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Related Concept Videos

Ferromagnetism01:31

Ferromagnetism

Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
Colors and Magnetism03:02

Colors and Magnetism

Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human eye.

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Related Experiment Video

Updated: Jun 4, 2026

Engineering Molecular Recognition with Bio-mimetic Polymers on Single Walled Carbon Nanotubes
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Confinement-Driven Redox Inversion and Predicted Ferromagnetism in One-Dimensional Sc3Cl8 within Single-Walled Carbon

Yuanfang Zhang1,2, Liping Ding3,4, Siran Yang2

  • 1Key Laboratory for Ultrafine Materials of the Ministry of Education and Shanghai Key Laboratory of Advanced Polymeric Materials, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China.

Nano Letters
|June 2, 2026
PubMed
Summary

Researchers synthesized a novel 1D scandium chloride (Sc3Cl8) phase within single-walled carbon nanotubes (SWCNTs). This confinement induces unique electronic and magnetic properties, creating a new material for carbon-based spintronics.

Keywords:
Single-walled carbon nanotubesn-type dopingone-dimensional halide chainsspin-polarized ground state

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Condensed Matter Physics

Background:

  • Single-walled carbon nanotubes (SWCNTs) serve as effective 1D nanoreactors for stabilizing reactive species and low-dimensional phases.
  • Bulk scandium chloride (ScCl3) is a diamagnetic material.

Purpose of the Study:

  • To synthesize and characterize a novel 1D Sc3Cl8 phase confined within SWCNTs.
  • To investigate the electronic and magnetic properties of this confined phase.
  • To explore its potential applications in carbon-based spintronics.

Main Methods:

  • Confinement-induced structural reconstruction of bulk ScCl3 within SWCNTs.
  • Aberration-corrected electron microscopy (HRTEM/STEM) for atomic structure determination.
  • Machine-learning force field (MLFF) global structure searches.
  • Spin-polarized density functional theory (DFT) calculations.

Main Results:

  • Successful synthesis of a 1D Sc3Cl8 phase encapsulated in SWCNTs (Sc3Cl8@SWCNT heterostructure).
  • Observation of 'redox inversion': Sc3Cl8 acts as an electron donor, inducing n-type doping in SWCNTs, contrary to typical halide fillers.
  • Prediction of a ferromagnetic ground state for the confined Sc3Cl8 chain, originating from a diamagnetic bulk precursor.

Conclusions:

  • Sc3Cl8@SWCNT heterostructures represent a model system where nanoscale confinement alters fundamental material properties.
  • Confinement leads to simultaneous inversion of doping polarity and emergence of magnetic behavior.
  • This work opens new avenues for designing advanced carbon-based spintronic devices.