Arezoo Dianat

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The growth of single and multilayer graphene nanoflakes on MgO and ZrO 2 at low temperatures is shown through transmission electron microscopy. The graphene nanoflakes are ubiquitously anchored at step edges on MgO ͑100͒ surfaces. Density functional theory investigations on MgO ͑100͒ indicate C 2 H 2 decomposition and carbon adsorption at step-edges. Hence,(More)
The mechanical properties of graphene nanoribbons on Ni(111) surfaces with different contact sizes are investigated by means of density functional theory. For finite contact sizes, the stress behavior of graphene nanoribbons on metal electrodes is likely to be similar to that of suspended graphene, however the critical strain is not reached due to the(More)
Here we present electrochemically grown ultrathin 12 platinum nanowires and demonstrate that their morphology and 13 crystalline structure can be tuned by the waveform of the 14 alternating voltage applied to the microelectrodes. The structure 15 of the nanowires was analyzed by scanning and transmission 16 electron microscopy. The voltage signal, applied(More)
The segregation behavior of the bimetallic alloys PtPd and CoCr in the case of bare surfaces and in the presence of an oxygen ad-layer has been studied by means of first-principles modeling based on density-functional theory (DFT). For both systems, change of the d-band filling due to charge transfer between the alloy components, resulting in a shift of the(More)
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