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Tangerine mediated synthesis of zirconia as potential protective dental coatings
- Source :
- Materials Science and Engineering: C. 120:111653
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
Abstract
- Demand of bioactive materials that may create a bacteria-free environment while healing and regenerating the defect area is increasing day by day. Zirconia is a very interesting material because of its biocompatibility and high fracture toughness. In this research work, zirconia nanoparticles (NPs) have been synthesized using sol-gel method. Molarity of sols is varied in the range of 25 to 125 mM. The effect of acidic and basic nature of sols is studied by maintaining acidic (2) and basic (9) pH. As-synthesized NPs are made soluble in deionized (DI) water using tangerine drops. Dissolved NPs are spin coated onto glass substrate prior to characterization. Pure tetragonal phase, observed under all conditions using basic medium (pH 9), is accompanied by smaller crystallite size and unit cell volume. Presence of stabilized zirconia phase leads to higher value of density and higher mechanical strength. Nanodendrites with distinct features are observed for the sample prepared with high molarity using basic medium. Whereas, soft agglomerated nanodendrites are observed using acidic medium. Optical properties show transmission of 60–80% in the visible and infrared regions for acidic based samples and ~84% for basic samples. Direct energy band gap is varied from 4.96 eV to 5.1 eV in acidic (pH 2) and 4.91 eV to 4.97 eV in basic (pH 9) media. FTIR spectra show the formation of fundamental tetragonal band at 490 cm−1 for basic samples. Antibacterial response of zirconia is tested against E. coli, Streptococcus and Bacillus bacteria. Human teeth, bare and zirconia coated, are tested for their possible weight loss after dipping in various beverages. Zirconia coated tooth shows negligible degradation in hardness and weight after 24 hr dipping period. Thus, coatings prepared using water soluble zirconia (WSZ) nanoparticles, without the use of toxic solvents/reagents, are promising material to be used as protective coatings in biomedical applications.
- Subjects :
- Molar concentration
Materials science
Biocompatibility
Surface Properties
Nanoparticle
Bioengineering
02 engineering and technology
engineering.material
010402 general chemistry
01 natural sciences
Biomaterials
Coating
Hardness
Phase (matter)
Materials Testing
Escherichia coli
Humans
Cubic zirconia
Substrate (chemistry)
021001 nanoscience & nanotechnology
0104 chemical sciences
Chemical engineering
Mechanics of Materials
engineering
Nanoparticles
Zirconium
Crystallite
0210 nano-technology
Subjects
Details
- ISSN :
- 09284931
- Volume :
- 120
- Database :
- OpenAIRE
- Journal :
- Materials Science and Engineering: C
- Accession number :
- edsair.doi.dedup.....d6fb7cacd24c1f63c7c83df436051891