ORCID Profile
0000-0002-5860-8938
Current Organisations
RMIT University
,
University of Melbourne
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Inorganic materials (incl. nanomaterials) | Materials engineering | Functional materials
Publisher: American Association for the Advancement of Science (AAAS)
Date: 20-10-2017
Abstract: Two-dimensional (2D) materials have a wide variety of potential applications in the electronics industry. However, certain compositions of 2D materials are difficult to obtain owing to the challenges in exfoliating thin sheets from bulk crystals. Zavabeti et al. exploited liquid metals to synthesize 2D Ga 2 O 3 , HfO 2 , Gd 2 O 3 , and Al 2 O 3 . The 2D sheets appear as a surface layer in gallium-based liquid metals after the Hf, Gd, or Al is dissolved into the bulk alloy. The 2D oxide that appears on the surface is the oxide with the lowest energy, suggesting that it should be possible to make other 2D oxides by using the same process. Science , this issue p. 332
Publisher: MDPI AG
Date: 09-02-2019
DOI: 10.3390/NANO9020235
Abstract: Ga–Sn–Zn eutectic alloy is a non-toxic liquid metal alloy which could be used in a multitude of applications, including as a heat transfer agent, in gas sensing, and in medicine. Alloys containing gallium readily oxidise in air, forming a thin oxide layer that influences the properties of liquid metals and which has not been studied. In this study, the oxide layer formed on Ga–Sn–Zn alloy was transferred at room temperature onto three substrates—quartz, glass and silicon. The contact angle between the liquid alloy and different substrates was determined. The obtained thin oxide films were characterised using atomic force microscopy, X-ray photon spectroscopy, and optical and transmission electron microscopy. The contact angle does not influence the deposition of the layers. It was determined that it is possible to obtain nanometric oxide layers of a few micrometres in size. The chemical composition was determined by XPS and EDS independently, and showed that the oxide layer contains about 90 atom % of gallium with some additions of tin and zinc. The oxides obtained from the eutectic Ga–Sn–Zn liquid alloys appear to be nanocrystalline.
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/C9TA11945K
Abstract: Ultrathin α-Fe 2 O 3 and FeP are synthesized by engineering the lattice matching degree between water-soluble template and target material for hydrogen evolution reaction.
Publisher: Springer Science and Business Media LLC
Date: 18-01-2021
Publisher: Springer Science and Business Media LLC
Date: 10-03-2022
DOI: 10.1038/S41467-022-28869-6
Abstract: Catalytic solvent regeneration has attracted broad interest owing to its potential to reduce energy consumption in CO 2 separation, enabling industry to achieve emission reduction targets of the Paris Climate Accord. Despite recent advances, the development of engineered acidic nanocatalysts with unique characteristics remains a challenge. Herein, we establish a strategy to tailor the physicochemical properties of metal-organic frameworks (MOFs) for the synthesis of water-dispersible core-shell nanocatalysts with ease of use. We demonstrate that functionalized nanoclusters (Fe 3 O 4 -COOH) effectively induce missing-linker deficiencies and fabricate mesoporosity during the self-assembly of MOFs. Superacid sites are created by introducing chelating sulfates on the uncoordinated metal clusters, providing high proton donation capability. The obtained nanomaterials drastically reduce the energy consumption of CO 2 capture by 44.7% using only 0.1 wt.% nanocatalyst, which is a ∽10-fold improvement in efficiency compared to heterogeneous catalysts. This research represents a new avenue for the next generation of advanced nanomaterials in catalytic solvent regeneration.
Publisher: Elsevier BV
Date: 12-2020
Publisher: Wiley
Date: 03-12-2022
Abstract: The need for effective and adaptive technologies for carbon dioxide (CO 2 ) mitigation targeting global net‐zero carbon emissions is critically growing. Hence, innovative technologies for CO 2 reduction have attracted worldwide interest from scientific research communities. The use of liquid metals for the conversion of CO 2 into carbon or solid carbonaceous products has gained increasing attention in recent years due to their high activity and resistance to coking. Here, a facile approach for the reduction of CO 2 to solid carbon using liquid Mg at and near room temperature, and atmospheric pressure is presented. In this process, magnesium (Mg) plays a major role in driving the dissociation of CO 2 to its elemental constituents, carbon and oxygen. During the reaction process, Mg ions dissolve in gallium (Ga) liquid metal alloy, diffuse to the gas–liquid interface, and reduce CO 2 to carbon while undergoing an oxidation reaction. The electrochemical method ensures a sustainable cyclic process by reducing Mg and Ga ions back to their metallic counterpart. The use of liquid metal alloys for CO 2 reduction reactions can enable to achieve CO 2 capture and storage at room temperature, setting a new foundation for the future exploration of efficient CO 2 mitigation issues.
