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. Author manuscript; available in PMC: 2013 Sep 28.
Published in final edited form as: Nanotechnology. 2012 Sep 5;23(38):385308. doi: 10.1088/0957-4484/23/38/385308

Figure 5.

Figure 5

A. Photoluminescence spectra of TiO2-coated membranes and a Silicon Nitride membrane, showing the low photoluminescence at the visible wavelength. B. XPS spectra of a TiO2-coated membrane. C. Optical background comparison between TiO2 and Silicon nitride membranes when excited by a 488 nm laser under TIRF illumination and with the emission band at 650–700 nm. The inset shows the enhancement in image contrast of the single quantum dots on a TiO2-coated membranes versus a Silicon Nitride membrane (scale bars equal 5 μm).

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