Influence of PDA Coating on the Structural, Optical and Surface Properties of ZnO Nanostructures
| Autor: | Radosław Mrówczyński, Emerson Coy, Roman Viter, Igor Iatsunskyi, Andris Šutka, Sahin Altundal, Kārlis Grundšteins, Arunas Ramanavicius, Viktoriia Fedorenko, Daina Damberga |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
optical sensors
Materials science Photoluminescence Nanostructure Nanocomposite General Chemical Engineering engineering.material Article lcsh:Chemistry fundamental properties symbols.namesake Adsorption lcsh:QD1-999 Coating Chemical engineering engineering symbols General Materials Science Diffuse reflection ZnO–polydopamine nanocomposites Fourier transform infrared spectroscopy Raman spectroscopy |
| Zdroj: | Nanomaterials Volume 10 Issue 12 Nanomaterials, Vol 10, Iss 2438, p 2438 (2020) |
| ISSN: | 2079-4991 |
| Popis: | Polydopamine (PDA) is a new biocompatible material, which has prospects in biomedical and sensor applications. Due to functional groups, it can host wide range of biomolecules. ZnO nanostructures are well known templates for optical sensors and biosensors. The combination of ZnO and PDA results in a change of optical properties of ZnO&ndash PDA composites as a shift of photoluminescence (PL) peaks and PL quenching. However, to date, the effect of the PDA layer on fundamental properties of ZnO&ndash PDA nanostructures has not been studied. The presented paper reports on optical and surface properties of novel ZnO&ndash PDA nanocomposites. PDA layers were chemically synthesized on ZnO nanostructures from different solution concentrations of 0.3, 0.4, 0.5 and 0.7 mg/mL. Structure, electronic and optical properties were studied by SEM, Raman, FTIR, diffuse reflectance and photoluminescence methods. The Z-potential of the samples was evaluated in neutral pH (pH = 7.2). The response of the samples towards poly-l-lysine adsorption, as a model molecule, was studied by PL spectroscopy to evaluate the correlation between optical and surface properties. The role of the PDA concentration on fundamental properties was discussed. |
| Databáze: | OpenAIRE |
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