High-Resolution Adhesion Mapping of the Odd–Even Effect on a Layer-by-Layer Coated Biomaterial by Atomic-Force-Microscopy
| Autor: | Silke Schön, Kirstin Casdorff, Benjamin Michen, Ingo Burgert, Hervé Bellanger, Tobias Keplinger |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Silicon Layer by layer chemistry.chemical_element Biomaterial Nanotechnology 02 engineering and technology Substrate (electronics) Adhesion 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Polyelectrolyte 0104 chemical sciences Micrometre chemistry Chemical engineering General Materials Science Nanometre 0210 nano-technology |
| Zdroj: | ACS Applied Materials & Interfaces. 9:13793-13800 |
| ISSN: | 1944-8252 1944-8244 |
| DOI: | 10.1021/acsami.7b02564 |
| Popis: | The adhesion behavior of polyelectrolyte multilayers consisting of poly(diallyldimethylammonium chloride), PDDA, and poly(styrenesulfonate), PSS, toward a silicon AFM tip was studied during their build-up on wood, a chemically heterogeneous, micrometer rough biomaterial and compared with a nanometer rough substrate, namely quartz. The atomic force microscopy-based force mapping approach generated high-resolution topography-, and adhesion maps within the first bilayers, which point toward a homogeneous layer-by-layer build-up on the biomaterial surface, and therefore indicate an even charge distribution. By analyzing the force-distance curves in every pixel of the mapping, new insights into the specific interactions of the polyelectrolyte multilayers at the surface were achieved. The characteristic odd-even effect of polyelectrolyte multilayers cannot only be determined on quartz, but also on the biomaterial wood, however, only after an offset of two bilayers. This is potentially due to the specific roughness and charge of wood in comparison to commonly used quartz. |
| Databáze: | OpenAIRE |
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