Ian D. Sharp
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View article: New larval host plant records for butterflies of the Kruger National Park and its surrounds, Limpopo & Mpumalanga, South Africa
New larval host plant records for butterflies of the Kruger National Park and its surrounds, Limpopo & Mpumalanga, South Africa Open
New butterfly larval host plants are recorded for the Kruger National Park area, by means of oviposition observations, raising larvae to adults and/ or larval feeding observations. Some oviposition observations are provided and discussed.
View article: Observations on the life history of the Southern Pied Woolly Legs, <i>Lachnocnema laches<i> Fabricius, 1793 (Lycaenidae: Miletinae) in the Mpumalanga lowveld
Observations on the life history of the Southern Pied Woolly Legs, <i>Lachnocnema laches<i> Fabricius, 1793 (Lycaenidae: Miletinae) in the Mpumalanga lowveld Open
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View article: <i>Pentila tropicalis<i> – new records from the Limpopo lowveld
<i>Pentila tropicalis<i> – new records from the Limpopo lowveld Open
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View article: <i>Hypolycaena philippus philippus<i> larva observed feeding on <i>Coniodactyum chevalieri<i> fungal galls parasitic to <i>Ziziphus mucronata<i>.
<i>Hypolycaena philippus philippus<i> larva observed feeding on <i>Coniodactyum chevalieri<i> fungal galls parasitic to <i>Ziziphus mucronata<i>. Open
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View article: Larval host plant records from Mpumalanga (Lepidoptera: Nymphalidae)
Larval host plant records from Mpumalanga (Lepidoptera: Nymphalidae) Open
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View article: Further observations on Lepidoptera larval host plants in the Lowveld, Mpumalanga Province, South Africa
Further observations on Lepidoptera larval host plants in the Lowveld, Mpumalanga Province, South Africa Open
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View article: Butterflies of Franklyn Park, and species diversity in the Mariepskop area, Mpumalanga Province, South Africa
Butterflies of Franklyn Park, and species diversity in the Mariepskop area, Mpumalanga Province, South Africa Open
The Mariepskop Mountain and its associated forests have been a favourite destination for Lepidoptera collectors and researchers alike for many decades. Nestled at the foot of the mountain where the forest gives way to woodland savanna is a…
View article: Sub-Bandgap Photon-to-Current Conversion in Bismuth Vanadate Photoanodes and Its Impact on the Maximum Photocurrent Density Achievable for Water Splitting
Sub-Bandgap Photon-to-Current Conversion in Bismuth Vanadate Photoanodes and Its Impact on the Maximum Photocurrent Density Achievable for Water Splitting Open
The physical properties of bismuth vanadate (BiVO4) make it an appealing semiconductor photoanode for water oxidation in photoelectrochemical cells that aim to produce hydrogen or other solar fuels. However, it has been estimated that its …
View article: Optical Spectroscopic Determination of Photoexcited Small-Polaron Hopping in Transition Metal Oxide Photocatalysts
Optical Spectroscopic Determination of Photoexcited Small-Polaron Hopping in Transition Metal Oxide Photocatalysts Open
Ultrafast small‐polaron formation profoundly shapes the electronic and catalytic behaviour of transition metal oxides (TMOs). Despite its significance, spectroscopic investigations of photoexcited polarons hopping in TMOs have remained unr…
View article: Water Oxidation and Degradation Mechanisms of BiVO<sub>4</sub> Photoanodes in Bicarbonate Electrolytes
Water Oxidation and Degradation Mechanisms of BiVO<sub>4</sub> Photoanodes in Bicarbonate Electrolytes Open
The photoelectrochemical hydrogen peroxide evolution reaction (HPER) has attracted increasing attention as an environmentally friendly approach to generate a commercially and industrially valuable water oxidation product. BiVO4 photoanodes…
View article: Preparation and Comparative Evaluation of Membrane Separators for Aqueous Electrochemical Nitrogen Reduction Reaction Measurements
Preparation and Comparative Evaluation of Membrane Separators for Aqueous Electrochemical Nitrogen Reduction Reaction Measurements Open
