碳纳米管与光系统I的芯片上功能化
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
概括
我们使用三种化学路径,用光系统I (PSI) 来光电子功能化碳纳米管 (CNT). 特定的结合方向在PSI-CNT混合系统的光学激发时增强了光导.
科学领域:
- 生物物理学的生物物理.
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
背景情况:
- 碳纳米管 (CNTs) 正在探索电子应用.
- 光系统I (PSI) 是光合作用中的一个关键蛋白质复合体.
- 生物分子与纳米材料的整合是一个不断增长的研究领域.
研究的目的:
- 使用不同的化学结合策略,以光电子方式将CNT与PSI功能化.
- 调查PSI导向对CNT对混合系统性能的影响.
- 为了使单个PSI-CNT混合系统与电气接触.
主要方法:
- CNT与PSI在芯片上的化学功能化.
- 使用共价,和静电结合方法.
- 单个PSI-CNT混合系统的电气特性.
主要成果:
- 通过三个不同的化学路径将PSI成功集成到CNT中.
- 证明了与单个PSI-CNT混合系统的电气接触.
- 当PSI的电子传输路径垂直于CNTs时,观察到增强的光导.
结论:
- 具有约束力的机制决定了PSI对CNT的方向.
- 通过PSI实现CNT的光电子功能化是可行的.
- 控制的PSI-CNT相互作用可以导致增强的光电子特性.
相关概念视频
Photosystem 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...
Photosystem 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...
The 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...
Photosystems
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...


