超クリーングラフェンの成長のための銅を含む炭素原料
Kaicheng Jia1, Jincan Zhang1,2, Li Lin1
1Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering , Peking University , Beijing 100871 , People's Republic of China.
Journal of the American Chemical Society
|May 7, 2019
まとめ
研究者達は,超清潔なグラフェンを育てるために,銅 (II) 酸塩を用いた新しい化学蒸気堆積法 (CVD) を開発した. この汚染のないグラフェンは,高度なアプリケーションのために,光学および電気的特性を高めています.
科学分野:
- 材料科学
- ナノテクノロジー
- 化学工学
背景:
- 化学蒸気堆積 (CVD) は,大規模な高品質のグラフェン生産に不可欠です.
- CVDで栽培されたグラフェンの表面汚染は,電子,光電子,膜アプリケーションでの使用を制限する.
研究 の 目的:
- 汚染のないグラフェンの成長のための改造されたガス相反応を開発する.
- CVDで栽培されたグラフェンの表面の清潔さと性質を高めるため
主な方法:
- 炭素源として銅 (II) アセテート (Cu) (OAc) 2) を用いた高温CVD工法を使用した.
- 表面汚染を抑制するガス相銅含有量の増加の役割を調査した.
- 炭素原料の分解とそのグラフェンの品質への影響を分析した.
主要な成果:
- 約99%の表面クリーンな超クリーンなグラフェンの大規模生育を達成しました.
- グラフェンフィルムの光学および電気的性質を大幅に改善しました.
- ガス相銅の含有量が増加すると,汚染の形成が効果的に抑制される.
結論:
- 銅 (II) アセテットを用いたCVDアプローチは,高品質で汚染のないグラフェンの実現可能な経路を提供します.
- この方法は,グラフェンの成長を制御するガス相反応機構に関する新しい洞察を提供します.
- 超クリーンなグラフェンは,高度な電子,光電子,膜の応用の可能性があります.
関連する概念動画
01:14The Carbon Cycle
43.3K
Carbon is the basis of all organic matter on Earth, and is recycled through the ecosystem in two primary processes: one in which carbon is exchanged among living organisms, and one in which carbon is cycled over long periods of time through fossilized organic remains, weathering of rocks, and volcanic activity. Human activities, including increased agricultural practices and the burning of fossil fuels, has greatly affected the balance of the natural carbon cycle.
43.3K
01:12Carbon Skeletons
114.6K
Life on Earth is carbon-based, as all macromolecules that make up living organisms contain carbon atoms. All organic compounds have a carbon backbone. Each carbon atom is tetravalent and can bond with four other atoms, making it an extraordinarily flexible component of biological molecules. Because carbon’s valence electrons are stable, it rarely becomes an ion. As the carbon chain increases in length, structural modifications such as ring structures, double bonds, and branching side...
114.6K
01:24Carbonation Shrinkage
457
Atmospheric CO2 penetrates the concrete's pores and, in the presence of moisture, forms carbonic acid, which then reacts with calcium hydroxide in the hydrated cement, forming calcium carbonate. This process reduces the concrete's volume and is termed carbonation shrinkage.
The concrete's permeability is slightly reduced as calcium carbonate produced during the reaction fills its pores. Furthermore, its strength is slightly enhanced as the water released during the reaction...
The concrete's permeability is slightly reduced as calcium carbonate produced during the reaction fills its pores. Furthermore, its strength is slightly enhanced as the water released during the reaction...
457
01:28Carbon-dioxide Fixation
687
Carbon dioxide fixation in prokaryotes enables the assimilation of inorganic carbon into organic molecules, supporting biosynthetic pathways, sustaining ecosystems, and contributing to the global carbon cycle. It also has industrial applications in carbon capture and bioproduct synthesis. Autotrophic organisms rely on this process to utilize CO₂ as a carbon source in diverse environments.The Calvin CycleThe Calvin cycle is the most widespread carbon fixation mechanism, primarily used by...
687
01:19Carbon Dioxide Transport in the Blood
4.9K
Carbon dioxide (CO2) transport in the blood is critical to human physiology. On average, our body cells produce around 200 mL of CO2 per minute, precisely the quantity expelled by the lungs. This process involves the transportation of CO2 from the tissue cells to the lungs in three primary forms.
Forms of CO2 Transport
1. Dissolved in plasma: A small percentage (7-10%) of CO2 is transported and dissolved directly in the plasma.
2. Carbaminohemoglobin: Just over 20% of CO2 is chemically bound to...
Forms of CO2 Transport
1. Dissolved in plasma: A small percentage (7-10%) of CO2 is transported and dissolved directly in the plasma.
2. Carbaminohemoglobin: Just over 20% of CO2 is chemically bound to...
4.9K
01:22Bicarbonate-Carbonic Acid Buffer
5.5K
The carbonic acid-bicarbonate buffer system is critical for maintaining the body's pH balance. It operates on the equilibrium:
5.5K