In this thesis I characterize three graphene nanoribbons (with their precursors/monomers) with Raman and IR spectroscopic techniques. These systems have been synthesized from Dr. Ji Ma and coworkers, in the group led by Prof. Xinliang Feng, at the Technische Universität Dresden. The peculiarities of these systems are the following: the wavy graphene nanoribbon has a particular wavy conformation in space, while the other two nanoribbons present holes in their molecular structure. The characterization with Raman and IR spectroscopy has the aim to define if these peculiarities will influence their spectra with respect to other nanoribbons and graphene materials present in literature. Furthermore I try to assign the main peaks of these systems, through correlations with literature data. For the WGNR system I also study the trend of Raman spectra with varying temperature, observing an irregular behaviour with respect to what already seen for systems of the same kind.
In questa tesi caratterizzo con tecniche di spettroscopia Raman e IR tre nanoribbon grafenici (insieme ai loro precursori/monomeri). Questi sistemi sono stati sintetizzati dal Dr. Ji Ma e collaboratori, all’interno del gruppo guidato dal Prof. Xinliang Feng, alla Technische Universität Dresden. Le peculiarità di questi sistemi sono le seguenti: il wavy graphene nanoribbon ha una particolare conformazione ondulata nello spazio, mentre gli altri due nanoribbon presentano dei buchi all’interno della loro struttura molecolare. La caratterizzazione con spettroscopia Raman e IR ha l’obiettivo di definire se queste peculiarità influenzino gli spettri rispetto a quelli di altri nanoribbon e materiali grafenici presenti in letteratura. Inoltre in questa tesi cerco di assegnare tramite correlazioni con dati di letteratura i picchi principali di questi sistemi. Per il sistema WGNR studio anche l’andamento degli spettri Raman in temperatura, osservando un comportamento anomalo rispetto a quanto già visto per sistemi della stessa classe.
Raman and IR characterization of wavy and holey graphene nanoribbons
Zoia, Riccardo
2021/2022
Abstract
In this thesis I characterize three graphene nanoribbons (with their precursors/monomers) with Raman and IR spectroscopic techniques. These systems have been synthesized from Dr. Ji Ma and coworkers, in the group led by Prof. Xinliang Feng, at the Technische Universität Dresden. The peculiarities of these systems are the following: the wavy graphene nanoribbon has a particular wavy conformation in space, while the other two nanoribbons present holes in their molecular structure. The characterization with Raman and IR spectroscopy has the aim to define if these peculiarities will influence their spectra with respect to other nanoribbons and graphene materials present in literature. Furthermore I try to assign the main peaks of these systems, through correlations with literature data. For the WGNR system I also study the trend of Raman spectra with varying temperature, observing an irregular behaviour with respect to what already seen for systems of the same kind.File | Dimensione | Formato | |
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Executive_summary_Riccardo_Zoia_definitivo.pdf
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https://hdl.handle.net/10589/203870