Please use this identifier to cite or link to this item:
|Scopus||Web of Science®||Altmetric|
|Title:||Morphological changes of sintered polydopamine coatings|
|Citation:||Surface Topography: Metrology and Properties, 2019; 7(1):015016-1-015016-10|
|Christopher T Gibson, Christiaan R Ridings, Andrew J Blok, Cameron J Shearer, Gunther G Andersson and Amanda V Ellis|
|Abstract:||Polydopamine (PDA), produced from the self-polymerization of dopamine under alkaline conditions, is well known for its natural adhesive properties on a broad variety of surfaces. However, there is still ongoing controversy as to its growth, coverage and morphology characteristics. Here, we investigate the growth of PDA on a silicon substrate over various time periods (0–24 h) using a gentle rocking method. The samples were then post-heated at 150 °C under vacuum. Both the as-prepared and post-treated samples were examined with a combination of x-ray photoelectron, UV photoelectron, and neutral impact collision ion scattering spectroscopies, as well as atomic force microscopy. Results indicated that the PDA layer growth plateaus after 5 h, proceeding via island-growth, with incomplete coverage after 24 h. Heating PDA substrates resulted in sintering of the PDA islands to form a more homogenous surface coverage, indicating this is critical for the formation of smooth and homogenous coatings.|
|Keywords:||Neutral impact collision ion scattering spectroscopy; atomic force microscopy; UV photoelectron spectroscopy; x-ray photoelectron spectroscop; polydopamine|
|Rights:||© 2019 IOP Publishing Ltd.|
|Appears in Collections:||Mechanical Engineering publications|
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.