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. Author manuscript; available in PMC: 2014 Oct 28.
Published in final edited form as: J Mater Chem B. 2013 Sep 9;1(40):10.1039/C3TB20733A. doi: 10.1039/C3TB20733A

Fig. 2.

Fig. 2

TEM images of the well-defined hollow silica spheres produced at various amounts of TEOS using amino-PS spheres as template. (a) Hollow silica spheres with smooth surface morphology were obtained using 0.5 μL of TEOS after the removal of PS cores by CH2Cl2. (b) Hollow silica spheres with thicker silica coating but rough surface morphology were observed using 1 μl of TEOS. (c) The outer surface of silica spheres became rougher using 2 μl of TEOS. (d) Some free solid silica particles were formed in the solution using 4 μl of TEOS.