Modern optical surfaces for high-end applications such as semiconductor lithography, laser, X-ray radiation, telescopes or space-based optical systems require utmost accuracy of surface form, waviness and roughness. At the same time, the large variety of complex surface forms demand for highly deterministic machining processes.

Particle and energy beam-based technologies like ion beam, plasma and laser machining methods as well as shape cutting technologies like diamond turning provide unique features for ultra-precision surface engineering on the atomic height scale.

The application of these emerging technologies for optical surface fabrication allows to target surface features on the nanometer scale. An interdisciplinary approach to the ultra-precision technologies makes this module a valuable component of the IOM Graduate School for PhD students of engineering and natural sciences.

The module will cover the following topics:

• Modern trends in optical manufacturing
• Ion beam based technologies for ultra-precision optics manufacturing
• Plasma based technologies for ultra-precision surface machining
• Laser ultra-precision optical surface processing
• Methods of ultra-precision surface measurement

Please register directly with Prof. Thomas Arnold before July 1st.

Schedule:

The module provides insights into the synthesis and the surface nanophysics of functional, electrically responsive polyoxometalate-based materials. These molecular metal-oxide clusters can be widely chemically modified, e.g. for specific surface adsorption properties or biocompatibility via DNA-functionalization. Both classical solution-based deposition methods and highly advanced techniques such as ion-beam based ion soft-landing, 3D bio-printing, and photon-based UV-light curing for the controlled deposition and structuring of polyoxometalate compounds on different surface-types will be introduced, as well as important analytical surface methods such as scanning tunneling microscopy and spectroscopy. Besides the pure surface characterization, the latter technique also allows the electron-induced redox switching and the surface modification of the deposited components on the nanoscale. Further, the actual and potential application of these molecular materials in the fields of computing, sensor technology, and medicine will be discussed.

3 days, June 11^th to 13^th

"Please make a binding registration directly with Kirill Monakhov by 25.04.2024."

 Content:

1st day: Lectures (5 acad. h)

• Polyoxometalates and their chemical synthesis (45 min)
• Ion-soft landing of polyoxometalates on surfaces (45 min)
• Bio-functionalization of polyoxometalates (45 min)
• Scanning probe microscopy studies of polyoxometalates (45 min)
• Application of polyoxometalates (45 min)

2nd day: Experimental lab tour (3 acad. h)

• Lab tour to ion soft-landing, scanning tunnelling microscope, and 3D bio-printer with UV light curing system

3rd day: Seminar with theoretical exercises (4 acad. h.)

Plasmas and photons can be used as tools to engineer coating processes and therefore the deposited materials. Process control at non- equilibrium conditions allows for control of thin film or coating properties such as chemical compositions, metastable phase formation, microstructures or enhanced functionalities. In the module students can gain theoretical and practical insight into coating processes and coated surfaces with inorganic, hybrid and polymeric materials relevant for industrial applications as permeation barriers as well as into different coating methods with high potential for applications in the renewable energy field and the hydrogen economy. The module will include introductions into Gas Permeation Barriers, Cathodic Arc Deposition and Magnetron Sputtering, Grain Boundary Engineering and Plasma Diagnostics, Radiation-assisted conversion of molecular precursors and thin film characterization methods. Lab tours for process demonstrations for deposition will follow thin film characterizations. There will be a soft skill part as well regarding project preparations and delving into technical challenges and solutions.

The module will cover the following topics:

• Introduction to Gas Permeation Barriers
• Introduction to Cathodic Arc Deposition and Magnetron Sputtering
• Grain Boundary Engineering and Plasma Diagnostics
• Radiation-assisted conversion of molecular precursors
• X-ray based thin film characterization methods
• Workshop: Project development and Project Defenses
   
• Grain Boundary Engineering by Cathodic Arc Deposition: Delve into the world of advanced materials science and discover how to manipulate grain boundaries to enhance film properties.
• Plasma Diagnostics: Gain hands-on experience with state-of-the-art plasma diagnostic techniques, essential for optimizing deposition processes.
• X-ray Based Film Characterization: Master the art of analyzing thin film structures and properties using X-ray diffraction and fluorescence techniques.
• Photoconversion of Molecular Precursor Films: Explore the innovative approach of using photons to convert molecular precursors into high-quality thin films.

The module will include a module exam.

Instructors: Dr. U. Helmstedt, Dr. Y. Unutulmazsoy

"Please make a binding registration directly with Dr. Y. Unutulmazsoy by 29.10.2024."

Schedule: