Featured Research

from universities, journals, and other organizations

Beyond graphene: Controlling properties of 2-D materials

Date:
April 28, 2014
Source:
University of Manchester
Summary:
Researchers have shown how they can control the properties of stacks of two-dimensional materials, opening up opportunities for new, previously-unimagined electronic devices. The next step is to combine several of these crystals in a 3D stack. This way, one can create 'heterostructures' with novel functionalities -- capable of delivering applications as yet beyond the imagination of scientists and commercial partners.

The isolation of graphene at the University in 2004 led to the discovery of many other 2D crystals. While graphene has an unrivalled set of superlatives, these crystals cover a large range of properties: from the most conductive to isolating, from transparent to optically active.

Related Articles


The next step is to combine several of these crystals in a 3D stack. This way, one can create 'heterostructures' with novel functionalities -- capable of delivering applications as yet beyond the imagination of scientists and commercial partners.

The first examples of such heterostructures already exist: tunnelling transistors, resonant tunnelling diodes, and solar cells.

Writing in Nature Physics, the scientists, led by Nobel Laureate Sir Kostya Novoselov, demonstrate that layers in such stacks can interact strongly, which helps the researchers learn how to control the properties of such heterostructures.

By controlling the relative orientation between graphene and underlying boron nitride -- one of the 2D materials and an excellent insulator -- the team can reconstruct the crystal structure of graphene. This leads to creation of local strains in graphene and even opening of a band-gap, which might be useful for the functionality of many electronic devices.

Professor Novoselov said: "Research on heterostructures is gaining momentum, and such possibilities for controlling the properties of heterostructures might become very useful for future applications."

PhD student Colin Woods, the researcher who carried out the vast majority of the work, said: "It was extremely exciting to see that the properties of graphene can change so dramatically by simply twisting the two crystals only a fraction of a degree.

"Generally, the previous model used to describe the sort of interaction which has been observed in our experiments describes only the 1-dimensional case, but even there it produces very nontrivial solutions.

"We hope that our system will push the mathematical development of the model to two-dimensions, where even more exciting mathematics is to be expected."


Story Source:

The above story is based on materials provided by University of Manchester. Note: Materials may be edited for content and length.


Journal Reference:

  1. C. R. Woods, L. Britnell, A. Eckmann, R. S. Ma, J. C. Lu, H. M. Guo, X. Lin, G. L. Yu, Y. Cao, R.V. Gorbachev, A. V. Kretinin, J. Park, L. A. Ponomarenko, M. I. Katsnelson, Yu.N. Gornostyrev, K. Watanabe, T. Taniguchi, C. Casiraghi, H-J. Gao, A. K. Geim, K.S. Novoselov. Commensurate–incommensurate transition in graphene on hexagonal boron nitride. Nature Physics, 2014; DOI: 10.1038/nphys2954

Cite This Page:

University of Manchester. "Beyond graphene: Controlling properties of 2-D materials." ScienceDaily. ScienceDaily, 28 April 2014. <www.sciencedaily.com/releases/2014/04/140428121214.htm>.
University of Manchester. (2014, April 28). Beyond graphene: Controlling properties of 2-D materials. ScienceDaily. Retrieved November 29, 2014 from www.sciencedaily.com/releases/2014/04/140428121214.htm
University of Manchester. "Beyond graphene: Controlling properties of 2-D materials." ScienceDaily. www.sciencedaily.com/releases/2014/04/140428121214.htm (accessed November 29, 2014).

Share This


More From ScienceDaily



More Matter & Energy News

Saturday, November 29, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Magnetic Motors, Not Cables, Power This Elevator

Magnetic Motors, Not Cables, Power This Elevator

Newsy (Nov. 28, 2014) Imagine an elevator without cables. ThyssenKrupp has drafted an elevator concept that would cruise on linear magnetic motors. Video provided by Newsy
Powered by NewsLook.com
NASA's First 3-D Printer In Space Creates Its First Object

NASA's First 3-D Printer In Space Creates Its First Object

Newsy (Nov. 26, 2014) The International Space Station is now using a proof-of-concept 3D printer to test additive printing in a weightless, isolated environment. Video provided by Newsy
Powered by NewsLook.com
Bolivian Recycling Initiative Turns Plastic Waste Into School Furniture

Bolivian Recycling Initiative Turns Plastic Waste Into School Furniture

Reuters - Innovations Video Online (Nov. 26, 2014) Innovative recycling project in La Paz separates city waste and converts plastic garbage into school furniture made from 'plastiwood'. Tara Cleary reports. Video provided by Reuters
Powered by NewsLook.com
Blu-Ray Discs Getting Second Run As Solar Panels

Blu-Ray Discs Getting Second Run As Solar Panels

Newsy (Nov. 26, 2014) Researchers at Northwestern University are repurposing Blu-ray movies for better solar panel technology thanks to the discs' internal structures. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Space & Time

Matter & Energy

Computers & Math

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins