The role of low-energy excited states in solar-energy capture. This project aims to determine the nature and role of the lowest-energy excited states in most natural photosynthetic reaction centres and light-harvesting complexes. The lowest-energy states of bacterial reaction centres are critical to function and are used as a paradigm in artificial organic solar-energy capture, but for most photosystems their nature remains unknown. The project aims to answer the critical question of why they do ....The role of low-energy excited states in solar-energy capture. This project aims to determine the nature and role of the lowest-energy excited states in most natural photosynthetic reaction centres and light-harvesting complexes. The lowest-energy states of bacterial reaction centres are critical to function and are used as a paradigm in artificial organic solar-energy capture, but for most photosystems their nature remains unknown. The project aims to answer the critical question of why they do not actually prevent function. It is expected that both the outcomes obtained and techniques developed will be directly relevant to solar-energy device design. The project will apply five existing, complimentary and purposely built spectrometers as well as quantum electronic and nuclear simulation techniques to identify and characterise three key systems.Read moreRead less
Understanding, prediction and control of polymorphism in pharmaceuticals. The proposed research will lead, through a better understanding of polymorphism, to more efficient production of pharmaceuticals and will enhance the establishment and protection of patents. The work will have flow-on in other areas such as the manufacture of pigments, dyes and explosives. The project uses methodology for the elucidation of local structure and function at the atomic to nanoscale level in which Australia is ....Understanding, prediction and control of polymorphism in pharmaceuticals. The proposed research will lead, through a better understanding of polymorphism, to more efficient production of pharmaceuticals and will enhance the establishment and protection of patents. The work will have flow-on in other areas such as the manufacture of pigments, dyes and explosives. The project uses methodology for the elucidation of local structure and function at the atomic to nanoscale level in which Australia is a world leader. The project will further enhance our standing in this field and will provide excellent research training opportunities in areas particularly pertinent to future exploitation of the Australian Synchrotron and the new Research Reactor OPAL, which open in 2007. Read moreRead less
Friction and capillary forces. Reducing friction forces is important for improving the performance of moving components in devices, and also useful for relieving people from pains at joints. In ambient conditions, confined liquids have a great influence on friction forces because an attractive force is induced by capillary condensation and adsorption between the surfaces. The correlation between capillary and friction forces will be clarified by force measurements with newly developed surface fo ....Friction and capillary forces. Reducing friction forces is important for improving the performance of moving components in devices, and also useful for relieving people from pains at joints. In ambient conditions, confined liquids have a great influence on friction forces because an attractive force is induced by capillary condensation and adsorption between the surfaces. The correlation between capillary and friction forces will be clarified by force measurements with newly developed surface force apparatuses in various conditions. Theoretical interpretation of influences of molecular layered liquids between the sliding surfaces on frictional behaviour will be also given based on thermodynamics.Read moreRead less
Salt, Bubbles and Life; A study of ion specificity in colloid science. A colloidal solution is a liquid that contains a finely dispersed material. The properties of these solutions are critical in many industrially important practices and in the everyday processes of life. Though not understood, it is observed that the type of salt in solution controls how the colloid behaves. Through a series of very careful experiments we seek to learn precisely how different salts influence the properties of ....Salt, Bubbles and Life; A study of ion specificity in colloid science. A colloidal solution is a liquid that contains a finely dispersed material. The properties of these solutions are critical in many industrially important practices and in the everyday processes of life. Though not understood, it is observed that the type of salt in solution controls how the colloid behaves. Through a series of very careful experiments we seek to learn precisely how different salts influence the properties of a colloidal solution. This world-leading research will enable us to improve our fundamental understanding of colloids and thereby facilitate advances in topics as diverse as enzymatic action and minerals purification, ensuring Australia remains at the forefront of science in this field.Read moreRead less
The effect of de-gassing on the dispersion and stability of emulsions and colloidal solutions. Although it is widely accepted that oil and water will not mix, the reverse has recently been found to occur (by the applicant) under the unusual conditions of complete de-gassing. This discovery has opened up new areas for investigation and for the development of new processes and products. Hydrocarbon oils and hydrophobic powders can now be readily dispersed in water without the use of additives. Ho ....The effect of de-gassing on the dispersion and stability of emulsions and colloidal solutions. Although it is widely accepted that oil and water will not mix, the reverse has recently been found to occur (by the applicant) under the unusual conditions of complete de-gassing. This discovery has opened up new areas for investigation and for the development of new processes and products. Hydrocarbon oils and hydrophobic powders can now be readily dispersed in water without the use of additives. However, the mechanisms involved have not yet been elucidated and it is the aim of this project to understand the process and develop potential commercial applications.Read moreRead less
