Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > Press > Can the Newest Form of Carbon Be Made to Bend, Twist and Roll?

Abstract:
Can graphene—a newly discovered form of pure carbon that may one day replace the silicon in computers, televisions, mobile phones and other common electronic devices—be made to bend, twist and roll?

By Kim McDonald

Can the Newest Form of Carbon Be Made to Bend, Twist and Roll?

La Jolla, CA | Posted on April 22nd, 2010

Physicists at UC San Diego and Boston University think so. In a paper published in the journal Physical Review B, the scientists say the propensity of graphene—a single layer of carbon atoms arranged in a honeycomb lattice— to stick to itself and form carbon "nanoscrolls" could be controlled electrostatically to form a myriad of new devices.

Unlike carbon nanotubes—cylindrical molecules of pure carbon with novel properties that have become the focus of much of the attention of new application in electronics and materials development—carbon nanoscrolls retain open edges and have no caps.

"As a result, nanoscrolls can change their shape and their inner and outer diameters, while nanotubes cannot," said Michael Fogler, an associate professor of physics at UCSD and the first author of the paper.

Working with Antonio Castro Neto, a physics professor at Boston University, and Francisco Guinea of the Institute of Materials Science in Madrid, the scientists proposed the construction of a device in which the electronic properties of graphene are used to roll and unroll the nanoscroll.

"The device we envision is a graphene nanoscroll that can be charged by current from a nearby electrode," said Fogler. "The more charged it becomes, the more the mutual electrostatic repulsion of electrons inside the scroll causes it to unwrap. So, the voltage on the electrode can control the diameter and the number of coils in the scroll."

"We show in this paper that the electrostatic control of nanoscrolls is very much feasible. The required voltages are in the practical range. Since graphene is so light, the wrapping and unwrapping would occur on a time scale of one-trillionth of a second. So, not only the degree of scrolling can be controlled, these nano-electromechanical devices will also be ultra-fast."

Fogler said such nanoscrolls could have a wide range of applications, such as actuators whose operation resembles the blinking of one's eyes, valves in lab-on-a-chip devices and even a form of electronic paper. Previously, other scientists attempted to build scroll "machines" using thin plastic films but they were either too rigid or too frail to work well. In contrast, nanoscrolls made of graphene, which is mechanically stronger than any other material known to man, would be robust, yet remain ultra-light and ultra-flexible. They would also conduct electricity more than a thousand times better than silicon.

Fogler said that the ideas to use electrical properties of graphene to modify its structure, or vice versa, are still quite new, and so the proposed devices may require some time to develop. In the near term, scientists hope that graphene, which is an optically transparent conductor of electricity, could be used to replace current liquid crystal displays that employ thin metal-oxide films based on indium, a rare metal that is becoming increasingly expensive and likely to be in short supply within a decade.

An advance copy of the journal article appeared online this week at: link.aps.org/doi/10.1103/PhysRevB.81.161408

The study was funded by grants from the National Science Foundation and U.S. Department of Energy.

####

Contacts:
Media Contact:
Kim McDonald
(858) 534-7572

Copyright © University of California, San Diego

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

The power of perovskite: OIST researchers improve perovskite-based technology in the entire energy cycle, from solar cells harnessing power to LED diodes to light the screens of future electronic devices and other lighting applications August 18th, 2017

Gold nanostars and immunotherapy vaccinate mice against cancer: New treatment cures, vaccinates mouse in small proof-of-concept study August 18th, 2017

Researchers printed graphene-like materials with inkjet August 17th, 2017

Candy cane supercapacitor could enable fast charging of mobile phones August 17th, 2017

NEMS

Leti Scientists Participating in Sessions on Med Tech, Automotive Technologies, MEMS, Si-photonics and Lithography at SEMICON Europa: Teams also Will Demonstrate Technology Advances in Telecom, Data Fusion, Energy, Silicon Photonics and 3D Integration October 18th, 2016

Integration of novel materials with silicon chips makes new 'smart' devices possible July 25th, 2016

Nano-photonics meets nano-mechanics: Controlling on-chip nano-optics by graphene nano-opto-mechanics January 22nd, 2016

Mechanical quanta see the light January 20th, 2016

Govt.-Legislation/Regulation/Funding/Policy

Researchers printed graphene-like materials with inkjet August 17th, 2017

Freeze-dried foam soaks up carbon dioxide: Rice University scientists lead effort to make novel 3-D material August 16th, 2017

2-faced 2-D material is a first at Rice: Rice University materials scientists create flat sandwich of sulfur, molybdenum and selenium August 14th, 2017

Engineers pioneer platinum shell formation process – and achieve first-ever observation August 11th, 2017

Possible Futures

The power of perovskite: OIST researchers improve perovskite-based technology in the entire energy cycle, from solar cells harnessing power to LED diodes to light the screens of future electronic devices and other lighting applications August 18th, 2017

Gold nanostars and immunotherapy vaccinate mice against cancer: New treatment cures, vaccinates mouse in small proof-of-concept study August 18th, 2017

Researchers printed graphene-like materials with inkjet August 17th, 2017

Candy cane supercapacitor could enable fast charging of mobile phones August 17th, 2017

Academic/Education

Two Scientists Receive Grants to Develop New Materials: Chad Mirkin and Monica Olvera de la Cruz recognized by Sherman Fairchild Foundation August 16th, 2017

Moving at the Speed of Light: University of Arizona selected for high-impact, industrial demonstration of new integrated photonic cryogenic datalink for focal plane arrays: Program is major milestone for AIM Photonics August 10th, 2017

Graduate Students from Across the Country Attend Hands-on NanoCamp: Prominent scientists Warren Oliver, Ph.D., and George Pharr, Ph.D., presented a weeklong NanoCamp for hand-picked graduate students across the United States July 26th, 2017

The Physics Department of Imperial College, London, uses the Quorum Q150T to deposit metals and ITO to make plasmonic sensors and electric contact pads July 13th, 2017

Nanotubes/Buckyballs/Fullerenes/Nanorods

Regulation of two-dimensional nanomaterials: New driving force for lithium-ion batteries July 26th, 2017

Killing cancer in the heat of the moment: A new method efficiently transfers genes into cells, then activates them with light. This could lead to gene therapies for cancers July 9th, 2017

Tests show no nanotubes released during utilisation of nanoaugmented materials June 9th, 2017

Ag/ZnO-Nanorods Schottky diodes based UV-PDs are fabricated and tested May 26th, 2017

Announcements

The power of perovskite: OIST researchers improve perovskite-based technology in the entire energy cycle, from solar cells harnessing power to LED diodes to light the screens of future electronic devices and other lighting applications August 18th, 2017

Gold nanostars and immunotherapy vaccinate mice against cancer: New treatment cures, vaccinates mouse in small proof-of-concept study August 18th, 2017

Researchers printed graphene-like materials with inkjet August 17th, 2017

Candy cane supercapacitor could enable fast charging of mobile phones August 17th, 2017

Research partnerships

Researchers printed graphene-like materials with inkjet August 17th, 2017

Freeze-dried foam soaks up carbon dioxide: Rice University scientists lead effort to make novel 3-D material August 16th, 2017

2-faced 2-D material is a first at Rice: Rice University materials scientists create flat sandwich of sulfur, molybdenum and selenium August 14th, 2017

Moving at the Speed of Light: University of Arizona selected for high-impact, industrial demonstration of new integrated photonic cryogenic datalink for focal plane arrays: Program is major milestone for AIM Photonics August 10th, 2017

NanoNews-Digest
The latest news from around the world, FREE



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project