Jove
Visualize
お問い合わせ
JoVE
x logofacebook logolinkedin logoyoutube logo
JoVEについて
概要リーダーシップブログJoVEヘルプセンター
著者向け
出版プロセス編集委員会範囲と方針査読よくある質問投稿
図書館員向け
推薦の声購読アクセスリソース図書館諮問委員会よくある質問
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experimentsアーカイブ
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教員リソースセンター教員サイト
利用規約
プライバシーポリシー
ポリシー

関連する概念動画

Nuclear Overhauser Enhancement (NOE)01:06

Nuclear Overhauser Enhancement (NOE)

1.5K
Irradiation of a spin-active nucleus causes an increase or decrease in the signal intensity of neighboring nuclei that are not necessarily chemically bonded or involved in J-coupling. This phenomenon, called the nuclear Overhauser enhancement (NOE), results from through-space interactions between the nuclear spins. The NOE effect decreases with increasing internuclear distance and is generally not observed beyond 4 angstroms. In NOE, dipole-dipole interactions between neighboring spin-active...
1.5K
Crystal Field Theory - Tetrahedral and Square Planar Complexes02:46

Crystal Field Theory - Tetrahedral and Square Planar Complexes

49.2K
Tetrahedral Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
49.2K
Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)01:20

Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)

1.9K
Two NMR-active nuclei bonded to a central atom can be involved in geminal or two-bond coupling. Geminal coupling is commonly seen between diastereotopic protons in chiral molecules and unsymmetrical alkenes, among others.
The central atom need not be NMR-active because its electrons are affected by the electron polarization of the spin-active atoms. However, spin information is transmitted less effectively than in one-bond coupling, and 2J values are usually weaker than 1J values. The energy of...
1.9K
π Electron Effects on Chemical Shift: Overview01:27

π Electron Effects on Chemical Shift: Overview

1.8K
An applied magnetic field causes loosely bound π-electrons in organic molecules to circulate, producing a local or induced diamagnetic field over a large spatial volume. As the molecules tumble in solution, the field generated by π-electrons in spherical substituents results in a zero net field. However, the net field generated by π-electrons in non-spherical substituents is not zero. The effect of this induced field depends on the orientation of the molecule with respect to B0,...
1.8K
Colors and Magnetism03:02

Colors and Magnetism

14.4K
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...
14.4K
Molecular Orbital Theory II03:51

Molecular Orbital Theory II

28.0K
Molecular Orbital Energy Diagrams
28.0K

こちらも読む

関連記事

共著者、ジャーナル、引用グラフによってこの研究に関連する記事。

並び替え
Same author

Electrochemical Oxidation Property of Antioxidative Substances in the Oil-Based Solution.

Foods (Basel, Switzerland)·2026
Same author

High-Spin Pt Sites of Intermetallic Compound via Pinning Effect Boost Oxygen Reduction Performance.

Angewandte Chemie (International ed. in English)·2026
Same author

Atomically Engineered RuO<sub>x</sub>-Cu Interfaces Enabling Tandem Catalysis for Ampere-Level Nitrite-Ethanol Co-Electrolysis.

Angewandte Chemie (International ed. in English)·2026
Same author

Bleaching Performance and Mechanism of Al-MCM-41 Tuned by Si/Al in Rapeseed Oil.

Foods (Basel, Switzerland)·2026
Same author

Molecular Bridge Enables Dual-Intermediate Synergy for Selective CO<sub>2</sub> Electroreduction to Multicarbon Products.

Angewandte Chemie (International ed. in English)·2026
Same author

Interpretable machine learning model integrating MRI-derived paraspinal muscle parameters for predicting new vertebral compression fractures after vertebral augmentation.

