News Column

Researchers from University of Nantes Discuss Findings in Nanowires

June 25, 2014



By a News Reporter-Staff News Editor at Journal of Engineering -- Research findings on Nanowires are discussed in a new report. According to news reporting from Nantes, France, by VerticalNews journalists, research stated, "In this paper, we report on novel hybrid nanowires as prototypical building blocks for nanocomponents. Multisegmented hybrid nanowires (HNWs) made of metallic and conjugated polymer (CP) segments were elaborated and the impact of metal/polymer interfaces on the rectifying behavior was determined."

The news correspondents obtained a quote from the research from the University of Nantes, "Using HNWs integrated into micromachined devices, the relationship between electronic properties and original structure is revealed. a) By combining transmission electron microscopy (TEM) directly on the symmetric and asymmetric HNWs structures studied by current-voltage (I-V) spectroscopy, we show that rectifying I-V characteristics are observed only for asymmetric HNWs. Moreover, it is shown that the rectification ratio can be improved up to 3 orders of magnitude by a proper selection of the HNW composition. While the rectifying behavior is observed in HNWs after oxidative or acid doping, the charge transport mechanism in as-synthesized HNWs is bulk-limited and independent from their structure. Both symmetric and asymmetric HNWs exhibit Ohmic and nonlinear I-V curves above and below T-NL approximate to 120 K, respectively. These electrical behaviors are consistent with a progressive transition from an Ohmic to a non-Ohmic variable-range-hopping (VRH) mechanism."

According to the news reporters, the research concluded: "We discuss the origin of these nonlinearities, comparing the two- and four-probe measurements on single HNWs, and we propose a simple model based on dual back-to-back Schottky diodes to explain qualitatively the rectifying properties."

For more information on this research see: Engineering Nonlinear Electrical Behavior with Asymmetric Multisegmented Polymer-Metal Nanowires. Journal of Physical Chemistry C, 2014;118(18):9385-9394. Journal of Physical Chemistry C can be contacted at: Amer Chemical Soc, 1155 16TH St, NW, Washington, DC 20036, USA. (American Chemical Society - www.acs.org; Journal of Physical Chemistry C - www.pubs.acs.org/journal/jpccck)

Our news journalists report that additional information may be obtained by contacting L. Gence, Univ Nantes, CNRS, UMR6502, Inst Mat Jean Rouxel, Nantes, France. Additional authors for this research include V. Callegari, S. Demoustier-Champagne and J.L. Duvail.

Keywords for this news article include: Nantes, France, Europe, Engineering, Nanotechnology, Emerging Technologies

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Source: Journal of Engineering