Results 21 to 30 of about 1,270 (155)
Single-Acetylene Linked Porphyrin Nanorings [PDF]
Journal of the American Chemical Society, 2017 The synthesis of ethyne-linked porphyrin nanorings has been achieved by template-directed Sonogashira coupling. The cyclic hexamer and octamer are predicted by density functional theory to adopt low symmetry conformations, due to dihedral twists between neighboring porphyrin units, but their symmetries are effectively D6h and D8h, respectively, in ...
Michel Rickhaus +6 more
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Charge–Phase Duality and Cotunneling of Fluxons in SQUID-like Nanorings
Condensed Matter, 2022 Employing charge–flux duality for Josephson junctions and superconducting nanowires, we predict a novel effect of fluxon cotunneling in SQUID-like nanorings.
Alex Latyshev +2 more
doaj +1 more source
Persistent Current in Superconducting Nanorings [PDF]
Physical Review Letters, 2002 5 pages, 1 ...
Matveev, K. A. +2 more
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Advanced Energy & Sustainability Research, 2023 High overpotential and poor long‐term operation stability of electrocatalysts are two major barriers for the hydrogen evolution reaction (HER). Herein, 2D ultrathin PdAgAu nanorings are synthesized and further self‐assembled on Ti2CTx–graphene oxide (GO)
Chaohai Sun +5 more
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Optical Properties of Gold Nanorings [PDF]
Physical Review Letters, 2003 The optical response of ring-shaped gold nanoparticles prepared by colloidal lithography is investigated. Compared to solid gold particles of similar size, nanorings exhibit a redshifted localized surface plasmon that can be tuned over an extended wavelength range by varying the ratio of the ring thickness to its radius.
Aizpurua, Javier +5 more
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Frontiers in Energy Research, 2020 A new ringlike V2O3 architecture was successfully synthesized by a template-free hydrothermal method, and the sulfur ions-assisted central-etching mechanism of the ringlike structure was proposed.
Ning Wang +3 more
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Core-shell Fe@FexOy nanoring system: A versatile platform for biomedical applications
Materials & Design, 2022 Iron oxide (maghemite and magnetite) nanoparticles are the most commonly used magnetic materials in nanomedicine because of their high biocompatibility. However, their low saturation magnetization (60–90 emu/g) limits their applicability. Here, we report
Bianca M. Galeano-Villar +8 more
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One-Pot Synthesis of Cycloparaphenylenes
Organic Materials, 2020 The preparation of cycloparaphenylenes ([n]CPPs) with their bent π-system poses a long-standing challenge in organic synthesis. In the current multi-step approaches to access CPPs, pre-angulated precursors were combined using transition metal-catalysed ...
Jan H. Griwatz, Hermann A. Wegner
doaj +1 more source
Semiconductor nanoring lasers [PDF]
Applied Physics Letters, 2011 Lasing in a subwavelength metal-clad nanoring resonator has been demonstrated with a tunable emission wavelength, controlled by the width of the ring. The emission wavelength is shown to be tunable within a 10 nm wavelength range by changing the ring width between 240 and 340 nm.
Kim, Min W., Ku, P.-C.
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Strained Porphyrin Tape–Cycloparaphenylene Hybrid Nanorings
Organic Letters, 2022 V-shaped porphyrin dimers, with masked para-phenylene bridges, undergo efficient oxidative coupling to form meso-meso linked cyclic porphyrin oligomers. Reductive aromatization unmasks the para-phenylenes, increasing the strain. Oxidation then fuses the porphyrin dimers, providing a nanoring with curved walls.
Stawski, Wojciech +5 more
openaire +4 more sources