European radiology·2026

関連する実験動画

Updated: Mar 6, 2026

A Standard and Reliable Method to Fabricate Two-Dimensional Nanoelectronics
07:12

A Standard and Reliable Method to Fabricate Two-Dimensional Nanoelectronics

Published on: August 28, 2018

10.6K

二次元MnO2ナノ材料における二重交換効果

Xu Peng1, Yuqiao Guo1, Qin Yin1

  • 1Hefei National Laboratory for Physical Sciences at the Microscale, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), CAS Center for Excellence in Nanoscience, and CAS Key Laboratory of Mechanical Behavior and Design of Materials, University of Science and Technology of China , Hefei, Anhui 230026, P. R. China.

Journal of the American Chemical Society
|March 18, 2017
PubMed
まとめ
この要約は機械生成です。

研究者は2Dの二酸化マンガン (MnO2) ナノ材料で,室温に近い金属分離器の移行を誘導した. この移行は超高負磁気抵抗を示し,先進的なスマートデバイスの道を開きます.

さらに関連する動画

Ohmic Contact Fabrication Using a Focused-ion Beam Technique and Electrical Characterization for Layer Semiconductor Nanostructures
08:12

Ohmic Contact Fabrication Using a Focused-ion Beam Technique and Electrical Characterization for Layer Semiconductor Nanostructures

Published on: December 5, 2015

12.8K
Spin Saturation Transfer Difference NMR SSTD NMR: A New Tool to Obtain Kinetic Parameters of Chemical Exchange Processes
11:44

Spin Saturation Transfer Difference NMR SSTD NMR: A New Tool to Obtain Kinetic Parameters of Chemical Exchange Processes

Published on: November 12, 2016

18.7K

関連する実験動画

Last Updated: Mar 6, 2026

A Standard and Reliable Method to Fabricate Two-Dimensional Nanoelectronics
07:12

A Standard and Reliable Method to Fabricate Two-Dimensional Nanoelectronics

Published on: August 28, 2018

10.6K
Ohmic Contact Fabrication Using a Focused-ion Beam Technique and Electrical Characterization for Layer Semiconductor Nanostructures
08:12

Ohmic Contact Fabrication Using a Focused-ion Beam Technique and Electrical Characterization for Layer Semiconductor Nanostructures

Published on: December 5, 2015

12.8K
Spin Saturation Transfer Difference NMR SSTD NMR: A New Tool to Obtain Kinetic Parameters of Chemical Exchange Processes
11:44

Spin Saturation Transfer Difference NMR SSTD NMR: A New Tool to Obtain Kinetic Parameters of Chemical Exchange Processes

Published on: November 12, 2016

18.7K

科学分野:

  • 材料科学
  • 凝縮物質物理学
  • ナノテクノロジー

背景:

  • 電子状態の移行,特に金属分離器の移行 (MIT) は,エネルギーアプリケーションとスマートデバイスにとって不可欠です.
  • 単純な金属酸化物には,室温に近い電子状態の移行があり,実用的な使用を制限しています.

研究 の 目的:

  • 2次元 (2D) ナノ材料で室温に近いMITの化学誘導を実証する.
  • 2次元材料における新しい電子特性に対する二重交換効果の可能性を調査する.

主な方法:

  • 二次元二酸化マンガン (MnO2) のナノシートのバレンスの状態を化学的に調節する.
  • 二重交換効果を促進するために,Mn (III) -O-Mn (IV) 構造を誘導する.
  • 電子トランジションと磁気抵抗 (MR) の特性を実験的に特徴づける.

主要な成果:

  • 2D MnO2ナノマテリアルで,二重交換の化学誘導により,室温に近いMITを達成した.
  • 室温に近い2Dナノ材料で報告された最高値である−11.3% (0.1T) の超高負のMR値が観測されました.
  • 270Kと290Kの間の7.1%の伝導率の変化で,有意な赤外線反応を示した.

結論:

  • 2D MnO2ナノシートに二重交換構造の寸法的な閉じ込めは,重要な磁気輸送特性を可能にします.
  • 観測された超高負のMRと赤外線応答は,敏感なスマートデバイスのアプリケーションの可能性を示唆しています.