Computational Studies on Functionalized ZnO Surfaces and Nanostructures
Veröffentlichungsdatum
2011-04-11
Autoren
Betreuer
Gutachter
Zusammenfassung
In this work, we have used computer simulations to investigate the effect of organic functionalization on ZnO surfaces and nanostructures. Density Functional Theory has been employed to study the interactions of ZnO surfaces with different organic groups, identifying stabilization mechanisms involved in each case and the most promising anchoring groups for ZnO functionalization. Additionally, a semi-empirical model for ZnO large scale simulations has been developed and validated by comparison against DFT calculations. The was successful in simulating Zn-containing bulk solids and molecular complexes, ZnO surfaces and nanostructures, and the adsorption of organic acids on (1010)-ZnO surfaces. We have also employed this model to characterize native defects in ZnO nanowires. Finally, we have demonstrated that the interaction of surface oxygen vacancies with organic acids may explain the suppression of photoluminescence anomalies observed for polymer coated ZnO nanowires.
Schlagwörter
ZnO
;
Functionalization
;
Nanostructures
;
Surface Chemistry
;
DFT
;
SCC-DFTB
Institution
Fachbereich
Dokumenttyp
Dissertation
Zweitveröffentlichung
Nein
Sprache
Englisch
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00101981-1.pdf
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8.87 MB
Format
Adobe PDF
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