Neil A. Fox
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View article: Poligromorph Materials: Shape Morphing Functional Polyvinyl Alcohol/Maleic Anhydride Ethylene‐Propylene/Carbon Composites in Aqueous and Hydrocarbon‐Based Media
Poligromorph Materials: Shape Morphing Functional Polyvinyl Alcohol/Maleic Anhydride Ethylene‐Propylene/Carbon Composites in Aqueous and Hydrocarbon‐Based Media Open
Hygromorphic materials and composites adjust their shape and curvature in response to changes in relative humidity, similar to the pinecone scales existing in nature. This work introduces a new class of poligromorphic materials‐composites …
View article: Utilizing Solvent Repulsion between Dimethylformamide and Isopropanol to Manipulate Sn Distribution for Bifacial Cu<sub>2</sub>ZnSn(S,Se)<sub>4</sub> Solar Cells
Utilizing Solvent Repulsion between Dimethylformamide and Isopropanol to Manipulate Sn Distribution for Bifacial Cu<sub>2</sub>ZnSn(S,Se)<sub>4</sub> Solar Cells Open
Rationalizing the role of chemical interactions in the precursor solutions on the structure, morphology, and performance of thin-film Cu2ZnSn(S,Se)4 (CZTSSe) is key for the development of bifacial and other photovoltaic (PV) device archite…
View article: Enhanced Electron Emission Performance and Air‐Surface Stability in ScO‐Terminated Diamond for Thermionic Energy Converters
Enhanced Electron Emission Performance and Air‐Surface Stability in ScO‐Terminated Diamond for Thermionic Energy Converters Open
Diamond with negative electron affinity (NEA) and low work function surfaces are suggested as a suitable material for electron‐generation applications in vacuum, in particular, as the emitter electrode in thermionic energy converters. Such…
View article: Versatile Method for Preparing Two-Dimensional Metal Dihalides
Versatile Method for Preparing Two-Dimensional Metal Dihalides Open
Ever since the ground-breaking isolation of graphene, numerous two-dimensional (2D) materials have emerged with 2D metal dihalides gaining significant attention due to their intriguing electrical and magnetic properties. In this study, we …
View article: Experimental studies of electron affinity and work function from titanium on oxidised diamond (100) surfaces
Experimental studies of electron affinity and work function from titanium on oxidised diamond (100) surfaces Open
Sub-monolayers of titanium were deposited onto oxidised (100) single-crystal diamond surfaces and annealed in vacuo at temperatures up to 1000 °C to find a temperature-stable termination procedure that produces a surface with Negative Elec…
View article: Mapping the Energetics of Defect States in Cu<sub>2</sub>ZnSnS<sub>4</sub> films and the Impact of Sb Doping
Mapping the Energetics of Defect States in Cu<sub>2</sub>ZnSnS<sub>4</sub> films and the Impact of Sb Doping Open
The sub-bandgap levels associated with defect states in Cu2ZnSnS4 (CZTS) thin films are investigated by correlating the temperature dependence of the absorber photoluminescence (PL) with the device admittance spectroscopy. CZTS thin films …
View article: <i>Ex situ</i> Ge-doping of CZTS nanocrystals and CZTSSe solar absorber films
<i>Ex situ</i> Ge-doping of CZTS nanocrystals and CZTSSe solar absorber films Open
Ge doping is employed to aid the recrystallisation of Cu 2 ZnSnS 4 nanocrystals. Opto-electrical properties are presented to describe Ge incorporation with a focus on the electronic interface between the Ge:Cu 2 ZnSn(S, Se), absorber and C…
View article: Experimental Studies of Electron Affinity and Work Function from Aluminium on Oxidized Diamond (100) and (111) Surfaces
Experimental Studies of Electron Affinity and Work Function from Aluminium on Oxidized Diamond (100) and (111) Surfaces Open
Three different procedures are used to deposit aluminium onto O‐terminated (100) and (111) boron‐doped diamond, with the aim of producing a thermally stable surface with low work function and negative electron affinity. The methods are 1) …
View article: Surface-Alloying during Pb Underpotential Deposition on Au
Surface-Alloying during Pb Underpotential Deposition on Au Open
Surface-alloys can form spontaneously during the deposition of one metal onto another, especially in systems with a large lattice mismatch that do not have bulk counterparts (so-called immiscible systems). The spontaneous surface alloying …
View article: Empty‐State Band Mapping Using Momentum‐Resolved Secondary Electron Emission
Empty‐State Band Mapping Using Momentum‐Resolved Secondary Electron Emission Open
