Self-assembled zinc oxide hierarchical structures with enhanced antibacterial properties from stacked chain-like zinc oxalate compounds

[Display omitted] Single ZnO crystallites assembled into porous hierarchical structures have been prepared by topotactic thermal decomposition of in situ obtained zinc oxalate precursors, whose synthesis involves a redox reaction between 1,2-ethanediol and nitrate ion. For the first time it was demo...

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Bibliographic Details
Published in:Journal of colloid and interface science 2019-09, Vol.552, p.258-270
Main Authors: Patrinoiu, Greta, Dumitru, Raluca, Culita, Dana C., Munteanu, Cornel, Birjega, Ruxandra, Calderon-Moreno, José M., Cucos, Andrei, Pelinescu, Diana, Chifiriuc, Mariana C., Bleotu, Coralia, Carp, Oana
Format: Article
Language:English
Subjects:
Anti-Bacterial Agents - chemical synthesis
Anti-Bacterial Agents - chemistry
Anti-Bacterial Agents - pharmacology
Antibacterial activity
Biofilms - drug effects
Gram-Negative Bacteria - drug effects
Gram-Positive Bacteria - drug effects
Lanthanide doping
Microbial Sensitivity Tests
Molecular Structure
Oxalates - chemistry
Oxalates - pharmacology
Particle Size
Post-synthesis processing
Surface Properties
Zinc Compounds - chemistry
Zinc Compounds - pharmacology
Zinc oxalate
Zinc Oxide - chemical synthesis
Zinc Oxide - chemistry
Zinc Oxide - pharmacology
ZnO
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Summary:[Display omitted] Single ZnO crystallites assembled into porous hierarchical structures have been prepared by topotactic thermal decomposition of in situ obtained zinc oxalate precursors, whose synthesis involves a redox reaction between 1,2-ethanediol and nitrate ion. For the first time it was demonstrated that post-synthesis protocols of the precursors (e.g. ultrasound irradiation, hydrolytic decomposition) master the hydrogen bonds formed between oxalate chains, allowing that way the adjustment of materials properties (morphology, porosity and optical) and a rational introduction of different dopants (Eu3+/Er3+). The ZnO surface reactivity is confirmed by the significant biocidal activity of the obtained materials against Gram-positive and Gram-negative planktonic and biofilm-embedded cells, superior to those reported in the literature for other ZnO-based materials or antibiotics, associated also with a good biocompatibility.
ISSN:0021-9797
1095-7103
DOI:10.1016/j.jcis.2019.05.051