Publisher: American Chemical Society (ACS)
Date: 11-03-2022
Abstract: Active regulation of pore accessibility in microporous materials by external stimuli has aroused great attention in recent years. Here, we show the first experimental proof that guest adsorption in a dielectric microporous material can be regulated by a moderate external E-field below the gas breakdown voltage. CO
Publisher: Royal Society of Chemistry (RSC)
Date: 2023
DOI: 10.1039/D3TA00408B
Abstract: Gallium as a solvent liquid metal catalyst is used in an energy efficient, high yield and controlled reaction between lithium and CO 2 . A liquid metal electrode and the naturally formed surface products are used as a supercapacitor.
Publisher: Wiley
Date: 13-02-2019
Publisher: Elsevier BV
Date: 11-2023
Publisher: Springer Science and Business Media LLC
Date: 22-03-2017
DOI: 10.1038/NCOMMS15116
Abstract: Nature Communications 8: Article number: 14482 published: 17 February 2017 Updated: 22 March 2017 The original version of this Article contained a typographical error in the spelling of the author Omid Kavehei, which was incorrectly given as Omid Kevehei. This has now been corrected in both the PDF and HTML versions of the Article.
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7TA07705J
Abstract: The development of earth-abundant electrocatalysts for hydrogen evolution, with high activity and stability, is of great interest in the field of clean energy.
Publisher: Springer Science and Business Media LLC
Date: 21-03-2018
DOI: 10.1038/S41467-018-03544-X
Abstract: Cleavage of transfer (t)RNA and ribosomal (r)RNA are critical and conserved steps of translational control for cells to overcome varied environmental stresses. However, enzymes that are responsible for this event have not been fully identified in high eukaryotes. Here, we report a mammalian tRNA/rRNA-targeting endoribonuclease: SLFN13, a member of the Schlafen family. Structural study reveals a unique pseudo-dimeric U-pillow-shaped architecture of the SLFN13 N′-domain that may cl base-paired RNAs. SLFN13 is able to digest tRNAs and rRNAs in vitro, and the endonucleolytic cleavage dissevers 11 nucleotides from the 3′-terminus of tRNA at the acceptor stem. The cytoplasmically localised SLFN13 inhibits protein synthesis in 293T cells. Moreover, SLFN13 restricts HIV replication in a nucleolytic activity-dependent manner. According to these observations, we term SLFN13 RNase S13. Our study provides insights into the modulation of translational machinery in high eukaryotes, and sheds light on the functional mechanisms of the Schlafen family.
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8NR03788D
Abstract: Atomically thin layers of Bi 2 O 3 are isolated from liquid bismuth, allowing the development of ultrafast 2D-enabled UV photo-detectors.
Publisher: Elsevier BV
Date: 04-2022
Publisher: Elsevier BV
Date: 06-2023
Publisher: American Chemical Society (ACS)
Date: 08-10-2021
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D1NR02529E
Abstract: Biosensors are essential components for effective healthcare management.
Publisher: Royal Society of Chemistry (RSC)
Date: 2022
DOI: 10.1039/D2NR01135B
Abstract: Gas-liquid reaction phenomena on liquid-metal solvents can be used to form intriguing 2D materials with large lateral dimensions, where the free energies of formation determine the final product. A vast selection of elements can be incorporated into the liquid metal-based nanostructures, offering a versatile platform for fabricating novel optoelectronic devices. While conventional doping techniques of semiconductors present several challenges for 2D materials. Liquid metals provide a facile route for obtaining doped 2D semiconductors. In this work, we successfully demonstrate that the doping of 2D SnS can be realized in a glove box containing a diluted H
Publisher: American Chemical Society (ACS)
Date: 28-04-2015
Publisher: American Chemical Society (ACS)
Date: 23-11-2021
Publisher: American Chemical Society (ACS)
Date: 05-10-2023
Publisher: American Chemical Society (ACS)
Date: 31-08-2021
Publisher: American Chemical Society (ACS)
Date: 28-06-2019
Publisher: Elsevier BV
Date: 12-2023
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7NR05403C
Abstract: Ultra sensitivity and selectivity were achieved by the physisorption of gases onto two dimensional tungsten oxides.
