Original title: Studium adsorpce a pohyblivosti molekul ftalocyaninů na pasivovaném povrchu křemíku při snížené teplotě pomocí STM
Translated title: STM study of adsorption and mobility of phtalocyanine molecules on passivated silicon surfaces at lower temperatures
Authors: Szabo, Michal ; Ošťádal, Ivan (advisor) ; Matvija, Peter (referee)
Document type: Bachelor's theses
Year: 2019
Language: slo
Abstract: [eng] [cze]
The thesis deals with an experiment for studying adsorption of phthalocyanin molecules on silicon surface passivated by a tin reconstruction. The main technique used for imaging surface is scanning tunneling microscopy (STM). The work contains a brief introduction to the studied problem. It deals with the STM method and STM construction. The used ultra-vacuum experimental system is characterized together with particular steps at sample preparation for STM measurements. During the sample preparation all necessary operations were tested on the newly modified system and calibration measurements of sample annealing and tin deposition were performed. A structure of the prepared surface Si(111) 7×7 was investigated by STM and conditions for the preparation in the new system were specified. STM images were used for an evaluation of results at optimizing preparation of the passivated surface. Obtained results are important for further experiments in frame of a research focused on growing molecular structures on silicon surfaces. Práca sa zaoberá prípravou experimentu pre štúdium adsorpcie molekúl ftalocyanínu na povrchu kremíka pasivovaného cínovou rekonštrukciou. Hlavnou používanou experimentálnou technikou je zobrazovanie povrchu skenovacím tunelovým mikroskopom (STM). Okrem úvodu do študovanej problematiky sa práca venuje metóde a konštrukcii STM, charakteristike experimentálneho ultravakuového (UHV) systému a jednotlivým krokom pri príprave vzoriek pre meranie v STM. V rámci prípravy vzoriek boli prvýkrát na inovovanom zariadení testované všetky potrebné operácie, prevedené kalibrácie žíhania kremíkového substrátu a depozičnej rýchlosti. Pomocou STM bola skúmaná štruktúra povrchu Si(111) 7×7 a spresnené podmienky pre prípravu v novom systéme. Pomocou STM boli vyhodnotené výsledky pri optimalizácii prípravy pasivovaného povrchu. Získané výsledky sú dôležité pre pokračovanie experimentov v rámci výskumu v oblasti prípravy molekulárnych štruktúr na povrchu kremíka.
Keywords: adsorption; phthalocyanine; reconstruction Si(111)-Sn(√3×√3) R30°; STM; Surface Si(111)7×7; vakuum evaporation; adsorpcia; ftalocyanín; Povrch Si(111)7×7; rekonštrukcia Si(111)-Sn(√3×√3) R30°; STM; vakuové naparovanie

Institution: Charles University Faculties (theses) (web)
Document availability information: Available in the Charles University Digital Repository.
Original record: http://hdl.handle.net/20.500.11956/109979

Permalink: http://www.nusl.cz/ntk/nusl-405975


The record appears in these collections:
Universities and colleges > Public universities > Charles University > Charles University Faculties (theses)
Academic theses (ETDs) > Bachelor's theses