Tiny nanoribbons of carbon could be used to make a magnetic field sensor for novel electronic devices
Researchers in Singapore have designed an electronic switch that responds to changes in a magnetic field. The device relies on graphene, a strong and flexible electricity-conducting layer of carbon atoms arranged in a honeycomb pattern.
Seng Ghee Tan of the A*STAR Data Storage Institute, along with colleagues at the National University of Singapore, used theoretical models to predict the properties of their proposed device, known as a magnetic field-effect transistor.
The transistor is based on two nanoribbons of graphene, each just a few tens of nanometers wide, which are joined end to end. The atoms along the edges of these nanoribbons are arranged in an ‘armchair’ configuration — a pattern that resembles the indented battlements of castle walls. If these edges were in a zigzag pattern, however, the material would have different electrical properties.
One of the nanoribbons in the team’s transistor acts as a metallic conductor that allows electrons to flow freely; the other, slightly wider, nanoribbon is a semiconductor. Under normal conditions, electrons cannot travel from one nanoribbon to the other because their quantum wavefunctions — the probability of where electrons are found within the materials — do not overlap.
A magnetic field, however, warps the distribution of electrons, changing their wavefunctions until they overlap and allowing current to flow from one nanoribbon to the other. Using an external field to change the electrical resistance of a conductor in this way is known as a magnetoresistance effect.
The team calculated how electrons would travel in the nanoribbons under the influence of a 10-tesla magnetic field — the rough equivalent of that produced by a large superconducting magnet — at a range of different temperatures.
The Latest Bing News on:
Magnetic switch
- Keychron’s Q1 HE Magnetic Switch Keyboard Is The Ideal Tool For Gamerson May 17, 2024 at 2:59 am
This customizable keyboard from Keychron can have its switches set with variable actuations depths or points. The magnetic switches are ultra-responsive
- Switch 2 will have an 8-inch display and full backward compatibility, report claimson May 16, 2024 at 9:22 pm
If you were intrigued by the rumor about Nintendo bringing magnetic Joy-Con controllers to the Switch 2, you're going to want to see the extensive leak that followed. Over the weekend, third-party Switch accessory manufacturer Mobapad shared new details ...
- Scientists prove 'quantum theory' that could lead to ultrafast magnetic computingon May 16, 2024 at 4:00 am
Superfast magnetic memory devices are possible after scientists engineer way to use lasers to magnetize non-magnetic materials.
- A switch for the internal clock: Exploring quantum biology for novel medical therapieson May 13, 2024 at 12:48 pm
A research collaboration has explored the effects of nuclear magnetic resonance on the internal clock of cells at different times of day and under oxygen deprivation.
The Latest Google Headlines on:
Magnetic switch
[google_news title=”” keyword=”magnetic switch” num_posts=”10″ blurb_length=”0″ show_thumb=”left”]
The Latest Bing News on:
Graphene Nanoribbons
- Wonder Material 'More Remarkable' Than Graphene Has Medical Potentialon May 7, 2024 at 8:55 am
Scientists may have found a material "more remarkable" than graphene that presents a wealth of medical potential. Borophene is thinner, more conductive, lighter and stronger than graphene.
- How Are Graphene Nanoribbons Formed?on May 5, 2024 at 5:00 pm
2,3 Top-Down Fabrication The top-down approach focuses on synthesizing graphene and graphene nanoribbons by breaking down larger materials. It starts with graphite or carbon nanotubes and uses various ...
- Premier Graphene demonstrates graphene integration with building materialson April 18, 2024 at 3:34 pm
Premier Graphene has conducted in-house studies to showcase progress in the integration of graphene with construction materials. During the in-house studies, the company’s team was able to ...
- The Future of Electronics is Here: How Georgia Tech’s Innovative Graphene Chip Technology Transforms the Fieldon March 7, 2024 at 1:58 am
“There has been some success with graphene nanoribbons, but in principle this technology is very similar to semiconducting carbon-nanotube technology which has not been successful after 30 years ...
- Origin of the energy bandgap in epitaxial grapheneon February 19, 2024 at 10:13 am
in the preceding comment to account for the energy gap reported by us 1 in epitaxial graphene on 6H-SiC is unfounded. In our view, the effects of modulations on the lateral structure of graphene ...
- Graphene Nanoribbons From Merckon November 29, 2023 at 6:33 am
Let us help you with your inquiries, brochures and pricing requirements Request A Quote Download PDF Copy Request A Quote Download PDF Copy Request A Quote Download ...
- Introduction to Graphene-Based Nanomaterialson October 24, 2023 at 4:26 pm
Morresi, Tommaso Binosi, Daniele Simonucci, Stefano Piergallini, Riccardo Roche, Stephan Pugno, Nicola M and Simone, Taioli 2020. Exploring event horizons and Hawking ...
- Carbon Nanotube and Graphene Device Physicson June 14, 2023 at 2:07 am
Chen, Pai-Yen and Alu, Andrea 2013. Terahertz Metamaterial Devices Based on Graphene Nanostructures. IEEE Transactions on Terahertz Science and Technology, Vol. 3, Issue. 6, p. 748. Nguyen, Ngoc Hieu ...
- Graphene’s love affair with wateron November 10, 2021 at 6:10 pm
Graphene has proven itself as a wonder material with a vast range of unique properties. Among the least-known marvels of graphene is its strange love affair with water. Graphene is hydrophobic – it ...
- Global Graphene Companies – Manufacturers and Supplierson August 14, 2020 at 11:38 pm
Graphene is the name for a honeycomb sheet of carbon atoms. It is the strongest known material, yet it is also stretchy. It can conduct electricity 100x better than silicon and heat 10x better than ...
The Latest Google Headlines on:
Graphene Nanoribbons
[google_news title=”” keyword=”Graphene Nanoribbons” num_posts=”10″ blurb_length=”0″ show_thumb=”left”]