Hikmet Sezen | Elettra- Sincrotrone Trieste (original) (raw)

Hikmet Sezen

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articles by Hikmet Sezen

Research paper thumbnail of Probing the Charge Build‐Up and Dissipation on Thin PMMA Film Surfaces at the Molecular Level by XPS

Research paper thumbnail of Chemical activity of oxygen vacancies on ceria: a combined experimental and theoretical study on CeO 2 (111)

Research paper thumbnail of Tunable coordinative defects in UHM-3 surface-mounted MOFs for gas adsorption and separation: A combined experimental and theoretical study

Research paper thumbnail of Charge storage and release onto Au and Ag nanoparticles in aqueous medium as probed by optical spectroscopy

Research paper thumbnail of Optical response of Ag-Au bimetallic nanoparticles to electron storage in aqueous medium

Research paper thumbnail of Surface Oxidation of Bi2 (Te, Se) 3 Topological Insulators Depends on Cleavage Accuracy

Research paper thumbnail of Hydrogen behavior in Al Cr alloys: Synchrotron-based photoelectron microscopy of the rapidly solidified structure

Research paper thumbnail of XPS measurements for probing dynamics of charging

Research paper thumbnail of Two-dimensional X-ray photoelectron spectroscopy for composite surface analysis

Research paper thumbnail of XPS for chemical-and charge-sensitive analyses

Research paper thumbnail of Probing Dynamics of Surface Structures Using X-Ray Photoelectron Spectroscopy

Research paper thumbnail of Communication: Enhancement of dopant dependent x-ray photoelectron spectroscopy peak shifts of Si by surface photovoltage

Research paper thumbnail of Dynamical XPS measurements for probing photoinduced voltage changes

Research paper thumbnail of Charging/discharging dynamics of CdS and CdSe films under photoillumination using dynamic x-ray photoelectron spectroscopy

Research paper thumbnail of Evidence for photogenerated intermediate hole polarons in ZnO

Research paper thumbnail of Corrigendum: Evidence for photogenerated intermediate hole polarons in ZnO

Research paper thumbnail of XPS Investigation of a CdS-Based Photoresistor under Working Conditions: Operando–XPS

Research paper thumbnail of XPS for probing the dynamics of surface voltage and photovoltage in GaN

Research paper thumbnail of Transient surface photovoltage in n-and p-GaN as probed by x-ray photoelectron spectroscopy

Research paper thumbnail of Methods for probing charging properties of polymeric materials using XPS

Research paper thumbnail of Photo-dynamic XPS for investigating photoinduced voltage changes in semiconducting materials

Research paper thumbnail of Investigation of electrical charging/discharging properties of thin PS/PMMA polymetric films by dynamic X-Ray photoelectron spectroscopy

Electrical charging/discharging properties of thin layers of spin coated pure PS polystyrene (PS)... more Electrical charging/discharging properties of thin layers of spin coated pure PS polystyrene (PS), and pure poly(methyl methacrylate), (PMMA) and an immiscible PS/PMMA blend are studied with externally applied DC and dynamic(squarewave stress) X-Ray Photoelectron Spectroscopy (XPS). PS and PMMA exhibit quite different charging properties under DC stress. Due to the different charging properties of PS and PMMA domains within an immiscible PS/PMMA blend film, charge contrast or phase separation is clearly observed between domains.

Research paper thumbnail of Investigation on Electrical Charging/Discharging Properties of Thin PS/PMMA Polymeric Films by Dynamic X-Ray Photoelectron Spectroscopy

Electrical charging/discharging properties of thin layers of spin coated pure PS polystyrene (PS)... more Electrical charging/discharging properties of thin layers of spin coated pure PS polystyrene (PS), and pure poly(methyl methacrylate), (PMMA) and an immiscible PS/PMMA blend are studied with externally applied DC and dynamic(squarewave stress) X-Ray Photoelectron Spectroscopy (XPS). PS and PMMA exhibit quite different charging properties under DC stress. Due to the different charging properties of PS and PMMA domains within an immiscible PS/PMMA blend film, charge contrast or phase separation is clearly observed between domains. Electrical parameters of PS and PMMA thin films while employing a squarewave pulse stress in a 10-3 - 103 Hz range of frequency are probed by dynamic XPS. A model, which can simulate the dynamical XPS measurements, is shown to lead to obtain effective resistance and capacitance values for each polymer. RC time constants and inflection points(frequency) are also determined. Moreover, thickness also affects the charging/discharging properties and other electri...

Research paper thumbnail of Carbon materials for the positive electrode in all-vanadium redox flow batteries

Carbon, 2014

The electrode material in all-vanadium redox flow batteries often consists of fibrous carbon felt... more The electrode material in all-vanadium redox flow batteries often consists of fibrous carbon felts. It is believed that surface functional groups such as carboxyl and hydroxyl groups, e.g.

Research paper thumbnail of Chemical activity of oxygen vacancies on ceria: a combined experimental and theoretical study on CeO2(111)

Physical chemistry chemical physics : PCCP, Jan 28, 2014

The chemical activity of oxygen vacancies on well-defined, single-crystal CeO2(111)-surfaces is i... more The chemical activity of oxygen vacancies on well-defined, single-crystal CeO2(111)-surfaces is investigated using CO as a probe molecule. Since no previous measurements are available, the assignment of the CO ν1 stretch frequency as determined by IR-spectroscopy for the stoichiometric and defective surfaces are aided by ab initio electronic structure calculations using density functional theory (DFT).

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