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Three-dimensional carbon goes metallic

Date:
November 6, 2013
Source:
Virginia Commonwealth University
Summary:
A theoretical, three-dimensional form of carbon that is metallic under ambient temperature and pressure has been discovered by an international research team. The findings may significantly advance carbon science.
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FULL STORY

A theoretical, three-dimensional (3D) form of carbon that is metallic under ambient temperature and pressure has been discovered by an international research team.

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The findings, which may significantly advance carbon science, are published online this week in the Early Edition of the Proceedings of the National Academy of Sciences.

Carbon science is a field of intense research. Not only does carbon form the chemical basis of life, but it has rich chemistry and physics, making it a target of interest to material scientists. From graphite to diamond to Buckminster fullerenes, nanotubes and graphene, carbon can display in a range of structures.

But the search for a stable three-dimensional form of carbon that is metallic under ambient conditions, including temperature and pressure, has remained an ongoing challenge for scientists in the field.

Researchers from Peking University, Virginia Commonwealth University and Shanghai Institute of Technical Physics employed state-of-the-art theoretical methods to show that it is possible to manipulate carbon to form a three-dimensional metallic phase with interlocking hexagons.

"The interlocking of hexagons provides two unique features -- hexagonal arrangement introduces metallic character, and the interlocking form with tetrahedral bonding guarantees stability," said co-lead investigator Puru Jena, Ph.D., distinguished professor of physics in the VCU College of Humanities and Sciences.

The right combination of these properties could one day be applied to a variety of technologies.

"Unlike high-pressure techniques that require three terapascals of pressure to make carbon metallic, the studied structures are stable at ambient conditions and may be synthesized using benzene or polyacenes molecules," said co-lead investigator Qian Wang, Ph.D., who holds a professor position at Peking University and an adjunct faculty position at VCU.

"The new metallic carbon structures may have important applications in lightweight metals for space applications, catalysis and in devices showing negative differential resistance or superconductivity," Wang said.

According to Jena, the team is still early in its discovery process, but hope that these findings may move the work from theory to the experimental phase.

The study is titled, "Three-dimensional Metallic Carbon: Stable Phases with Interlocking Hexagons."

This research was supported by grants from the National Natural Science Foundation of China, grant numbers NSFC-11174014, NSFC-21273012; the National Grand Fundamental Research 973 Program of China, grant number 2012CB921404; and the U.S. Department of Energy, grant number DE-FG02-96ER45579.

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Story Source:

Materials provided by Virginia Commonwealth University. Original written by Sathya Achia Abraham. Note: Content may be edited for style and length.


Journal Reference:

  1. S. Zhang, Q. Wang, X. Chen, P. Jena. Stable three-dimensional metallic carbon with interlocking hexagons. Proceedings of the National Academy of Sciences, 2013; DOI: 10.1073/pnas.1311028110

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Virginia Commonwealth University. "Three-dimensional carbon goes metallic." ScienceDaily. ScienceDaily, 6 November 2013. <www.sciencedaily.com/releases/2013/11/131106114125.htm>.
Virginia Commonwealth University. (2013, November 6). Three-dimensional carbon goes metallic. ScienceDaily. Retrieved September 27, 2021 from www.sciencedaily.com/releases/2013/11/131106114125.htm
Virginia Commonwealth University. "Three-dimensional carbon goes metallic." ScienceDaily. www.sciencedaily.com/releases/2013/11/131106114125.htm (accessed September 27, 2021).

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