https://ogma.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:29769 2S and after 21 days nearly full corrosion has occurred, but some with minor Ag inclusions remaining. In contrast, a bulk Ag sheet, studied in cross section, showed an adherent corrosion layer of only around 20-50 nm in thickness after over a decade of being exposed to ambient air. The results have implications for antibacterial properties and ecotoxicology of AgNP during corrosion as the dissolution and reformation of Ag particles during corrosion will likely be accompanied by the release of Ag+ ions.]]> Wed 11 Apr 2018 12:52:26 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:32917 x WO₃) are vividly coloured metallic materials where the optical behaviour can be attributed to the bulk plasma frequency occurring in the visible part of the spectrum. A combination of density functional theory (DFT) calculations and experimental electron energy-loss spectroscopy (EELS) was used to assess their bulk and surface plasmon responses. It was observed that Na_x WO₃ can sustain strong localised surface plasmon resonances (LSPR) with an energy that can be tuned by changing the Na content. They have a stronger plasmonic response when compared to Au and do not suffer from the atmospheric corrosion of Ag, giving them good potential for plasmonic applications]]> Wed 02 Jun 2021 20:44:08 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:47828 Wed 01 Feb 2023 13:08:00 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:36678 xN, VO₂, Al, Cu, Al-doped ZnO, and Cu-Al alloys. The relative merits of these choices and the many pitfalls and subtle problems that arise are discussed, and a frank perspective on the field is provided.]]> Tue 23 Jun 2020 14:21:41 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:26812 Sat 24 Mar 2018 07:36:28 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:30437 x WO₃, where 0  ≤  x  ≤  1, and M is a dopant ion, most commonly an alkali metal. In this work, the sodium tungsten bronzes (Na_x WO₃) are investigated as materials for plasmonic applications. The bronzes were fabricated with a solid state reaction, the dielectric function calculated using density functional theory (DFT) and the nanoparticle responses calculated with the boundary element method (BEM). The results were compared to Au and Ag, the materials most widely used in plasmonic applications. It was shown that for x  >  0.5, the solid state fabrication method produces cube-shaped particles of diameter  ≥1 µm, whose bulk optical properties are well described by a free-electron model and a rigid band structure. The addition of Na into the lattice increases the free electron density, increasing the bulk plasma frequency. Nanoparticle plasmon resonances are found to be highly tunable, and generally at a lower frequency than Au or Ag, and so sodium tungsten bronzes are predicted to be well suited to biomedical or chemical sensing applications.]]> Mon 23 Sep 2019 12:42:27 AEST ]]>