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Physical principles of transmission and scanning electron microscopy
BÍLÝ, Tomáš
This bachelor thesis focuses on the description of transmission and scanning electron microscopy. It describes physical principles and defects arising during image formation in electron microscopes as well as the methodology of adjustment. The basic parts of electron microscopes are looked into more closely herein with consideration to the lectures. Practical implementation is demonstrated on following microscopes JEOL: JEM-1010, JSM-7401F, JDM-6300.
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Gold chemical vapor generation by tetrahydroborate reduction for AAS: Radiotracer efficiency study and characterization of gold species
Musil, Stanislav ; Arslan, Y. ; Kratzer, Jan ; Vobecký, Miloslav ; Benada, Oldřich ; Matoušek, Tomáš ; Rychlovský, P. ; Ataman, O. Y. ; Dědina, Jiří
The main objective was to assess the generation efficiency in the optimized method of chemical vapor generation of gold by means of 198,199Au radioindicator. We also intended to characterize the volatile Au species formed by tetrahydroborate reduction.
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Strmé InAs/GaAs heteropřechody a velmi tenké kvantové jámy vypěstované pomocí MOVPE
Hulicius, Eduard ; Pacherová, Oliva ; Oswald, Jiří ; Hospodková, Alice ; Pangrác, Jiří ; Šimeček, Tomislav ; Melichar, Karel ; Petříček, Otto ; Chráska, T. ; Holý, V. ; Vávra, I. ; Ouattara, L.
We have found that the abruptness and symmetry on monoatomic scale is achievable with MOVPE technique as well. We are able to find only the periodicity in these structures while atomic resolution pictures give reliable thickness values.
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Initial stages of fatigue failure of polycrystalline materials
Man, Jiří ; Petrenec, Martin ; Obrtlík, Karel ; Polák, Jaroslav
Geometry of persistent slip markings (PSMs) formed during cyclic loading of polycrystalline stainless steels and superalloy was studied using atomic force microscopy (AFM) and high-resolution scanning electron microscopy (SEM-FEG). Internal dislocation structure was investigated using transmission electron microscopy (TEM). Persistent slip bands with dislocation structure corresponding to the cyclic strain localization were identified and correlated with PSMs observed on the specimen surface.
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