Hyperspectral Raman imaging is used to visualize defects in polycrystalline graphene under ion bombardment, showing zero-dimensional and one-dimensional defects in grains and at grain boundaries, respectively, and preferential self-healing at the grain boundaries. ...
To check the first possibility, that is, pseudo-magnetic-field based mechanism, the dI/dV spectra in the present work were compared with Landau levels observed in monolayer graphene under magnetic fields18,19, as well as ones observed in graphene nanobubbles7. In a monolayer graphene sheet, ...
is invariant under perturbations by the magnetic field. 4 main lemmas first, let us introduce the following two-dimensional tight-binding hamiltonian $$\begin{aligned} q_{\lambda }(\phi ) := \frac{1}{3} \left( \begin{matrix} 0 &{}&{}\quad 1+\tau _0+\tau _1 \\ \left( 1 +\...
Valley polarization is one basic concept in valleytronic device applications. However, the coexistence of this scenario in graphene under the joint modulation of a realistic magnetic field and a strain has not been reported. Therefore, in this paper, we use the transfer-matrix method to illustrate...
In the case of metallic and ferromagnetic gates the associated electric and magnetic fields shift the graphene's Dirac cones in the energy and wavevector axis, respectively. In the case of the magnetic field, it also breaks a fundamental symmetry, specifically the time-reversal symmetry. Under ...
For GO/RGO-based composites, it has been demonstrated that addition of iron oxides can effectively enhance the containment removal in wastewater under external magnetic field [280], [281], [282], [283], [284], [285], [286], [287], [288], [289]. For example, the Fe3O4–RGO hybri...
We investigate the electronic density redistribution of rotated bilayer graphene under a perpendicular electric field, showing that the layers are actually coupled even for large angles. This layer-layer coupling is evidenced by the charge transfer on these structures as a function of the external vol...
f hyperlenses, which relies on the fact that the hyperbolic dispersion curve can amplify and support the propagation of the evanescent waves straightly along the normal direction of the layered structures and form two imaging spots at the output plane under the condition of Re( ∥) > 0, Re(...
Their multifunctional electrochemical device integrated on soft materials and serpentine design provides extremely conformal contact to the skin even under 20% tensile or compressive strains (Figure 6b). In addition, the GP-hybrids, consisting of a bilayer of Au mesh and gold-doped graphene, ...
(4-sulfonatophenyl)porphyrin, Fig.5a) for antipathogen PDT. It was already known that ZnO NP has the ability to inhibit the growth of different pathogenic bacteria under normal visible light. TSPP which is an anionic PS has low photoinactivation of Gram-negative bacteria such asE. coli. The ...