キロマグネティックナノ粒子とゲル
Jihyeon Yeom1,2, Uallisson S Santos3, Mahshid Chekini2,4
1Department of Macromolecular Science and Engineering, University of Michigan, Ann Arbor, MI 48109, USA.
Science (New York, N.Y.)
|January 20, 2018
まとめ
磁場は,キラルナノ構造を制御することができます.
科学分野:
- 材料科学
- ナノテクノロジー
- 光学について
背景:
- チラルの無機ナノ構造は強い円形二重性を示しますが,それらの光学活動制御は通常不可逆的です.
- キラルナノ構造の光学活動のリアルタイム変調は,高度な光学デバイスにとって非常に望ましい.
- 磁場調節を達成するには,磁気移行二極モメントを持つ物質を探索する必要があります.
研究 の 目的:
- キラルナノ構造におけるカイロプティカル活動の磁場調節を調査する.
- 調整可能な光学特性のパラマグネティックナノ粒子の可能性を調査する.
- 外部磁場を用いた光学活動の可逆制御を証明する.
主な方法:
- 合成されたパラ磁性コバルト酸化物 (Co3O4) のナノ粒子は,キラル格子歪みがある.
- これらのナノ粒子の分散とゲル.
- 可視光と紫外線で測ったカイロプティック活動
- 磁場を適用して 透明性を円形の偏光に調節する
主要な成果:
- パラマグネット性Co3O4ナノ粒子は,非パラマグネット性ナノ粒子の10倍強の光学活性を示した.
- ナノ粒子ゲルは 透明性の反転可能な磁場変調を UV 循環的に偏光した光に示した.
- 同様の現象は,金属酸化物とキラルリガンドから派生した他のキラルセラミックナノ構造体でも観察されました.
結論:
- 磁気調節可能なカイロプティック特性の経路を提供する.
- この研究は,キラリティとマグネティズムの交差点にある新しい技術への道を開きます.
- 開発された材料は,リアルタイム制御を必要とする高度な光学装置に有望です.
関連する概念動画
01:22Two-dimensional Gel Electrophoresis
7.6K
Two-dimensional gel electrophoresis is a high-resolution protein separation method first introduced by O' Farrell and Klose in 1975. This method involves protein separation by two dimensions, mass and charge, making it more accurate than one-dimensional gel electrophoresis.
The first dimension separation uses the isoelectric focusing or IEF technique performed on immobilized pH gradient (IPG) strips that separate proteins according to their isoelectric points.
Biological samples, such...
The first dimension separation uses the isoelectric focusing or IEF technique performed on immobilized pH gradient (IPG) strips that separate proteins according to their isoelectric points.
Biological samples, such...
7.6K
02:35DNA Agarose Gel Electrophoresis
115.3K
Agarose gel electrophoresis is a laboratory technique commonly used to separate DNA fragments by size. However, it can also be used to isolate and purify DNA fragments using a gel extraction protocol.
Gel extraction follows five major steps: running gel electrophoresis to separate fragments, isolating the individual bands, extracting DNA from those bands, and removing the dye and salts from the extracted mixture to obtain pure DNA.
In cloning experiments, both the insert and vector DNA...
Gel extraction follows five major steps: running gel electrophoresis to separate fragments, isolating the individual bands, extracting DNA from those bands, and removing the dye and salts from the extracted mixture to obtain pure DNA.
In cloning experiments, both the insert and vector DNA...
115.3K
01:10Silica Gel Column Chromatography: Overview
3.7K
Silica gel column chromatography is a technique for separating compounds using a column packed with silica gel as the stationary phase. This method relies on differences in the polarity of compounds. Based on their polarities, compounds move between the stationary phase (silica gel) and the mobile phase (the solvent), forming discrete bands in the column.
Polar components tend to bind strongly to the silica gel, causing them to move slowly through the column. In contrast, nonpolar compounds...
Polar components tend to bind strongly to the silica gel, causing them to move slowly through the column. In contrast, nonpolar compounds...
3.7K
01:32The Nucleus
105.6K
The nucleus is a membrane-bound organelle that acts as a control center in a eukaryotic cell. It contains chromosomal DNA, which controls gene expression and precisely regulates the production of proteins within the cell. In contrast, the DNA inside the mitochondria and chloroplast only carries out functions that are specific to those organelles.
Arrangement of DNA within Nucleus
The regulation of gene expression inside the nucleus is dependent on many factors, including the DNA structure. The...
Arrangement of DNA within Nucleus
The regulation of gene expression inside the nucleus is dependent on many factors, including the DNA structure. The...
105.6K
02:34Polymers
41.5K
The word polymer is derived from the Greek words “poly” which means “many” and “mer” which means “parts”. Polymers are long chains of molecules composed of repeating units of smaller molecules, known as monomers. They either occur naturally, such as DNA and proteins, or can be constructed synthetically, like plastics. They have varied structural characteristics, such as linear chains, branched chains, or complex networks, that contribute to the...
41.5K
02:47Voltaic/Galvanic Cells
64.2K
Spontaneous Chemical Reactions
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
64.2K