0466586 - FZÚ 2017 RIV DE eng J - Článek v odborném periodiku
Herynková, Kateřina - Vorkotter, C. - Šimáková, Petra - Benedikt, J. - Cibulka, Ondřej
Structural and luminescence properties of silicon nanocrystals in colloidal solutions for bio applications.
Physica Status Solidi A. Roč. 213, č. 11 (2016), s. 2873-2878. ISSN 1862-6300. E-ISSN 1862-6319.
[Spring Conference of the European-Materials-Research-Society (E-MRS). Lille, 02.05.2016-06.05.2016]
Grant ostatní: AV ČR(CZ) DAAD-16-18
Program: Bilaterální spolupráce
Institucionální podpora: RVO:68378271
Klíčová slova: silicon nanoparticles * porous silicon * colloidal solutions * surface modification * low-pressure microwave plasma synthesis
Kód oboru RIV: BO - Biofyzika
Impakt faktor: 1.775, rok: 2016

Luminescent silicon nanoparticles are promising for biological and me-dical research as luminescent markers, for drug delivery or toxicity studies. For intracellular biological research, it is necessary to prepare water-based or isotonic colloidal solutions of na-noparticles which are stable and non-toxic. In this work, we compare structural and optical properties of silicon nanocrystals in colloidal solutions, obtained by two fundamentally different methods: A microplasma-based synthesis (a “bottom-up” techni-que) and porous silicon prepared by electrochemical etching of a silicon wafer (a “top-down” method). Low-pressure microwave plasma synthesis produces ~5-8 nm large silicon nanocrystals while the porous siliconcontains clusters ~60-70 nm in diameter, composed of nanometer-sized luminescent nanocrystals. We have attempted to stabilize the nanoparticles via modification of the their surface by methyl groups.

Trvalý link: http://hdl.handle.net/11104/0264858