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1

Optical Absorption of Polymer Films Doped with BEDT-TTF Polyiodides

100%

Helberg H., Staerk D., Ulański J., Jeszka J.

Acta Physica Polonica A

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1995

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vol. 87

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issue 4-5

893-897

EN

Conducting reticulate doped polymeric films containing BEDT-TTF iodide crystalline network were annealed in order to transform the crystallites into crystal phases with metallic conductivity. Measured optical absorption spectra show that annealing shifts the absorption band to higher frequencies and increases the transparency of the films. This behavior corresponds to the transformation of the α-phase into the superconducting α_{t}-phase observed in (BEDT-TTF)_{2}I_{3} single crystals.

2

Segregated network polymer/carbon nanotubes composites

88%

Mierczynska A., Friedrich J., Maneck H., Boiteux G., Jeszka J.

Open Chemistry

|

2004

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vol. 2

|

issue 2

363-370

EN

In this work we present the preparation of conductive polyethylene/carbon nanotube composites based on the segregated network concept. Attention has been focused on the effect of decreasing the amount of filler necessary to achieve low resistivity. Using high- and low-grade single-walled carbon nanotube materials we obtained conductive composites with a low percolation threshold of 0.5 wt.% for high-grade nanotubes, about 1 wt% for commercial nanotubes and 1.5 wt% for low-grade material. The higher percolation threshold for low-grade material is related to low effectiveness of other carbon fractions in the network formation. The electrical conductivity was measured as a function of the single-walled carbon nanotubes content in the polymer matrix and as a function of temperature. It was also found that processing parameters significantly influenced the electrical conductivity of the composites. Raman spectroscopy was applied to study single wall nanotubes in the conductive composites.

3

D.C. Conductivity of Polymer Composites with (BEDT-TTF)_{2}I_{3} Superconductor

76%

Ulański J., Jeszka J., Polanowski P., Głowacki I., Kryszewski M., Staerk D., Helberg H.

Acta Physica Polonica A

|

1995

|

vol. 87

|

issue 4-5

899-903

EN

Electrical properties of conducting reticulate doped polymeric films containing BEDT-TTF iodide crystalline network were investigated. Conditions of preparation of this kind of films i.e. time of doping by iodine vapours and time and temperature of annealing and their influence on transformation of the BEDT-TTF iodide crystallites into superconducting phase are discussed.

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2 Acta Physica Polonica A

1 Open Chemistry

1 2004

2 1995

3 Jeszka J.

2 Helberg H.

2 Staerk D.

2 Ulański J.

1 Boiteux G.

1 Friedrich J.

1 Głowacki I.

1 Kryszewski M.

1 Maneck H.

1 Mierczynska A.

1 Polanowski P.

Optical Absorption of Polymer Films Doped with BEDT-TTF Polyiodides

Segregated network polymer/carbon nanotubes composites

D.C. Conductivity of Polymer Composites with (BEDT-TTF)_{2}I_{3} Superconductor