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Enhanced deposition of Fe(III)-tannic acid complex nanofilm by Fe(III)-embedded dextran nanocoating

Title
Enhanced deposition of Fe(III)-tannic acid complex nanofilm by Fe(III)-embedded dextran nanocoating
Authors
Lee H.Han Y.Park J.H.
Ewha Authors
박지훈
SCOPUS Author ID
박지훈scopus
Issue Date
2022
Journal Title
Applied Surface Science
ISSN
0169-4332JCR Link
Citation
Applied Surface Science vol. 573
Keywords
DextranMetal-polyphenol complexMultilayer depositionNanocoatingTannic acid
Publisher
Elsevier B.V.
Indexed
SCIE; SCOPUS scopus
Document Type
Article
Abstract
Nanofilm deposition with Fe(III)-tannic acid (TA) complex serves as a surface nanoengineering technique for a wide variety of substrate materials. However, it has been still elusive to tune the fundamental nanofilm properties, such as thickness and roughness, for a single Fe(III)-TA layer. Here we demonstrate Fe(III)-embedded dextran nanocoating serving as a boosting layer for enhanced deposition of Fe(III)-TA complex nanofilm with higher roughness. The formation of Fe(III)-embedded dextran layer with 0.37 mM FeCl3·6H2O shows maximum three times deposition enhancement of Fe(III)-TA layer in film thickness (ca. 9 nm), compared with the conventional deposition. pH stability tests show that the multilayer structures formed with Fe(III)-TA layers and Fe(III)-embedded dextran layers are highly stable at pH 7.4 but gradually and rapidly degrade at pH 10 and pH 2, respectively. Further surface characterizations disclose that solution pH, correlated with the concentration of Fe(III) source (FeCl3·6H2O), is the major factor governing the deposition enhancement effect: more than 1.85 mM FeCl3·6H2O makes significantly acidic chemical environments hampering the further deposition of Fe(III)-TA nanofilms. The experimental findings herein provide clues for deeper understanding of metal-polyphenol complex nanofilm deposition as well as contribute to the future development of biocompatible nanocoating utilizing promising combinations of polysaccharides and polyphenols. © 2021
DOI
10.1016/j.apsusc.2021.151598
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사범대학 > 과학교육과 > Journal papers
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