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Synthesis of water-dispersible photoluminescent silicon nanoparticles and their use in biological fluorescent imaging

Wang, Qi; Ni, Hongjun; Pietzsch, Annette LU ; Hennies, Franz LU ; Bao, Yongping and Chao, Yimin (2011) In Journal of Nanoparticle Research 13(1). p.405-413
Abstract
Water-dispersible silicon nanoparticles (Si-NPs) are desirable for applications in biological techniques. A simplified method to synthesize such particles is reported here. The resulting Si-NPs are water-dispersible and luminescent. Under the excitation of UV light, the Si-NPs emit strong red light with a peak maximum at 606 nm and a quantum yield of 6%. They are highly stable, and remain so over several weeks. Fourier Transform Infrared (FTIR) spectroscopy shows a visible Si-CH2 scissoring vibration mode. Furthermore, the surface chemical bondings were confirmed by X-ray photoelectron spectroscopy (XPS). In the Si2p and C1s core levels, Si-C components are observed. The diameters of the synthesized Si-NPS as measured by atomic force... (More)
Water-dispersible silicon nanoparticles (Si-NPs) are desirable for applications in biological techniques. A simplified method to synthesize such particles is reported here. The resulting Si-NPs are water-dispersible and luminescent. Under the excitation of UV light, the Si-NPs emit strong red light with a peak maximum at 606 nm and a quantum yield of 6%. They are highly stable, and remain so over several weeks. Fourier Transform Infrared (FTIR) spectroscopy shows a visible Si-CH2 scissoring vibration mode. Furthermore, the surface chemical bondings were confirmed by X-ray photoelectron spectroscopy (XPS). In the Si2p and C1s core levels, Si-C components are observed. The diameters of the synthesized Si-NPS as measured by atomic force microscope (AFM) are approximately 5 nm. Furthermore, the nanoparticles can be taken up by cultured cells. Fluorescence images of Si-NPs within MCF-7 human breast cancer cells show they are distributed throughout the cell tissue. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Silicon nanoparticles, Photoluminescence, X-ray photoelectron, spectroscopy, Bio-imaging, Nanobiology, Nanomedicine
in
Journal of Nanoparticle Research
volume
13
issue
1
pages
405 - 413
publisher
Springer
external identifiers
  • wos:000286667000033
  • scopus:79551596637
ISSN
1572-896X
DOI
10.1007/s11051-010-0047-7
language
English
LU publication?
yes
id
7ccd102e-f7ef-4ac1-a405-ad952f8dbd78 (old id 1877963)
date added to LUP
2011-04-15 15:44:03
date last changed
2017-09-10 03:12:29
@article{7ccd102e-f7ef-4ac1-a405-ad952f8dbd78,
  abstract     = {Water-dispersible silicon nanoparticles (Si-NPs) are desirable for applications in biological techniques. A simplified method to synthesize such particles is reported here. The resulting Si-NPs are water-dispersible and luminescent. Under the excitation of UV light, the Si-NPs emit strong red light with a peak maximum at 606 nm and a quantum yield of 6%. They are highly stable, and remain so over several weeks. Fourier Transform Infrared (FTIR) spectroscopy shows a visible Si-CH2 scissoring vibration mode. Furthermore, the surface chemical bondings were confirmed by X-ray photoelectron spectroscopy (XPS). In the Si2p and C1s core levels, Si-C components are observed. The diameters of the synthesized Si-NPS as measured by atomic force microscope (AFM) are approximately 5 nm. Furthermore, the nanoparticles can be taken up by cultured cells. Fluorescence images of Si-NPs within MCF-7 human breast cancer cells show they are distributed throughout the cell tissue.},
  author       = {Wang, Qi and Ni, Hongjun and Pietzsch, Annette and Hennies, Franz and Bao, Yongping and Chao, Yimin},
  issn         = {1572-896X},
  keyword      = {Silicon nanoparticles,Photoluminescence,X-ray photoelectron,spectroscopy,Bio-imaging,Nanobiology,Nanomedicine},
  language     = {eng},
  number       = {1},
  pages        = {405--413},
  publisher    = {Springer},
  series       = {Journal of Nanoparticle Research},
  title        = {Synthesis of water-dispersible photoluminescent silicon nanoparticles and their use in biological fluorescent imaging},
  url          = {http://dx.doi.org/10.1007/s11051-010-0047-7},
  volume       = {13},
  year         = {2011},
}