1. Synthesis and pore filling mechanism in anatase TiO2 nanostructured network mediated by PbS molecular adsorption.
- Author
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Dutta, N., Mohanta, D., and Choudhury, A.
- Subjects
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TITANIUM dioxide , *ADSORPTION (Chemistry) , *X-ray diffraction , *ELECTRON microscopy , *ATOMIC force microscopy - Abstract
In this work, we show that anatase nanoporous titanium dioxide (TiO2) structures can be sensitized by adequate PbS molecular adsorption. This was substantiated through x-ray diffraction, electron microscopy, atomic force microscopy, and nitrogen adsorption/desorption studies. The atomic force micrograph of the PbS/TiO2 system is characterized by a smooth surface topography as compared to the untreated TiO2 network. Further, N2 adsorption/desorption studies have revealed that the pores having a size greater than the Bohr exciton size (∼3.1 nm) of TiO2 can be efficiently filled by PbS molecules, whereas the smaller pores remain unfilled. The pore filling aspects, along with the kinetics of molecular adsorption in the coupled heterogeneous nanostructured system, would help to reveal the underlying mechanism of interfacial charge leakage phenomena in miniaturized nanoelectronic and nanophotonic junctions/components. [ABSTRACT FROM AUTHOR]
- Published
- 2011
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