Time-Resolved Photoluminescence and Elastic White Light Scattering Studies of Individual Carbon Nanotubes and Optical Characterization of Oxygen Plasma Treated Graphene [Elektronische Ressource] / Tobias Dominik Gokus. Betreuer: Achim Hartschuh

Dissertation zurErlangungdesDoktorgrades¨ ¨derFakultat furChemieundPharmaziederLudwig-Maximilians-Universitat¨ Munchen¨Time-ResolvedPhotoluminescenceandElasticWhiteLightScatteringStudiesofIndividualCarbonNanotubesandOptical CharacterizationofOxygen PlasmaTreated GraphenevonTobias Dominik GokusausKirchen (Sieg)2011Erklar¨ ungDieseDissertationwurdeimSinnevon§13Abs.3bzw.4derPromotionsordnungvom29.¨Januar1998 (inderFassungdersechstenAnderungssatzungvom16.August2010)vonHerrnProf.Dr.AchimHartschuhbetreut.Ehrenwor¨ tlicheVersicherungDieseDissertationwurdeselbststand¨ ig,ohneunerlaubteHilfeerarbeitet.M¨ unchen,den29. Juli2011.......................(UnterschriftdesAutors)Dissertationeingereichtam: 29. Juli20111.Gutachter: Prof.Dr.AchimHartschuh2.Gutachter: Prof.Dr.AlexanderHog¨ eleM¨ undlichePruf¨ ungam: 27. Oktober2011iAbstractIn the course of this work the excited state dynamics of individual single-walled carbonnanotubes(SWCNTs) were studied by a combination of confocal PLspectroscopyand timecorrelated single photon counting (TCSPC) measurements. Nonradiative decay channelsdominate the excited state dynamics of SWCNTs leading to low photoluminescence (PL)quantum yields and PL decay times on the picosecond timescale. Knowledge about themicroscopic nature of these decay channels is crucial to improve the material properties.