液体金属表面上兰格穆尔薄膜的结构
H Kraack1, B M Ocko, P S Pershan
1Physics Department, Bar-Ilan University, Ramat Gan 52900, Israel.
Science (New York, N.Y.)
|November 16, 2002
概括
水银上的有机分子形成独特的结构,随着覆盖范围的增加,从平面向垂直方向过渡. 与固体表面相比,这为纳米结构的构建提供了新的可能性.
科学领域:
- 表面科学是一门科学.
- 材料科学是一种材料科学.
- 物理化学 物理化学
背景情况:
- 液体表面上的有机单层表现出复杂的结构.
- 分子相互作用极大地影响单层组织.
- 了解这些结构是先进材料设计的关键.
研究的目的:
- 为了研究酸在表面上的结构组织.
- 分析分子覆盖对单层结构的影响.
- 为了比较纳米结构的潜力与固体支的单层.
主要方法:
- 有机薄膜的高分辨率结构测量.
- 表面分析作为分子覆盖的函数.
- 分子导向和相位行为的表征.
主要成果:
- 在上酸显示了取决于覆盖范围的方向从平行到正常的过渡.
- 在高覆盖率下,观察到两种直立分子的紧缩六度相.
- 在低覆盖率下,发现了具有1D顺序的2D气体和凝聚二度相.
结论:
- 乙醇酸/系统表现出丰富的相位行为和结构过渡.
- 这种液体支的单层系统为纳米结构制造提供了更大的可调性.
- 建议在纳米技术和表面工程领域的潜在应用.
相关概念视频
01:34Fluid Mosaic Model
The fluid mosaic model was first proposed as a visual representation of research observations. The model comprises the composition and dynamics of membranes and serves as a foundation for future membrane-related studies. The model depicts the structure of the plasma membrane with a variety of components, which include phospholipids, proteins, and carbohydrates. These integral molecules are loosely bound, defining the cell’s border and providing fluidity for optimal function.LipidsThe most...
01:26Membrane Fluidity
Membrane fluidity is explained by the fluid mosaic model of the cell membrane, which describes the plasma membrane structure as a mosaic of components—including phospholipids, cholesterol, proteins, and carbohydrates—that gives the membrane a fluid character.
Mosaic nature of the membrane
The mosaic characteristic of the membrane helps the plasma membrane remain fluid. The integral proteins and lipids exist as separate but loosely-attached molecules in the membrane. The membrane is a relatively...
Mosaic nature of the membrane
The mosaic characteristic of the membrane helps the plasma membrane remain fluid. The integral proteins and lipids exist as separate but loosely-attached molecules in the membrane. The membrane is a relatively...
01:19Fluid Mosaic Model
Scientists identified the plasma membrane in the 1890s and its principal chemical components (lipids and proteins) by 1915. The model for plasma membrane structure, proposed in 1935 by Hugh Davson and James Danielli, was the first model to be widely accepted in the scientific community. The model was based on the plasma membrane's "railroad track" appearance in early electron micrographs. Davson and Danielli theorized that the plasma membrane's structure resembled a sandwich with the analogy of...