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Design of Metal-Organic Molecular Precursors for Atomic Layer Deposition
Dr. Jan Gerkens
Design of Metal-Organic Molecular Precursors for Atomic Layer Deposition
- Atomic layer deposition: Challenges and opportunities
- Synthesis and characterization of a new series of low-valent cobalt amido complexes
- Identification of promising cobalt containing precursors for atomic layer deposition...
In past decades, miniaturization of materials was immanent in all fields of technology, especially in semiconductor industry. Nowadays, miniaturization of semiconducting compounds reached a level where established manufacturing processes reach their technical limits. Atomic Layer Deposition (ALD) offers an alternative method for the deposition of ultra-thin metallic films, which is a crucial step in the fabrication of semiconducting compounds. Based on a chemical reaction between surface and gas phase, ALD is a process which touches both synthetic chemistry and material sciences. This PhD thesis focuses on the development of new chemicals for the use as precursor in ALD. Within a research and development cooperation with BASF, the properties of a new series of cobalt and nickel silylamido complexes in solution, in the solid state and in the gas phase are studied and evaluated with respect to their use as ALD precursor. Furthermore, deposition experiments of tantalum and molybdenum chalcogenides were performed to test the application of ALD in the field of electrochemical water splitting.
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39,90 € *
9783863761820
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Ammonium Polyphosphat - Membranen
Norbert Kluy
Ammonium Polyphosphat - Membranen
Brennstoffzellen sind ein Versprechen für die Zukunft dank moderner Technik und noch großem Verbesserungspotential. An dieser Stelle setzt diese Arbeit ein und entwickelt eine neue Klasse von Materialien in Hinblick auf ihren Einsatz in Brennstoffzellen. Der resultierende Verbundwerkstoff liegt in Form einer dünnen und flexiblen Membrane vor und wird hinsichtlich seines Aufbaus beschrieben. Die Beschreibung erklärt die stofflichen Eigenschaften und findet darin die optimalen Parameter für den Einsatz der Membranen als Elektrolyt in einer Brennstoffzelle. Besonderer Augenmerk liegt in der Untersuchung der Langzeitstabilität sowie dem Verhalten bei sich zyklisch ändernden Umgebungsbedingungen.
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39,90 € *
9783863761486
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Synthesis, Characterization and Surface Modification of Titanium and Zinc Oxide Nanostructures...
Dr. Osman Arslan
Synthesis, Characterization and Surface Modification of Titanium and Zinc...
Fabrication of ZnO QD’s for visible light emission applications, surface modulation for stability in dispersions and defect control at the surface is vitally important. Therefore long alkyl chain group (e.g. oleate) and biological molecule cysteine were used together with sol-gel chemistry as vectors to regulate reactivity of the ZnO QD’s and their visible light emission. Additionally, using different ligand concentrations and reaction conditions, semiconductor nanostructures of unusual geometrical shapes were synthesized and characterized. Hexagonal crystal growing habit of ZnO provided unusual geometrically distorted examples of the same geometry that have not been reported so far in the literature. Furthermore, TiO2 nanostructures with significant absorption in visible range of the solar spectrum were obtained by hot injection method and rapid injection and decomposition of Ti-precursor and amine enabled to produce self assembled ball like and multibranched structures with remarkable visible range absorption.
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34,90 € *
9783863761325
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Modelling Phosphorus Flows in Soils
Andreas Kreuzeder
Modelling Phosphorus Flows in Soils
The outstanding importance of phosphorus (P) in all living cells makes it an essential nutrient. Its pivotal use as a fertilizer and the finiteness as a natural resource lead to a new episode of historic importance: A possible upcoming phosphate crisis. In this book an overview on the role of phosphorus as a nutrient and as a fertilizer as well as the underlying soil dynamics is given. The flows of phosphorus in Austria are shown by using the method of material flow analysis (MFA). Furthermore, a 'System Dynamics P-Model' was developed to outline the characteristics of phosphorus and its use in soils. This model considers the complex interactions and processes in soils. It shows the influence of soil properties, the effects of fertilizer use and crop uptake, and their dynamic interrelations.
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29,90 € *
9783941274853
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