'Artificlal graphene' breakthrough enables material to be tailored to each specific task

February 17, 2014 // By Jean-Pierre Joosting
A recent article in Physical Review X describes an artificial 2D material that behaves electronically like graphene or a topological-insulator. For the first time, scientists have been able to produce and analyse 'artificial graphene' from traditional semiconductor materials.

Graphene (derived from graphite) is a one atom thick honeycomb lattice of carbon atoms. This strong, flexible, conducting and transparent material has huge scientific and technological potential. Only discovered in 2004, there is a major global push to understand its potential uses. Artificial graphene has the same honeycomb structure, but in this case, instead of carbon atoms, nanometer-thick semiconductor crystals are used. Changing the size, shape and chemical nature of the nano-crystals, makes it possible to tailor the material to each specific task.

The University of Luxembourg is heavily involved in cross-border, multidisciplinary research projects. In this case it partnered with the Institute for Electronics, Microelectronics, and Nanotechnology (IEMN) in Lille, France, the Debye Institute for Nanomaterials Science and the Institute for Theoretical Physics of the University of Utrecht, Netherlands and the Max Planck Institute for the Physics of Complex Systems in Dresden, Germany.

University of Luxembourg researcher Dr. Efterpi Kalesaki, and lead author of the article in Physical Review X played an important role in this highly innovative work. Dr. Kalesaki said: “these self‐assembled semi-conducting nano-crystals with a honeycomb structure are emerging as a new class of systems with great potential.”

Prof Ludger Wirtz, head of the Theoretical Solid-State Physics group at the University of Luxembourg, added: “artificial graphene opens the door to a wide variety of materials with variable nano‐geometry and ‘tunable’ properties.”

The article can be accessed here: http://prx.aps.org/abstract/PRX/v4/i1/e011010.

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