english

EN Molecular electronics proposes to use single molecules as functional units within larger circuits. As a possible switch the cis-trans isomerization of azobenzene derivative stimulated mostly by electrons and by photons has been extensively studied. On surfaces, this molecule class was mostly investigated on Au(111) because it is known to weakly interact with adsorbed molecules. However, electronic industry is based on semiconductor monocrystalline surfaces, in particular Si(100), which interact more strongly with molecules. Therefore thinking about incorporating molecular switches into devices we must find molecules which can act as a switch on silicon. In this thesis, I show the properties of 4-anilino-4'-nitroazobenzene molecules. I compare the adsorption configurations of the molecules adsorbed on the Cu(111) and Si(100). I show the evidence of isomerization reactions of single adsorbed molecules on both surfaces and discuss the differences in isomerisation capabilities of adsorbed molecules arising from interactions between the molecules and the substrates.

120

DrOIN 1364

to201258949

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Bronisław Susła

Marek Szymoński

dissertation

Poznań, Polska

14.12.2011

Rada Wydziału Fizyki Technicznej Politechniki Poznańskiej

doktor nauk fizycznych w dyscyplinie: fizyka