Related Experiment Video
Updated: Aug 27, 2025
11:42
Fabrication of Gate-tunable Graphene Devices for Scanning Tunneling Microscopy Studies with Coulomb Impurities
Published on: July 24, 2015
15.6K
Fast proton and water transport in ceramic membrane-based magic-angle graphene
Guoqing Wang1, Chen Chen1, Bayu Admasu Beshiwork1
1School of Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China.
Water Research
|September 26, 2022
Summary
Magic-angle graphene enhances proton and water transport in ceramic membranes, improving fuel cell efficiency. This novel material offers tunable properties for energy applications.
Area of Science:
- Materials Science
- Energy Science
- Nanotechnology
Background:
- Ceramic membranes are crucial for carbon-neutral energy devices but suffer from slow proton and water transport.
- Magic-angle graphene exhibits unique properties but lacks specific applications.
Purpose of the Study:
- To investigate the proton and water transport properties of ceramic membrane-based magic-angle graphene.
- To explore the potential of magic-angle graphene as a fast proton conductor for energy applications.
Main Methods:
- Investigated ionic conductivity and water transport in ceramic membrane-based magic-angle graphene.
- Analyzed twist-angle effects on proton and water transport using potential energy surface calculations.
- Constructed and tested a protonic ceramic membrane fuel cell using magic-angle graphene.
Main Results:
- Discovered twist-angle tuned proton conduction and water transport in magic-angle graphene.
- Demonstrated significantly faster proton and water transport in magic-angle graphene compared to pristine graphene.
- Achieved a ~50% reduction in protonic migration energy barrier in magic-angle graphene.
Conclusions:
- Magic-angle graphene offers tunable, enhanced proton and water transport properties.
- This material shows promise for high-performance protonic ceramic membrane fuel cells.
- Opens new applications for ceramic membrane-based magic-angle graphene in energy and environmental technologies.
Related Concept Videos
01:25Aquaporins
4.9K
Aquaporins or AQPs are a family of integral membrane proteins whose primary function is to transport water, while some called aquaglyceroporins also transport glycerol. In addition, aquaporins have also been suspected to be involved in transporting volatile substances, such as carbon dioxide and ammonia, across membranes. Such AQPs that act as gas channels are often highly expressed in cells involved in the gaseous exchange, such as red blood cells, epithelial cells, and pulmonary capillaries.
4.9K
01:27ATP Driven Pumps I: An Overview
8.5K
ATP-driven pumps, also known as transport ATPases, are integral membrane proteins. They have binding sites for ATP located on the membrane's cytosolic side and the ion-conducting domain in the transmembrane region. These pumps use the free energy released from ATP hydrolysis to move the solutes across cell membranes against an electrochemical gradient.
There are four main types of ATP-driven pumps - P-type, V-type, F-type, and ABC transporter. All these pumps are of varying complexities and...
There are four main types of ATP-driven pumps - P-type, V-type, F-type, and ABC transporter. All these pumps are of varying complexities and...
8.5K
01:17Pore Transport and Ion-Pair Transport
589
Pore transport and ion-pair formation are critical mechanisms for the absorption and distribution of drugs in the body.
Pore transport, also known as convective transport, is a process where small molecules like urea, water, and sugars rapidly cross cell membranes as though there were channels or pores in the membrane. Although direct microscopic evidence is limited but the concept of pores or channels is widely accepted based on physiological evidence. Despite the lack of direct...
Pore transport, also known as convective transport, is a process where small molecules like urea, water, and sugars rapidly cross cell membranes as though there were channels or pores in the membrane. Although direct microscopic evidence is limited but the concept of pores or channels is widely accepted based on physiological evidence. Despite the lack of direct...
589
01:19Facilitated Transport
13.1K
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...
13.1K
01:15Potentiometry: Membrane Electrodes
747
Membrane electrodes, also known as p-ion electrodes, use membranes that selectively interact with free analyte ions, generating a potential difference across the membrane. The resulting membrane potential, known as the asymmetry potential, is not zero even when analyte concentrations on both sides of the membrane are equal. The membrane's response is typically not selective to a single analyte but proportional to the concentration of all ions in the sample solution capable of interacting at...
747
01:44The Significance of Membrane Transport
28.8K
The transport of solutes across the cell membrane is essential for metabolic processes, like maintaining cell size and volume, generating the action potential, exchanging nutrients and gases, etc. Membrane transport can be either passive or active. It can be simple diffusion, facilitated, or mediated transport aided by transport proteins such as transporters and channels.
Transporters facilitate either an active or passive movement of solutes. They can allow a single-molecule transport down its...
Transporters facilitate either an active or passive movement of solutes. They can allow a single-molecule transport down its...
28.8K