Featured Research

from universities, journals, and other organizations

New material synthesized: Graphene nanoribbons inside of carbon nanotubes

Date:
September 15, 2011
Source:
UmeŚ University
Summary:
Physicists from Sweden and Finland have found an efficient way to synthesize graphene nanoribbons directly inside of single-walled carbon nanotubes.

High resolution TEM images of graphene nanoribbons encapsulated in SWNTs, simulated structures of flat and helical nanoribbons inside of nanotubes and scheme of chemical reaction which results in formation of nanoribbons from coronene and perylene molecules.
Credit: Image courtesy of UmeŚ University

Physicists from UmeŚ University (Sweden) and Finland have found an efficient way to synthesize graphene nanoribbons directly inside of single-walled carbon nanotubes.

Related Articles


The result was recently published in the journal Nano Letters.

Graphene, a one atom thin flake of plain carbon, has a wide range of unusual and highly interesting properties. As a conductor of electricity it performs as well as copper. As a conductor of heat it outperforms all other known materials. There are possibilities to achieve strong variations of the graphene properties by making graphene in the form of belts with various widths, so called nanoribbons. These nanoribbons are now the real focus of attention in physics and an extremely promising material for electronics, solar cells and many other things. However, it is has not been easy to make such ribbons.

Associate professor Alexandr Talyzin and his research group at the Department of Physics, UmeŚ University, have together with colleagues from Professor Esko Kauppinenīs group, Aalto University in Finland, discovered a way to use the hollow space inside carbon nanotubes as a one-dimensional chemical reactor to make encapsulated graphene. An intriguing property of this space is that chemical reactions occur differently here compared to under bulk three-dimensional conditions.

"We used coronene and perylene, which are large organic molecules, as building blocks to produce long and narrow graphene nanoribbons inside the tubes. The idea of using these molecules as building blocks for graphene synthesis was based on our previous study," says Talyzin.

This study revealed that coronene molecules can react with each other at certain conditions to form dimers, trimers and longer molecules in a bulk powder form. The result suggested that coronene molecules can possibly be used for synthesis of graphene but need to be somehow aligned in one plane for the required reaction. The inner space of single-walled carbon nanotubes seemed to be an ideal place to force molecules into the edge-to-edge geometry required for the polymerization reaction.

In the new study, the researchers show that this is possible. When the first samples were observed by electron microscopy by Ilya Anoshkin at Aalto University, exciting results were revealed: all nanotubes were filled inside with graphene nanoribbons.

"The success of the experiments also depended a lot on the choice of nanotubes. Nanotubes of suitable diameter and in high quality were provided by our co-authors from Aalto University," says Talyzin.

Later the researchers found that the shape of encapsulated graphene nanoribbons can be modified by using different kinds of aromatic hydrocarbons. The properties of nanoribbons are very different depending on their shape and width. For example, nanoribbons can be either metallic or semiconducting depending on their width and type. Interestingly, carbon nanotubes can also be metallic, semiconducting (depending on their diameter) or insulating when chemically modified.

"This creates an enormous potential for a wide range of applications. We can prepare hybrids that combine graphene and nanotubes in all possible combinations in the future," says Talyzin.

For example, metallic nanoribbons inside insulating nanotubes are very thin insulated wires. They might be used directly inside carbon nanotubes to produce light thus making nano-lamps. Semiconducting nanoribbons can possibly be used for transistors or solar cell applications and metallic-metallic combination is in fact a new kind of coaxial nano-cable, macroscopic cables of this kind are used e.g. for transmitting radio signals.

The new method of hybrid synthesis is very simple, easily scalable and allows obtaining almost 100 percent filling of tubes with nanoribbons. The theoretical simulations, performed by Arkady Krasheninnikov in Finland, also show that the graphene nanoribbons keep their unique properties inside the nanotubes while protected from the environment by encapsulation and aligned within bundles of single-walled nanotubes.

"The new material seems very promising, but we have a lot of inter-disciplinary work ahead of us in the field of physics and chemistry. To synthesize the material is just a beginning. Now we want to learn its electric, magnetic and chemical properties and how to use the hybrids for practical applications," says Talyzin.


Story Source:

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


Journal Reference:

  1. Alexandr V. Talyzin, Ilya V. Anoshkin, Arkady V. Krasheninnikov, Risto M. Nieminen, Albert G. Nasibulin, Hua Jiang, Esko I. Kauppinen. Synthesis of Graphene Nanoribbons Encapsulated in Single-Walled Carbon Nanotubes. Nano Letters, 2011; 110902093500003 DOI: 10.1021/nl2024678

Cite This Page:

UmeŚ University. "New material synthesized: Graphene nanoribbons inside of carbon nanotubes." ScienceDaily. ScienceDaily, 15 September 2011. <www.sciencedaily.com/releases/2011/09/110914073159.htm>.
UmeŚ University. (2011, September 15). New material synthesized: Graphene nanoribbons inside of carbon nanotubes. ScienceDaily. Retrieved December 19, 2014 from www.sciencedaily.com/releases/2011/09/110914073159.htm
UmeŚ University. "New material synthesized: Graphene nanoribbons inside of carbon nanotubes." ScienceDaily. www.sciencedaily.com/releases/2011/09/110914073159.htm (accessed December 19, 2014).

Share This


More From ScienceDaily



More Matter & Energy News

Friday, December 19, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Building Google Into Cars

Building Google Into Cars

Reuters - Business Video Online (Dec. 19, 2014) ó Google's next Android version could become the standard that'll power your vehicle's entertainment and navigation features, Reuters has learned. Fred Katayama reports. Video provided by Reuters
Powered by NewsLook.com
AP Review: Nikon D750 and GoPro Hero 4

AP Review: Nikon D750 and GoPro Hero 4

AP (Dec. 19, 2014) ó What to buy an experienced photographer or video shooter? There is some strong gear on the market from Nikon and GoPro. The AP's Ron Harris takes a closer look. (Dec. 19) Video provided by AP
Powered by NewsLook.com
Double-Amputee Becomes First To Move Two Prosthetic Arms With His Mind

Double-Amputee Becomes First To Move Two Prosthetic Arms With His Mind

Buzz60 (Dec. 19, 2014) ó A double-amputee makes history by becoming the first person to wear and operate two prosthetic arms using only his mind. Jen Markham has the story. Video provided by Buzz60
Powered by NewsLook.com
Navy Unveils Robot Fish

Navy Unveils Robot Fish

Reuters - Light News Video Online (Dec. 18, 2014) ó The U.S. Navy unveils an underwater device that mimics the movement of a fish. Tara Cleary reports. Video provided by Reuters
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:

More Coverage


New Hybrid Carbon Material Discovered

Sep. 21, 2011 ó A new hybrid carbon material, which combines graphene and nanotubes in the form of graphene nanoribbons encapsulated into single-walled carbon nanotubes -- has been discovered by researchers in ... read more

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