Signature of vibrational motions encoded into small polyatomic spectra. Using revolutionary state-of-the-art spectrometers, the project plans to search for signatures of large-amplitude vibrational motions that transform one chemical species to another. Bond-breaking chemical reactions necessarily involve highly vibrationally excited reactants and/or products that move the energy of the system away from equilibrium. It is now possible for direct measurements to be made of the changes that a mole ....Signature of vibrational motions encoded into small polyatomic spectra. Using revolutionary state-of-the-art spectrometers, the project plans to search for signatures of large-amplitude vibrational motions that transform one chemical species to another. Bond-breaking chemical reactions necessarily involve highly vibrationally excited reactants and/or products that move the energy of the system away from equilibrium. It is now possible for direct measurements to be made of the changes that a molecule undergoes as it transits across a chemical potential energy barrier. The project plans to examine the long-standing problem of vinylidene-acetylene isomerisation in order to verify the long-suspected existence of large amplitude vibrational motion in small molecules, which are thought to be the signatures of a particular class of chemical dynamics. These would provide a rational basis for future control of unimolecular chemical reactions.Read moreRead less
Bioinspired tuneable catalysts for renewable ammonia production. The project will design a new solar-powered system for electrosynthesis of ammonia to replace the current energy intensive, non-sustainable process that generates 1.5% of global CO2 emissions. An innovative new system will be developed by combining cutting edge electrochemical, spectroscopic and theoretical methods. Expected key outcomes include novel concepts in the design of advanced materials, and an efficient process for the gr ....Bioinspired tuneable catalysts for renewable ammonia production. The project will design a new solar-powered system for electrosynthesis of ammonia to replace the current energy intensive, non-sustainable process that generates 1.5% of global CO2 emissions. An innovative new system will be developed by combining cutting edge electrochemical, spectroscopic and theoretical methods. Expected key outcomes include novel concepts in the design of advanced materials, and an efficient process for the green ammonia synthesis. Given the strategic importance of ammonia as a future energy carrier for the export of Australian renewables and as a major source of fertilisers, this project should provide significant national economic and ecological benefits and is expected to have a broad reaching global impact.Read moreRead less
Surface adsorption, repulsion and attraction: A new experimental approach to surface forces. The ability to understand and manipulate the stability of finely dispersed particles (colloids) in water is essential to modern living. It is necessary in processes as diverse as water purification, minerals separation, food and paper production. The behaviour of the colloidal system can often be understood in terms of the interaction between the dispersed particles. This project aims to improve our abil ....Surface adsorption, repulsion and attraction: A new experimental approach to surface forces. The ability to understand and manipulate the stability of finely dispersed particles (colloids) in water is essential to modern living. It is necessary in processes as diverse as water purification, minerals separation, food and paper production. The behaviour of the colloidal system can often be understood in terms of the interaction between the dispersed particles. This project aims to improve our ability to predict the nature of the interaction between dispersed particles, through an understanding of the events at a particle surface during a collision with another particle. This will enable us to better understand and control real colloidal systems.Read moreRead less
Ionic Dispersion Forces in Physical Chemistry: Implications for pH, Electrochemistry, Nanoparticle Formation and Organic Synthesis. Our current understanding of charged systems in solution is deeply flawed . Existing theories are not predictive, mainly because they concentrate entirely on electrostatics. This proposal aims to partially rectify this by including the effects of previously neglected dispersion forces in a number of problems. These forces are responsible for much of the behaviou ....Ionic Dispersion Forces in Physical Chemistry: Implications for pH, Electrochemistry, Nanoparticle Formation and Organic Synthesis. Our current understanding of charged systems in solution is deeply flawed . Existing theories are not predictive, mainly because they concentrate entirely on electrostatics. This proposal aims to partially rectify this by including the effects of previously neglected dispersion forces in a number of problems. These forces are responsible for much of the behaviour seen in the following systems: the theory of electrolytes; electrochemistry pH and buffers; self energy effects in organic chemistry; and zeolite and nano-particle synthesis. The main outcome will be accurate and predictive theories for these systems.Read moreRead less
Sulfuric acid formation from atmospheric sulfur trioxide and disulfur oxide: is one water molecule enough? Sulfate aerosols significantly affect the amount of solar radiation reaching the Earth, influencing the nett energy balance, and mitigating the greenhouse effect. A major source of these aerosols is sulfuric acid. Understanding the sources and formation rates of sulfuric acid production is of considerable importance for global climate models. This project will provide significant insight in ....Sulfuric acid formation from atmospheric sulfur trioxide and disulfur oxide: is one water molecule enough? Sulfate aerosols significantly affect the amount of solar radiation reaching the Earth, influencing the nett energy balance, and mitigating the greenhouse effect. A major source of these aerosols is sulfuric acid. Understanding the sources and formation rates of sulfuric acid production is of considerable importance for global climate models. This project will provide significant insight into the sulfur oxides and their water clusters, relevant to sulfuric acid formation, providing data applicable to the modelling of planetary atmospheres, especially timely for the Venus Express mission, and more importantly, the building of comprehensive climate models.Read moreRead less