Timothy J. Booth
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View article: Gradient Electronic Landscapes in van der Waals Heterostructures
Gradient Electronic Landscapes in van der Waals Heterostructures Open
Two-dimensional (2D) materials, such as graphene and hexagonal boron nitride (hBN), provide a versatile platform for quantum electronics. Experiments generally require encapsulation of graphene within hBN flakes, forming a protective van d…
View article: Morphometric characterization of Holocene mandibles expands the ecological baseline for understanding gibbon extinction dynamics
Morphometric characterization of Holocene mandibles expands the ecological baseline for understanding gibbon extinction dynamics Open
Human activities have driven biodiversity loss for millennia, and conservation of ‘refugee species’ that survive as remnant populations requires insights from historical baselines. However, reconstructing the past distribution and ecology …
View article: Fourier-Tailored Light-Matter Coupling in van der Waals Heterostructures
Fourier-Tailored Light-Matter Coupling in van der Waals Heterostructures Open
Dielectric structures can support low-absorption optical modes, which are attractive for engineering light-matter interactions with excitonic resonances in two-dimensional (2D) materials. However, the coupling strength is often limited by …
View article: Patterning and nanoribbon formation in graphene by hot punching
Patterning and nanoribbon formation in graphene by hot punching Open
Large area graphene patterning is critical for applications. Current graphene patterning techniques, such as electron beam lithography and nano imprint lithography, are time consuming and can scale unfavorably with sample size. Resist-base…
View article: Quantitative mapping of smooth topographic landscapes produced by thermal scanning-probe lithography
Quantitative mapping of smooth topographic landscapes produced by thermal scanning-probe lithography Open
Scanning probe microscopy (SPM) is a powerful technique for mapping nanoscale surface properties through tip-sample interactions. Thermal scanning-probe lithography (tSPL) is an advanced SPM variant that uses a silicon tip on a heated cant…
View article: Recommendations and tools to enable reproducibility in 2D materials research
Recommendations and tools to enable reproducibility in 2D materials research Open
Research on 2D materials has achieved significant milestones and fuelled a rapidly growing industrial sector. This progress, however, is accompanied by challenges in reproducibility, arising from the atomic thinness, fragility, and environ…
View article: Mapping nanoscale carrier confinement in polycrystalline graphene by terahertz spectroscopy
Mapping nanoscale carrier confinement in polycrystalline graphene by terahertz spectroscopy Open
Terahertz time-domain spectroscopy (THz-TDS) can be used to map spatial variations in electrical properties such as sheet conductivity, carrier density, and carrier mobility in graphene. Here, we consider wafer-scale graphene grown on germ…
View article: Simultaneous dual-configuration van der Pauw measurements of gated graphene devices
Simultaneous dual-configuration van der Pauw measurements of gated graphene devices Open
The van der Pauw technique is the gold standard for measuring the sheet resistance of thin conductors by relying on the combination of two 4-point resistance measurements obtained in different current–voltage probe configurations. The pres…
View article: Terahertz s-SNOM reveals nanoscale conductivity of graphene
Terahertz s-SNOM reveals nanoscale conductivity of graphene Open
The nanoscale contrast in scattering-type scanning near-field optical microscopy (s-SNOM) is determined by the optical properties of the sample immediately under the apex of the tip of the atomic force microscope (AFM). There are several m…
View article: Mapping nanoscale carrier confinement in polycrystalline graphene by terahertz spectroscopy
Mapping nanoscale carrier confinement in polycrystalline graphene by terahertz spectroscopy Open
Terahertz time-domain spectroscopy (THz-TDS) can be used to map spatial variations in electrical properties such as sheet conductivity, carrier density, and carrier mobility in graphene. Here, we consider wafer-scale graphene grown on germ…
View article: Lifetime of MoS2 based DFL systems in fretting with and without a Cu-Ni-In under-layer: The dependence on the topography of the surface onto which the DFL is deposited
Lifetime of MoS2 based DFL systems in fretting with and without a Cu-Ni-In under-layer: The dependence on the topography of the surface onto which the DFL is deposited Open
The superior fretting performance of polymer-bonded MoS2-based dry film lubricant (DFL) coating on a plasma-sprayed Cu-Ni-In under-layer is well known. The Cu-Ni-In under-layer changes both the material and the topography of the surface on…
View article: Molybdenum Disulfide Nanoribbons with Enhanced Edge Nonlinear Response and Photoresponsivity
Molybdenum Disulfide Nanoribbons with Enhanced Edge Nonlinear Response and Photoresponsivity Open
MoS 2 nanoribbons have attracted increased interest due to their properties, which can be tailored by tuning their dimensions. Herein, the growth of MoS 2 nanoribbons and triangular crystals formed by the reaction between films of MoOx (2<…
View article: A High-Performance Quasi-1D MoS$_2$ Nanoribbon Photodetector
A High-Performance Quasi-1D MoS$_2$ Nanoribbon Photodetector Open
Molybdenum disulfide (MoS$_2$) nanoribbons have attracted increased interest due to their properties which can be tailored by tuning their dimensions. Herein, we demonstrate the growth of highly crystalline quasi-one-dimensional (1D)MoS$_2…
View article: Photon superbunching in cathodoluminescence of excitons in WS<sub>2</sub>monolayer
Photon superbunching in cathodoluminescence of excitons in WS<sub>2</sub>monolayer Open
Cathodoluminescence spectroscopy in conjunction with second-order auto-correlation measurements of allows to extensively study the synchronization of photon emitters in low-dimensional structures. Co-existing excitons in two-dimensional t…
