Structure and optical properties of polycarbonate films with microcrystallites of BEDT-TTF polyiodides
| Autor: | Adam Tracz, Jürgen P. Rabe, Jacek Ulanski, J.K. Jeszka, Tadeusz Pakula |
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| Rok vydání: | 1998 |
| Předmět: |
Thin layers
Stereochemistry Scanning electron microscope Mechanical Engineering Metals and Alloys Crystal structure Condensed Matter Physics Electronic Optical and Magnetic Materials chemistry.chemical_compound Crystallography chemistry Mechanics of Materials visual_art Microscopy X-ray crystallography Materials Chemistry visual_art.visual_art_medium Polycarbonate Thin film Tetrathiafulvalene |
| Zdroj: | Scopus-Elsevier |
| ISSN: | 0379-6779 |
| DOI: | 10.1016/s0379-6779(97)04132-5 |
| Popis: | The morphology, structure and optical properties of thin layers of crystalline bis(ethylenedithio)tetrathiafulvalene (BEDT-TTF or ET) polyiodides formed within the surface layer of polycarbonate film were investigated. The samples were obtained by exposing the polymer films containing 2 wt.% of molecularly dispersed ET to vapors of I 2 /CH 2 Cl 2 solutions of different I 2 concentration. X-ray diffraction, scanning electron microscopy (SEM) and atomic force microscopy (AFM) show that, depending on the preparation conditions, ET polyiodides form plate-like crystals, flakes and some less organized layer covering microcrystallites. In all cases only (001) reflexes attributed to the α-ET 2 I 3 phase were registered in the X-ray diffraction (XRD) experiments. Reaction of iodine with already formed crystals leads to new morphological structures. Using saturated iodine solutions the nonconducting polyiodides are formed which, under ambient conditions, undergo transformation into a stable conducting salt. |
| Databáze: | OpenAIRE |
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