https://ogma.newcastle.edu.au/vital/access/ /manager/Index en-au 5 https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:37134 3+ doping in Co₃O₄ spinel remains poorly understood, mainly because the surface state of a catalyst is difficult to characterize. Herein, a bifunctional oxygen electrode composed of spinel Co₂FeO₄/(Co_0.72Fe_0.28)_Td(Co_1.28Fe_0.72)_OctO₄ nanoparticles grown on N‐doped carbon nanotubes (NCNTs) is designed, which exhibits superior performance to state‐of‐the‐art noble metal catalysts. Theoretical calculations and magnetic measurements reveal that the introduction of Fe³⁺ ions into the Co₃O₄ network causes delocalization of the Co 3d electrons and spin‐state transition. Fe³⁺ ions can effectively activate adjacent Co³⁺ ions under the action of both spin and charge effect, resulting in the enhanced intrinsic oxygen catalytic activity of the hybrid spinel Co₂FeO₄. This work provides not only a promising bifunctional electrode for zinc–air batteries, but also offers a new insight to understand the Co‐Fe spinel oxides for oxygen electrocatalysis.]]> Wed 19 Aug 2020 15:05:43 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:37133 Wed 19 Aug 2020 14:09:46 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:37131 Wed 19 Aug 2020 13:34:43 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:37126 Wed 19 Aug 2020 12:10:45 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:35848 streptomyces species. Despite the significant increase in the antibacterial resistant pathogens, aminoglycosides remain an important class of antimicrobial drugs due to their unique chemical structure which offers a broad spectrum of activity. The modification of antibiotics and their subsequent use in supramolecular chemistry is rarely reported. Given the importance of aminoglycosides, here we give a brief overview on the modification of 4,5- and 4,6-disubstituted deoxystreptamine classes of aminoglycosides through supramolecular chemistry and their potential for real world applications. We also make the case that the work in this area is gaining momentum, and there are significant opportunities to meet the challenges of modern antibiotics through the modification of aminoglycosides by harnessing the advantages of supramolecular chemistry.]]> Wed 11 Dec 2019 12:45:22 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:34458 Tue 03 Sep 2019 18:22:25 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:36692 Thu 13 Jan 2022 10:31:57 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:37125 Thu 03 Feb 2022 12:20:01 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:36355 Thu 02 Apr 2020 10:39:32 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:28254 −2. The aluminum penetration into the P3HT:PCBM film was found to be consistent with the depth of this oxide layer, suggesting that aluminum penetration into the organic film is not the primary reason for performance limitations in sputtered devices. Introduction of thermally evaporated aluminum buffer layers prior to deposition of sputtered aluminum cathodes demonstrated that the performance of devices after annealing matched those of reference devices prepared with no sputtering for a buffer layer thickness of only 20 nm. Further analysis of the device J--V curves revealed an S-shaped kink prior to annealing, indicating that the major reason for the poor performance in sputtered devices was the introduction of a charge extraction barrier at the cathode, which was subsequently removed upon annealing. Rigorous removal of oxygen from the sputtering chamber prior to aluminum deposition onto the P3HT:PCBM active layer was subsequently observed to produce a device with an efficiency close to that of the thermally evaporated reference device without the requirement for evaporated buffer layers. The results presented here highlight a pathway towards an alternative R2R cathode fabrication technique that allows the highly efficient aluminum cathodes employed in small-scale devices to be transferred onto large-scale, flexible, and low-cost R2R printed organic electronic devices.]]> Sat 24 Mar 2018 07:28:36 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:36506 Mon 25 May 2020 12:08:47 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:35269 Mon 08 Jul 2019 11:02:20 AEST ]]>