Department of Physics, Indian Institute of Science, Bangalore, India.
Nanotechnology. 2010 Jan 29;21(4):045703. doi: 10.1088/0957-4484/21/4/045703. Epub 2009 Dec 10.
We report the growth of nanowires of the charge transfer complex tetrathiafulvalene-tetracyanoquinodimethane (TTF-TCNQ) with diameters as low as 130 nm and show that such nanowires can show Peierls transitions at low temperatures. The wires of sub-micron length were grown between two prefabricated electrodes (with sub-micron gap) by vapor phase growth from a single source by applying an electric field between the electrodes during the growth process. The nanowires so grown show a charge transfer ratio approximately 0.57, which is close to that seen in bulk crystals. Below the transition the transport is strongly nonlinear and can be interpreted as originating from de-pinning of CDW that forms at the Peierls transition.
我们报告了具有低至 130nm 直径的电荷转移配合物四硫富瓦烯-四氰基对醌二甲烷（TTF-TCNQ）纳米线的生长，并表明这种纳米线可以在低温下显示出 Peierls 转变。在生长过程中，通过在电极之间施加电场，从单个源在两个预制电极（具有亚微米间隙）之间通过气相生长来生长亚微米长度的线。所生长的纳米线显示出约 0.57 的电荷转移比，这接近于在体相中看到的电荷转移比。在转变以下，输运强烈非线性，可以解释为源自在 Peierls 转变时形成的 CDW 的去钉扎。
