| Autor: |
R. F. Frindt, D. Yang |
| Rok vydání: |
1998 |
| Předmět: |
|
| Zdroj: |
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals. 311:367-375 |
| ISSN: |
1058-725X |
| DOI: |
10.1080/10587259808042412 |
| Popis: |
WS2/PEO (poly-ethylene oxide, -CH2CH2O-) nanocomposites were prepared by direct flocculation when single layer WS2 in suspension in water was mixed with a PEO aqueous solution. As with earlier work on similar systems using MoS2, the resultant composite material is a remarkably well-ordered polymer-intercalated tungsten disulfide. The powder x-ray diffraction patterns contain (hk0) peaks of the two-dimensional type and (00I) peaks of the three-dimensional type. No mixed (hkl) peaks are observed. The diffraction clearly shows that the system is turbostratically restacked with the WS2 layers parallel to each other with an expanded interlayer spacing due to the insertion of PEO, but random in translation along the layers and in rotation about the normal to the layers. The host WS2 layers have a strongly distorted octahedral structure with a 2a0 superlattice and an expanded a-spacing. Very highly oriented WS2(PEO)1.4 thin films have been formed on glass substrates. We found that the interlayer spacing... |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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