https://ogma.newcastle.edu.au/vital/access/ /manager/Index en-au 5 Redox Active Cerium Oxide Nanoparticles: Current Status and Burning Issues https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:43950 Wed 05 Oct 2022 13:05:30 AEDT ]]> Assessment of the impact of abiotic factors on the stability of engineered nanomaterials in fish embryo media https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:49031 Wed 03 May 2023 13:41:01 AEST ]]> Polymer-coated cerium oxide nanoparticles as oxidoreductase-like catalysts https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:46495 Thu 24 Nov 2022 12:01:03 AEDT ]]> Fluoride-assisted detection of glutathione by surface Ce³⁺/Ce⁴⁺ engineered nanoceria https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:52445 4+/Ce³⁺ compositions. Using DFT calculations combined with Bader charge analysis, it is demonstrated that stoichiometric ceria registers a higher oxidase mimetic activity than oxygen-deficient ceria with a low Ce⁴⁺/Ce³⁺ ratio due to a higher charge transfer from a substrate, 3,3',5,5' tetramethylbenzidine (TMB), to the ceria surface. We also show that the fluoride ions can significantly increase the charge transfer from the TMB surface to ceria irrespective of the surface Ce⁴⁺/Ce³⁺ ratio. Using this knowledge, we first compare the fluoride sensing properties of nanoceria with high Ce⁴⁺ and mixed Ce⁴⁺/Ce³⁺ oxidation states and further demonstrate that the linear detection range of fluoride ions can be extended to 1-10 ppm for nanoceria with mixed oxidation states. Then, we also demonstrate an assay for fluoride assisted detection of glutathione, an antioxidant with elevated levels during cancer, using nanoceria with a high surface Ce⁴⁺/Ce³⁺ ratio. The addition of fluoride ions in this assay allows the detection of glutathione in the linear range of 2.5-50 ppm with a limit of detection (LOD) of 3.8 ppm. These studies not only underpin the role of the surface Ce⁴⁺/Ce³⁺ ratio in tuning the fluoride assisted boost in the oxidase mimetic activity of nanoceria but also its strategic application in designing better colourimetric assays.]]> Thu 12 Oct 2023 15:28:04 AEDT ]]> Nanomaterials-based sensors for the detection of COVID-19: A review https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:48219 Sat 11 Mar 2023 12:36:55 AEDT ]]> Self-assembled fullerene nanostructures: synthesis and applications https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:39011 Mon 29 Jan 2024 18:37:32 AEDT ]]> Nanostructured carbon nitrides for CO2 capture and conversion https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:46189 Mon 14 Nov 2022 10:48:06 AEDT ]]> Montmorillonite clay and humic acid modulate the behavior of copper oxide nanoparticles in aqueous environment and induces developmental defects in zebrafish embryo https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:46155 Fri 11 Nov 2022 19:06:14 AEDT ]]>