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To study the mechanism of nano-hole formation on agold surface, with scanning tunnelling microscope (STM), our entire scanning unit was placed in aairtight box. Nano-hole formation is sensitive to the chemical environment. Different atmospheres (O2, CO2, H2O or C2H5OH mixed with nitrogen gas; H2Ar2 mixture) were applied in this study. Only the presence of ethanol vapour or water vapour helped to produce...
The step periodicity of GaAs vicinal surfaces, grown by molecular beam epitaxy (MBE) was studied for alarge range of misorientation (0.2 to 2 towards <111>) using ex-situ atomic force microscopy (AFM) under dry nitrogen gas. After growth, the statistical distribution of the terrace width and the correlation length along the steps were consistent with athermodynamic equilibrium model taking into...
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