Ta4FeTe4: a new material for metallic single molecular wires
Institut für Anorganische Chemie und Analytische Chemie Johannes Gutenberg-Universität Duesbergweg 10-14, 55099 Mainz, Germany
Received: 19 October 2011
Published online: 27 June 2012
Bulk Ta4FeTe4 is a highly anisotropic metallic compound consisting of single molecular wires. In the crystalline bulk phase, sub-nanometer wires self-assemble to form a hexagonal packing of rods resulting in a fibrous crystal morphology. In this work we report the synthesis and crystal growth of single crystalline Ta4FeTe4 nanowire bundles with a length of several millimeters and an aspect ratio exceeding > 105. The nanowire bundle diameter could further be decreased by intercalation-exfoliation. Our results show that depending on the unbundling method nanowires of different length and diameter are accessible. A complete unbundling to single molecular wires of 7.9 Å is feasible with this methodology. As the Ta4FeTe4 nanowires are held together only by van der Waals interactions the properties of single molecular wires may be expected similar to those of the metallic bulk material.
Key words: Topical Issue: From photophysics to optoelectronics of zero- and one-dimensional nanomaterials
© EDP Sciences, Società Italiana di Fisica and Springer-Verlag, 2012