Nano Archive

Ferroelectric PbTiO3 nanostructures onto Si-based substrates with size and shape control

Calzada, M. L. and Torres, M. and Ricote, J. and Pardo, L. (2009) Ferroelectric PbTiO3 nanostructures onto Si-based substrates with size and shape control. Journal of Nanoparticle Research, 11 (5). pp. 1227-1233.


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A bottom-up approach based on the use of a microemulsion-assisted chemical solution deposition method, previously developed for the fabrication of PbTiO3 nanostructures onto single crystal SrTiO3 substrates, is used here on polycrystalline Pt/Si-based substrates, aiming at their integration with the current microelectronics technology. This bottom-up approach not only does not produce any damage to the nanostructures, thus not affecting noticeably their ferroelectric properties, but also solves some of the problems associated to those approaches that use the microstructural instability of ultrathin films, where islands with different shapes and sizes (single or bimodal log-normal distributions) are obtained. In this case, normal (Gaussian) size distributions are obtained, with average lateral sizes of ~70 nm, weakly depending on the solution concentration. These results show that the growth process of the nanoparticles takes place independently from one another inside the isolated micelles of the precursor solution, whose shape and size distribution therefore control effectively those of the PbTiO3 nanostructures.

Item Type:Article
Subjects:Physical Science > Nano objects
Physical Science > Nanoelectronics
ID Code:5574
Deposited By:IoN
Deposited On:29 Jun 2009 16:25
Last Modified:29 Jun 2009 16:25

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