404068e",

language = "English",

volume = "26",

pages = "2233--2243",

journal = "Chemistry of Materials",

issn = "0897-4756",

number = "7",

}

TY - JOUR

T1 - The magic-size nanocluster (CdSe)34 as a low-temperature nucleant for cadmium selenide nanocrystals; Room-temperature growth of crystalline quantum platelets

AU - Wang, Yuanyuan

AU - Zhang, Ying

AU - Wang, Fudong

AU - Giblin, Daryl E.

AU - Hoy, Jessica

AU - Rohrs, Henry W.

AU - Loomis, Richard A.

AU - Buhro, William E.

PY - 2014/4/8

Y1 - 2014/4/8

N2 - Reaction of Cd(OAc)2·2H2O and selenourea in primary-amine/secondary-amine cosolvent mixtures affords crystalline CdSe quantum platelets at room temperature. Their crystallinity is established by X-ray diffraction analysis (XRD), high-resolution transmission electron microscopy (TEM), and their sharp extinction and photoluminescence spectra. Reaction monitoring establishes the magic-size nanocluster (CdSe)34 to be a key intermediate in the growth process, which converts to CdSe quantum platelets by first-order kinetics with no induction period. The results are interpreted to indicate that the critical crystal-nucleus size for CdSe under these conditions is in the range of (CdSe)34 to (CdSe)68. The nanocluster is obtained in isolated form as [(CdSe)34(n- octylamine)16(di-n-pentylamine)2], which is proposed to function as crystal nuclei that may be stored in a bottle.

AB - Reaction of Cd(OAc)2·2H2O and selenourea in primary-amine/secondary-amine cosolvent mixtures affords crystalline CdSe quantum platelets at room temperature. Their crystallinity is established by X-ray diffraction analysis (XRD), high-resolution transmission electron microscopy (TEM), and their sharp extinction and photoluminescence spectra. Reaction monitoring establishes the magic-size nanocluster (CdSe)34 to be a key intermediate in the growth process, which converts to CdSe quantum platelets by first-order kinetics with no induction period. The results are interpreted to indicate that the critical crystal-nucleus size for CdSe under these conditions is in the range of (CdSe)34 to (CdSe)68. The nanocluster is obtained in isolated form as [(CdSe)34(n- octylamine)16(di-n-pentylamine)2], which is proposed to function as crystal nuclei that may be stored in a bottle.

UR - https://www.scopus.com/pages/publications/84897976637

U2 - 10.1021/cm404068e

DO - 10.1021/cm404068e

M3 - Article

AN - SCOPUS:84897976637

SN - 0897-4756

VL - 26

SP - 2233

EP - 2243

JO - Chemistry of Materials

JF - Chemistry of Materials

IS - 7

ER -

The magic-size nanocluster (CdSe)₃₄ as a low-temperature nucleant for cadmium selenide nanocrystals; Room-temperature growth of crystalline quantum platelets

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