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

Published online by Cambridge University Press:  01 February 2011

Yoko Tatewaki ,
Junko Takizawa ,
Tatsuya Hatanaka ,
Mutsumi Kimura  and
Hirofusa Shirai
Yoko Tatewaki
Affiliation:
[email protected], Shinshu univ., nano FIC, Ueda, Japan
Junko Takizawa
Affiliation:
[email protected], Shinshu univ., nano FIC, Ueda, Nagano, Japan
Tatsuya Hatanaka
Affiliation:
[email protected], Shinshu univ., Department of Functional Polymer Science, Ueda, Nagano, Japan
Mutsumi Kimura
Affiliation:
[email protected], Shinshu University, Faculty of Textile Science and Technology, Ueda, Japan
Hirofusa Shirai
Affiliation:
[email protected], Shinshu univ., nano FIC, Ueda, Nagano, Japan
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Abstract

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-p-quinodimethane (F4TCNQ) 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 1 and F4TCNQ. Film of 1:1 mixture of 1 and F4TCNQ 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 1 and F4TCNQ showed the mixed domains of wires and flat monolayers. Thus, the completely charge-transferred complex (1+)(F4TCNQ-) formed one-dimensional nanowires having a micrometer length. Room temperature electrical conductivities of cast film for 1:1 and 2:1 mixed layers of 1 and F4TCNQ were 2.4 × 10−4 and 8.0 × 10−5 S cm−1, respectively.

Keywords

nanostructureself-assemblyelectrical properties
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1144: Symposium LL – Nanowires–Systhesis, Properties, Assembly and Applications , 2008 , 1144-LL04-15
Copyright
Copyright © Materials Research Society 2009

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References

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