Catalyst screening for electrochemical nitrogen (N2) reduction to ammonia (NH3) suffers from spurious results caused by various sources of contamination associated with the experimental setup and the environment. As a crucial component of …
View article: GOTO065054+593624: An 8.5 mag amplitude dwarf nova identified in real time via Kilonova Seekers
GOTO065054+593624: An 8.5 mag amplitude dwarf nova identified in real time via Kilonova Seekers Open
Dwarf novae are astrophysical laboratories for probing the nature of accretion, binary mass transfer, and binary evolution, but their diverse observational characteristics continue to challenge our theoretical understanding. We here presen…
View article: Enhancing Direct Solar Water Splitting via ALD of Multifunctional TiO<sub>2</sub>/Pt Nanoparticle Coatings With Engineered Interfaces to GaAs/GaInP Tandem Cells
Enhancing Direct Solar Water Splitting via ALD of Multifunctional TiO<sub>2</sub>/Pt Nanoparticle Coatings With Engineered Interfaces to GaAs/GaInP Tandem Cells Open
Direct solar water splitting is a promising approach for sustainably producing hydrogen, but significant materials challenges must be overcome to achieve high efficiency and long‐term stability. This work demonstrates a tailored interface …
View article: Orientation-Driven Chirality Funnels in Chiral Low-Dimensional Lead-Halide Perovskite Heterostructures
Orientation-Driven Chirality Funnels in Chiral Low-Dimensional Lead-Halide Perovskite Heterostructures Open
Chiral hybrid metal-halide perovskites show low-symmetry crystal structures, large Rashba splitting, spin-filtering, and strong chiroptical activity. Circular dichroism and circularly polarized photoluminescence have been investigated in c…
View article: Fabrication of Functional 3D Nanoarchitectures via Atomic Layer Deposition on DNA Origami Crystals
Fabrication of Functional 3D Nanoarchitectures via Atomic Layer Deposition on DNA Origami Crystals Open
While DNA origami is a powerful bottom-up fabrication technique, the physical and chemical stability of DNA nanostructures is generally limited to aqueous buffer conditions. Wet chemical silicification can stabilize these structures but do…
View article: Interfacial Band-Edge Energetic Control
Interfacial Band-Edge Energetic Control Open
Direct photoelectrochemical water splitting offers a sustainable way to produce carbon-neutral solar fuels in a potentially cost-efficient and scalable way. To date, many devices have been developed to achieve overall water splitting using…
View article: Oxygen Incorporation as a Route to Nondegenerate Zinc Nitride Semiconductor Thin Films
Oxygen Incorporation as a Route to Nondegenerate Zinc Nitride Semiconductor Thin Films Open
Zinc nitride (Zn3N2) comprises earth-abundant elements, possesses a small direct bandgap, and is characterized by high electron mobility. While these characteristics make the material a promising compound semiconductor for various optoelec…
View article: GOTO065054+593624: a 8.5 mag amplitude dwarf nova identified in real time via Kilonova Seekers
GOTO065054+593624: a 8.5 mag amplitude dwarf nova identified in real time via Kilonova Seekers Open
Dwarf novae are astrophysical laboratories for probing the nature of accretion, binary mass transfer, and binary evolution -- yet their diverse observational characteristics continue to challenge our theoretical understanding. We here pres…
View article: Collective Motion of Methylammonium Cations Affects Phase Transitions and Self-Trapped Exciton Emission in A-Site Engineered MAPbI3 Films
Collective Motion of Methylammonium Cations Affects Phase Transitions and Self-Trapped Exciton Emission in A-Site Engineered MAPbI3 Films Open
Hybrid organic-inorganic halide perovskites are celebrated for their exceptional optoelectronic properties and facile fabrication processes, making them prime candidates for next-generation photovoltaic and optoelectronic devices. By incor…
View article: Collective motion of methylammonium cations affects phase transitions and self-trapped exciton emission in A-site engineered MAPbI <sub>3</sub> films
Collective motion of methylammonium cations affects phase transitions and self-trapped exciton emission in A-site engineered MAPbI <sub>3</sub> films Open
The incorporation of less polar ethylenediammonium (en 2+ ) into the A-site of MAPbI 3 interrupts the dipole–dipole interaction between MA + cations, consequently affecting the phase stability and destabilizing self-trapped excitons.
