THz TDS study of several sp2 carbon materials: Graphite, needle coke and graphene oxides. (March 2016)

• Record Type: Journal Article
• Authors: Chamorro-Posada, Pedro; Vázquez-Cabo, José; Rubiños-López, Óscar; Martín-Gil, Jesús; Hernández-Navarro, Salvador; Martín-Ramos, Pablo; Sánchez-Arévalo, Francisco M.; Tamashausky, Albert V.; Merino-Sánchez, César; Dante, Roberto C.
• Is Part Of: Carbon. Volume 98(2016)
• Page Start: 484
• Page End: 490
• Publication Date: 2016-03
• Subjects: Carbon -- Periodicals; Carbone -- Périodiques; Koolstof; Toepassingen; Electronic journals; 546.681
• DOI: 10.1016/j.carbon.2015.11.020
• Languages: English
• ISSNs: 0008-6223

Abstract

Abstract: Terahertz time-domain spectroscopy has been used to probe the properties of four carbon allotropes with a sequenced c -axis stacking order: single-layer reduced graphene oxide, few-layer graphene oxide, disordered needle coke and highly organized graphite. The results obtained demonstrate a very high sensitivity to the structural characteristics of the tested samples. The multi-layer materials show the same type of spectral response with strong variations in the attenuation in the whole terahertz band depending on their constructural organization. The single-layer sample shows a distinct response where conductive effects dominate. The results obtained are consistent with theoretical investigations using semi-empirical quantum chemistry methods.