A5031877516- nanoparticles nucleation surface interactions
- Diamond and Carbon-based Materials Research
- Perovskite Materials and Applications
- Quantum Dots Synthesis And Properties
- Advanced Chemical Physics Studies
- Chalcogenide Semiconductor Thin Films
- Electronic and Structural Properties of Oxides
- X-ray Diffraction in Crystallography
- Machine Learning in Materials Science
- High-pressure geophysics and materials
- Semiconductor materials and devices
- 2D Materials and Applications
- Transition Metal Oxide Nanomaterials
- Gas Sensing Nanomaterials and Sensors
- Surface and Thin Film Phenomena
- Graphene research and applications
- Spectroscopy and Quantum Chemical Studies
- Crystallization and Solubility Studies
- Ga2O3 and related materials
- Theoretical and Computational Physics
- Organic Electronics and Photovoltaics
- Photochemistry and Electron Transfer Studies
- ZnO doping and properties
- Quantum and electron transport phenomena
- Catalytic Processes in Materials Science
RMIT University
2016-2025
University of Colorado Boulder
2024
MIT University
2014-2024
Environmental Energy & Engineering
2024
National Renewable Energy Laboratory
2024
The University of Adelaide
2024
Imperial College London
2024
Leibniz-Institute for New Materials
2024
The University of Melbourne
2008-2023
Australian Research Council
2018-2023
Nitrogen dioxide (NO2) is a gas species that plays an important role in certain industrial, farming, and healthcare sectors. However, there are still significant challenges for NO2 sensing at low detection limits, especially the presence of other interfering gases. The selectivity current gas-sensing technologies significantly traded-off with their sensitivity reversibility as well fabrication operating costs. In this work, we present progress selective reversible by demonstrating economical...
We demonstrate that the energy bandgap of layered, high-dielectric α-MoO(3) can be reduced to values viable for fabrication 2D electronic devices. This is achieved through embedding Coulomb charges within high dielectric media, advantageously limiting charge scattering. As a result, devices with ∼11 nm thickness and carrier mobilities larger than 1100 cm(2) V(-1) s(-1) are obtained.
Tunable plasmon resonances in suspended 2D molybdenum oxide flakes are demonstrated. The configuration generates a large depolarization factor and the presence of ultra-doping produces visible-light resonances. process is conducted by reducing semiconducting MoO3 using simulated solar irradiation. generated can be controlled doping levels flakes' lateral dimensions, as well exposure to model protein.
Abstract A variety of deposition methods for two-dimensional crystals have been demonstrated; however, their wafer-scale remains a challenge. Here we introduce technique depositing and patterning metal chalcogenide compounds by transforming the native interfacial oxide layer low melting point precursors (group III IV) in liquid form. In an oxygen-containing atmosphere, these metals establish atomically thin self-limiting reaction. The increases wettability placed on oxygen-terminated...
Abstract The predicted strong piezoelectricity for monolayers of group IV monochalcogenides, together with their inherent flexibility, makes them likely candidates developing flexible nanogenerators. Within this group, SnS is a potential choice such nanogenerators due to its favourable semiconducting properties. To date, access large-area and highly crystalline monolayer has been challenging the presence inter-layer interactions by lone-pair electrons S. Here we report single crystal...
Abstract Catalytic solvent regeneration has attracted broad interest owing to its potential reduce energy consumption in CO 2 separation, enabling industry achieve emission reduction targets of the Paris Climate Accord. Despite recent advances, development engineered acidic nanocatalysts with unique characteristics remains a challenge. Herein, we establish strategy tailor physicochemical properties metal-organic frameworks (MOFs) for synthesis water-dispersible core-shell ease use. We...
Abstract Molybdenum disulfide (MoS 2 ), a two‐dimensional (2D) semiconducting material harbors intrinsic defects that can be harnessed to achieve tuneable electronic, optoelectronic, and electrochemical devices. However, achieving precise control over defect formation within monolayer MoS , remains notable challenge. Here, an in‐situ engineering approach for using pressure‐dependent chemical vapor deposition (CVD) process is presented. Monolayer grown in low pressure CVD conditions (LP‐MoS )...
We fit a new gold embedded atom method (EAM) potential using an improved force matching methodology which included fitting to high-temperature solid lattice constants and liquid densities. The shows good overall improvement in agreement the experimental constants, elastic stacking fault energy, radial distribution function, fcc/hcp/bcc energy differences over previous potentials by Foiles, Baskes, Daw (FBD) [Phys. Rev. B 33, 7983 (1986)] Johnson 37, 3924 (1988)], glue model Ercolessi et al....
