National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
Tailoring of structure of plasma polymers
Krtouš, Zdeněk ; Kousal, Jaroslav (advisor) ; Matoušek, Jindřich (referee)
The thesis was targeted on the preparation of thin film plasma polymers with Plasma assisted vapour thermal deposition technique. As a characterised precursor was chosen the poly lactic acid because of its interesting biodegradable properties. The set of samples prepared with varying plasma power was obtained. It was found that the PLA structure is still preserved after repolymerisation, moreover, new carbon rich compound was formed. The strong changes of behaviour of samples in water were observed around plasma power of 30 W. The sample prepared in weaker plasma had properties of hydrogel. The samples prepared above 30 W of plasma power were solid and did not dissolve in water.
Temperature changes in thin films of nanoparticles
Krtouš, Zdeněk ; Kousal, Jaroslav (advisor) ; Hanuš, Jan (referee)
Many properties of nanoparticles are different from general bulk properties. This work is focused on coalescence of nanoparticles depending on temperature.Coalsescence was experimentaly measuered on gold nanoparticles, copper nanoparticles and silver nano- islands.The samples were characterised by SEM, AFM and in-situ ellipsometry in range between 20řC and 350 řC. In the theoretical part was analyzed existing semi-analytical model of coalescence and then it was created a new model based on previous one. In the end, the comparison between experimental data and model was done. New model predicts greater coalescence of nanoparticles, what corresponds to experimental data.

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