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Elastic properties of chemically derived single graphene sheets.
The elastic modulus of freely suspended graphene monolayers, obtained via chemical reduction of graphene oxide, was determined through tip-induced deformation experiments, pointing toward a 2-fold role of the oxygen bridges, that is, to impart a bond reinforcement while at the same time impeding the charge transport.
Engineering atomic and molecular nanostructures at surfaces
This work presents an autonomous ordering and assembly of atoms and molecules on atomically well-defined surfaces that combines ease of fabrication with exquisite control over the shape, composition and mesoscale organization of the surface structures formed.
Electronic transport properties of individual chemically reduced graphene oxide sheets.
Comparison of multilayered sheets revealed that the conductivity of the undermost layer is reduced by a factor of more than 2 as a consequence of the interaction with the Si/SiO2 substrate.
Giant Magnetic Anisotropy of Single Cobalt Atoms and Nanoparticles
The isotropic magnetic moment of a free atom is shown to develop giant magnetic anisotropy energy due to symmetry reduction at an atomically ordered surface and the results confirm theoretical predictions and are of fundamental value to understanding how magnetic an isotropy develops in finite-sized magnetic particles.
Ferromagnetism in one-dimensional monatomic metal chains
Evidence is found that the monatomic chains consist of thermally fluctuating segments of ferromagnetically coupled atoms which, below a threshold temperature, evolve into a ferromagnetic long-range-ordered state owing to the presence of anisotropy barriers.
Contact and edge effects in graphene devices.
Scanning photocurrent microscopy is used to explore the impact of electrical contacts and sheet edges on charge transport through graphene devices and finds that the transition from the p- to n-type regime induced by electrostatic gating does not occur homogeneously within the sheets.
Scanning field emission from patterned carbon nanotube films
The investigation of the field emission (FE) properties of carbon nanotube (CNT) films by a scanning anode FE apparatus, reveals a strong dependence on the density and morphology of the CNT deposit.
Atomic structure of reduced graphene oxide.
The layers are found to comprise defect-free graphene areas with sizes of a few nanometers interspersed with defect areas dominated by clustered pentagons and heptagons, which makes all carbon atoms in these defective areas undetectable by spectroscopic techniques.
Giant spin splitting through surface alloying.
The long-range ordered surface alloy Bi/Ag(111) is found to exhibit a giant spin splitting of its surface electronic structure due to spin-orbit coupling, as is determined by angle-resolved
Self-organized growth of nanostructure arrays on strain-relief patterns
The physical and chemical properties of low-dimensional structures depend on their size and shape, and can be very different from those of bulk matter. If such structures have at least one dimension