View article: Atomically Flat Dielectric Patterns for Bandgap Engineering and Lateral Junction Formation in MoSe<sub>2</sub> Monolayers
Atomically Flat Dielectric Patterns for Bandgap Engineering and Lateral Junction Formation in MoSe<sub>2</sub> Monolayers Open
Combining a precise sputter etching method with subsequent AlO x growth within an atomic layer deposition chamber enables the fabrication of atomically flat lateral patterns of SiO 2 and AlO x . The transfer of MoSe 2 monolayers onto these…
View article: Collective Motion of Methylammonium Cations Affects Phase Transition and Self-Trapped Exciton Emission in MAPbI3 Films
Collective Motion of Methylammonium Cations Affects Phase Transition and Self-Trapped Exciton Emission in MAPbI3 Films Open
Hybrid organic-inorganic halide perovskites are celebrated for their exceptional optoelectronic properties and facile fabrication methods, making them prime candidates for next-generation photovoltaic and optoelectronic devices. However, t…
View article: Amorphous nitride semiconductors with highly tunable optical and electronic properties: the benefits of disorder in Ca–Zn–N thin films
Amorphous nitride semiconductors with highly tunable optical and electronic properties: the benefits of disorder in Ca–Zn–N thin films Open
In amorphous Ca–Zn–N, charge carrier concentrations can be tuned across six orders of magnitude, without compromising their high mobilities and while offering tunable band gaps in the range from 1.4 to 2.0 eV, by solely adjusting the Ca to…
View article: Collective Motion of Methylammonium Cations Affects Phase Transition and Self-Trapped Exciton Emission in MAPbI3 Films
Collective Motion of Methylammonium Cations Affects Phase Transition and Self-Trapped Exciton Emission in MAPbI3 Films Open
Hybrid organic-inorganic halide perovskites are celebrated for their exceptional optoelectronic properties and facile fabrication methods, making them prime candidates for next-generation photovoltaic and optoelectronic devices. However, t…
View article: Ligand-Tuned AgBiS<sub>2</sub> Planar Heterojunctions Enable Efficient Ultrathin Solar Cells
Ligand-Tuned AgBiS<sub>2</sub> Planar Heterojunctions Enable Efficient Ultrathin Solar Cells Open
AgBiS2 quantum dots (ABS QDs) have emerged as highly promising candidates for photovoltaic applications due to their strong sunlight absorption, nontoxicity, and elemental availability. Nevertheless, the efficiencies of ABS solar cells cur…
View article: Broad Range Tuning of InAs Quantum Dot Emission for Nanophotonic Devices in the Telecommunication Bands
Broad Range Tuning of InAs Quantum Dot Emission for Nanophotonic Devices in the Telecommunication Bands Open
InAs semiconductor quantum dots (QDs) emitting in the near-infrared are promising platforms for on-demand single-photon sources and spin-photon interfaces. However, the realization of quantum-photonic nanodevices emitting in the telecom wi…
View article: Bixbyite‐Type Zirconium Tantalum Oxynitride Thin Films as Composition‐Tunable High Refractive Index Semiconductors
Bixbyite‐Type Zirconium Tantalum Oxynitride Thin Films as Composition‐Tunable High Refractive Index Semiconductors Open
Multinary nitrides and oxynitrides offer a range of tunable structural and optoelectronic properties. However, much of this vast compositional space remains to be explored due to the challenges associated with their synthesis. Here, reacti…
View article: Engineering a Cu‐Pd Paddle‐Wheel Metal–Organic Framework for Selective CO<sub>2</sub> Electroreduction
Engineering a Cu‐Pd Paddle‐Wheel Metal–Organic Framework for Selective CO<sub>2</sub> Electroreduction Open
Optimizing the binding energy between the intermediate and the active site is a key factor for tuning catalytic product selectivity and activity in the electrochemical carbon dioxide reduction reaction. Copper active sites are known to red…