Stability of scanning tunneling microscopy tip-induced bimetallic nanoclusters: Influence of hardness and composition on the cohesive energies

Article Abstract:

The stability of bimetallic nanoclusters fabricated using scanning tunneling microscopy methods is investigated using a phenomenological formalism, and the cohesive energies of Au-Cu, Au-Pd, and Ag-Cu systems are estimated. The influence of chemical hardness, composition of the substrate, and metal adatoms in the nanocluster as well as the dissociation energies of S-S and S-M bonds as regards the stability of nanoclusters is demonstrated.

Usage, Copper, Scanning tunneling microscopy, Cohesion, Cohesion (Materials)

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Estimation of the orientation of heme in cytochrome c immobilized on a carboxylate-terminated alkanethiol monolayer on a Au Electrode by the use of electroreflectance spectroscopy with polarized light incidence

Article Abstract:

Electroreflectance (ER) spectroscopy is used for the estimation of the orientation of heme in a horse heart cytochrome c molecule immobilized on a self-assembled monolayer of 11-mercaptoundecanoic acid on both polycrystalline gold (AU) and single crystalline Au(111) electrodes. The result has revealed that the heme plane is near-vertical to the electrode surface.

Cytochrome c, Surface chemistry

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Dynamic meniscus growth at a scanning probe tip in contact with a gold substrate

Article Abstract:

Environmental scanning electron microscopy is used to investigate the dynamic meniscus growth at a cantilever in contact with a gold substrate. The meniscus is observed to take many minutes to reach an equilibrium state.

Chemical equilibrium, Substrates

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