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- W1996548395 abstract "A novel preparation method, which involves the use of microemulsions, sol?gel chemistry and chemical solution deposition, has been developed in this work for the preparation of layers of PbTiO3 nanostructures supported on SrTiO3 substrates. A transparent solution was first prepared by mixing a PbTiO3 precursor sol and a microemulsion formed by water, cyclohexane and the surfactant Brij 30 (polyoxyethylene(4) lauryl ether). The solution was deposited onto the SrTiO3 substrate by spin-coating and dried under controlled conditions (temperature, time and relative humidity) to favor the rearrangement of the micelles in the deposited coat. After a rapid thermal treatment of crystallization at 650??C, nanostructures with uniform sizes of ~40?nm diameter and showing periodicity in some zones of the substrate are obtained. The analysis of these nanostructures by grazing-incidence x-ray synchrotron radiation indicates that they have a perovskite structure with a preferred orientation and that they are under strained conditions. Thermal treatments at higher temperatures produce the collapse of the ordered nanoparticles' network and the formation of larger isolated particles of PbTiO3 with a truncated-pyramid morphology. Piezoresponse force microscopy studies demonstrate that the spontaneous polarization of these PbTiO3 nanostructures can be switched and that they have piezoelectric activity. These results support the fabrication strategy here proposed as a promising approach for the preparation of nanoferroelectrics onto substrates of possible interest in future nanoelectronic devices." @default.
- W1996548395 created "2016-06-24" @default.
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- W1996548395 date "2007-08-22" @default.
- W1996548395 modified "2023-10-17" @default.
- W1996548395 title "Ferroelectric self-assembled PbTiO<sub>3</sub>perovskite nanostructures onto (100)SrTiO<sub>3</sub>substrates from a novel microemulsion aided sol–gel preparation method" @default.
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- W1996548395 doi "https://doi.org/10.1088/0957-4484/18/37/375603" @default.
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