相关实验视频
Updated: Jun 17, 2026

08:51
Monitoring Protein Adsorption with Solid-state Nanopores
Published on: December 2, 2011
纳米镜式通道网格与受控的无otropic 湿
Nature
|January 26, 2000
概括
研究人员开发了一种新的,不需要 lithography 的方法来创建纳米尺寸的表面图案. 这种技术控制了湿性质,使精确的液体通道能够用于先进的分子模式和多升液体运输.
科学领域:
- 材料科学 材料科学 材料科学
- 表面化学 表面化学
- 纳米技术纳米技术
背景情况:
- 微观的表面结构控制着诸如粘附,摩擦和湿透等物理性质.
- 表面特性中的异质性对于分子相互作用,选择性吸附和识别至关重要.
- 微米以下的道使得极小的物质量能够进行化学反应.
研究的目的:
- 提出一种快速,简单,不需要 lithography 的方法来生成纳米尺度图案表面.
- 为了在延伸的表面上实现受控的湿特性.
- 为了使用这些表面,使分子和纳米集群的精确图案.
主要方法:
- 在单分子层转移到固体基板时利用湿不稳定性.
- 产生有图案的表面与控制的纳米级湿性质.
- 采用有图案的表面作为模板用于分子和纳米集群沉积.
主要成果:
- 成功创建了具有控制的纳米级湿性能的延伸图案表面.
- 实现了分子和纳米集群的模式化,使其成为密度高达2万厘米的平行通道.
- 证明了这些通道对每升液体的运输特性.
结论:
- 开发的技术提供了一个快速而简单的方法,在没有 lithography 的纳米尺度表面图案.
- 这些有图案的表面作为高密度分子和纳米团排列的有效模板.
- 这种方法可以更精确地控制液体运输在每升级上.
相关概念视频
Ion Channels
The movement of ions like sodium, potassium, and calcium into and out of the cell is essential to maintain the electrochemical gradient in living cells. The ion channels—a class of membrane transport proteins—help maintain this ionic gradient for the smooth functioning of physiological activities such as maintaining cell size and volume, conducting nerve impulses, and gas and nutrient exchange.
Ion channels are specialized integral membrane proteins on the plasma membrane that allow specific...
Ion channels are specialized integral membrane proteins on the plasma membrane that allow specific...
Non-gated Ion Channels
Ion channels are specialized proteins on the plasma membrane that allow charged ions to pass down their electrochemical gradient. Their main function is to maintain the membrane potential which is critical for cell viability. These channels are either gated or non-gated and can transport more than a thousand ions within milliseconds for the cellular event to occur.
Compared to the gated ion channels, the non-gated channels, also known as leakage or passive channels, have no gating mechanism.
Compared to the gated ion channels, the non-gated channels, also known as leakage or passive channels, have no gating mechanism.
Mechanically-gated Ion Channels
Mechanically-gated ion channels are proteins found in eukaryotic and prokaryotic cell membranes that open in response to mechanical stress. Tension, compression, swelling, and shear stress can alter the conformation of the protein, opening a transmembrane channel that allows the passage of ions for signal transmission. In eukaryotes, mechanically-gated channels are distributed in several regions like the neurons, lungs, skin, bladder, and heart, where they play critical roles in numerous...
Non-gated Ion Channels
Ion channels are specialized proteins on the plasma membrane that allow charged ions to pass down their electrochemical gradient. Their main function is to maintain the membrane potential which is critical for cell viability. These channels are either gated or non-gated and can transport more than a thousand ions within milliseconds for the cellular event to occur.
Compared to the gated ion channels, the non-gated channels, also known as leakage or passive channels, have no gating mechanism.
Compared to the gated ion channels, the non-gated channels, also known as leakage or passive channels, have no gating mechanism.
Ligand-Gated Ion Channel Receptor: Gating Mechanism
Ligand-gated ion channels are transmembrane proteins that play a vital role in intercellular communication and functions of the nervous system. They allow the influx of ions across the membrane once the neurotransmitter binds, allowing the subsequent transmission of electrical excitation across the neurons. Other ligand-gated ion channels, like the γ-aminobutyric acid (GABA) receptor, permit anions like chloride into the cells on the binding of the GABA molecule. Their entry into the cell...
Mechanically-gated Ion Channels
Mechanically-gated ion channels are proteins found in eukaryotic and prokaryotic cell membranes that open in response to mechanical stress. Tension, compression, swelling, and shear stress can alter the conformation of the protein, opening a transmembrane channel that allows the passage of ions for signal transmission. In eukaryotes, mechanically-gated channels are distributed in several regions like the neurons, lungs, skin, bladder, and heart, where they play critical roles in numerous...

