Spontaneous shape and phase control of colloidal ZnSe nanocrystals by tailoring Se precursor reactivity

Wei Chen, Amir Karton, Tanveer Hussian, Shaghraf Javaid, Fei Wang, Yingping Pang, Guohua Jia

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Herein we demonstrated that the shape and phase of colloidal ZnSe nanocrystals can be spontaneously tuned through tailoring the selenium precursor reactivity in a phosphine-free reaction system. Selenium species with diverse reaction activities, i. e. Se-2(2)-or Se2-, were produced by the addition of different volumes of reductant superhydride (lithium triethylborohydride). Theoretical calculation of.Gr indicates that superhydride-reduced Se-2(2-) is less active than Se2- for the reaction with a Zn precursor. Nanoparticle growth using Se(2)(2-)produces wurtzite ZnSe nanorods whereas the reaction of more reactive Se2- with the zinc precursor leads to the formation of spherical zinc blende ZnSe nanodots. This work not only provides a facile synthetic approach for the preparation of high quality ZnSe nanocrystals but also gives insights into the shape and phase control of other colloidal nanocrystals.

Original languageEnglish
Pages (from-to)2955-2961
Number of pages7
JournalCrystEngComm
Volume21
Issue number18
DOIs
Publication statusPublished - 14 May 2019

Cite this

Chen, Wei ; Karton, Amir ; Hussian, Tanveer ; Javaid, Shaghraf ; Wang, Fei ; Pang, Yingping ; Jia, Guohua. / Spontaneous shape and phase control of colloidal ZnSe nanocrystals by tailoring Se precursor reactivity. In: CrystEngComm. 2019 ; Vol. 21, No. 18. pp. 2955-2961.
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abstract = "Herein we demonstrated that the shape and phase of colloidal ZnSe nanocrystals can be spontaneously tuned through tailoring the selenium precursor reactivity in a phosphine-free reaction system. Selenium species with diverse reaction activities, i. e. Se-2(2)-or Se2-, were produced by the addition of different volumes of reductant superhydride (lithium triethylborohydride). Theoretical calculation of.Gr indicates that superhydride-reduced Se-2(2-) is less active than Se2- for the reaction with a Zn precursor. Nanoparticle growth using Se(2)(2-)produces wurtzite ZnSe nanorods whereas the reaction of more reactive Se2- with the zinc precursor leads to the formation of spherical zinc blende ZnSe nanodots. This work not only provides a facile synthetic approach for the preparation of high quality ZnSe nanocrystals but also gives insights into the shape and phase control of other colloidal nanocrystals.",
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Spontaneous shape and phase control of colloidal ZnSe nanocrystals by tailoring Se precursor reactivity. / Chen, Wei; Karton, Amir; Hussian, Tanveer; Javaid, Shaghraf; Wang, Fei; Pang, Yingping; Jia, Guohua.

In: CrystEngComm, Vol. 21, No. 18, 14.05.2019, p. 2955-2961.

Research output: Contribution to journalArticle

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AU - Chen, Wei

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AU - Hussian, Tanveer

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AU - Pang, Yingping

AU - Jia, Guohua

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AB - Herein we demonstrated that the shape and phase of colloidal ZnSe nanocrystals can be spontaneously tuned through tailoring the selenium precursor reactivity in a phosphine-free reaction system. Selenium species with diverse reaction activities, i. e. Se-2(2)-or Se2-, were produced by the addition of different volumes of reductant superhydride (lithium triethylborohydride). Theoretical calculation of.Gr indicates that superhydride-reduced Se-2(2-) is less active than Se2- for the reaction with a Zn precursor. Nanoparticle growth using Se(2)(2-)produces wurtzite ZnSe nanorods whereas the reaction of more reactive Se2- with the zinc precursor leads to the formation of spherical zinc blende ZnSe nanodots. This work not only provides a facile synthetic approach for the preparation of high quality ZnSe nanocrystals but also gives insights into the shape and phase control of other colloidal nanocrystals.

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