Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Research Shows Graphene Nanopores Can Be Controlled

04.10.2012
Less Costly Ways of Sequencing DNA Could Open New Possibilities for Disease Prevention

Engineers at The University of Texas at Dallas have used advanced techniques to make the material graphene small enough to read DNA.


These are transmission electron microscope images of a nanopore in graphene. The original pore on the left grows considerably under the influence of the electron beam. The image on the right is the pore after four minutes at 800 °C. Pores either shrink or grow depending on the temperature and electron beam irradiation.

Shrinking the size of a graphene pore to less than one nanometer – small enough to thread a DNA strand – opens the possibility of using graphene as a low-cost tool to sequence DNA.

“Sequencing DNA at a very cheap cost would enable scientists and doctors to better predict and diagnose disease, and also tailor a drug to an individual’s genetic code,” said Dr. Moon Kim, professor of materials science and engineering. He was senior author of an article depicted on the cover of the September print edition of Carbon.

... more about:
»DNA »DNA strand »carbon atom »graphene »nanopores

The first reading, or sequencing, of human DNA by the international scientific research group known as the Human Genome Project cost about $2.7 billion. Engineers have been researching alternative nanomaterials materials that can thread DNA strands to reduce the cost to less than $1,000 per person.

It was demonstrated in 2004 that graphite could be changed into a sheet of bonded carbon atoms called graphene, which is believed to be the strongest material ever measured. Because graphene is thin and strong, researchers have searched for ways to control its pore size. They have not had much success. A nanoscale sensor made of graphene could be integrated with existing silicon-based electronics that are very advanced and yet cheap, to reduce costs.

In this study, Kim and his team manipulated the size of the nanopore by using an electron beam from an advanced electron microscope and in-situ heating up to 1200 degree Celsius temperature.

“This is the first time that the size of the graphene nanopore has been controlled, especially shrinking it,” said Kim. “We used high temperature heating and electron beam simultaneously, one technique without the other doesn’t work.”

Now that researchers know the pore size can be controlled, the next step in their research will be to build a prototype device.

“If we could sequence DNA cheaply, the possibilities for disease prevention, diagnosis and treatment would be limitless,” Kim said. “Controlling graphene puts us one step closer to making this happen.”

Other UT Dallas researchers from the Erik Jonsson School of Engineering and Computer Science involved in this project are Dr. Ning Lu, research scientist in materials science and engineering; Dr. Jinguo Wang, associate EM Facility Director; and Dr. Herman Carlo Floresca, postdoctoral research fellow in materials science and engineering.

The study was funded by the Southwest Academy of Nanoelectronics, Air Force Office of Scientific Research and the World Class University Program.

Media Contact: LaKisha Ladson, UT Dallas, (972) 883-4183, lakisha.ladson@utdallas.edu

or the Office of Media Relations, UT Dallas, (972) 883-2155, newscenter@utdallas.edu

LaKisha Ladson | EurekAlert!
Further information:
http://www.UTDallas.edu

Further reports about: DNA DNA strand carbon atom graphene nanopores

More articles from Materials Sciences:

nachricht Think laterally to sidestep production problems
17.10.2017 | King Abdullah University of Science & Technology (KAUST)

nachricht Spin current detection in quantum materials unlocks potential for alternative electronics
16.10.2017 | DOE/Oak Ridge National Laboratory

All articles from Materials Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Neutron star merger directly observed for the first time

University of Maryland researchers contribute to historic detection of gravitational waves and light created by event

On August 17, 2017, at 12:41:04 UTC, scientists made the first direct observation of a merger between two neutron stars--the dense, collapsed cores that remain...

Im Focus: Breaking: the first light from two neutron stars merging

Seven new papers describe the first-ever detection of light from a gravitational wave source. The event, caused by two neutron stars colliding and merging together, was dubbed GW170817 because it sent ripples through space-time that reached Earth on 2017 August 17. Around the world, hundreds of excited astronomers mobilized quickly and were able to observe the event using numerous telescopes, providing a wealth of new data.

Previous detections of gravitational waves have all involved the merger of two black holes, a feat that won the 2017 Nobel Prize in Physics earlier this month....

Im Focus: Smart sensors for efficient processes

Material defects in end products can quickly result in failures in many areas of industry, and have a massive impact on the safe use of their products. This is why, in the field of quality assurance, intelligent, nondestructive sensor systems play a key role. They allow testing components and parts in a rapid and cost-efficient manner without destroying the actual product or changing its surface. Experts from the Fraunhofer IZFP in Saarbrücken will be presenting two exhibits at the Blechexpo in Stuttgart from 7–10 November 2017 that allow fast, reliable, and automated characterization of materials and detection of defects (Hall 5, Booth 5306).

When quality testing uses time-consuming destructive test methods, it can result in enormous costs due to damaging or destroying the products. And given that...

Im Focus: Cold molecules on collision course

Using a new cooling technique MPQ scientists succeed at observing collisions in a dense beam of cold and slow dipolar molecules.

How do chemical reactions proceed at extremely low temperatures? The answer requires the investigation of molecular samples that are cold, dense, and slow at...

Im Focus: Shrinking the proton again!

Scientists from the Max Planck Institute of Quantum Optics, using high precision laser spectroscopy of atomic hydrogen, confirm the surprisingly small value of the proton radius determined from muonic hydrogen.

It was one of the breakthroughs of the year 2010: Laser spectroscopy of muonic hydrogen resulted in a value for the proton charge radius that was significantly...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

ASEAN Member States discuss the future role of renewable energy

17.10.2017 | Event News

World Health Summit 2017: International experts set the course for the future of Global Health

10.10.2017 | Event News

Climate Engineering Conference 2017 Opens in Berlin

10.10.2017 | Event News

 
Latest News

Ocean atmosphere rife with microbes

17.10.2017 | Life Sciences

Neutrons observe vitamin B6-dependent enzyme activity useful for drug development

17.10.2017 | Life Sciences

NASA finds newly formed tropical storm lan over open waters

17.10.2017 | Earth Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>