Langmuir-Blodgett films of One-dimensional Nanowires composed of Amphiphilic Tetrathiafulvalenes and Electron Acceptor

<jats:title>ABSTRACT</jats:title><jats:p>We found that novel amphiphilic tetrathiafulvalene (TTF; 1) organized into supramolecular assemblies by the addition of electron acceptor 2,3,5,6-tetrafluoro-7,7'f,8,8'f-tetracyano-<jats:italic>p</jats:italic>-quinodimethane (F<jats:sub>4</jats:sub>TCNQ) at the air-water interface. The assemblies on the air-water interface can be transferred onto the surface of mica and the morphologies of transferred films were investigated by AFM. The morphology of Langmuir-Blodgett films strongly depended on the ratio between <jats:bold>1</jats:bold> and F<jats:sub>4</jats:sub>TCNQ. Film of 1:1 mixture of <jats:bold>1</jats:bold> and F<jats:sub>4</jats:sub>TCNQ formed nanoscopic wires having an average dimension of 5.0 (height) × 70 (width) × 3000 (length) nm. On the other hand, the film of 2:1 mixture of <jats:bold>1</jats:bold> and F<jats:sub>4</jats:sub>TCNQ showed the mixed domains of wires and flat monolayers. Thus, the completely charge-transferred complex (<jats:bold>1</jats:bold><jats:sup>+</jats:sup>)(F<jats:sub>4</jats:sub>TCNQ<jats:sup>-</jats:sup>) formed one-dimensional nanowires having a micrometer length. Room temperature electrical conductivities of cast film for 1:1 and 2:1 mixed layers of <jats:bold>1</jats:bold> and F<jats:sub>4</jats:sub>TCNQ were 2.4 × 10<jats:sup>−4</jats:sup> and 8.0 × 10<jats:sup>−5</jats:sup> S cm<jats:sup>−1</jats:sup>, respectively.</jats:p>