Publisher: American Chemical Society (ACS)
Date: 06-2018
Publisher: American Chemical Society (ACS)
Date: 14-07-2022
Publisher: American Chemical Society (ACS)
Date: 26-01-0001
Publisher: IEEE
Date: 05-2009
Publisher: Elsevier BV
Date: 07-2019
Publisher: Wiley
Date: 12-09-2021
Abstract: The introduction of trace impurities within the doping processes of semiconductors is still a technological challenge for the electronics industries. By taking advantage of the selective enrichment of liquid metal interfaces, and harvesting the doped metal oxide semiconductor layers, the complexity of the process can be mitigated and a high degree of control over the outcomes can be achieved. Here, a mechanism of natural filtering for the preparation of doped 2D semiconducting sheets based on the different migration tendencies of metallic elements in the bulk competing for enriching the interfaces is proposed. As a model, liquid metal alloys with different weight ratios of Sn and Bi in the bulk are employed for harvesting Bi 2 O 3 ‐doped SnO nanosheets. In this model, Sn shows a much stronger tendency than Bi to occupy surface sites of the Bi–Sn alloys, even at the very high concentrations of Bi in the bulk. This provides the opportunity for creating SnO 2D sheets with tightly controlled Bi 2 O 3 dopants. By way of ex le, it is demonstrated how such nanosheets could be made selective to both reducing and oxidizing environmental gases. The process demonstrated here offers significant opportunities for future synthesis and fabrication processes in the electronics industries.
Publisher: American Chemical Society (ACS)
Date: 20-12-0020
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D0DT04364H
Abstract: The emerging field of liquid metal facilitated 2D material synthesis is reviewed in this perspective. Design strategies that utilise Cabrera–Mott oxidation to grow 2D nanosheets are explored, and the potential new application fields are highlighted.
Publisher: Elsevier BV
Date: 03-2022
Publisher: Wiley
Date: 18-01-2018
Publisher: Elsevier BV
Date: 12-2022
Publisher: Wiley
Date: 19-09-2023
Publisher: Elsevier BV
Date: 07-2018
Publisher: Royal Society of Chemistry (RSC)
Date: 2023
DOI: 10.1039/D2NR05926F
Abstract: Various non-stratified two-dimensional (2D) materials can be obtained from liquid metal surfaces that are not naturally accessible.
Publisher: Wiley
Date: 10-03-2022
Abstract: Interfacial modular assemblies of eco‐friendly metal–phenolic networks (MPNs) are of interest for surface and materials engineering. To date, most MPNs are assembled on water‐stable substrates however, the self‐assembly of MPNs on highly water‐soluble substrates remains unexplored. Herein, a versatile approach is reported to engineer thickness‐tunable coatings (2–25 µm) on a water‐soluble substrate (i.e., urea) via the self‐assembly of MPNs in a nonaqueous solvent (i.e., acetonitrile). The coordination‐driven assembly of the MPN coatings in the nonaqueous solvent is distinct from that in aqueous systems, as the assembly is only achieved following the addition of urea granules into the iron–tannin solution. The coating occurs relatively rapidly (5–60 min), generating micrometer‐thick coatings from the adsorption of Fe III –TA complexes and micrometer‐sized Fe III –TA particles formed in solution. The straightforward nature of the present fabrication method in generating thick and robust coatings with high stability in nonaqueous environments (including at 60 °C) coupled with the broad range of available naturally abundant polyphenol–metal ion combinations expand the applicability of MPNs as coatings for water‐soluble materials, thus providing new opportunities for their broader application in a range of industrial processes and applications.