View article: The Ambivalent Dead: Curation, Excarnation and Complex Post-mortem Trajectories in Middle and Late Bronze Age Britain
The Ambivalent Dead: Curation, Excarnation and Complex Post-mortem Trajectories in Middle and Late Bronze Age Britain Open
This paper sets out the results of radiocarbon, histological, and contextual analysis of human remains from non-mortuary contexts in Middle and Late Bronze Age Britain. In the latter period in particular, human bone (much of it fragmentary…
View article: Fermi Level Depinning in Two-Dimensional Materials Using a Fluorinated Bilayer Graphene Barrier
Fermi Level Depinning in Two-Dimensional Materials Using a Fluorinated Bilayer Graphene Barrier Open
Strong Fermi level pinning (FLP) - often attributed to metal-induced gap states at the interfacial contacts - severely reduces the tunability of the Schottky barrier height of the junction and limits applications of the 2D materials in ele…
View article: Stacking and Twisting of Freestanding Complex Oxide Thin Films
Stacking and Twisting of Freestanding Complex Oxide Thin Films Open
The integration of dissimilar materials in heterostructures has long been a cornerstone of modern materials science—seminal examples are 2D materials and van der Waals heterostructures. Recently, new methods have been developed that enable…
View article: Chemical Vapor-Deposited Graphene on Ultraflat Copper Foils for van der Waals Hetero-Assembly
Chemical Vapor-Deposited Graphene on Ultraflat Copper Foils for van der Waals Hetero-Assembly Open
The purity and morphology of the copper surface is important for the synthesis of high-quality, large-grained graphene by chemical vapor deposition. We find that atomically smooth copper foils-fabricated by physical vapor deposition and su…
View article: Brobdingnagian photon bunching in cathodoluminescence of excitons in\n WS$_2$ monolayer
Brobdingnagian photon bunching in cathodoluminescence of excitons in\n WS$_2$ monolayer Open
Cathodoluminescence spectroscopy in conjunction with second-order\nauto-correlation measurements of $g_2(\\tau)$ allows to extensively study the\nsynchronization of quantum light sources in low-dimensional structures.\nCo-existing excitons…
View article: Brobdingnagian photon bunching in cathodoluminescence of excitons in WS$_2$ monolayer
Brobdingnagian photon bunching in cathodoluminescence of excitons in WS$_2$ monolayer Open
Cathodoluminescence spectroscopy in conjunction with second-order auto-correlation measurements of $g_2(τ)$ allows to extensively study the synchronization of quantum light sources in low-dimensional structures. Co-existing excitons in two…
View article: Universal Non-Volatile Resistive Switching Behavior in 2D Metal Dichalcogenides Featuring Unique Conductive-Point Random Access Memory Effect
Universal Non-Volatile Resistive Switching Behavior in 2D Metal Dichalcogenides Featuring Unique Conductive-Point Random Access Memory Effect Open
Two-dimensional materials have been discovered to exhibit non-volatile resistive switching (NVRS) phenomenon. In our work, we reported the universal NVRS behavior in a dozen metal dichalcogenides, featuring low switching voltage, large on/…
View article: Super-Resolution Nanolithography of Two-Dimensional Materials by Anisotropic Etching
Super-Resolution Nanolithography of Two-Dimensional Materials by Anisotropic Etching Open
Nanostructuring allows altering of the electronic and photonic properties of two-dimensional (2D) materials. The efficiency, flexibility, and convenience of top-down lithography processes are, however, compromised by nanometer-scale edge r…
View article: Universal Non-Volatile Resistive Switching Behavior in 2D Metal Dichalcogenides Featuring Unique Conductive-Point Random Access Memory Effect
Universal Non-Volatile Resistive Switching Behavior in 2D Metal Dichalcogenides Featuring Unique Conductive-Point Random Access Memory Effect Open
Two-dimensional materials have been discovered to exhibit non-volatile\nresistive switching (NVRS) phenomenon. In our work, we reported the universal\nNVRS behavior in a dozen metal dichalcogenides, featuring low switching\nvoltage, large …
View article: Case studies of electrical characterisation of graphene by terahertz time-domain spectroscopy
Case studies of electrical characterisation of graphene by terahertz time-domain spectroscopy Open
Graphene metrology needs to keep up with the fast pace of developments in graphene growth and transfer. Terahertz time-domain spectroscopy (THz-TDS) is a non-contact, fast, and non-destructive characterization technique for mapping the ele…
View article: Case studies of electrical characterisation of graphene by terahertz time-domain spectroscopy
Case studies of electrical characterisation of graphene by terahertz time-domain spectroscopy Open
Graphene metrology needs to keep up with the fast pace of developments in graphene growth and transfer. Terahertz time-domain spectroscopy (THz-TDS) is a non-contact, fast, and non-destructive characterization technique for mapping the ele…
View article: cblaster: a remote search tool for rapid identification and visualisation of homologous gene clusters
cblaster: a remote search tool for rapid identification and visualisation of homologous gene clusters Open
Genes involved in coordinated biological pathways, including metabolism, drug resistance and virulence, are often collocalised as gene clusters. Identifying homologous gene clusters aids in the study of their function and evolution, howeve…
View article: Comparative study of copper oxidation protection with graphene and hexagonal boron nitride
Comparative study of copper oxidation protection with graphene and hexagonal boron nitride Open
The use of protective barriers to isolate a metal surface from an aggressive environment is a common way to inhibit its degradation. We used ambient pressure x-ray photoelectron spectroscopy to assess in real time the evolution of the copp…