The Journal of Physical Chemistry B · 2003 · 93 citations · 8 references
Natural SciencesChemistryMaterials ScienceMaterials ChemistrySurface ScienceThin FilmsNanomaterial CharacterizationNanostructured SurfacesSemiconductor NanomaterialsSemiconductor SurfacesSurface PhysicsX-ray Photoelectron SpectroscopyNanomaterial Surface ChemistrySecondary Ion Mass SpectrometrySurface Chemical State AnalysisSurface Oxidation EffectsSurface Oxidation MechanismsSurface Oxidation StatesTime-of-flight Mass SpectrometryTime-of-flight Secondary Ion Mass Spectrometry
We report the changes in surface state of tri- n -octylphosphine oxide (TOPO) capped CdSe nacocrystals by X-ray photoelectron spectroscopy (XPS) and time-of-flight secondary ion mass spectrometry (ToF-SIMS). In the photobrightening state, where photoluminescence (PL) intensity increased during the illumination, surface ligand rearrangement such as the TOPO−Se compelx and TOPO dimers are formed, which might be deeply correlated with the PL enhancement. It was also observed that surface oxidation and decomposition of TOPO, which is followed by the desorption, occurred in photodarkening state.
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B. O. Dabbousi, J. Rodríguez‐Viejo, Frederic V. Mikulec et al. · The Journal of Physical Chemistry B · 1997 · 4.2K citations
Natural Sciences, Materials Engineering, Materials Science +17
Fluorescence intermittency in single cadmium selenide nanocrystals
M. Nirmal, B. O. Dabbousi, Moungi G. Bawendi et al. · Nature · 1996 · 2K citations