Publisher: MDPI AG
Date: 11-08-2020
DOI: 10.3390/S20164484
Abstract: Advancements in materials science and fabrication techniques have contributed to the significant growing attention to a wide variety of sensors for digital healthcare. While the progress in this area is tremendously impressive, few wearable sensors with the capability of real-time blood pressure monitoring are approved for clinical use. One of the key obstacles in the further development of wearable sensors for medical applications is the lack of comprehensive technical evaluation of sensor materials against the expected clinical performance. Here, we present an extensive review and critical analysis of various materials applied in the design and fabrication of wearable sensors. In our unique transdisciplinary approach, we studied the fundamentals of blood pressure and examined its measuring modalities while focusing on their clinical use and sensing principles to identify material functionalities. Then, we carefully reviewed various categories of functional materials utilized in sensor building blocks allowing for comparative analysis of the performance of a wide range of materials throughout the sensor operational-life cycle. Not only this provides essential data to enhance the materials’ properties and optimize their performance, but also, it highlights new perspectives and provides suggestions to develop the next generation pressure sensors for clinical use.
Publisher: American Chemical Society (ACS)
Date: 20-01-2022
Abstract: Understanding the air stability of MnBi
Publisher: Royal Society of Chemistry (RSC)
Date: 2023
DOI: 10.1039/D3CP01834B
Abstract: Na + cations change the 8MR pore aperture and limit the accessibility of different gas molecules to the internal pores of ZSM-25.
Publisher: Royal Society of Chemistry (RSC)
Date: 2023
DOI: 10.1039/D2NR06733A
Abstract: Spontaneous reactions at the interface of liquid metals with aqueous solutions are utilised for surface decoration and electronic band structure modulation.
Publisher: American Chemical Society (ACS)
Date: 07-11-2017
DOI: 10.1021/ACS.NANOLETT.7B04050
Abstract: We demonstrate a magnetocaloric ferrofluid based on a gadolinium saturated liquid metal matrix, using a gallium-based liquid metal alloy as the solvent and suspension medium. The material is liquid at room temperature, while exhibiting spontaneous magnetization and a large magnetocaloric effect. The magnetic properties were attributed to the formation of gadolinium nanoparticles suspended within the liquid gallium alloy, which acts as a reaction solvent during the nanoparticle synthesis. High nanoparticle weight fractions exceeding 2% could be suspended within the liquid metal matrix. The liquid metal ferrofluid shows promise for magnetocaloric cooling due to its high thermal conductivity and its liquid nature. Magnetic and thermoanalytic characterizations reveal that the developed material remains liquid within the temperature window required for domestic refrigeration purposes, which enables future fluidic magnetocaloric devices. Additionally, the observed formation of nanometer-sized metallic particles within the supersaturated liquid metal solution has general implications for chemical synthesis and provides a new synthetic pathway toward metallic nanoparticles based on highly reactive rare earth metals.
Publisher: Springer Science and Business Media LLC
Date: 26-02-2019
DOI: 10.1038/S41467-019-08824-8
Abstract: Negative carbon emission technologies are critical for ensuring a future stable climate. However, the gaseous state of CO 2 does render the indefinite storage of this greenhouse gas challenging. Herein, we created a liquid metal electrocatalyst that contains metallic elemental cerium nanoparticles, which facilitates the electrochemical reduction of CO 2 to layered solid carbonaceous species, at a low onset potential of −310 mV vs CO 2 /C. We exploited the formation of a cerium oxide catalyst at the liquid metal/electrolyte interface, which together with cerium nanoparticles, promoted the room temperature reduction of CO 2 . Due to the inhibition of van der Waals adhesion at the liquid interface, the electrode was remarkably resistant to deactivation via coking caused by solid carbonaceous species. The as-produced solid carbonaceous materials could be utilised for the fabrication of high-performance capacitor electrodes. Overall, this liquid metal enabled electrocatalytic process at room temperature may result in a viable negative emission technology.
Publisher: American Chemical Society (ACS)
Date: 13-09-2021
DOI: 10.1021/JACS.1C06230
Publisher: Springer Science and Business Media LLC
Date: 17-02-2017
DOI: 10.1038/NCOMMS14482
Abstract: A variety of deposition methods for two-dimensional crystals have been demonstrated however, their wafer-scale deposition remains a challenge. Here we introduce a technique for depositing and patterning of wafer-scale two-dimensional metal chalcogenide compounds by transforming the native interfacial metal oxide layer of low melting point metal precursors (group III and IV) in liquid form. In an oxygen-containing atmosphere, these metals establish an atomically thin oxide layer in a self-limiting reaction. The layer increases the wettability of the liquid metal placed on oxygen-terminated substrates, leaving the thin oxide layer behind. In the case of liquid gallium, the oxide skin attaches exclusively to a substrate and is then sulfurized via a relatively low temperature process. By controlling the surface chemistry of the substrate, we produce large area two-dimensional semiconducting GaS of unit cell thickness (∼1.5 nm). The presented deposition and patterning method offers great commercial potential for wafer-scale processes.
