Main studies carried out during this month:

- characterization of new melt spun ribbons: microstructure studies using SEM, phase composition analysis using XRD, DSC, preliminary investigation of thin foils using TEM

- participation in QEM 2013, Saint Aygulf, France

I ran some simulations in the FDTD Solutions. The program was used to test the reflectivity from the silicon surface due to the different surface structures constructed in this program. Also I examined the pits distribition after acidic texturization. Distribution curve which maximum is shifted toward smaller pits size (distribution with a tail) gives the highest reflection reduction.
I was participate on two conferences: IV Symposium Photovoltaics and Transparent Electronics - Perspectives of Developement (second place for the best speech) and EMSR in Strasbourg.

Modified matching program schedule features the experimental X-ray peaks. It was found that different types of distributions, by their different nature, can result in a variable position of the peak, which is a key parameter for us. Therefore, the decision was made to one type of decomposition - Pearson distribution in three different variations of parameter power series. If the need arises also will adjust the program doubled peak (peak Kbeta part). This was followed by the traditional method of measuring stress traditional sin ² Ψ at Phi = 0 and 90, and Psi from zero to 75 at 7.5 and assigned to each designated decay fit certain weight to the data and prepared charts sin ² Ψ by taking into account the importance of each point.
Then we written a function that takes arguments crystallographic lattice parameters - default for Mg, h, k, l plane, phi, chi goniometer, i, j, k, l, tensor - the coordinates of the elastic susceptibility tensor element and the same tensor. This function prints a list: the Eulerization angles, rotation matrix around the diffraction vector of iterated angle sensor, ijkl-th element of rotated tensor. Using this feature allows you to write to the plane crystallographic data fi Chi and all the necessary components 33ij of rotated tensor with Euler angles. On the basis of these data and the values of the orientation distribution function was calculated diffraction elastic constants, weighing just rotated tensor orientation distribution function.

In May I have returned to AA7475/AlN nano-composites produced via powder metallurgy route and tried to develop a proper heat treatment for these materials. I started with a conventional heat treatment, characteristic for the matrix alloy, which is the T6 heat treatment (solution heat treatment + artificial ageing) and then moved to RRA (T6 treatment + retrogression and re-ageing) heat treatment and its variants.

Lately I have been on scientific internship in Institute of Catalysis and Surface Chemistry. During the internship I refined the annealing process of thin silver flms. I found apropriate resistance tube furnace.

I performed photochemical deposition on large area using Xenon lamp. I obtained particles size change from 60 to 80 nm with increased illumination time.
Thorough experiment with various concentration and time is planned on September.

I have learned new faster method of preliminary surface modification based on bath in 2:1 mixture of sulfuric acid and hydrogenperyoxide. Experiment were performed with 70nm silver nanoparticles. Good particles concentration was obtained but many aggregats occured.
In future I plan to compare this two typer of preliminary modifications.