Photoluminescent silicon nanocrystals stabilized by ionic liquid

A. Kamyshny; V. N. Zakharov; M. A. Zakharov; A. V. Yatsenko; S. V. Savilov; L. A. Aslanov; S. Magdassi

doi:10.1007/s11051-010-9950-1

Photoluminescent silicon nanocrystals stabilized by ionic liquid

A. Kamyshny^*, V. N. Zakharov, M. A. Zakharov, A. V. Yatsenko, S. V. Savilov, L. A. Aslanov, S. Magdassi

^*Corresponding author for this work

Institute of Chemistry

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

15 Scopus citations

Abstract

Silicon nanocrystals stabilized by an ionic liquid, dimethylimidazolium iodide, were synthesized by chemical reduction of SiBr4 with metallic Na in an organic solvent, diglyme. The nanoparticles were crystalline with a diamond cubic lattice and average size of 3.5 nm. Solid state ¹³C- and ²⁹Si-NMR CP MAS spectra indicate the formation of imidazolium carbene, which ligates the Si atoms at the surface of the nanoparticles. The synthesized Si nanoparticles exhibit photoluminescence with an emission maximum in the red spectral range when excited at 320 nm. The origin of this luminescence is suggested to be mainly related to quantum confinement.

Original language	English
Pages (from-to)	1971-1978
Number of pages	8
Journal	Journal of Nanoparticle Research
Volume	13
Issue number	5
DOIs	https://doi.org/10.1007/s11051-010-9950-1
State	Published - May 2011

Bibliographical note

Funding Information:
Acknowledgments Authors thank Prof. Yury Shapiro for helpful discussion of NMR data. The research was supported by Russian Foundation for Basic Research (grant 06-03-72009) and Israeli Ministry of Sciences (contract No. 3-566).

Keywords

Carbene
Ionic liquids
Nanoparticles
Silicon nanocrystals
Silicon photoluminescence

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10.1007/s11051-010-9950-1

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title = "Photoluminescent silicon nanocrystals stabilized by ionic liquid",

abstract = "Silicon nanocrystals stabilized by an ionic liquid, dimethylimidazolium iodide, were synthesized by chemical reduction of SiBr4 with metallic Na in an organic solvent, diglyme. The nanoparticles were crystalline with a diamond cubic lattice and average size of 3.5 nm. Solid state 13C- and 29Si-NMR CP MAS spectra indicate the formation of imidazolium carbene, which ligates the Si atoms at the surface of the nanoparticles. The synthesized Si nanoparticles exhibit photoluminescence with an emission maximum in the red spectral range when excited at 320 nm. The origin of this luminescence is suggested to be mainly related to quantum confinement.",

keywords = "Carbene, Ionic liquids, Nanoparticles, Silicon nanocrystals, Silicon photoluminescence",

author = "A. Kamyshny and Zakharov, {V. N.} and Zakharov, {M. A.} and Yatsenko, {A. V.} and Savilov, {S. V.} and Aslanov, {L. A.} and S. Magdassi",

note = "Funding Information: Acknowledgments Authors thank Prof. Yury Shapiro for helpful discussion of NMR data. The research was supported by Russian Foundation for Basic Research (grant 06-03-72009) and Israeli Ministry of Sciences (contract No. 3-566).",

year = "2011",

month = may,

doi = "10.1007/s11051-010-9950-1",

language = "אנגלית",

volume = "13",

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journal = "Journal of Nanoparticle Research",

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AU - Kamyshny, A.

AU - Zakharov, V. N.

AU - Zakharov, M. A.

AU - Yatsenko, A. V.

AU - Savilov, S. V.

AU - Aslanov, L. A.

AU - Magdassi, S.

N1 - Funding Information: Acknowledgments Authors thank Prof. Yury Shapiro for helpful discussion of NMR data. The research was supported by Russian Foundation for Basic Research (grant 06-03-72009) and Israeli Ministry of Sciences (contract No. 3-566).

PY - 2011/5

Y1 - 2011/5

N2 - Silicon nanocrystals stabilized by an ionic liquid, dimethylimidazolium iodide, were synthesized by chemical reduction of SiBr4 with metallic Na in an organic solvent, diglyme. The nanoparticles were crystalline with a diamond cubic lattice and average size of 3.5 nm. Solid state 13C- and 29Si-NMR CP MAS spectra indicate the formation of imidazolium carbene, which ligates the Si atoms at the surface of the nanoparticles. The synthesized Si nanoparticles exhibit photoluminescence with an emission maximum in the red spectral range when excited at 320 nm. The origin of this luminescence is suggested to be mainly related to quantum confinement.

AB - Silicon nanocrystals stabilized by an ionic liquid, dimethylimidazolium iodide, were synthesized by chemical reduction of SiBr4 with metallic Na in an organic solvent, diglyme. The nanoparticles were crystalline with a diamond cubic lattice and average size of 3.5 nm. Solid state 13C- and 29Si-NMR CP MAS spectra indicate the formation of imidazolium carbene, which ligates the Si atoms at the surface of the nanoparticles. The synthesized Si nanoparticles exhibit photoluminescence with an emission maximum in the red spectral range when excited at 320 nm. The origin of this luminescence is suggested to be mainly related to quantum confinement.

KW - Carbene

KW - Ionic liquids

KW - Nanoparticles

KW - Silicon nanocrystals

KW - Silicon photoluminescence

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SN - 1388-0764

VL - 13

SP - 1971

EP - 1978

JO - Journal of Nanoparticle Research

JF - Journal of Nanoparticle Research

IS - 5

ER -

Photoluminescent silicon nanocrystals stabilized by ionic liquid

Abstract

Bibliographical note

Keywords

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