In chemistry, hydrophobicity is the physical property of a molecule that is seemingly repelled from a mass of water. In contrast, hydrophiles are attracted to water.
A dilatant material is one in which viscosity increases with the rate of shear strain. Such a shear thickening fluid, also known by the initialism STF, is an example of a non-Newtonian fluid. This behaviour is usually not observed in pure materials, but can occur in suspensions.
In chemistry and materials science, ultrahydrophobic surfaces are highly hydrophobic, i.e., extremely difficult to wet. The contact angles of a water droplet on an ultrahydrophobic material exceed 150°. This is also referred to as the lotus effect, after the superhydrophobic leaves of the lotus plant. A droplet striking these kinds of surfaces can fully rebound like an elastic ball. Interactions of bouncing drops can be further reduced using special superhydrophobic surfaces that promote symmetry breaking, pancake bouncing or waterbowl bouncing.
A liquid is a nearly incompressible fluid that conforms to the shape of its container but retains a nearly constant volume independent of pressure. It is one of the four fundamental states of matter, and is the only state with a definite volume but no fixed shape.
Hydrophobic silica is a form of silicon dioxide that has hydrophobic groups chemically bonded to the surface. The hydrophobic groups are normally alkyl or polydimethylsiloxane chains. Hydrophobic silica can be processed in different ways; such as fumed silica, precipitated silica, and aerosol assisted self assembly, all existing in the form of nanoparticles.
The School of Chemistry, University of Sydney is a school of the Faculty of Science at the University of Sydney.
A superhydrophobic coating is a thin surface layer that repels water. It is made from superhydrophobic (ultrahydrophobicity) materials. Droplets hitting this kind of coating can fully rebound. Generally speaking, superhydrophobic coatings are made from composite materials where one component provides the roughness and the other provides low surface energy.
Nanoparticles are classified as having at least one of three dimensions be in the range of 1-100 nm. The small size of nanoparticles allows them to have unique characteristics which may not be possible on the macro-scale. Self-assembly is the spontaneous organization of smaller subunits to form larger, well-organized patterns. For nanoparticles, this spontaneous assembly is a consequence of interactions between the particles aimed at achieving a thermodynamic equilibrium and reducing the system’s free energy. The thermodynamics definition of self-assembly was introduced by Nicholas A. Kotov. He describes self-assembly as a process where components of the system acquire non-random spatial distribution with respect to each other and the boundaries of the system. This definition allows one to account for mass and energy fluxes taking place in the self-assembly processes.
Irshad Hussain is a Pakistani Scientist in the field of chemistry and among the few pioneers to initiate nanomaterials research in Pakistan.
Polyurethane Dispersion, or PUD, is understood to be a polyurethane polymer resin dispersed in water, rather than a solvent, although some cosolvent maybe used. Its manufacture involves the synthesis of polyurethanes having carboxylic acid functionality or nonionic hydrophiles like PEG incorporated into, or pendant from, the polymer backbone. Two component polyurethane dispersions are also available.
Catherine Stampfl is a Professor of Physics at the University of Sydney and was elected as a Fellow of the Australian Academy of Science in 2019.
Deanna Michelle D'Alessandro is an Australian chemist who is a Professor and Australian Research Council Future Fellow at the University of Sydney. Her research considers fundamental aspects of electron transfer in molecular coordination complexes and in nanoporous materials, and the development of metal–organic frameworks for environmental applications including carbon dioxide capture and conversion.
Stephanie Lee Brock is an American chemist who is professor of inorganic chemistry at Wayne State University. Her research considers metal pnictides and chalcogenide nanomaterials. She is a Fellow of the American Association for the Advancement of Science and the American Chemical Society.
Stefan A. F. Bon is a Professor of Chemical Engineering in the department of Chemistry at the University of Warwick, United Kingdom. His research considers polymer-based colloids. He is a Fellow of the International Union of Pure and Applied Chemistry, an elected member of the International Polymer Colloids Group (IPCG), and member of the physical Newton international fellowship committee, and served as the Royal Society of Chemistry Outreach Lecturer in 2015-2016.
Sarah Helen Tolbert is an American chemist who is a professor in the department of chemistry and biochemistry at the University of California, Los Angeles. Her research considers self-assembled nanomaterials, which includes inorganic phases and colloidal materials.
Maria Antonietta Loi is an Italian physicist who is a Professor of Optoelectronics at the University of Groningen and member of the Zernike Institute for Advanced Materials. Her research considers the development of functional materials for low-cost, high efficiency optoelectronic device. She was awarded the 2018 Netherlands Physical Society Physics prize (Physicaprijs). In 2020, she was elected Fellow of the American Physical Society. In 2022 she became a fellow of the Dutch academy of science (KNAW) and of the European academy of Science. Loi is Deputy Editor-in-chief of Applied Physics Letters.
Shu Yang is a Chinese-American materials scientist who is the Joseph Bordogna Professor of Engineering and Applied Science and Chair of the Department of Materials Science and Engineering at the University of Pennsylvania. She is a Fellow of the Royal Society of Chemistry, American Physical Society, National Academy of Inventors and Materials Research Society.
Lynn Walker is a professor of chemical engineering at Carnegie Mellon University. Her research considers the rheology of complex fluids and how nanostructure impacts the behavior of complex systems. She is a Fellow of the American Institute of Chemical Engineers, the Society of Rheology, and the American Physical Society.
Emmie Helena Lucassen-Reynders was a Dutch scientist specialising in colloid chemistry and theoretical physics. She worked in both academia and in industry.
Elena P. Ivanova is a nanobiotechnologist/biophysicist, academic, and author. She is a Distinguished Professor at RMIT University, Australia. She is most known for her research on biomaterials and bioengineering, focusing on biomimetics antimicrobial nanostructured surfaces.
