Articles with "ring structures" as a keyword



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The influence of hydrogen on transition metal - Catalysed graphene nucleation

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Published in 2018 at "Carbon"

DOI: 10.1016/j.carbon.2017.11.048

Abstract: Abstract We demonstrate how hydrogen influences graphene nucleation on two archetypal catalysts, Cu(111) and Ni(111), using first-principles methods. The graphene nucleation mechanism is shown to be the result of the balance between the nature and… read more here.

Keywords: ring structures; carbon; graphene nucleation; hydrogen ... See more keywords

Enantioselective Radical Cyclization for Construction of 5-Membered Ring Structures by Metalloradical C-H Alkylation.

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Published in 2018 at "Journal of the American Chemical Society"

DOI: 10.1021/jacs.8b01662

Abstract: Radical cyclization represents a powerful strategy for construction of ring structures. Traditional radical cyclization, which is based on radical addition as the key step, necessitates the use of unsaturated substrates. Guided by the concept of… read more here.

Keywords: ring structures; construction; radical cyclization; enantioselective radical ... See more keywords

Structural Identification of Eicosanoids with Ring Structures Using Differential Mobility Spectrometry-Electron Impact Excitation of Ions from Organics Mass Spectrometry.

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Published in 2022 at "Journal of the American Society for Mass Spectrometry"

DOI: 10.1021/jasms.2c00256

Abstract: We developed a structural identification method for eicosanoids with various ring structures using mass spectrometry. We discovered that an electron beam with a kinetic energy of 10 eV, which is in the Electron Impact Excitation… read more here.

Keywords: ring structures; mass spectrometry; electron impact; spectrometry ... See more keywords

Optimization of Guard Ring Structures for Superior Dark Current Reduction and Improved Quantum Efficiency in InGaAs/InP APDs

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Published in 2025 at "IEEE Journal of the Electron Devices Society"

DOI: 10.1109/jeds.2025.3583669

Abstract: Avalanche photodiodes (APDs) based on InGaAs/InP are pivotal for applications in low-light detection, yet their performance is often hindered by edge breakdown and high dark currents. This study systematically optimizes guard ring structures to address… read more here.

Keywords: ring structures; dark current; ingaas inp; guard ring ... See more keywords

Outcrop‐Scale, Ring Structures Discovered in Northwestern Kyushu, Japan

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Published in 2025 at "Island Arc"

DOI: 10.1111/iar.70011

Abstract: Two, outcrop‐scale, basaltic, ring structures were discovered in Oligocene sandstone on an abrasion platform in northwestern Kyushu, Japan. This paper aims to report their occurrence and discuss their formation mechanisms. When viewed from above, they… read more here.

Keywords: sheet; outcrop scale; northwestern kyushu; ring structures ... See more keywords