Browsing by Author "Kostovski, G"

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    Nanocolumnar preferentially oriented PSZT thin films deposited on thermally grown silicon dioxide
    (Springer, 2009-01) Sriram, S; Bhaskaran, M; Mitchell, A; Mitchell, DRG; Kostovski, G
    We report the first instance of deposition of preferentially oriented, nanocrystalline, and nanocolumnar strontium-doped lead zirconate titanate (PSZT) ferroelectric thin films directly on thermal silicon dioxide. No intermediate seed or activation layers were used between PSZT and silicon dioxide. The deposited thin films have been characterised using a combination of diffraction and microscopy techniques. © 2009, Springer.
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    Synthesis of self-assembled island-structured complex oxide dielectric films
    (American Chemical Society, 2009-09-24) Sriram, S; Bhaskaran, M; Kostovski, G; Mitchell, DRG; Stoddart, PR; Austin, MW; Mitchell, A
    A self-assembly driven process to synthesize island-structured dielectric films is presented. An intermetallic reaction in platinized silicon substrates provides preferential growth sites for the complex oxide dielectric layer. Microscopy and spectroscopy analyses have been used to propose a mechanism for this structuring process. This provides a simple and scalable process to synthesize films with increased surface area for sensors, especially those materials with a complex chemistry. The ability of these island-structured dielectric films to improve sensitivity by a factor of 100 compared to continuous films in applications as substrates for surface-enhanced Raman scattering (SERS) is demonstrated. © 2009, American Chemical Society