Publisher: American Chemical Society (ACS)
Date: 16-01-2020
Publisher: Royal Society of Chemistry (RSC)
Date: 2022
DOI: 10.1039/D1EE03283F
Abstract: We present a simple alternative pathway to transform carbon dioxide to perpetually stored solid carbon.
Publisher: American Chemical Society (ACS)
Date: 14-11-2018
Abstract: The family of crystals constituting covalently bound strings, held together by van der Waals forces, can be exfoliated into smaller entities, similar to crystals made of van der Waals sheets. Depending on the anisotropy of such crystals, as well as the spacing between their strings in each direction, van der Waals sheets or ribbons can be obtained after the exfoliation process. In this work, we demonstrate that ultrathin nanoribbons of bismuth sulfide (Bi
Publisher: Royal Society of Chemistry (RSC)
Date: 2022
DOI: 10.1039/D1CS01166A
Abstract: The surfaces of liquid metals can serve as a platform to synthesise two-dimensional materials. By exploiting the self-limiting Cabrera-Mott oxidation reaction that takes place at the surface of liquid metals exposed to ambient air, an ultrathin oxide layer can be synthesised and isolated. Several synthesis approaches based on this phenomenon have been developed in recent years, resulting in a erse family of functional 2D materials that covers a significant fraction of the periodic table. These straightforward and inherently scalable techniques may enable the fabrication of novel devices and thus harbour significant application potential. This review provides a brief introduction to liquid metals and their alloys, followed by detailed guidance on each developed synthesis technique, post-growth processing methods, integration processes, as well as potential applications of the developed materials.
Publisher: American Chemical Society (ACS)
Date: 10-01-2023
Publisher: American Chemical Society (ACS)
Date: 20-07-2018
Publisher: IEEE
Date: 10-2017
Publisher: Wiley
Date: 24-01-2019
Abstract: Silicon photonics has demonstrated great potential in ultrasensitive biochemical sensing. However, it is challenging for such sensors to detect small ions which are also of great importance in many biochemical processes. A silicon photonic ion sensor enabled by an ionic dopant-driven plasmonic material is introduced here. The sensor consists of a microring resonator (MRR) coupled with a 2D restacked layer of near-infrared plasmonic molybdenum oxide. When the 2D plasmonic layer interacts with ions from the environment, a strong change in the refractive index results in a shift in the MRR resonance wavelength and simultaneously the alteration of plasmonic absorption leads to the modulation of MRR transmission power, hence generating dual sensing outputs which is unique to other optical ion sensors. Proof-of-concept via a pH sensing model is demonstrated, showing up to 7 orders improvement in sensitivity per unit area across the range from 1 to 13 compared to those of other optical pH sensors. This platform offers the unique potential for ultrasensitive and robust measurement of changes in ionic environment, generating new modalities for on-chip chemical sensors in the micro/nanoscale.
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C7CC09040D
Abstract: The exfoliation of two dimensional (2D) oxides, established on the surface of specific liquid metals, has recently been introduced.
Publisher: American Chemical Society (ACS)
Date: 22-04-2021
Publisher: American Chemical Society (ACS)
Date: 14-06-2017
Abstract: Sulfur-rich molybdenum sulfides are an emerging class of inorganic coordination polymers that are predominantly utilized for their superior catalytic properties. Here we investigate surface water dependent properties of sulfur-rich MoS
Publisher: American Chemical Society (ACS)
Date: 07-09-2023
Publisher: Springer Science and Business Media LLC
Date: 10-07-2020
DOI: 10.1038/S41467-020-17296-0
Abstract: The predicted strong piezoelectricity for monolayers of group IV monochalcogenides, together with their inherent flexibility, makes them likely candidates for developing flexible nanogenerators. Within this group, SnS is a potential choice for such nanogenerators due to its favourable semiconducting properties. To date, access to large-area and highly crystalline monolayer SnS has been challenging due to the presence of strong inter-layer interactions by the lone-pair electrons of S. Here we report single crystal across-the-plane and large-area monolayer SnS synthesis using a liquid metal-based technique. The characterisations confirm the formation of atomically thin SnS with a remarkable carrier mobility of ~35 cm 2 V −1 s −1 and piezoelectric coefficient of ~26 pm V −1 . Piezoelectric nanogenerators fabricated using the SnS monolayers demonstrate a peak output voltage of ~150 mV at 0.7% strain. The stable and flexible monolayer SnS can be implemented into a variety of systems for efficient energy harvesting.
