在碳纳米管中进行电子转移离子传输
Dengchao Wang1, Michael V Mirkin1
1Department of Chemistry and Biochemistry, Queens College, City University of New York , Flushing, New York 11367, United States.
Journal of the American Chemical Society
|August 12, 2017
概括
碳纳米管为传感应用提供可调的表面电荷. 电子转移封闭的离子运输可以通过氧化还原物种精确控制,从而使敏感的微量分析成为可能.
科学领域:
- 电化学
- 纳米技术
- 分析化学
背景情况:
- 用碳涂覆的石英纳米管提供可调整的表面特性.
- 碳纳米孔可以进行电阻脉冲和整形传感.
- 电子转移封闭的离子传输对于纳米孔感应至关重要.
研究的目的:
- 在碳纳米管中实验研究和模拟离子运输.
- 研究氧化还原物种对纳米孔潜力和离子传输的影响.
- 探索使用碳纳米管的微量分析的潜力.
主要方法:
- 用碳层覆盖石英纳米管.
- 使用双极电化学调整碳层潜力与氧化还原物种.
- 在不同的氧化还原条件下测量离子电流和整流.
- 模拟电子转移封闭的离子传输过程.
主要成果:
- 通过亚纳米氧化还原物种度调节碳纳米管的潜力.
- 离子电流整顿是由添加的氧化还原物种的形式潜力调节的.
- 负形式的氧化还原潜力增加了整化,而正的则减少了.
- 观察到离子电流对氧化还原物种的高度敏感性.
结论:
- 碳纳米管提供了可调节的感应平台.
- 反氧化离子传输提供了一种控制纳米孔行为的机制.
- 开发的系统显示了高度敏感的微量分析剂检测的潜力.
相关概念视频
01:28Electron Transport Chains
85.6K
The final stage of cellular respiration is oxidative phosphorylation that consists of two steps: the electron transport chain and chemiosmosis. The electron transport chain is a set of proteins found in the inner mitochondrial membrane in eukaryotic cells. Its primary function is to establish a proton gradient that can be used during chemiosmosis to produce ATP and generate electron carriers, such as NAD+ and FAD, that are used in glycolysis and the citric acid cycle.
The ETC is comprised of...
The ETC is comprised of...
85.6K
01:19Facilitated Transport
14.6K
The chemical and physical properties of plasma membranes cause them to be selectively permeable. Since plasma membranes have both hydrophobic and hydrophilic regions, substances need to be able to transverse both regions. The hydrophobic area of membranes repels substances such as charged ions. Therefore, such substances need special membrane proteins to cross a membrane successfully. In facilitated transport, also known as facilitated diffusion, molecules and ions travel across a...
14.6K