Dispersions of alkyl-capped silicon nanocrystals in aqueous media: photoluminescence and ageing

Dickinson, F. M., Alsop, T. A., Al-Sharif, N., Berger, C. E. M., Datta, H. K., Šiller, L., Chao, Y. ORCID: https://orcid.org/0000-0002-8488-2690, Tuite, E. M., Houlton, A. and Horrocks, B. R. (2008) Dispersions of alkyl-capped silicon nanocrystals in aqueous media: photoluminescence and ageing. The Analyst, 133 (11). pp. 1573-1580. ISSN 0003-2654

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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.

Item Type:	Article
Uncontrolled Keywords:	sdg 3 - good health and well-being ,/dk/atira/pure/sustainabledevelopmentgoals/good_health_and_well_being
Faculty \ School:	Faculty of Science > School of Chemistry
UEA Research Groups:	Faculty of Science > Research Groups > Energy Materials Laboratory Faculty of Science > Research Groups > Chemistry of Materials and Catalysis Faculty of Science > Research Groups > Physical and Analytical Chemistry (former - to 2017)
Depositing User:	Rachel Smith
Date Deposited:	21 Mar 2011 12:07
Last Modified:	12 Jun 2024 15:30
URI:	https://ueaeprints.uea.ac.uk/id/eprint/26765
DOI:	10.1039/b801921e

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