Evidence for metal-like electronic contribution in low-temperature heat capacity of polypyrrole
| Autor: | Tariq H. Gilani |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Free electron model
Materials science Inorganic chemistry Fermi level Doping Analytical chemistry Atmospheric temperature range Polypyrrole Heat capacity Surfaces Coatings and Films Metal chemistry.chemical_compound symbols.namesake chemistry visual_art Hexafluorophosphate Materials Chemistry visual_art.visual_art_medium symbols Physical and Theoretical Chemistry |
| Zdroj: | The journal of physical chemistry. B. 109(41) |
| ISSN: | 1520-6106 |
| Popis: | Heat capacity measurements in the temperature range of 0.6 to 12 K have been conducted on doped polypyrrole films. At low temperature, a finite electronic contribution gamma prevails in all samples. The value of gamma for hexafluorophosphate doped polypyrrole PPy(PF6) is 6.31 mJ x K(-2) x mol(-1), but is 2.2 mJ x K(-2) x mol(-1) for p-toluene sulfonate doped polypyrrole PPy(TsO). With use of the free electron model, the corresponding densities of states at the Fermi level N(E(F)) are calculated and compared with those obtained from spin susceptibility data. |
| Databáze: | OpenAIRE |
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