The purpose of this work is to study, by electron paramagnetic resonance (EPR) techniques, both continuous wave and pulsed, new materials obtained by chemical exfoliation of intercalated graphite. The analysis of the EPR spectra enable to separate and to identify all the contributions to the EPR signals; particularly the relaxation times, g tensors’ values and the temperature dependence of the spin susceptibility are analyzed. A significant result obtained in this work is the identification of EPR signals due to charge carriers in isolated grapheme sheets. Other contributions are assigned to electrons localized in defects or in edge states or to charge carriers in graphitic systems
Studio tramite risonanza di spin elettronico di materiali grafenici di nuova produzione. An electron spin resonance study of new graphenic materials.
Tampieri, Francesco
2012/2013
Abstract
The purpose of this work is to study, by electron paramagnetic resonance (EPR) techniques, both continuous wave and pulsed, new materials obtained by chemical exfoliation of intercalated graphite. The analysis of the EPR spectra enable to separate and to identify all the contributions to the EPR signals; particularly the relaxation times, g tensors’ values and the temperature dependence of the spin susceptibility are analyzed. A significant result obtained in this work is the identification of EPR signals due to charge carriers in isolated grapheme sheets. Other contributions are assigned to electrons localized in defects or in edge states or to charge carriers in graphitic systemsFile | Dimensione | Formato | |
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https://hdl.handle.net/20.500.12608/16307