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Spin–Spin Coupling: One-Bond Coupling

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Coupling interactions are strongest between NMR-active nuclei bonded to each other, where spin information can be transmitted directly through the pair of bonding electrons. While nuclei polarize their electrons to the opposite spins, the bonding electron pair has opposite spins. Configurations with antiparallel nuclear spins are expected to be lower in energy. When coupling makes antiparallel states more favorable, J is considered to have a positive value. The one-bond coupling constant, 1J,...

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Updated: Jun 20, 2026

Simultaneous Synthesis of Single-walled Carbon Nanotubes and Graphene in a Magnetically-enhanced Arc Plasma

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Published on: February 2, 2012

Spin channels in functionalized graphene nanoribbons.

Giovanni Cantele¹, Young-Su Lee, Domenico Ninno

¹Coherentia CNR-INFM and Universita di Napoli Federico II, Dipartimento di Scienze Fisiche, Complesso Universitario Monte Sant'Angelo, Via Cintia, I-80126 Napoli, Italy. Giovanni.Cantele@na.infn.it

|September 8, 2009

Summary

This summary is machine-generated.

Functionalized graphene nanoribbons maintain edge conductivity despite chemical changes. Bulk channels are sensitive to defects, enabling near-unity spin polarization for spintronic devices.

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Functionalization of Single-walled Carbon Nanotubes with Thermo-reversible Block Copolymers and Characterization by Small-angle Neutron Scattering

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Published on: June 1, 2016

Area of Science:

Materials Science
Condensed Matter Physics
Nanotechnology

Background:

Graphene nanoribbons (GNRs) are promising for electronics.
Understanding their transport properties under various conditions is crucial for device applications.
Chemical functionalization and defects significantly influence GNR behavior.

Purpose of the Study:

To investigate the impact of functionalization and defects on GNR transport properties.
To explore the preservation of edge metallic states in different chemical environments.
To assess the potential for achieving high spin polarization in GNR-based devices.

Main Methods:

Extensive first-principles calculations using density functional theory (DFT).
Simulation of monovalent and divalent ligands, hydrogenated defects, and vacancies.
Analysis of electronic structure and transport properties.

Main Results:

Edge metallic states in GNRs are robust across diverse chemical environments.
Bulk conducting channels are susceptible to degradation from hydrogenation and irradiation.
Defect-induced changes facilitate spin conductance polarization approaching unity.

Conclusions:

GNR edge states offer stability for spintronic applications.
Controlled defect engineering can tune GNR conductivity for spin-selective transport.
These findings pave the way for novel GNR-based spintronic devices.