Affiliation
Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), Facility for X-ray Diffraction at the University of Duisburg-Essen, Germany
Title
"Investigation of nanostructural materials by means of X-ray powder diffraction"
The Facility for X-ray Diffraction of the University of Duisburg-Essen will be presenting the different possibilities of measurements with various examples in powder X-Ray diffraction (PXRD), especially for the investigation of nanostructural materials. In the introductory lectures, some aspects of crystallography and X-ray diffraction will be given, such as the history of X-rays, radiation protection, and work principles of the X-Ray device (diffractometer). Also, the information content of powder diffractograms and the Rietveld-method, with related mathematical background, will be discussed. Within the topic of powder diffraction and the use of the Rietveld refinement, we have several important scientific questions including, but not limited to the following: How are the amorphous and crystalline parts of mixed powders identified (quantitative Phase analysis)? How are the crystallite size, residual stress, texture effect and preferred site occupation of atoms determined? How is it possible to investigate a thin coating on the substrate and nanomaterials (in solution/powder)? Which advantages does the characterization of samples in temperature/gas chamber give? All of these scientific problems can be solved by the use of X-Ray diffractometers in different geometries (e.g. Bragg-Brentano and Debye-Scherrer), working for example on the devices Bruker D8 Advance and Panalytical Empyrean.
Time:
11:00
Description:
Konstantinos Palikaras
«Coordination of mitophagy and mitochondrial biogenesis during ageingin Caenorhabditis elegans»
Friday 5th June 2015 @ 11:00
Seminar room, 3rd floor, Physics Dept.
Time:
12:00 - 13:00
Location:
Seminar Room 1, FORTH’s bldg
Description:
IMBB SEMINAR
Eleni VASSILAKI
CEng, Senior Lecturer (Associate Professor),
Computer Science Department,
University of Sheffield, United Kingdom
Title: "Emergence of connectivity motifs via the interaction of long-term and sort-term plasticity".
Location
Department of Physics Bldg., Voutes, 3rd floor Seminar Room
Time
16:00
Language
English
Abstract
Chemical reactions are the result of successful collisions between reactants (atoms or molecules) of appropriate energy and orientation. Understanding the mechanism in its quantum detail means finding out what energies and orientations lead to reactive collisions at the atomic scale. That knowledge not only improves our understanding of chemical reactivity, but also provides additional levels of control on chemical reactions, opening the way for technological applications.
To obtain this information two experimental approaches are used. The first is measuring the energy and spatial orientation of quantum-state-selected reaction products, with velocity map & slice imaging being the state of the art techniques used. The second approach involves probing the structure of the reactants as they transform into products as a function of time (structural dynamics) with time-resolved X-ray or electron diffraction as the techniques of choice.
In this talk we will present the labs recent slice imaging work on the effects of weak bonding on photochemistry dynamics. We will also discuss the progress on a structural dynamics approach using time-resolved electron diffraction currently under development at FORTH.
Time:
12:00
Description:
Christiana HADJIMICHAEL
Papamatheakis’ Lab
Title: "Novel microRNAs for fine-tuning of mouse Embryonic Stem Cell fate decision through regulation of TGF-β signaling".
Affiliation
Materials Science and Engineering Department, University of Michigan
Title
Electronic and Optical Properties of Ultrathin Materials from First Principles
Location
Department of Physics Bldg., Voutes, 3rd floor Seminar Room
Time
16:00
Language
English
Abstract
We use first-principles calculations based on density functional and many-body perturbation theory to analyze the effects of quantum confinement on the band gap, excitons, and optical properties of two-dimensional materials, as well as ultrathin nitride nanowires and quantum wells. Our calculations for single-layer and double-layer SnSe and GeSe show that these materials exhibit an unusually high absorbance (approaching 40-50%) in the visible range and that they are promising for ultrathin photovoltaic applications. Moreover, our results for few-layer PbI2 reveal the intermediate nature of excitons between the Wannier and Frenkel picture in this material [1]. We also examined the optical properties of ultrathin InN nanowires and GaN quantum wells. Our results show that InN nanostructures with a dimension of ~1 nm can be applied for efficient green-light emission [2], while ultrathin GaN quantum wells with a thickness of 1-4 monolayers can be used for deep ultraviolet LEDs for germicidal applications.
[1] A. S. Toulouse, B. P. Isaacoff, G. Shi, M. Matuchov, E. Kioupakis, and R. Merlin, Phys. Rev. B 91, 165308 (2015).
[2] D. Bayerl and E. Kioupakis, Nano Lett. 14, 37093714 (2014).
ZBM Patents & Trademarks and the Institute of Electronic Structure and Laser / FORTH are organizing a seminar-workshop on International Patent Protection on 29.6.2015.
Session 1: 9:30-12:30
Patent Drafting Workshop
-Basic Information
-What to include
-What to avoid
-Optimum patent drafting strategies
-The role of a patent attorney firm - Example -Discussion
Session 2: 13:30-16:30
Patent strategies for Research Institutions -Patent assessment of generated knowledge (what to patent, valuation aspects)
-Patent application goals short-mid-long term (how many patent applications, building a patent portfolio, overall assessment of institute´s/ITE capability based on international statistics)
-Patent protection strategy (where to patent, cost-benefit analysis)
-Monetization strategy (what, when and how to offer patents in the IP market) with mediators or by direct marketing?
-The role of a patent attorney firm
-Discussion
Time:
12:00
Location:
Seminar Room 1, FORTHs bldg
Description:
IMBB SEMINAR
Tim DEVLING
Director of Sales & Applications
iThera Medical, Germany
Title: "Multispectral Optoacoustic Tomography (MSOT): A novel preclinical and clinical imaging modality for functional, anatomical and molecular imaging"