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関連する概念動画

Kinetic Energy00:23

Kinetic Energy

Kinetic energy is the ability of an object in motion to do work or enact change. It can take on many forms. For instance, water flowing down a waterfall has kinetic energy. In biological systems, particles of light travel and are absorbed by plants to create chemical energy. Animals consume the chemical energy and give off molecules that carry their scent through the air. They also generate kinetic energy when they run away from predators. Entire systems also possess kinetic energy, like the...
Molecular Kinetic Energy01:21

Molecular Kinetic Energy

The word "gas" comes from the Flemish word meaning "chaos," first used to describe vapors by the chemist J. B. van Helmont. Consider a container filled with gas, with a continuous and random motion of molecules. During collisions, the velocity component parallel to the wall is unchanged, and the component perpendicular to the wall reverses direction but does not change in magnitude. If the molecule’s velocity changes in the x-direction, then its momentum is changed. During the short time of the...
Kinetic Energy - II00:56

Kinetic Energy - II

The kinetic energy of a particle is one-half of the product of the particle’s mass and the square of its speed. Note that just as Newton’s second law can be expressed as either the rate of change of momentum or mass multiplied by the rate of change of velocity, so too can the kinetic energy of a particle be expressed in terms of its mass and momentum, instead of its mass and velocity.
Kinetic Friction01:26

Kinetic Friction

Consider a truck trying to pull a stationary car. As the truck exerts a force on the car, static friction is created at the point of contact between the two surfaces. This frictional force resists the car's movement and keeps it at rest. However, when the applied force by the truck surpasses the limiting static frictional force, an interesting phenomenon occurs. The frictional force at the interface reduces to a lower value, known as the kinetic frictional force. At this point, the car begins...
Kinetic Energy - I01:18

Kinetic Energy - I

It’s plausible to suppose that the greater the velocity of a body, the greater effect it could have on other bodies. This does not depend on the direction of the velocity, only its magnitude. At the end of the seventeenth century, a quantity was introduced into mechanics to explain collisions between two perfectly elastic bodies, in which one body makes a head-on collision with an identical body at rest. When they collide, the first body stops, and the second body moves off with the initial...

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Updated: Jul 2, 2026

Correlative Light- and Electron Microscopy Using Quantum Dot Nanoparticles
11:16

Correlative Light- and Electron Microscopy Using Quantum Dot Nanoparticles

Published on: August 7, 2016

カラー・キネティックナノ粒子

Baris Kokuoz1, Jeffrey R DiMaio, Courtney J Kucera

  • 1Center for Optical Materials Science and Engineering Technologies and the School of Materials Science and Engineering, Clemson University, 91 Technology Drive, Anderson, South Carolina 29625, USA.

Journal of the American Chemical Society
|August 30, 2008
PubMed
まとめ
この要約は機械生成です。

ヨーロッパのドーピングされたランタンフッ化物ナノ粒子は,多用途の刺激波長を調整することにより,赤から青まで調節可能な色,白色を含む光を提供します.

さらに関連する動画

Harmonic Nanoparticles for Regenerative Research
09:23

Harmonic Nanoparticles for Regenerative Research

Published on: May 1, 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: Jul 2, 2026

Correlative Light- and Electron Microscopy Using Quantum Dot Nanoparticles
11:16

Correlative Light- and Electron Microscopy Using Quantum Dot Nanoparticles

Published on: August 7, 2016

Harmonic Nanoparticles for Regenerative Research
09:23

Harmonic Nanoparticles for Regenerative Research

Published on: May 1, 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
  • ナノテクノロジー ナノテクノロジー
  • 発光する光度 (luminescence)

背景:

  • ランタン・フッ化物 (LaF3) ナノ粒子は,そのユニークな光学特性のために調査されています.
  • ユーロピウム (Eu3+) ドーピングは発光をもたらすが,放射色を制御することは困難である.

研究 の 目的:

  • 特定のリガンドで機能化されたEu3+ドーピングされたLaF3ナノ粒子を合成する.
  • これらのナノ粒子の刺激エネルギーに依存する色調調調節性を調査するために.
  • このアプローチを用いて白光の生成を実証する.

主な方法:

  • Eu3+ドーピングされたLaF3ナノ粒子の合成.
  • 3〜4種類のホルミルフェニルベンゾ酸リガンドによる機能化.
  • 異なる刺激波長下での光発光特性の特徴化.

主要な成果:

  • 機能化されたEu3+ドーピングされたLaF3ナノ粒子の合成が成功しました.
  • リガンドからEu3+への,観察された興奮エネルギー依存のエネルギー転送.
  • 赤から緑青の放射をカバーする色調の調律性を達成しました.
  • 興奮波長を制御することによって白光の生成が実証された.

結論:

  • 機能化されたナノ粒子は,制御可能で調節可能な光を発する.
  • この方法では,刺激波長に伴い,色差が大きく変化します.
  • このアプローチは,新しい白い光を放射する材料の開発に有望である.