相关实验视频

Updated: Jan 23, 2026

Atomically Traceable Nanostructure Fabrication

Atomically Traceable Nanostructure Fabrication

Published on: July 17, 2015

利用二维材料造聚合物相互作用,可进行可扩展的损坏密封原子薄膜的制造

Peifu Cheng¹, Pavan Chaturvedi¹, Piran R Kidambi^2,3,4

¹Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, Tennessee 37212, United States.

|January 22, 2026

概括

原子薄膜的可扩展合成是通过了解二维材料上的聚合物相位逆转来推进的. 这项研究揭示了石墨烯基底如何使多孔支形成,这对于选择性传输至关重要.

科学领域:

材料科学材料科学材料科学
化学工程是化学工程的重要组成部分.
纳米技术纳米技术

背景情况:

对2D材料的可扩展合成及其与多孔支物的集成对于先进的原子薄膜至关重要.
聚合物在二维材料上的相位逆转提供了直接通往多孔支的途径,但机制尚未完全理解.

研究的目的:

研究不同基板上的聚硫 (PES) 相逆转机制:裸铜,铜上的连续石墨烯和铜上的不连续石墨烯域.
了解基板相互作用如何影响由此产生的多孔支结构和膜运输特性.

主要方法:

系统地研究裸铜上的聚硫 (PES) 相逆转,铜上的连续化学蒸汽沉积 (CVD) 石墨烯,以及铜上的未合并的CVD石墨烯域.
使用模型溶液 (盐和生物分子) 进行由此产生的多孔支形态的表征和选择性运输性质的评估.

主要成果:

在赤裸的铜上,PES形成了密集的,无孔的支,阻碍了运输.
在连续CVD石墨烯上,PES形成多孔支 (300-500nm),方便运输.
在不连续的石墨烯域上,形成混合结构:在石墨烯上是多孔的,在铜上是密集的,使得具有选择性运输的损伤密封膜成为可能.

结论:

在相位逆转期间的基质粘附决定了多孔支结构和膜性能.
这项工作使得能够可扩展地制造具有可调节选择性的无损密封,原子薄膜.
二维材料是研究相反过程中聚合物脱现象的优秀平台.

关键词:

两维材料是二维材料.在CVD中使用Graphene.具有原子薄膜的原子薄膜.石墨烯膜石墨烯膜一个相位逆转的相位逆转.聚合物造中的聚合物造有选择性的膜.

更多相关视频

Indirect Fabrication of Lattice Metals with Thin Sections Using Centrifugal Casting

Indirect Fabrication of Lattice Metals with Thin Sections Using Centrifugal Casting

Published on: May 14, 2016

Scalable Fabrication of Stretchable, Dual Channel, Microfluidic Organ Chips

Scalable Fabrication of Stretchable, Dual Channel, Microfluidic Organ Chips

Published on: October 20, 2018

相关概念视频

Polymers

Polymers

The word polymer is derived from the Greek words “poly” which means “many” and “mer” which means “parts”. Polymers are long chains of molecules composed of repeating units of smaller molecules, known as monomers. They either occur naturally, such as DNA and proteins, or can be constructed synthetically, like plastics. They have varied structural characteristics, such as linear chains, branched chains, or complex networks, that contribute to the...

Polymers

Polymers

The Energies of Atomic Orbitals

The Energies of Atomic Orbitals

In an atom, the negatively charged electrons are attracted to the positively charged nucleus. In a multielectron atom, electron-electron repulsions are also observed. The attractive and repulsive forces are dependent on the distance between the particles, as well as the sign and magnitude of the charges on the individual particles. When the charges on the particles are opposite, they attract each other. If both particles have the same charge, they repel each other.

Atomic Structure

Atomic Structure

Atomic Mass

Atomic Mass

Atoms — and the protons, neutrons, and electrons that compose them — are extremely small. For example, a carbon atom weighs less than 2 × 10−23 g. When describing the properties of tiny objects such as atoms, we use appropriately small units of measure, such as the atomic mass unit (amu). The amu was originally defined based on hydrogen, the lightest element, then later in terms of oxygen. Since 1961, it has been defined with regard to the most abundant isotope of carbon, atoms of which...

Atomic Orbitals

Atomic Orbitals

An atomic orbital represents the three-dimensional regions in an atom where an electron has the highest probability to reside. The radial distribution function indicates the total probability of finding an electron within the thin shell at a distance r from the nucleus. The atomic orbitals have distinct shapes which are determined by l, the angular momentum quantum number. The orbitals are often drawn with a boundary surface, enclosing densest regions of the cloud.