Search research articles

お問い合わせ

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 Journal Methods Collections JoVE Encyclopedia of Experiments アーカイブ

教育

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual 教員リソースセンター教員サイト

プライバシーポリシー

関連する概念動画

Types of Radioactivity

Types of Radioactivity

The most common types of radioactivity are α decay, β decay, γ decay, neutron emission, and electron capture.
Alpha (α) decay is the emission of an α particle from the nucleus. For example, polonium-210 undergoes α decay:

¹³C NMR: ¹H–¹³C Decoupling

¹³C NMR: ¹H–¹³C Decoupling

The probability of having two carbon-13 atoms next to each other is negligible because of the low natural abundance of carbon-13. Consequently, peak splitting due to carbon-carbon spin-spin coupling is not observed in spectra. However, protons up to three sigma bonds away split the carbon signal according to the n+1 rule, resulting in complicated spectra.
A broadband decoupling technique is used to simplify these complex, sometimes overlapping, signals. Broadband decoupling relies on a...

Nuclear Overhauser Enhancement (NOE)

Nuclear Overhauser Enhancement (NOE)

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...

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

High Pressure Synthesis of Ultrasmall Nanodiamonds with Nitrogen Vacancy Centers.

Nano letters·2026

Same author

Deterministic, dynamically reconfigurable single quantum emitters enabled by tip-enhanced nano-optical trapping spectroscopy.

Nature communications·2026

Same author

Automated synthesis of InSb quantum dots with improved batch-to-batch reproducibility via kinetically matched co-reduction.

Nature communications·2026

Same author

A Prodrug Strategy to Conditionally Trap Therapeutic Payloads for Improved Tumor Retention.

ACS central science·2026

Same author

Leveling Up Upconverting Nanoparticles with Machine Learning.

Accounts of chemical research·2026

Same author

Upconversion Nanoparticles: Toward Programmable Nanoscale Photonic Systems.

Accounts of chemical research·2026

Same journal

Proton-Gated Torsional Spring for Molecular Energy Storage.

Journal of the American Chemical Society·2026

Same journal

Topologically Programmed Dual-Channel Covalent Organic Frameworks Decouple Gas and Ion Fluxes for Acidic CO<sub>2</sub> Electroreduction.

Journal of the American Chemical Society·2026

Same journal

Plasmonic Re-Excitation Enables Superoxide-Mediated Ethane Conversion to Acetic Acid under Visible Light.

Journal of the American Chemical Society·2026

Same journal

Photocatalytic Controlled Halodefluorination of Perfluoroalkyl Compounds Using <i>N</i>-Arylphenothiazines.

Journal of the American Chemical Society·2026

Same journal

Photoinduced Disproportionation Enables Oxidative Addition of Aryl Iodides at a Gallium(I) Center.

Journal of the American Chemical Society·2026

Same journal

Biocatalytic C3 β-<i>O</i>-Glycosylation of Triterpenes and Sterols to Synthesize Natural and Unnatural Saponins.

Journal of the American Chemical Society·2026

関連記事をすべて見る

Search research articles

関連する実験動画

Updated: May 8, 2026

An Integrated System to Remotely Trigger Intracellular Signal Transduction by Upconversion Nanoparticle-mediated Kinase Photoactivation

An Integrated System to Remotely Trigger Intracellular Signal Transduction by Upconversion Nanoparticle-mediated Kinase Photoactivation

Published on: August 30, 2017

短波赤外線アップコンバーティングナノ粒子

Xiao Qi¹, Changhwan Lee², Benedikt Ursprung²

¹The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States.

Journal of the American Chemical Society

|October 21, 2024

まとめ

この要約は機械生成です。

研究者らは,短波赤外線 (SWIR) を検出可能な信号に効率的に変換する新しいランタニドベースのアップコンバーティングナノ粒子 (UCNP) を開発しました. これらのSWIR対応の探査機はバイオイメージングの新たな可能性をもたらし先進的な視覚技術にとって不可欠です

さらに関連する動画

Infrared Degenerate Four-wave Mixing with Upconversion Detection for Quantitative Gas Sensing

Infrared Degenerate Four-wave Mixing with Upconversion Detection for Quantitative Gas Sensing

Published on: March 22, 2019

Triplet Fusion Upconversion Nanocapsule Synthesis

Triplet Fusion Upconversion Nanocapsule Synthesis

Published on: September 7, 2022

関連する実験動画

Last Updated: May 8, 2026

An Integrated System to Remotely Trigger Intracellular Signal Transduction by Upconversion Nanoparticle-mediated Kinase Photoactivation

An Integrated System to Remotely Trigger Intracellular Signal Transduction by Upconversion Nanoparticle-mediated Kinase Photoactivation

Published on: August 30, 2017

Infrared Degenerate Four-wave Mixing with Upconversion Detection for Quantitative Gas Sensing

Infrared Degenerate Four-wave Mixing with Upconversion Detection for Quantitative Gas Sensing

Published on: March 22, 2019

Triplet Fusion Upconversion Nanocapsule Synthesis

Triplet Fusion Upconversion Nanocapsule Synthesis

Published on: September 7, 2022

科学分野:

ナノテクノロジー
光学物理学
材料科学

背景:

光学技術は非侵襲的な分析を提供しますが,スペクトル領域によって制限されています.
ショートウェーブ赤外線 (SWIR) の波長により,深部に浸透し,光損傷を軽減できますが,適切な発光センサーは稀です.

研究の目的:

SWIR領域で刺激可能な新しいランタニドベースのアップコンバーティングナノ粒子 (UCNP) を発見する.
SWIR対応の探査機を使って新しいバイオイメージングウィンドウと先進的なビジョン技術を可能にします.

主な方法:

ランタニド (Ln3+) イオン組合せのスクリーニングは,微分速度方程式モデリングを使用します.
上向き変換された光発光刺激 (U-PLE) のスペクトルの実験的特徴付け.
エネルギー伝達経路を理解するためのメカニズムモデルです

主要な成果:

特定されたHo3+/Tm3+またはTm3+ドーパントは,効率的なSWIR刺激のためにNaYF4コア/シェルUCNPに含まれています.
1740nmまたは1950nmで強い可視またはNIR-I放射を生成するSWIR刺激が実証されています.
放射を652nmにシフトさせ,SWIRのエネルギー受容と再分配を向上させた.

結論:

SWIR対応のUCNPが開発され,新しいIRバイオイメージングウィンドウが開きます.
速度方程式モデルは,特定の刺激と放出波長のUCNP組成を正確に予測します.
これらの探査機は視野技術と深層地下分析に不可欠です