https://nova.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:49792 Wed 31 May 2023 15:03:39 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:46231 Wed 08 Mar 2023 13:50:20 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:50142 20 nm). The inability to precisely control nanoparticle crystallinity, size, and shape has significant implications on observed properties and therefore applications. A series of iron oxide particles have been synthesised and the impact of size as they agglomerate in aqueous media undergoing flow through a capillary tube has been studied. Reaction conditions for the production of large (side length > 40 nm) cubic magnetite (Fe3O4) have been optimised to produce particles with different diameters up to 150 nm. We have focussed on reproducibility in synthesis rather than dispersity of the size distribution. A simple oxidative cleavage of the as-synthesised particles surfactant coating transforms the hydrophobic oleic acid coated Fe3O4 to a hydrophilic system based on azelaic acid. The hydrophilic coating can be further functionalised, in this case we have used a simple biocompatible polyethylene glycol (PEG) coating. The ability of particles to either chain, flow, and fully/or partially aggregate in aqueous media has been tested in a simple in-house system made from commercial components. Fe3O4 nanoparticles (60-85 nm) with a simple PEG coating were found to freely flow at a 2 mm distance from a magnet over 3 min at a rate of 1 mL min-1. Larger particles with side lengths of ∼150 nm, or those without a PEG coating were not able to fully block the tube. Simple calculations have been performed to support these observations of magnetic agglomeration.]]> Wed 05 Jul 2023 13:08:14 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:49752 Tue 30 May 2023 17:14:41 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:54350 Tue 20 Feb 2024 16:21:48 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:49892 Tue 13 Jun 2023 14:39:35 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:49341 Thu 11 May 2023 15:35:10 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:52203 Thu 05 Oct 2023 10:08:39 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:46287 cavity spintronics, investigating a quasiparticle that emerges from the strong coupling between standing electromagnetic waves confined in a microwave cavity resonator and the quanta of spin waves, magnons. This phenomenon is now expected to be employed in a variety of devices for applications ranging from quantum communication to dark matter detection. To be successful, most of these applications require a vast control of the coupling strength, resulting in intensive efforts to understanding coupling by a variety of different approaches. Here, the electromagnetic properties of both resonator and magnetic samples are investigated to provide a comprehensive understanding of the coupling between these two systems. Because the coupling is a consequence of the excitation vector fields, which directly interact with magnetization dynamics, a highly accurate electromagnetic perturbation theory is employed that predicts the resonant hybrid mode frequencies for any field configuration within the cavity resonator. The coupling is shown to be strongly dependent not only on the excitation vector fields and sample’s magnetic properties but also on the sample’s shape. These findings are illustrated by applying the theoretical framework to two distinct experiments: a magnetic sphere placed in a three-dimensional resonator and a rectangular, magnetic prism placed in a two-dimensional resonator. The theory provides comprehensive understanding of the overall behavior of strongly coupled systems and it can be easily modified for a variety of other systems.]]> Mon 14 Nov 2022 16:16:50 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:52788 Fri 27 Oct 2023 10:22:28 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:51911 Fri 22 Sep 2023 10:39:44 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:53612 Fri 08 Dec 2023 16:07:09 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:52948 Fri 03 Nov 2023 11:05:18 AEDT ]]>