The Synchrotron Radiation Induced Chemistry of the Adamantane/Si(111)-7×7 Surface

Abstract

The synchrotron radiation (SR) induced photochemistry of adamantane adsorbed on Si(111)-7×7 surfaces has been studied using photoemission spectroscopy (PES) and photon stimulated desorption (PSD). The clean Si subtrates were first dosed with adamantane at a temperature of 85 K, then exposed to broadband SR with the temperature held at 85 K, and finally flash annealed to 525 K. When annealed, the unexposed adlayer dissociated forming predominantly hydrated Si-C species. When the adlayer was exposed to high energy (hv>284 eV) broadband SR, the adamantane layer again dissociated but reacted with the surface to form a layer similar to SiC. However, when the surface was exposed to low energy broadband SR, 1-adamantanyl radicals were generated which in turn reacted with the surface to form adamantyl-Si species. The adamantyl-Si reactants were stable up to temperatures of at least 525 K.KeywordsElectron Spin ResonanceSynchrotron RadiationDiamond FilmPhotoemission SpectrumValence Band SpectrumThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.