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. 2013 Aug 10;3(9):650–657. doi: 10.7150/thno.6668

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© Ivyspring International Publisher. This is an open-access article distributed under the terms of the Creative Commons License (http://creativecommons.org/licenses/by-nc-nd/3.0/). Reproduction is permitted for personal, noncommercial use, provided that the article is in whole, unmodified, and properly cited.

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Fig 4 — a) Photographs taken before and after incubation of FL-SiO₂ nanoparticle with HF. The solution remained luminescent after the treatment. b) Emission spectra of FL-SiO₂ nanoparticles, taken before and after HF treatment. c) TEM image of FL-SiO₂ nanoparticles after being treated with HF. Silica matrix was removed, leaving C-Dots with a diameter of ~3 nm.