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関連する概念動画

Super-resolution Fluorescence Microscopy01:37

Super-resolution Fluorescence Microscopy

Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been developed.
Photoluminescence: Applications01:14

Photoluminescence: Applications

Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
Photoreceptors and Visual Pathways01:22

Photoreceptors and Visual Pathways

At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category, whereas...
Photoelectric Effect02:26

Photoelectric Effect

When light of a particular wavelength strikes a metal surface, electrons are emitted. This is called the photoelectric effect. The minimum frequency of light that can cause such emission of electrons is called the threshold frequency, which is specific to the metal. Light with a frequency lower than the threshold frequency, even if it is of high intensity, cannot initiate the emission of electrons. However, when the frequency is higher than the threshold value, the number of electrons ejected...

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Updated: Jun 17, 2026

Fabrication of White Light-emitting Electrochemical Cells with Stable Emission from Exciplexes
05:51

Fabrication of White Light-emitting Electrochemical Cells with Stable Emission from Exciplexes

Published on: November 15, 2016

単一の化合物によるホワイトライト生成のためのアップコンバージョン.

Jiwei Wang1, Peter A Tanner

  • 1Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong S.A.R., PR China.

Journal of the American Chemical Society
|December 23, 2009
PubMed
まとめ
この要約は機械生成です。

研究者らは,赤外線レーザーを用いて稀土酸化物粉末のための新しいマルチフォトンアップコンバージョンプロセスを開発しました. この方法は可視光放射を生成し,チューリウムとイテルビウム酸化物が純白のアップコンバージョンを達成します.

さらに関連する動画

Integrating a Triplet-triplet Annihilation Up-conversion System to Enhance Dye-sensitized Solar Cell Response to Sub-bandgap Light
11:26

Integrating a Triplet-triplet Annihilation Up-conversion System to Enhance Dye-sensitized Solar Cell Response to Sub-bandgap Light

Published on: September 12, 2014

A 'Plug and Play' Method to Create Water-dispersible Nanoassemblies Containing an Amphiphilic Polymer, Organic Dyes and Upconverting Nanoparticles
12:51

A 'Plug and Play' Method to Create Water-dispersible Nanoassemblies Containing an Amphiphilic Polymer, Organic Dyes and Upconverting Nanoparticles

Published on: November 14, 2015

関連する実験動画

Last Updated: Jun 17, 2026

Fabrication of White Light-emitting Electrochemical Cells with Stable Emission from Exciplexes
05:51

Fabrication of White Light-emitting Electrochemical Cells with Stable Emission from Exciplexes

Published on: November 15, 2016

Integrating a Triplet-triplet Annihilation Up-conversion System to Enhance Dye-sensitized Solar Cell Response to Sub-bandgap Light
11:26

Integrating a Triplet-triplet Annihilation Up-conversion System to Enhance Dye-sensitized Solar Cell Response to Sub-bandgap Light

Published on: September 12, 2014

A 'Plug and Play' Method to Create Water-dispersible Nanoassemblies Containing an Amphiphilic Polymer, Organic Dyes and Upconverting Nanoparticles
12:51

A 'Plug and Play' Method to Create Water-dispersible Nanoassemblies Containing an Amphiphilic Polymer, Organic Dyes and Upconverting Nanoparticles

Published on: November 14, 2015

科学分野:

  • マテリアルサイエンス 材料科学
  • 光学とフォトニック
  • 固体物理 固体物理学

背景:

  • 稀土酸化物粉は,光学アプリケーションにおいて極めて重要です.
  • アップコンバージョンプロセスは,材料の光度を増強します.
  • アップコンバーションの排出を制御することは,先進フォトニクスの鍵です.

研究 の 目的:

  • 稀土酸化物粉の新たなマルチフォトンアップコンバージョンプロセスを報告する.
  • 向上変換による可視スペクトル範囲の放射を証明するために.
  • 特定の稀土酸化物を用いて純白のアップコンバージョンを達成するために.

主な方法:

  • 刺激のために赤外線レーザーダイオードを使用します.
  • 真空環境で実験を行うこと.
  • チューリウム (Tm2O3) とイテルビウム (Yb2O3) オキシード粉を使用しています.

主要な成果:

  • マルチフォトン向上変換の実証が成功しました.
  • 可視スペクトル範囲で観測された強烈な上向き変換放射.
  • Tm2O3 (808 nm刺激) とYb2O3 (975 nm刺激) で達成された純白のアップコンバージョン.

結論:

  • 報告されたマルチフォトンアップコンバージョンプロセスは,稀土酸化物に対して有効である.
  • 赤外線レーザー刺激は,可視上方変換放射を効率的に生成することができます.
  • 特定の稀土酸化物は,白光放射を達成するための経路を提供します.