Pulsed laser deposition modelling

Guo et al. " proposed that there exists a de-doping effect in nanometer-thick YSZ films, which results in a lower bulk conductivity in nanocrystalline YSZ (grain size 80 nm, thickness = 12 and 25 nm) than in the microcrystalline specimen. They predicted that the conductivity of nanostructured YSZ (e.g., <5 nm) will be even smaller, analyzing from a space charge model. Because XRD results were not provided, neither the crystallinity nor the existence of the second phase is known in YSZ films grown by Pulsed Laser Deposition (PLD). However, electrical measurements were carefully carried out in both dry and wet O2, and the overall conductivity in their YSZ films is lower than that of bulk YSZ (grain size > 15 pm) by a factor of 4 (figure 10.8). [Pg.221]

Since its discovery, laser polymer processing has become an important field of applied and fundamental research. The research can be separated into two fields, the investigation of the ablation mechanism and its modeling and the application of laser ablation to produce novel materials. Laser ablation is used as an analytical tool in matrix-assisted laser desorption/ionization (MALDI) [12,13] and laser-induced breakdown spectroscopy (LIBS) [14] or as preparative tool for pulsed laser deposition (PLD) of synthetic polymers [15,16] and of inorganic films [17,18],... [Pg.542]

Schmidt et al. [136] also reported room-temperature spectroscopic ellipsometry results on pulsed laser deposition-grown wurtzite MgxZni xO (0thin films. The refractive index data were fit to a three-term Cauchy approximation type formula (Equation 3.105), and the anisotropic Cauchy model parameters A, B, and C for ZnO were obtained as 1.916,1.76, and 3.9 for E J c and 1.844,1.81, and 3.6 for... [Pg.194]

Figure 34.8 Left) A 5 xm-thick Lao.sSro.sCoOs-g membrane prepared by pulsed laser deposition on porous support with as described in Figure 34.6. Right) Membrane thickness dependence of O2 flux at 900°C, = 20kPa,pP = 3 kPa. The drawn line is based on a transport model with surface...

Singh R. K. and Nara3 n )., Pulsed-laser evaporation technique for deposition of thin films Physics and theoretical model, Phys. Rev. B, 41, 8843-8859 (1990). [Pg.297]

Paul, A.J. Schenck, P.K. Bonnell, D.W. Hastie, J.W. "In Situ Monitoring and Model Simulations of BaTi03 Pulsed Laser Thin Film Deposition" In Film Synthesis and Growth Using Energetic Beams Atwater, H.A., Dickinson, J.T., Lowndes, D.H., Polman, A., Eds. MRS Symp. Series Vol. 388 Materials Research Society Pittsburgh, PA, 1996, 45-50. [Pg.50]

The mechanism of the iodide formation at platinum immersed in aqueous electrode was recently studied by laser-activated voltammetry in a channel flow cell system [161]. In this technique, solid deposits of iodine are removed from the electrode continuously by short nanosecond high-power laser pulses. By removing deposits on electrode surfaces within a channel flow cell, the voltammetric measurements becomes time independent and data can be analyzed and modeled quantitatively. Laser activation using a 10-Hz pulsed Nd YAG 532-nm laser was shown to remove bulk iodine from the electrode surface so that under sustained pulsed... [Pg.292]

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