Electron and X-Ray Spectroscopy Techniques

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• MEHMET KADRİ AYDINOL

The initial oxidation stages of perfect and defective graphitic surfaces exposed to atomic oxygen have been studied with a combined high-resolution photoemission spectroscopy (HR-PES) and density functional theory (DFT) computational approach. The resulting oxygen-containing surface functional groups are identified by…

• OSMAN BARIŞ MALCIOĞLU

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• MEHMET KADRİ AYDINOL

Distributions and atomic sites of transition metals and gold on suspended graphene were investigated via high-resolution scanning transmission electron microscopy, especially using atomic resolution high angle dark field imaging. All metals, albeit as singular atoms or atom aggregates, reside in the omni-present hydro…

• RECEP ZAN

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• SARP KAYA

Atomic resolution high angle annular dark field imaging of suspended, single-layer graphene, onto which the metals Cr, Ti, Pd, Ni, Al, and Au atoms had been deposited, was carried out in an aberration-corrected scanning transmission electron microscope. In combination with electron energy loss spectroscopy, employed t…

• RECEP ZAN

We demonstrate that 60-keV electron irradiation drives the diffusion of threefold-coordinated Si dopants in graphene by one lattice site at a time. First principles simulations reveal that each step is caused by an electron impact on a C atom next to the dopant. Although the atomic motion happens below our experimenta…

• RECEP ZAN

Thermally grown SiO 2 layers on Si (100) substrate have been subjected to different external voltage bias during XPS analysis to induce changes in the measured binding energy difference between Si 4+ and Si 0 in Si2p and Si KLL regions. The Si2p binding energy difference increases from 3.2 to 4.8 for samples containin…

• ŞEFİK SÜZER

Thermally grown SiO 2 layers on Si (100) substrate have been subjected to different external voltage bias during XPS analysis to induce changes in the measured binding energy difference between Si 4+ and Si 0 in Si2p and Si KLL regions. The Si2p binding energy difference increases from 3.2 to 4.8 for samples containin…

• BURAK ÜLGÜT

HIPPIE is a soft X-ray beamline on the 3 GeV electron storage ring of the MAX IV Laboratory, equipped with a novel ambient-pressure X-ray photoelectron spectroscopy (APXPS) instrument. The endstation is dedicated to performing in situ and operando X-ray photoelectron spectroscopy experiments in the presence of a contr…

• SARP KAYA

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• SARP KAYA

We report a measurement of the parity-violating asymmetry in fixed target electron-electron (M\o{}ller) scattering: ${A}_{\mathrm{PV}}=[\ensuremath{-}175\ifmmode\pm\else\textpm\fi{}30(\mathrm{stat})\ifmmode\pm\else\textpm\fi{}20(\mathrm{syst})]\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}9}$. This first direc…

• BARIŞ TAMER TONGUÇ