Chemical reaction studies of N-methyl-N-propyl-pyrrolidinium-bis(fluorosulfonyl)imide-based ionic liquid with the lithium metal surface were performed using ab initio molecular dynamics (aMD) simulations and X-ray Photoelectron Spectroscopy (XPS). The showed rapid spontaneous decomposition anion, subsequent formation long-lived species such as fluoride. also revealed cation to retain its structure by generally moving away from surface. XPS experiments evidence consistent aMD it is envisaged...
Atomically thin semiconductors are one of the fastest growing categories in materials science due to their promise enable high-performance electronic and optical devices. Furthermore, a host intriguing phenomena have been reported occur when semiconductor is confined within two dimensions. However, synthesis large area atomically remains as significant technological challenge. Here we report method that allows harvesting monolayer semiconducting stannous oxide nanosheets (SnO) from...
Abstract Two-dimensional piezotronics will benefit from the emergence of new crystals featuring high piezoelectric coefficients. Gallium phosphate (GaPO 4 ) is an archetypal material, which does not naturally crystallise in a stratified structure and hence cannot be exfoliated using conventional methods. Here, we report low-temperature liquid metal-based two-dimensional printing synthesis strategy to achieve this goal. We exfoliate surface print interfacial oxide layer gallium, followed by...
We report the synthesis of centimeter sized ultrathin GaN and InN. The relies on ammonolysis liquid metal derived two-dimensional (2D) oxide sheets that were squeeze-transferred onto desired substrates. Wurtzite nanosheets featured typical thicknesses 1.3 nm, an optical bandgap 3.5 eV a carrier mobility 21.5 cm2 V-1 s-1, while InN thickness 2.0 nm. deposited highly crystalline, grew along (001) direction only three unit cells. method provides scalable approach for integration 2D morphologies...
Abstract Organic photovoltaic (OPV) materials are promising candidates for cheap, printable solar cells. However, there a very large number of potential donors and acceptors, making selection the best difficult. Here, we show that machine-learning approaches can leverage computationally expensive DFT calculations to estimate important OPV properties quickly accurately. We generate quantitative relationships between simple interpretable chemical signature one-hot descriptors power conversion...
Ultra sensitivity and selectivity were achieved by the physisorption of gases onto two dimensional tungsten oxides.
Abstract Room‐temperature synthesis of 2D graphitic materials (2D‐GMs) remains an elusive aim, especially with electrochemical means. Here, it is shown that liquid metals render this possible as they offer catalytic activity and ultrasmooth templating interface promotes Frank–van der Merwe regime growth, while allowing facile exfoliation due to the absence interfacial forces a nonpolar liquid. The 2D‐GMs are formed at low onset potential can be in situ doped depending on choice organic...
The introduction of trace impurities within the doping processes semiconductors is still a technological challenge for electronics industries. By taking advantage selective enrichment liquid metal interfaces, and harvesting doped oxide semiconductor layers, complexity process can be mitigated high degree control over outcomes achieved. Here, mechanism natural filtering preparation 2D semiconducting sheets based on different migration tendencies metallic elements in bulk competing enriching...
Halide perovskites have attracted enormous attention due to their potential applications in optoelectronics and photocatalysis. However, concerns over instability, toxicity, unsatisfactory efficiency necessitated the development of lead-free all-inorganic halide perovskites. A major challenge designing efficient for practical is lack effective methods producing nanocrystals with precise size shape control. In this work, a layered perovskite, Cs4ZnSb2Cl12 (CZS), found from calculations...
The size-dependent pressure response of oleate-stabilized CdSe quantum dots (QDs) in paraffin is investigated using diamond anvil cell experiments and density functional theory (DFT). For QDs above 3.0 nm, the photoluminescence shows a blue-shift around 43 meV/GPa, close to value for bulk CdSe, but shift increases strongly nanocrystals less than 3 nm size. Conversely, absorption 45 meV/GPa weakens 35 particles 1.5 No crystallographic phase transitions occur below 2 GPa, optical effects are...
Abstract Miniaturization and energy consumption by computational systems remain major challenges to address. Optoelectronics based synaptic light sensing provide an exciting platform for neuromorphic processing vision applications offering several advantages. It is highly desirable achieve single‐element image sensors that allow reception of information execution in‐memory computing processes while maintaining memory much longer durations without the need frequent electrical or optical...