炭素ナノチューブのオンチップ機能化とフォトシステムI
Simone M Kaniber1, Matthias Brandstetter, Friedrich C Simmel
1Walter Schottky Institut, Technische Universität München, Am Coulombwall 3, D-85748 Garching, Germany.
Journal of the American Chemical Society
|February 13, 2010
まとめ
私たちは,3つの化学経路を使用して光システムI (PSI) の炭素ナノチューブ (CNT) を光電子的に機能化しました. 特定の結合方向は,PSI-CNTハイブリッドシステムの光学刺激時に光伝導性を強化しました.
科学分野:
- バイオフィジックス 生物物理学
- 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
背景:
- 炭素ナノチューブ (CNTs) は,電子アプリケーションのために探求されています.
- 光システムI (PSI) は,光合成における重要なタンパク質複合体である.
- バイオ分子とナノマテリアルの統合は,成長する研究分野です.
研究 の 目的:
- 異なる化学結合戦略を使用して,PSIとCNTを光電子的に機能化します.
- ハイブリッドシステムのパフォーマンスのためのCNTに対するPSI指向の効果を調査する.
- 単一のPSI-CNTハイブリッドシステムとの電気的接触を可能にします.
主な方法:
- PSIによるCNTのオンチップ化学機能化.
- コヴァレント,水素,静電結合の方法を使用しています.
- 単一のPSI-CNTハイブリッドシステムの電気的特徴.
主要な成果:
- 3つの異なる化学経路を経由して,PSIをCNTに統合した.
- 個々のPSI-CNTハイブリッドシステムとの電気的接触が実証されています.
- PSIの電子輸送経路がCNTに垂直であるとき,光伝導性が強化されたことが観察されました.
結論:
- 拘束力のあるメカニズムは,CNTに対するPSIの指向を決定する.
- CNTをPSIで光電子機能化することは可能である.
- 制御されたPSI-CNT相互作用は,強化された光電子特性につながる可能性があります.
関連する概念動画
01:27Photosystem I
Although structurally similar to photosystem II (PSII), photosystem I (PSI) is has a different electron supplier and electron acceptor.
Both these photosystems work in concert. An excited electron from PSII is relayed to PSI via an electron transport chain in the thylakoid membrane of the chloroplast, which is comprised of the carrier molecule plastoquinone, the dual-protein cytochrome complex, and plastocyanin. As electrons move between PSII and PSI, they lose energy and must be re-energized...
Both these photosystems work in concert. An excited electron from PSII is relayed to PSI via an electron transport chain in the thylakoid membrane of the chloroplast, which is comprised of the carrier molecule plastoquinone, the dual-protein cytochrome complex, and plastocyanin. As electrons move between PSII and PSI, they lose energy and must be re-energized...
01:22Photosystem II
The multi-protein complex photosystem II (PS II) harvests photons and transfers their energy through its bound pigments to its reaction center, and ultimately to photosystem I (PSI) through the electron transport chain. The pigments responsible for caputirng the light energy in photosystems include chlorophyll a, chlorophyll b, and carotenoids.
The pigment molecules are arranged across two photosystem domains — the antenna complex and the reaction center. The main aim of the pigment molecules...
The pigment molecules are arranged across two photosystem domains — the antenna complex and the reaction center. The main aim of the pigment molecules...
01:34The Z-Scheme of Electron Transport in Photosynthesis
The light reactions of photosynthesis assume a linear flow of electrons from water to NADP+. During this process, light energy drives the splitting of water molecules to produce oxygen. However, oxidation of water molecules is a thermodynamically unfavorable reaction and requires a strong oxidizing agent. This is accomplished by the first product of light reactions: oxidized P680 (or P680+), the most powerful oxidizing agent known in biology. The oxidized P680 that acquires an electron from the...
01:32Photosystems
Photosystems are multiprotein complexes that form the functional units of photosynthesis in plants, algae, and cyanobacteria. They are found embedded in the membrane of tiny sac-like structures called thylakoids placed inside the chloroplast.
Functioning of Photosystems
Photosystems contain many pigment molecules, such as chlorophylls and carotenoids, arranged in a particular organization across two domains — the antenna complex and the reaction center. The main aim of the pigment molecules...
Functioning of Photosystems
Photosystems contain many pigment molecules, such as chlorophylls and carotenoids, arranged in a particular organization across two domains — the antenna complex and the reaction center. The main aim of the pigment molecules...