Influence of Defects on the Reactivity of Organic Surfaces
| Autor: | Jixin Chen, Jacob W. Ciszek, Gregory J. Deye, Juvinch R. Vicente |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Absorption spectroscopy 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Pentacene chemistry.chemical_compound General Energy chemistry Chemical physics Phase (matter) Monolayer Grain boundary Reactivity (chemistry) Physical and Theoretical Chemistry Dislocation 0210 nano-technology Acene |
| Zdroj: | The Journal of Physical Chemistry C. 122:15582-15587 |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/acs.jpcc.8b04635 |
| Popis: | Molecular orientation within organic solids limits the range of applicable surface reactions, with reactive functionalities often recessed and inaccessible to adsorbates. To induce reactivity in heretofore inert orientations of acenes, a defect-mediated mechanism is utilized to functionalize thin-film phase pentacene. This mechanism was demonstrated via correlation of reaction data to defect density, determined via polarization modulation infrared reflection absorption spectroscopy (PM-IRRAS) and atomic force microscopy (AFM). By controllably varying the amount of grain boundaries in the acene films, the reaction can be varied from near zero to coverage exceeding a monolayer. The extensive coverage suggests that the reaction propagates from the defects throughout the grains, a prediction borne out via direct observation of reaction progression along the surface from a single dislocation (via scanning electron microscopy). The results support a mechanism whereby the reaction is initialized at the defect si... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|