関連する実験動画
Updated: Jul 18, 2026

10:18
Blue-hazard-free Candlelight OLED
Published on: March 19, 2017
液晶の"青い相"は,温度範囲が広い.
Harry J Coles1, Mikhail N Pivnenko
1Centre of Molecular Materials for Photonics and Electronics, Engineering Department, University of Cambridge, Trumpington Street, Cambridge CB2 1PZ, UK. hjc37@cam.ac.uk
Nature
|August 19, 2005
まとめ
研究者らは,青色相の温度範囲が広い新しい液晶を開発し,調節可能な光学結晶のアプリケーションを可能にしました. これらの材料は,電場における可逆的な色交換を現し,以前の制限を克服しています.
科学分野:
- マテリアルサイエンス 材料科学
- 凝縮物質物理学 凝縮物質物理学
- クリスタルグラフィーです.
背景:
- 青色相は,光散射特性を有する自己組み立て立方体液晶構造である.
- 彼らの狭い温度範囲 (0.5-2°C) は,調節可能な光子結晶としての実用的なアプリケーションを制限しています.
- 既存の青色相は,イソトロピックとキラルネマティック (N*) 相の間に限られている.
研究 の 目的:
- 青色相の熱安定性が著しく向上した液晶を開発する.
- フォトニックアプリケーションにおけるこれらの新しい材料の潜在能力を探求する.
- 観測された広範な青色の相安定性の基礎となるメカニズムを調査する.
主な方法:
- 光学的なテクスチャー分析
- 選択的反射スペクトロスコーピーは,選択的反射スペクトロスコーピーを用います.
- コッセル図は,コッセル図である.
- 微分スキャニング熱計は,微分スキャニング熱計です.
- 電気光学電池の測定について
主要な成果:
- 60°Cから16°Cまでの広い体中心の立方相 (BP I*) を表す新しい液晶ファミリーが発見されました.
- リバーシブルな,広域のカラースイッチングは,偏光器のないセル内の電場を使用して10 msで達成されました.
- 強化された安定性は,二次元分子構造と高フレキシ電気係数に起因する.
結論:
- 開発された液晶は,安定した,広く調節可能な青色相を提供し,以前の熱的制限を克服します.
- これらの材料は,高度なフォトニックアプリケーションのための大きな可能性を示しています.
- この発見は,液晶の研究における新たな理論的課題と機会を提示する.
関連する概念動画
Membrane Fluidity
Cell membranes are composed of phospholipids, proteins, and carbohydrates loosely attached to one another through chemical interactions. Molecules are generally able to move about in the plane of the membrane, giving the membrane its flexible nature called fluidity. Two other features of the membrane contribute to membrane fluidity: the chemical structure of the phospholipids and the presence of cholesterol in the membrane.Fatty acids tails of phospholipids can be either saturated or...
Phase Diagrams
A phase diagram combines plots of pressure versus temperature for the liquid-gas, solid-liquid, and solid-gas phase-transition equilibria of a substance. These diagrams indicate the physical states that exist under specific conditions of pressure and temperature and also provide the pressure dependence of the phase-transition temperatures (melting points, sublimation points, boiling points). Regions or areas labeled solid, liquid, and gas represent single phases, while lines or curves represent...
Membrane Fluidity
Membrane fluidity is explained by the fluid mosaic model of the cell membrane, which describes the plasma membrane structure as a mosaic of components—including phospholipids, cholesterol, proteins, and carbohydrates—that gives the membrane a fluid character.
Mosaic nature of the membrane
The mosaic characteristic of the membrane helps the plasma membrane remain fluid. The integral proteins and lipids exist as separate but loosely-attached molecules in the membrane. The membrane is a relatively...
Mosaic nature of the membrane
The mosaic characteristic of the membrane helps the plasma membrane remain fluid. The integral proteins and lipids exist as separate but loosely-attached molecules in the membrane. The membrane is a relatively...
Thermometers and Temperature Scales
Any physical property that depends consistently and reproducibly on temperature can be used as the basis of a thermometer. For example, volume increases with temperature for most substances. This property is the basis for the common alcohol thermometer and the original mercury thermometers. Other properties used to measure temperature include electrical resistance, color, and the emission of infrared radiation.
As many physical properties depend on temperature, the variety of thermometers is...
As many physical properties depend on temperature, the variety of thermometers is...
Phase Diagram
The phase of a given substance depends on the pressure and temperature. Thus, plots of pressure versus temperature showing the phase in each region provide considerable insights into the thermal properties of substances. Such plots are known as phase diagrams. For instance, in the phase diagram for water (Figure 1), the solid curve boundaries between the phases indicate phase transitions (i.e., temperatures and pressures at which the phases coexist).
Phase Diagram
A phase diagram is a graphical representation of the physical states of a substance under different conditions of temperature and pressure. It shows the boundaries between solid, liquid, and gas phases and the conditions at which these phases coexist in equilibrium. An area in a phase diagram represents a single phase, whereas lines or phase boundaries represent the equilibrium between two phases.In the phase diagram of water, the boundary line between the solid and liquid states illustrates...

