関連する実験動画
Updated: Feb 1, 2026

09:23
Harmonic Nanoparticles for Regenerative Research
Published on: May 1, 2014
12.1K
Pb2GaF2(SeO3) 2Cl:強固な第2ハーモニック生成応答を維持しながらバンドギャップを拡大するためのアリオヴェラント置換によるバンドエンジニアリング戦略
Fengguang You1,2, Fei Liang1,2, Qian Huang3
1Technical Institute of Physics and Chemistry, Chinese Academy of Sciences , Beijing 100190 , China.
Journal of the American Chemical Society
|November 30, 2018
まとめ
研究者は新しい非線形光学結晶,Pb2GaF2(SeO3) 2Clを開発し,広帯域と強い二次ハーモニク生成を達成しました. この材料は典型的なトレードオフを克服し,高度な光学アプリケーションの可能性を提供します.
科学分野:
- 材料科学
- 固体化学
- 光電子機器
背景:
- 実践的な非線形光学 (NLO) 材料には,しばしば矛盾する性質を持つ広い帯域間隔と強力な二次生成 (SHG) が必要です.
- 既存のNLOセレナイトは,バンドギャップとSHGのパフォーマンスとのトレードオフによる制限に直面しています.
研究 の 目的:
- バンドギャップが広く SHG効果が強い新しい NLO結晶を設計し合成する.
- 望ましいNLO特性の達成における特定の構造単位とバンドエンジニアリングの役割を調査する.
主な方法:
- 合理的なバンドエンジニアリング戦略は,アリオヴァレンツ置換を使用します.
- 新しいNLO結晶 Pb2GaF2 ((SeO3) 2Clの合成
- 電子構造とバンドギャップの起源を明らかにする第一原理の計算
主要な成果:
- 合成された結晶Pb2GaF2(SeO3) 2Clは相対称なNLOセレニットの中で最も広い帯域のギャップを示している.
- KH2PO4 (KDP) の4. 5倍以上の強力なSHG反応が達成されました.
- 第一原理の研究では, (GaO3F3) 6の八面体が帯域の拡大に大きく寄与していることが確認された.
結論:
- Pb2GaF2 ((SeO3) 2Clは,帯域ギャップ-SHGのトレードオフを克服して,NLO材料の設計における画期的な進歩を表しています.
- 新型 (GaO3F3) 6機能群は,NLOセレナイトの広い帯域の達成の鍵です.
- この材料は非線形光学の実用的な応用が期待されます.
関連する概念動画
Titration Calculations: Strong Acid - Strong Base
33.9K
Calculating pH for Titration Solutions: Strong Acid/Strong Base
A titration is carried out for 25.00 mL of 0.100 M HCl (strong acid) with 0.100 M of a strong base NaOH. The pH at different volumes of added base solution can be calculated as follows:
(a) Titrant volume = 0 mL. The solution pH is due to the acid ionization of HCl. Because this is a strong acid, the ionization is complete and the hydronium ion molarity is 0.100 M. The pH of the solution is then:
A titration is carried out for 25.00 mL of 0.100 M HCl (strong acid) with 0.100 M of a strong base NaOH. The pH at different volumes of added base solution can be calculated as follows:
(a) Titrant volume = 0 mL. The solution pH is due to the acid ionization of HCl. Because this is a strong acid, the ionization is complete and the hydronium ion molarity is 0.100 M. The pH of the solution is then:
33.9K
Band Theory
17.2K
When two or more atoms come together to form a molecule, their atomic orbitals combine and molecular orbitals of distinct energies result. In a solid, there are a large number of atoms, and therefore a large number of atomic orbitals that may be combined into molecular orbitals. These groups of molecular orbitals are so closely placed together to form continuous regions of energies, known as the bands.
The energy difference between these bands is known as the band gap.
Conductor, Semiconductor,...
The energy difference between these bands is known as the band gap.
Conductor, Semiconductor,...
17.2K
Harmonic Mean
3.7K
The arithmetic mean is usually skewed towards the larger values in the data set. Therefore, to avoid this inherent bias towards smaller values, the harmonic mean is used.
Take the example of the speed of a car, which is the measure of the rate of distance traveled. If the vehicle traverses the same distance back-and-forth, its average speed equals the total distance traveled divided by the total time taken. However, if the car moves with varying speeds, then the arithmetic mean is more skewed...
Take the example of the speed of a car, which is the measure of the rate of distance traveled. If the vehicle traverses the same distance back-and-forth, its average speed equals the total distance traveled divided by the total time taken. However, if the car moves with varying speeds, then the arithmetic mean is more skewed...
3.7K
Enlargement of the Plasma Membrane
2.4K
Cell division and enlargement are processes that require precise control. The control ensures that cell division cannot proceed unless the cell has grown to a specific size. A spherical, dividing cell requires an approximately 1.6X increase in its surface area to double its volume. The secretory pathway also has a significant role in cell membrane enlargement. Secretory vesicles that bud off from the Golgi apparatus and later fuse with the plasma membrane during exocytosis are a major source of...
2.4K
Strong Acid and Base Solutions
35.7K
A strong acid is a compound that dissociates completely in an aqueous solution and produces a concentration of hydronium ions equal to the initial concentration of acid. For example, 0.20 M hydrobromic acid will dissociate completely in water and produces 0.20 M of hydronium ions and 0.20 M of bromide ions.
35.7K
Titration Calculations: Weak Acid - Strong Base
49.3K
Calculating pH for Titration Solutions: Weak Acid/Strong Base
For the titration of 25.00 mL of 0.100 M CH3CO2H with 0.100 M NaOH, the reaction can be represented as:
For the titration of 25.00 mL of 0.100 M CH3CO2H with 0.100 M NaOH, the reaction can be represented as:
49.3K

