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Controlled structuring of self-assembled polystyrene microsphere arrays by two different plasma systems
Domonkos, Mária ; Ižák, Tibor ; Stolcova, L. ; Proška, J. ; Kromka, Alexander
In this study we present a successful manipulation of microspheres by reactive ion etching (RIE). A self-assembled monolayer close-packed array of monodisperse polystyrene microspheres (PM) with diameter of 471 nm was used as the primary template. The PM templates were processed in two different RIE systems: (i) capacitively coupled radiofrequency plasma (CCP) and (ii) dual plasma system which combines CCP and pulsed linear-antenna microwave plasma (PLAMWP). The influence of process conditions on the PM geometry was systematically studied by scanning electron microscopy (SEM). It was found out that choosing optimal parameters results in a tunable diameter of PM with various shapes (from spheres to pyramid-like structures) while keeping their periodic hexagonal ordering.
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Controlled structuring of self–assembled polystyrene microsphere arrays by two different plasma systems
Domonkos, Mária ; Ižák, Tibor ; Štolcová, L. ; Proška, J. ; Kromka, Alexander
In this study we present a successful manipulation of microspheres by reactive ion etching (RIE). A self-assembled monolayer close-packed array of monodisperse polystyrene microspheres (PM) with diameter of 471 nm was used as the primary template. The PM templates were processed in two different RIE systems: (i) capacitively coupled radiofrequency plasma (CCP) and (ii) dual plasma system which combines CCP and pulsed linear-antenna microwave plasma (PLAMWP). The influence of process conditions on the PM geometry was systematically studied by scanning electron microscopy (SEM). The process conditions were controlled by varying radiofrequency (RF) power, gas mixture (O2:CF4 ratio) and process duration.
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Reactive ion etching of polystyrene microspheres
Domonkos, Mária ; Ižák, Tibor ; Štolcová, L. ; Proška, J. ; Kromka, Alexander
This article gives a brief insight also into the principle of the nanosphere lithography and various plasma systems focusing on their properties and applicability for a subsequent topographical modification of surfaces prepared by NS lithography. In the experimental part of this study we present a successful manipulation of microspheres by reactive ion etching (RIE). A self-assembled monolayer close-packed array of monodisperse polystyrene microspheres is used as the primary template. The polystyrene microspheres (PM) were processed in capacitively coupled radiofrequency plasma (CCP) RIE system. The influence of process conditions on the PM geometry is systematically studied by scanning electron microscopy. The process conditions are controlled by varying radiofrequency power, total pressure, composition of the gas mixture (ratio O2:CF4) and process duration.
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Drawning as manner of tradition knowing ? Christmastime (pre-school age)
ŠIMKOVÁ ŠTOLCOVÁ, Lenka
Thesis is dedicated on drawing pre-school age children and its importance and application for traditions recognizing, especially at Christmastime. Thesis has two parts, theoretical and practical part. Theoretic part is focused on explanation of some terms as drawing and its importance at pre-school age, explaining creativity as the most important factor which influences art activity and its necessity for development. This part also defines pre-school age and its development. Afterwards the first part is focused on traditions and their aspects in human life, their connection with season inducing theme of Christmastime for children art creativity. Practical part is focused on motivation as majority and then realizing art creativity on the topic Cristmas Eve in cribs (Belen). Kindergarden-age childern were motivated by reading children books, biblic story, playing, singing and performing. Asignment was done with rules of right leading art creativity. Thesis ends with examples of children´s drawings and a list of questions answered by children for final evalution in time distance.
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