Tools
Tools
Wang, Qi, Ni, Hongjun, Pietzsch, Annette, Hennies, Franz, Bao, Yongping 
ORCID: https://orcid.org/0000-0002-6425-0370 and Chao, Yimin ORCID: https://orcid.org/0000-0002-8488-2690
(2011)
Synthesis of water-dispersible photoluminescent silicon nanoparticles and their use in biological fluorescent imaging.
Journal of Nanoparticle Research, 13 (1).
pp. 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 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.
Actions (login required)
 |
View Item |