Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Valence Bond Theory02:42

Valence Bond Theory

11.1K
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
11.1K
¹H NMR: Interpreting Distorted and Overlapping Signals01:02

¹H NMR: Interpreting Distorted and Overlapping Signals

1.4K
Spin systems where the difference in chemical shifts of the coupled nuclei is greater than ten times J are called first-order spin systems. These nuclei are weakly coupled, and their chemical shifts and coupling constant can generally be estimated from the well-separated signals in the spectrum.
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are...
1.4K
Atomic Nuclei: Nuclear Spin State Overview01:03

Atomic Nuclei: Nuclear Spin State Overview

1.9K
NMR-active nuclei have energy levels called 'spin states' that are associated with the orientations of their nuclear magnetic moments. In the absence of a magnetic field, the nuclear magnetic moments are randomly oriented, and the spin states are degenerate. When an external magnetic field is applied, the spin states have only 2 + 1 orientations available to them. A proton with = ½ has two available orientations. Similarly, for a quadrupolar nucleus with a nuclear spin value of one, the...
1.9K
Spin–Spin Coupling: One-Bond Coupling01:17

Spin–Spin Coupling: One-Bond Coupling

1.4K
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,...
1.4K
NMR Spectroscopy: Spin–Spin Coupling01:08

NMR Spectroscopy: Spin–Spin Coupling

2.9K
The spin state of an NMR-active nucleus can have a slight effect on its immediate electronic environment. This effect propagates through the intervening bonds and affects the electronic environments of NMR-active nuclei up to three bonds away; occasionally, even farther. This phenomenon is called spin–spin coupling or J-coupling. Coupling interactions are mutual and result in small changes in the absorption frequencies of both nuclei involved. While nuclei of the same element are involved...
2.9K
Spin–Spin Coupling Constant: Overview01:08

Spin–Spin Coupling Constant: Overview

1.4K
In bromoethane, the three methyl protons are coupled to the two methylene protons that are three bonds away. In accordance with the n+1 rule, the signal from the methyl protons is split into three peaks with 1:2:1 relative intensities. The methylene protons appear as a quartet, with the relative intensities of 1:3:3:1.
Qualitatively, any spin plus-half nucleus polarizes the spins of its electrons to the minus-half state. Consequently, the paired electron in the hydrogen–carbon bond must...
1.4K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

The role of sulfur vacancies on FeS<sub>2</sub>(100) in NO dissociative adsorption: a combined <i>in situ</i> SR-XPS and DFT calculation study.

Physical chemistry chemical physics : PCCP·2026
Same author

Structural Transition in Few-Layer Group-IV Monochalcogenides Induced by Mechanical Forces.

ACS omega·2026
Same author

Association between the number of delirium-associated medications and postoperative delirium in older adults: a multicenter retrospective study.

International clinical psychopharmacology·2026
Same author

Regional chemical potential analysis for material surfaces.

The Journal of chemical physics·2026
Same author

Enhancing the bonding strength of PEEK through chemical modification with UV/ozone treatment.

Journal of prosthodontic research·2026
Same author

Orthorhombic TaAs: A New Topological Phase of the Archetypical Weyl Semimetal.

ACS applied materials & interfaces·2025
Same journal

Intrinsic Superconducting Gap in Bilayer KCa<sub>2</sub>Fe<sub>4</sub>As<sub>4</sub>F<sub>2</sub> and Decoupled Monolayer FeAs.

Nano letters·2026
Same journal

Programmable Hydrogen-Assisted Chemical Vapor Deposition Growth and Bipolar Transport in Two-Dimensional MoO<sub>2</sub> Nanoflakes.

Nano letters·2026
Same journal

A Curvature-Modulated Strategy for Single-Atom Catalysts toward Reciprocal Regulation in Li-S Batteries.

Nano letters·2026
Same journal

Vacuum Pyrolysis Engineered CoSb/C Scaffold for Sodium Metal Anodes with Sodiophilic and Superionic Interphase.

Nano letters·2026
Same journal

Hexagonal SiGe Quantum Dots in Nanowires.

Nano letters·2026
Same journal

Monolithic Axial InGaAs Quantum Dot Emitters in GaAs-Based Nanowires via Sb-Mediated Facet Engineering.

Nano letters·2026
See all related articles

Related Experiment Video

Updated: Jan 9, 2026

Probe Type II Band Alignment in One-Dimensional Van Der Waals Heterostructures Using First-Principles Calculations
13:56

Probe Type II Band Alignment in One-Dimensional Van Der Waals Heterostructures Using First-Principles Calculations

Published on: October 12, 2019

8.0K

Band Unfolding in Finite Nanostructures: Visualizing Dirac, Spin-Valley, and Rashba Features.

Naoya Yamaguchi1, Sefty Yunitasari2, Wardah Amalia2

  • 1Nanomaterials Research Institute (NanoMaRi), Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan.

Nano Letters
|December 10, 2025
PubMed
Summary
This summary is machine-generated.

We developed a novel "giant molecule band unfolding" (GMBU) method to analyze nanoscale electronic band structures in finite materials. This technique accurately reveals unique electronic properties without assuming periodicity, aiding in the design of novel nanomaterials.

Keywords:
band dispersionbent flakefirst-principles calculationgraphene flakespin splittingtungsten disulfide flake

More Related Videos

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
09:06

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope

Published on: March 24, 2019

8.5K
Microscopic Visualization of Porous Nanographenes Synthesized through a Combination of Solution and On-Surface Chemistry
08:18

Microscopic Visualization of Porous Nanographenes Synthesized through a Combination of Solution and On-Surface Chemistry

Published on: March 4, 2021

2.1K

Related Experiment Videos

Last Updated: Jan 9, 2026

Probe Type II Band Alignment in One-Dimensional Van Der Waals Heterostructures Using First-Principles Calculations
13:56

Probe Type II Band Alignment in One-Dimensional Van Der Waals Heterostructures Using First-Principles Calculations

Published on: October 12, 2019

8.0K
Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
09:06

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope

Published on: March 24, 2019

8.5K
Microscopic Visualization of Porous Nanographenes Synthesized through a Combination of Solution and On-Surface Chemistry
08:18

Microscopic Visualization of Porous Nanographenes Synthesized through a Combination of Solution and On-Surface Chemistry

Published on: March 4, 2021

2.1K

Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Nanotechnology

Background:

  • Nanomaterials exhibit unique electronic properties compared to bulk materials.
  • Nano-ARPES enables nanoscale band structure measurements, but theoretical tools for finite, aperiodic systems are limited.

Purpose of the Study:

  • To introduce a theoretical method for extracting band dispersion from finite, aperiodic nanoscale systems.
  • To enable the analysis of electronic properties in nanomaterials without periodic boundary conditions.

Main Methods:

  • Developed the "giant molecule band unfolding" (GMBU) procedure.
  • Utilized first-principles calculations on graphene, tungsten disulfide, and bismuth/silver nanoflakes.
  • Employed a spin-resolved formulation for visualizing spin textures.

Main Results:

  • Successfully reproduced characteristic band structures like Dirac cones, spin-valley locking, and Rashba spin splitting in nanoflakes.
  • GMBU visualized band dispersion even in bent nanoflakes.
  • The method demonstrated applicability across different dimensionalities and symmetry classes.

Conclusions:

  • GMBU provides an efficient framework for analyzing spintronic and valleytronic properties in finite nanomaterials.
  • The method bridges discrete and continuous electronic descriptions for nanoscale systems.
  • GMBU offers new possibilities for understanding and designing functional nanoscale materials.