Results 31 to 40 of about 1,331 (176)

Plasmonic Thermal Conductance of Stack of Metallic Nanorings [PDF]

open access: yesJournal of Sciences, Islamic Republic of Iran, 2010
In this paper, we study the plasmonic thermal conductance of ordered stacks of metallic nanorings in a host material. Using second quantized formalism of the Random Phase Approximation, we first determine the dispersion relations of surface plasmon waves
M Jafari
doaj  

Disentangling the electronic structure of an adsorbed graphene nanoring by scanning tunneling microscopy

open access: yesCommunications Materials, 2022
Scanning tunneling microscopy is a powerful tool for determining the electronic structure of surface adsorbates. Here, carbon monoxide functionalized tips enable more accurate probing of the molecular states of graphene nanorings adsorbed on a gold ...
Jose Martinez-Castro   +11 more
doaj   +1 more source

Complex-Morphology Metal-Based Nanostructures: Fabrication, Characterization, and Applications

open access: yesNanomaterials, 2016
Due to their peculiar qualities, metal-based nanostructures have been extensively used in applications such as catalysis, electronics, photography, and information storage, among others.
Antonella Gentile   +2 more
doaj   +1 more source

Lasing Actions in GaN Tiny Hexagonal Nanoring Resonators

open access: yesIEEE Photonics Journal, 2010
We achieved optically pumped lasing actions of extremely small optical resonators, which have 1.4-2-μm-diameter GaN hexagonal nanorings with wall widths of 60-140 nm.
Tetsuya Kouno   +3 more
doaj   +1 more source

A Triple-Band Hybridization Coherent Perfect Absorber Based on Graphene Metamaterial

open access: yesApplied Sciences, 2020
In this paper, a triple-band hybridization coherent perfect absorber based on graphene metamaterial is proposed, which consists of graphene concentric nanorings with different sizes and a metallic mirror separated by SiO2 layer.
Xinpeng Jiang   +5 more
doaj   +1 more source

Effect of nonuniform perpendicular anisotropy in ferromagnetic resonance spectra in magnetic nanorings

open access: yesScientific Reports, 2021
The high frequency dynamic behaviors of magnetic nanorings with variable anisotropy along their radius have been studied using micromagnetic simulations.
E. Saavedra, A. Riveros, J. L. Palma
doaj   +1 more source

Synthesis of Monolayer Gold Nanorings Sandwich Film and Its Higher Surface-Enhanced Raman Scattering Intensity

open access: yesNanomaterials, 2020
Most previous studies relating to surface-enhanced Raman spectroscopy (SERS) signal enhancement were focused on the interaction between the light and the substrate in the x-y axis.
Liqiu Zhang   +6 more
doaj   +1 more source

Nanowires and Nanorings at the Atomic Level [PDF]

open access: yesPhysical Review Letters, 2003
The step-flow growth mode is used to fabricate Si and Ge nanowires with a width of 3.5 nm and a thickness of one atomic layer (0.3 nm) by self-assembly. Alternating deposition of Ge and Si results in the formation of a nanowire superlattice covering the whole surface.
Kawamura, M.   +3 more
openaire   +3 more sources

Perfluorocycloparaphenylenes

open access: yesNature Communications, 2022
Synthetic methods for the preparation of perfluorinated aromatic compounds are desirable in materials science. Here, the authors synthesize perfluorocycloparaphenylenes, fully fluorinated carbon nanorings, through a nickel-mediated one-pot method.
Hiroki Shudo   +9 more
doaj   +1 more source

Colloidal lead iodide nanorings

open access: yesNanoscale, 2018
We present the synthesis and characterization of PbI 2 nanorings prepared via a direct colloidal route. The ring structures are obtained by etching as prepared PbI 2 nanosheets with trioctylphosphine and possess ...
Eugen Klein   +4 more
openaire   +7 more sources

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