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Research Conducted at Korea Institute for Advanced Study Has Provided New Information about Molecular Wires (Anomalous length-independent frontier...

August 1, 2014



Research Conducted at Korea Institute for Advanced Study Has Provided New Information about Molecular Wires (Anomalous length-independent frontier resonant transmission peaks in armchair graphene nanoribbon molecular wires)

By a News Reporter-Staff News Editor at Science Letter -- Investigators publish new report on Molecular Wires. According to news reporting originating in Seoul, South Korea, by NewsRx journalists, research stated, "Molecular wires constitute the building blocks for nanoscale interconnects. However, the exponential decrease in conductance with wire length severely limits their applications."

The news reporters obtained a quote from the research from Korea Institute for Advanced Study, "We predict, using first principles calculations, that armchair graphene nanoribbon (AGNR) wires, connected by transverse zigzag edges to wider AGNR electrodes, can exhibit anomalous resonant transmission peaks that are nearly independent of the wire length. We propose a new model to explain the unusual length independence of peak energies from the locally repeating property of the wavefunction in the middle-AGNR. We further uncover that this locally repeating pattern originates from states of a perfect AGNR with infinite length. The pattern can be well preserved when the AGNR is connected to wider AGNR leads because of the zigzag edges serving as electron sources and drains. The length independence of peak widths results from the zigzag edges absorbing most of the wavefunction renormalization as the length increases, so that the coupling strength to the electrodes does not change significantly."

According to the news reporters, the research concluded: "These anomalous properties arising from intrinsic wavefunction properties of the AGNRs are in sharp contrast to typical transmission properties of traditional molecular wire junctions, which suggests promising potential application as 'molecular wire' interconnects in nano-electronics."

For more information on this research see: Anomalous length-independent frontier resonant transmission peaks in armchair graphene nanoribbon molecular wires. Carbon, 2014;76():285-291. Carbon can be contacted at: Pergamon-Elsevier Science Ltd, The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, England. (Elsevier - www.elsevier.com; Carbon - www.elsevier.com/wps/product/cws_home/258)

Our news correspondents report that additional information may be obtained by contacting S.C. Li, Korea Inst Adv Study, Seoul 130722, South Korea. Additional authors for this research include C.K. Gan, Y.W. Son, Y.P. Feng and S.Y. Quek (see also Molecular Wires).

Keywords for this news article include: Seoul, South Korea, Asia, Emerging Technologies, Molecular Wires, Nanotechnology

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Science Letter


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