Snow particle motion in process of cornice formation

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Nanocomposite thin films exhibit interesting optical properties which differ from those of the pure constituents. Effective medium theories are used to model the dielectric function of the nanocomposite materials. We give an introduction to the theories of ...

The demand for tools suitable for deposition of small amount of material is continuously increasing. A standard SiN cantilever was modified in order to dispense single droplets of femto- and ato-liter (NAnoscale DISpensing (NADIS)). In order to open a nano fluid channel, holes down to 100 nm were milled in the apex of the cantilever using FIB. The liquid to dispense is loaded on the top-side of the cantilever extremity.

Recently, some research effort has been instigated towards micro and nano patterning of curved surfaces, as system miniaturization by means of patterned planar surfaces has practically reached its limits. In contrast to the more practical approach of existing research, the idea of this project was to do basic research on one effect encountered especially during vapour deposition on curved surfaces.

We report on a study of pentacene thin-films grown by high vacuum deposition on silicon dioxide, using atomic force microscopy (AFM) and transmission electron microscopy (TEM). The nucleation density of pentacene islands on SiO2is found to rise as the deposition rate is increased but decreases at higher substrate temperature. This observation is consistent with the predictions of the rate-equation formalism for homogeneous nucleation. Hence, by controlling the two deposition parameters we are abl

The influence of the surface morphology of semicrystalline polyamide 12 PA12! on the adhesion of thin silicon oxide coatings is analyzed by means of uniaxial fragmentation tests and scanning local-acceleration microscopy SLAM!. Two types of PA12 substrates are investigated, namely, as-received PA12, which contains large spherulites, and quenched PA12, which has a relatively smooth, homogeneous surface structure. The adhesion of the coating is found to be identical for the two types of PA12. This indicates t

Capture numbers are used in models of nucleation and growth on surfaces, and have been widely applied to predict nucleation densities and other quantities via rate equations. In conventional nucleation theory, much effort has historically been expended on obtaining good expressions for capture numbers in the diffusion-limited case. However, recent experiments and calculations have shown that weak repulsive interactions between adsorbate atoms on relatively smooth (e.g., close-packed metal) surfaces may shif

We report here on ferromagnetic/superconductor FM/SC and SC/FM double layers deposited without a buffer layer between FM and SC. Thin films of La0.7Sr0.3MnO3 (LSMO) are used for the FM, and YBa2Cu3O7-x (YBCO) for the SC. Both films can grow crystalline on SrTiO3 (STO) or LaAlO3 (LAO) substrates in high temperature and in oxygen atmosphere conditions. Magnetic and transport measurements and X-ray diffraction analysis are used to characterise film quality and properties. It is shown that off-axis magnetron sp

It is well known and surprising that the uncoded transmission of an independent and identically distributed Gaussian source across an additive white Gaussian noise channel is optimal: No amount of sophistication in the coding strategy can ever perform better. What makes uncoded transmission optimal? In this thesis, it is shown that the optimality of uncoded transmission can be understood as the perfect match of four involved measures: the probability distribution of the source, its distortion measure, the c

Fabrication of high-density ferroelectric memories requires the growth of the ferroelectric material on the drain contact metal. In standard 0.5 mum technology, tungsten plugs are applied to connect the drain contacts to the first metallization level. In this work, we investigated electrode systems to be applied between sputter deposited, ferroelectric PbZr0.35Ti0.65O3 (PZT) and tungsten. Besides the obvious barrier function of such an electrode system, the texture of the PZT is of interest as well. The rou

The ECW system on Tokamak a configuration variable (TCV) allows the study of a wide range of poloidal and toroidal launch angles. Both electron cyclotron heating (ECH) and electron cyclotron current drive (ECCD) experiments have been performed to demonstrate the modification of the electron temperature and current profiles. In particular a multi-channel hard X-ray camera (on loan from Cadarache) clearly shows the generation of a high energy electron tail, which increases with increasing toroidal launch angl

Calcium phosphate cements (CPC) are increasingly used in the orthopedic field. This kind of cement has potential applications in bone defect replacements, osteosynthetic screw reinforcements or drug delivery. In vivo studies have demonstrated a good osteointegration of CPC. However, it was also observed that the resorption of CPC could create particles. It is known from orthopedic implant studies that particles can be responsible for the peri-implant osteolysis. Biocompatibility assessment of CPC should the

Highly textured PZT(111), PZT(001/100) and random PZT films have been grown on Pt and RuO2 bottom electrodes by means of an in-situ, multimagnetron reactive sputtering process with three metal targets (Pb, Zr, Ti). The orientation was varied with the bottom electrode/PZT initial interlayer deposition conditions. Series of 300 nm thick films with varying composition x have been prepared. The Ti and Zr ratio was changed by adjusting the powers of the corresponding targets. The lead content was self stabilized

Snow particle motion in process of cornice formation

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Optical properties of metal-doped carbon based nanocomposite thin films: Comparing experiment to effective medium theories

NANOSCALE DISPENSING OF LIQUIDS WITH AFM-CANTILEVER

Deposition on Curved Surfaces by Means of E-Beam Evaporation

Nucleation and growth of ultrathin pentacene films on silicon dioxide: effect of deposition rate and substrate temperature

Effect of substrate crystalline morphology on the adhesion of plasma enhanced chemical vapor deposited thin silicon oxide coatings on polyamide

Capture numbers in the presence of repulsive adsorbate interactions

YBCO/LSMO and LSMO/YBCO double-layer deposition by off-axis magnetron sputtering and strain effects

To code or not to code

Tungsten based electrodes for stacked capacitor ferroelectric memories

Sustained fully non-inductive scenarios using pressure and current profile control with ECCD

The effects of calcium phosphate cement particles on osteoblast functions

Piezoelectric and dielectric properties of sputter deposited (111), (100) and random-textured Pb(ZrxTi1-x)O-3 (PZT) thin films