Self-ordered TiO2 quantum dot array prepared via anodic oxidation.

Nanoscale Research Letters
Jana DrbohlavovaJaromir Hubalek

Abstract

The template-based methods belong to low-cost and rapid preparation techniques for various nanostructures like nanowires, nanotubes, and nanodots or even quantum dots [QDs]. The nanostructured surfaces with QDs are very promising in the application as a sensor array, also called 'fluorescence array detector.' In particular, this new sensing approach is suitable for the detection of various biomolecules (DNA, proteins) in vitro (in clinical diagnostics) as well as for in vivo imaging.The paper deals with the fabrication of TiO2 planar nanostructures (QDs) by the process of titanium anodic oxidation through an alumina nanoporous template on a silicon substrate. Scanning electron microscopy observation showed that the average diameter of TiO2 QDs is less than 10 nm. Raman spectroscopic characterization of self-organized titania QDs confirmed the presence of an anatase phase after annealing at 400°C in vacuum. Such heat-treated TiO2 QDs revealed a broad emission peak in the visible range (characterized by fluorescence spectroscopy).

References

Jul 21, 2006·The Journal of Physical Chemistry. B·Pavan K NaickerJillian F Banfield
Apr 1, 2009·International Journal of Molecular Sciences·Jana DrbohlavovaJaromir Hubalek
Feb 18, 2010·International Journal of Molecular Sciences·Gregor P C Drummen

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Citations

Jun 4, 2015·Nanomedicine·Sona KrizkovaRene Kizek
Dec 30, 2016·Chemistry : a European Journal·Sanjiv SonkariaVarsha Khare

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Methods Mentioned

BETA
biosensors
biosensing
scanning electron microscopy
atomic force microscopy
AFM
fluorescence spectroscopy
fluorescence array

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