https://nova.newcastle.edu.au/vital/access/ /manager/Index en-au 5 https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:14672 Wed 11 Apr 2018 16:24:54 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:21303 , ₄]TFSI with Au(111) using cyclic voltammetry and atomic force microscopy (AFM). Raman spectroscopy was used to understand the Li⁺ ion coordination with the TFSI– ion and showed that with increase in LiTFSI concentration in[Py₁_, ₄]TFSI, the Li+ ion solvation structure significantly changes. Correspondingly, the force–distance profile in AFM revealed that at lower concentrations of LiTFSI (0.1 M) a multilayered structure is obtained. On increasing the concentration of LiTFSI (0.5 and 1 M), a significant decrease in the number of interfacial layers was observed. With change in the potential, the interfacial layers were found to vary with an increase in the force required to rupture the layers. The present study clearly shows that Li⁺ ions vary the ionic liquid/Au(111) interface and could provide insight into the interfacial processes in ionic liquid based lithium batteries.]]> Wed 11 Apr 2018 15:26:43 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:31333 1,4]TFSA). AFM measurements reveal that the imidazolium cation adsorbs at the H-Si(111)/[EMIm]TFSA interface leading to an ordered clustered facet structure of ∼3.8 nm in size. In comparison, the Si(111)/[Py_1,4]TFSA interface appeared the same as the native surface in argon. For both pure ILs, repulsive forces were measured as the tip approached the surface. On addition of LiTFSA attractive forces were measured, revealing marked changes in the interfacial structure.]]> Wed 11 Apr 2018 09:55:10 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:10811 Sat 24 Mar 2018 08:13:23 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:17433 Sat 24 Mar 2018 08:01:39 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:20591 Sat 24 Mar 2018 07:55:31 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:22100 5 in two hydrophobic ionic liquids (1-butyl-1-methylpyrrolidinium tris(pentafluoroethyl) trifluorophosphate ([Py_1,4]FAP) and 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl) amide ([Py_1,4]TFSA) is probed using three in situ techniques: scanning tunneling microscopy (STM), atomic force microscopy (AFM), and electrochemical quartz crystal microbalance (EQCM). These techniques reveal that under similar conditions TaF₅is more easily reduced in the liquids with [TFSA]⁻ than [FAP]⁻anions. Increasing the temperature reduced the viscosity and density of the ionic liquids which facilitates TaF₅ electroreduction, in particular, in [Py_1,4]TFSA. A herringbone reconstruction of the Au electrode was observed by STM for both ionic liquids with and without TaF₅. Ta deposition was proved by STM and EQCM in [Py_1,4]TFSA. Cracked layers, with ionic liquid trapped inside, were obtained by direct plating from the [TFSA]− ionic liquid. No Ta containing deposits could be obtained in the liquid with the [FAP]− anion.]]> Mon 23 Sep 2019 11:13:11 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:24002 in situ techniques: scanning tunneling microscopy (STM), atomic force microscopy (AFM), and electrochemical quartz crystal microbalance (EQCM). These techniques reveal that under similar conditions TaF₅ is more easily reduced in the liquids with [TFSA]⁻ than [FAP]-anions. Increasing the temperature reduced the viscosity and density of the ionic liquids which facilitates TaF₅ electroreduction, in particular, in [Py₁,₄]TFSA. A herringbone reconstruction of the Au electrode was observed by STM for both ionic liquids with and without TaF₅. Ta deposition was proved by STM and EQCM in [Py₁,₄]TFSA. Cracked layers, with ionic liquid trapped inside, were obtained by direct plating from the [TFSA]⁻ ionic liquid. No Ta containing deposits could be obtained in the liquid with the [FAP]⁻ anion.]]> Mon 23 Sep 2019 10:21:47 AEST ]]>