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https://hdl.handle.net/2440/118250
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Type: | Journal article |
Title: | Morphological changes of sintered polydopamine coatings |
Author: | Gibson, C.T. Ridings, C.R. Blok, A.J. Shearer, C.J. Andersson, G.G. Ellis, A.V. |
Citation: | Surface Topography: Metrology and Properties, 2019; 7(1):015016-1-015016-10 |
Publisher: | IOP Publishing |
Issue Date: | 2019 |
ISSN: | 2051-672X 2051-672X |
Statement of Responsibility: | 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. |
DOI: | 10.1088/2051-672X/ab06eb |
Grant ID: | http://purl.org/au-research/grants/arc/FT130100211 |
Published version: | http://dx.doi.org/10.1088/2051-672x/ab06eb |
Appears in Collections: | Aurora harvest 8 Mechanical Engineering publications |
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