Publisher: Springer Science and Business Media LLC
Date: 24-01-2020
Publisher: Elsevier BV
Date: 2022
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0CC01456G
Abstract: The library of two-dimensional materials is limited since many transition metal compounds are not stratified and can thus not be easily isolated as nanosheets. Liquid metal-based synthesis provides a new approach to overcome this limitation.
Publisher: American Physical Society (APS)
Date: 08-11-2018
Publisher: American Chemical Society (ACS)
Date: 13-10-2021
Publisher: American Chemical Society (ACS)
Date: 20-12-2019
DOI: 10.1021/JACS.8B11483
Abstract: We report the synthesis of centimeter sized ultrathin GaN and InN. The synthesis relies on the ammonolysis of liquid metal derived two-dimensional (2D) oxide sheets that were squeeze-transferred onto desired substrates. Wurtzite GaN nanosheets featured typical thicknesses of 1.3 nm, an optical bandgap of 3.5 eV and a carrier mobility of 21.5 cm
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C8TA08330D
Abstract: Planner hexagonal molybdenum oxide as an emerging electrocatalyst for the hydrogen evolution reaction (HER) in alkaline media.
Publisher: Elsevier BV
Date: 09-2018
Publisher: Springer Science and Business Media LLC
Date: 04-08-2016
DOI: 10.1038/NCOMMS12402
Abstract: Components with self-propelling abilities are important building blocks of small autonomous systems and the characteristics of liquid metals are capable of fulfilling self-propulsion criteria. To date, there has been no exploration regarding the effect of electrolyte ionic content surrounding a liquid metal for symmetry breaking that generates motion. Here we show the controlled actuation of liquid metal droplets using only the ionic properties of the aqueous electrolyte. We demonstrate that pH or ionic concentration gradients across a liquid metal droplet induce both deformation and surface Marangoni flow. We show that the Lippmann dominated deformation results in maximum velocity for the self-propulsion of liquid metal droplets and illustrate several key applications, which take advantage of such electrolyte-induced motion. With this finding, it is possible to conceive the propulsion of small entities that are constructed and controlled entirely with fluids, progressing towards more advanced soft systems.
Publisher: American Chemical Society (ACS)
Date: 10-2019
DOI: 10.1021/ACSSENSORS.9B01537
Abstract: Owing to their excellent hydrogen surface susceptibility, TiO
Publisher: Wiley
Date: 21-09-2018
Publisher: MDPI AG
Date: 22-09-2022
DOI: 10.3390/CROPS2040024
Abstract: Protected cropping produces more food per land area than field-grown crops. Protected cropping includes low-tech polytunnels utilizing protective coverings, medium-tech facilities with some environmental control, and high-tech facilities such as fully automated glasshouses and indoor vertical farms. High crop productivity and quality are maintained by using environmental control systems and advanced precision phenotyping sensor technologies that were first developed for broadacre agricultural and can now be utilized for protected-cropping applications. This paper reviews the state of the global protected-cropping industry and current precision phenotyping methodology and technology that is used or can be used to advance crop productivity and quality in a protected growth environment. This review assesses various sensor technologies that can monitor and maintain microclimate parameters, as well as be used to assess plant productivity and produce quality. The adoption of precision phenotyping technologies is required for sustaining future food security and enhancing nutritional quality.
