Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 29 for “"superionic"”.
-
Phase transitions in superionic PbSnF₄
PbSnF$\sb4$ is the highest performance fluoride ion conductor known to date. We have studied the phase transitions it undergoes under three different conditions: (i) versus the amount of hydrofluoric acid used for the preparation by the aqueous route, (ii) upon application of mechanical energy, and …
-
Solid-state superionic conductors for advanced nanoscale fabrication
… developed a process known as solid-state superionic stamping (S4) to selectively etch silver and copper films by generating localized electrochemical metal etching using the patterned solid ionic conductor Ag2S as a stamp, achieving sub-50nm lateral resolution. In this work, AgIAgPO3 is …
-
Solid state superionic stamping design for large area patterning
Solid state superionic stamping (S4) is a non-photolithographic process for etching features into thin metal films which has shown the capability of reproducing features below 100 nm in recent years. The technique has significant potential because in addition to its high resolution capability it is …
-
Further analysis of solid state superionic stamping for nanoscale fabrication
… nano-imprint process called solid state superionic stamping (S4) using AgIAgPO& glass as the solid electrolyte to pattern and transfer nanostructures on the silver. This technology is economically low-cost, high efficiency, and environmentally friendly. The whole process will not generate …
-
Electrochemical and structural properties of superionic conductors in aqueous electrolyte
… limited by high resistance from the membrane, a superionic conductor. This thesis investigates the electrochemical and structural properties of these superionic conductors (NaSICON and LiSICON) in aqueous electrolyte of varying pH to determine its suitability for this new battery chemistry. The …
-
Extensions to solid-state superionic stamping with applications to generating structural color
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-10-19 without embargo terms
-
Novel phase and phase transition behavior of a superionic conductor observed on the nanoscale
… transition by which copper selenide becomes a superionic phase and ii) the microscopic mechanisms of ionic motion in this material. My studies were performed on nanostructures of copper selenide. Chapter 1 introduces the concept of a superionic conductor and describes one particular example, …
-
Solid-state superionic stamping: Patterning 3D metallic micro- and nanostructures for surface enhanced Raman sensing
… scalable manufacturing process using superionic conductors, known as Solid-State Superionic Stamping (S4), for the selective etching of silver and copper. S4 is a single-step, highly scalable, all solid-state process that can be performed under ambient conditions, offering high …
-
Silver Diffusion and Isotope Effect in Silver-Rubidium-Iodide
… iodide (RbAg(,4)I(,5)) has been measured in both superionic phases using radiotracer Ag-110m and serial sectioning with a low temperature sectioning apparatus. The activation energies for diffusion in alpha-RbAg(,4)I(,5) and beta-RbAg(,4)I(,5), respectively, are .11 (+OR-) .01 eV and .20 (+OR-) …
-
Exploring condensed phases in engineered semiconducting nanocrystals
… transition from the non-superionic to superionic phase transition also appears to be present in the final lithium selenide (Li2Se) NCs formed from this doping reaction. In Chapter 4, I explain on the basis of optical spectra measurements and density functional theory (DFT) …
-
Computational electronic structure studies of novel condensed matter phases
… that we conducted on Cu2Se, this time into its superionic properties. The nucleation, kinetics, and correlation of lattice strain to the order-disorder superionic phase transition were explored through a combination of transmission electron microscopy and DFT. The correlation between lattice …
-
Exploring new materials for caloric cooling
… performance. This work reports on a selection of superionic conductors and metal-organic frameworks that were chosen based on their promising thermodynamic properties for barocaloric studies. Furthermore, novel ways of driving caloric effects are explored by exploiting latent heat from first-order …
-
Stop-flow lithography and its application to graphical encoding
… covered in this thesis is called solid-state superionic stamping (S4). It is a direct patterning technique for metals, featuring one-step, large fabrication area, low cost and working in ambient conditions. This technique is complementary to SFL in the sense that it enlarges material selection …
-
Ionic mobility and superplasticity in ceramics
Superplasticity and superionic conductivity (SIC), both thermally activated processes, have been independently observed in certain materials with a high diffusion coefficient in high temperature ranges. Intuitively, this observation leads one to the idea that both types of behavior may be …
-
Effect of pressure on ionic conductivity in rubidium silver iodide and silver iodide
… the theory of Rice et al. of transitions to the superionic phase.
-
Scalable direct electrochemical nanopatterning of silver films
… and chemical sensing applications. Solid-State Superionic Stamping (S4) is an electrochemical nano-imprinting process that is capable of directly patterning silver nanostructures. In this thesis, we demonstrate a simple method to scale up S4 patterning of silver using a plate-to-roll (P2R) …
-
Physical and electrical properties of Li1+xTi2-xAlx(PO4)3 and Li1+2xTa1-xAlx+1(PO4)3 electrolytes
Sodium superionic conducting materials (NASICON) are promising solid electrolytes for Li-ion rechargeable batteries. In this study, two compositions; lithium titanium aluminium phosphate (LTAP), Li1+xTi2-xAlx(PO4)3 (x = 0.0, 0.2, 0.6, 1.0) and lithium tantalum aluminium phosphate (LTaAP), …
-
Physical and electrical properties of Li1+xTi2-xAlx(PO4)3 and Li1+2xTa1-xAlx+1(PO4)3 electrolytes
Sodium superionic conducting materials (NASICON) are promising solid electrolytes for Li-ion rechargeable batteries. In this study, two compositions; lithium titanium aluminium phosphate (LTAP), Li1+xTi2-xAlx(PO4)3 (x = 0.0, 0.2, 0.6, 1.0) and lithium tantalum aluminium phosphate (LTaAP), …
-
NMR studies of conduction mechanisms in electrolyte materials for fuel cells
… fluoride ion dynamics in the fluoride conducting superionic material, PbSnF4 and in Chapter 4 1H NMR relaxometry is used to examine proton motions along hydrogen bonds in the novel superprotonic material, Cs6(HSO4)3(H2PO4)4. The results of the NMR analysis show good agreement with bulk physical …
-
Nonlithographic manufacturing of 1-D silicon nanostructures with tunable surface morphology via thermal dewetting and metal-assisted chemical etching
… silver patterns are created by Solid-State Superionic Stamping (S4), a non-lithographic and ambient method for patterning silver thin-films, and combined with the lift-off and MacEtch processes to produce such complex nanostructures. Sub-160 nm nanostructures were produced by this approach …
Page 1 of 2