Material band structures of occupied electronic states are obtainable using conventional angle‐resolved photoemission experiments, leaving the unoccupied states far less explored. Here, an alternative approach is built on and expanded to i…
View article: Graphene-diamond junction photoemission microscopy and electronic interactions
Graphene-diamond junction photoemission microscopy and electronic interactions Open
Polycrystalline graphene was transferred onto differently terminated epitaxial layers of boron-doped diamond deposited onto single crystal substrates. Chemical and electronic characterisation was performed using energy-filtered photoemissi…
View article: Pulsed laser deposition of single phase n- and p-type Cu2O thin films with low resistivity
Pulsed laser deposition of single phase n- and p-type Cu2O thin films with low resistivity Open
Low resistivity (~3-24 mOhm.cm) with tunable n- and p-type phase pure Cu2O thin films have been grown by pulsed laser deposition at 25-200 0C by varying the background oxygen partial pressure (O2pp). Capacitance data obtained by electroche…
View article: Solar thermal characterization of micropatterned high temperature selective surfaces
Solar thermal characterization of micropatterned high temperature selective surfaces Open
We present measured optical absorptivity, emissivity, and maximum solar-heated temperatures for micropatterned molybdenum. The molybdenum samples were fabricated using laser micromachining and characterized using an integrating sphere and …
View article: Characterisation of thermionic emission current with a laser-heated system
Characterisation of thermionic emission current with a laser-heated system Open
Thermionic emitting materials are relevant for several technological applications like electron guns, X-ray sources, or thermionic energy converters. As new materials and surface functionalisations that enable thermionic emission are devel…
View article: Anodization study of epitaxial graphene: insights on the oxygen evolution reaction of graphitic materials
Anodization study of epitaxial graphene: insights on the oxygen evolution reaction of graphitic materials Open
The photoemission electron microscopy and x-ray photoemission spectroscopy were utilized for the study of anodized epitaxial graphene (EG) on silicon carbide as a fundamental aspect of the oxygen evolution reaction on graphitic materials. …
View article: Electrochemical Modification and Characterization of Topological Insulator Single Crystals
Electrochemical Modification and Characterization of Topological Insulator Single Crystals Open
We compare electrochemically modified or thiol-functionalized single-crystal samples of the topological insulator (TI) Bi2Te0.9Se2.1 to freshly cleaved/air-exposed control samples and use X-ray photoelectron spectroscopy (XPS) to investiga…
View article: Surface Investigation on Electrochemically Deposited Lead on Gold
Surface Investigation on Electrochemically Deposited Lead on Gold Open
Electrodeposition of Pb on Au has been of interest for the variety of surface phenomena such as the UnderPotential Deposition (UPD) and surface alloying. Here, we examined the interface between the electrodeposited Pb film on Au, using sur…
View article: Microscopic insight into the single step growth of in-plane heterostructures between graphene and hexagonal boron nitride
Microscopic insight into the single step growth of in-plane heterostructures between graphene and hexagonal boron nitride Open
Graphene-h-BN hybrid nanostructures are grown in one step on the Pt(111) surface by ultra-high vacuum chemical vapor deposition using a single precursor, the dimethylamino borane complex. By varying the deposition conditions, different nan…
View article: A theoretical study of substitutional boron–nitrogen clusters in diamond
A theoretical study of substitutional boron–nitrogen clusters in diamond Open
Substitutional clusters of multiple light element dopants are a promising route to the elusive shallow donor in diamond. To understand the behaviour of co-dopants, this report presents an extensive first principles study of possible cluste…
View article: Molybdenum gratings as a high‐temperature refractory platform for plasmonic heat generators in the infrared
Molybdenum gratings as a high‐temperature refractory platform for plasmonic heat generators in the infrared Open
The aim of this work is to study the heating efficiency of refractory microstructures by excitation of surface plasmon polaritons in the far infrared that can be used for high‐temperature applications. The work has designed metal grating c…