Publisher: American Chemical Society (ACS)
Date: 04-04-2022
Abstract: Indium nitride (InN) has been of significant interest for creating and studying two-dimensional electron gases (2DEG). Herein we demonstrate the formation of 2DEGs in ultrathin doped and undoped 2D InN nanosheets featuring high carrier mobilities at room temperature. The synthesis is carried out via a two-step liquid metal-based printing method followed by a microwave plasma-enhanced nitridation reaction. Ultrathin InN nanosheets with a thickness of ∼2 ± 0.2 nm were isolated over large areas with lateral dimensions exceeding centimeter scale. Room temperature Hall effect measurements reveal carrier mobilities of ∼216 and ∼148 cm
Publisher: American Chemical Society (ACS)
Date: 03-2022
Publisher: American Chemical Society (ACS)
Date: 17-10-2019
Abstract: Excitation wavelength-dependent photoluminescence (PL) in two-dimensional (2D) transition-metal chalcogenides enables a strong excitonic interaction for high-performance chemical and biological sensing applications. In this work, we explore the possible candidates in the domain of post-transition-metal chalcogenides. Few-layered 2D p-type tin monosulfide (SnS) nanoflakes with submicrometer lateral dimensions are synthesized from the liquid phase exfoliation of bulk crystals. Excitation wavelength-dependent PL is found, and the excitonic radiative lifetime is more than one order enhanced compared to that of the bulk counterpart because of the quantum confinement effect. Paramagnetic NO
Publisher: Springer Science and Business Media LLC
Date: 06-09-2018
DOI: 10.1038/S41467-018-06124-1
Abstract: Two-dimensional piezotronics will benefit from the emergence of new crystals featuring high piezoelectric coefficients. Gallium phosphate (GaPO 4 ) is an archetypal piezoelectric material, which does not naturally crystallise in a stratified structure and hence cannot be exfoliated using conventional methods. Here, we report a low-temperature liquid metal-based two-dimensional printing and synthesis strategy to achieve this goal. We exfoliate and surface print the interfacial oxide layer of liquid gallium, followed by a vapour phase reaction. The method offers access to large-area, wide bandgap two-dimensional (2D) GaPO 4 nanosheets of unit cell thickness, while featuring lateral dimensions reaching centimetres. The unit cell thick nanosheets present a large effective out-of-plane piezoelectric coefficient of 7.5 ± 0.8 pm V − 1 . The developed printing process is also suitable for the synthesis of free standing GaPO 4 nanosheets. The low temperature synthesis method is compatible with a variety of electronic device fabrication procedures, providing a route for the development of future 2D piezoelectric materials.
Publisher: Research Square Platform LLC
Date: 15-07-2021
DOI: 10.21203/RS.3.RS-691931/V1
Abstract: Hydrogen gas (H 2 ) produced by water splitting using renewable energy, namely green hydrogen, is the most promising energy carrier of the low-carbon economy 1–6 . However, the geographic mismatch between renewables distribution and freshwater availability poses a significant challenge to green hydrogen production 7–9 . Here, we demonstrate a method of directly producing H 2 from the air, namely, capturing freshwater from the atmosphere using hygroscopic electrolyte and converting it to H 2 by electrolysis powered by solar energy. A prototype H 2 generator has been successfully established and operated for 12 consecutive days with a stable performance at an average Faradaic efficiency around 95%. This so-called direct air electrolysis (DAE) module can work under low relative humidity (20%) environment, overcoming water supply issues and producing green hydrogen sustainably with minimal impact to the environment. The DAE modules can be easily scaled to provide H 2 to remote, arid/semi-arid, and scattered areas.
Publisher: Springer Science and Business Media LLC
Date: 06-09-2022
DOI: 10.1038/S41467-022-32652-Y
Abstract: Green hydrogen produced by water splitting using renewable energy is the most promising energy carrier of the low-carbon economy. However, the geographic mismatch between renewables distribution and freshwater availability poses a significant challenge to its production. Here, we demonstrate a method of direct hydrogen production from the air, namely, in situ capture of freshwater from the atmosphere using hygroscopic electrolyte and electrolysis powered by solar or wind with a current density up to 574 mA cm −2 . A prototype of such has been established and operated for 12 consecutive days with a stable performance at a Faradaic efficiency around 95%. This so-called direct air electrolysis (DAE) module can work under a bone-dry environment with a relative humidity of 4%, overcoming water supply issues and producing green hydrogen sustainably with minimal impact to the environment. The DAE modules can be easily scaled to provide hydrogen to remote, (semi-) arid, and scattered areas.
Publisher: MDPI AG
Date: 16-05-2018
DOI: 10.3390/LAND7020064
Start Date: 2024
End Date: 12-2026
Amount: $423,067.00
Funder: Australian Research Council
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