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Liquid metal alloys are of rapidly increasing interest in electronics because they combine the high electrical conductivity of metals with the ease of manipulation and reconfiguration of liquids. The book focuses on such issues as self-assembled monolayers, energy-harvesting, reconfigurable and flexible antennae, sensors, conformable electronics, the creation of non-wetting super-hydrophobic or super-lyophobic surfaces, vacuum-assisted infiltration techniques, development of microfluidics, deformable electrodes and wearable electronics. The book references 270 original resources and includes their direct web link for in-depth reading. Keywords: Liquid Metals, Gallium-Indium Alloys, Galinstan, EGaIn, Self-Assembled Monolayers, Energy-Harvesting, Reconfigurable Antennae, Sensors, Conformable Electrodes, Stretchable Wires and Interconnects, Self-Healing Circuits, Gallium-Lyophilic Surfaces, Wettability of Liquid Metal, Substrate Topology, Selective Wetting Deposition Technique, Gallium-Indium Droplets on Thin Metal Films, Substrate Texture upon Wetting, Dielectrophoresis, Microfluidics, Deformable Electrodes, Wearable Electronics, Flexible Antennae, Surface Oxidation of Alloys.
An up-to-date exploration of the properties and most recent applications of liquid metals In Liquid Metal: Properties, Mechanisms, and Applications, a pair of distinguished researchers delivers a comprehensive exploration of liquid metals with a strong focus on their structure and physicochemical properties, preparation methods, and tuning strategies. The book also illustrates the applications of liquid metals in fields as varied as mediated synthesis, 3D printing, flexible electronics, biomedicine, energy storage, and energy conversion. The authors include coverage of reactive mediums for synthesizing and assembling nanomaterials and direct-writing electronics, and the book offers access to supplementary video materials to highlight the concepts discussed within. Recent advancements in the field of liquid metals are also discussed, as are new opportunities for research and development in this rapidly developing area. The book also includes: A thorough introduction to the fundamentals of liquid metal, including a history of its discovery, its structure and physical properties, and its preparation Comprehensive explorations of the external field tuning of liquid metal, including electrical, magnetic, and chemical tuning Practical discussions of liquid metal as a new reaction medium, including nanomaterial synthesis and alloy preparation In-depth examinations of constructing techniques of liquid metal-based architectures, including injection, imprinting, and mask-assisted depositing Perfect for materials scientists, electrochemists, and catalytic chemists, Liquid Metal: Properties, Mechanisms, and Applications also belongs in the libraries of inorganic chemists, electronics engineers, and biochemists.
This book provides the first comprehensive critical survey of the microstructural characteristics of liquid metals which determine properties of viscosity, surface tension, density, heat capacity, thermal conductivity, electrical resistivity, diffusion, and velocity of sound transmission. The experimental techniques used to obtain these data are also reviewed. The result is a valuable set of correlations and reference data which enable the reader to understand the basic phenomena underlying the properties of liquid metals. As such, the book will be invaluable for metallurgists and materials engineers working in this area.
Phase diagrams are "maps" materials scientists often use to design new materials. They define what compounds and solutions are formed and their respective compositions and amounts when several elements are mixed together under a certain temperature and pressure. This monograph is the most comprehensive reference book on experimental methods for phase diagram determination. It covers a wide range of methods that have been used to determine phase diagrams of metals, ceramics, slags, and hydrides. * Extensive discussion on methodologies of experimental measurements and data assessments * Written by experts around the world, covering both traditional and combinatorial methodologies* A must-read for experimental measurements of phase diagrams
Gallium-based liquid metal alloys have garnered attention for their use in self-healing and flexible electronics, soft robotics, catalysis, and biomedicine. Advances in these next-generation materials have only been made possible through understanding the liquid-metal interfaces and the interactions of matter with these liquids. We propose that liquid metal chemistry of gallium and gallium-based alloys can be subdivided into a series of interfacial phenomenon. To study the interfacial properties of liquid metal, eutectic gallium indium (E-GaIn), a non-toxic liquid metal alloy comprised of ~75% gallium and ~25% indium, and has a melting temperature of 15.5 C, was employed for its liquid state at room temperature. With an overview of the breadth of chemistry involved within liquid metal systems, we first consider the oxidation of liquid metals in air. Room-temperature liquid metals, their interactions in air, and the kinetics of oxidation are critical first steps towards understanding the materials properties of liquid metals, such as surface-energy/surface-tension that originate at the metal-oxide interface. Once understood, this oxidation can be prevented via surface-bound ligands. We employed gallium-thiol chemistry and bi-functional thiol molecules as capping ligands for the surface stabilization of gallium-based liquid-metal nanostructures. These surface stabilization effects, within mixtures of liquid metal and polar solution, such as water and ethanol, are examined as a new type of emulsified system. These emulsified systems, with the help of surface-active molecules, can exist in both their singly and doubly emulsified forms. Like mercury and other liquid metals, E-GaIn has a high surface tension, which when broken can form ultra-small droplets, ~4 nm. These ultra-small liquid metal droplets were found to undergo higher order assemblies in the form of fractal aggregates under evaporation of the surrounding solvent. When examining the doubly emulsified form, these liquid metal droplets present a novel approach for the encapsulation of cargo. The material properties of E-GaIn present an interesting avenue for the study of nanocarriers. Eutectic gallium indium, which has low toxicity, enable considering this liquid metal for drug-delivery applications. Furthermore, where traditional nanoparticle carriers typically have cargo decorated on the surface, or within pores and imperfections; liquid-metal double emulsions, which have a non-metallic phase embedded within the core of the liquid metal droplets, allow for cargo loading much larger than the surface of the nanostructure. Lastly, competition for interfaces and the role of self-assembly at metallic interfaces presents a scaffold for the post-encapsulation functionalization of liquid metal carriers. The 'skin' of liquid E-GaIn, whether comprised of metal oxide, metal thiolate, or pristine surface can act as a barrier for reaction kinetics, such as in the case of surface oxidation and the prevention of it with thiol/thiolate assemblies at the liquid metal interface, or a regenerative reactive interface, as in the case of surface-initiated galvanic reduction. Galvanic reduction with gallium, as the name implies, can act as a free-electron surface for the reduction of simple metal salts. Similar to hanging mercury drop experiments, liquid metals provide a pristine, self-regenerating, liquid metal surface. We explore the galvanic reduction of silver salts on nanoscopic liquid metal seeds via solution-liquid-solid-growth of silver nanovines. We found these arboriform liquid metal structures were grown as diffusion-limited aggregates and we were able to impart control on both the growth front thickness and aspect ratio. The manipulation of liquid metals with surface-active molecules will have applications in next-generation devices and soft robotics. By incorporating liquid metal as the conductive contacts, we enable malleable devices. Liquid metals enable new applications of traditional conductive materials with certain advantages. We envision robots, sensors, and a variety of future prospects where liquid metal can open new doors to a variety of applications. In an effort to explore these devices, we have shown that E GaIn is an ideal contact material for an ultra-thin indium oxide based field-effect transistor (FET). These liquid-metal-enabled devices provide lower barriers to charge transfer, yielding lower power devices as compared to gold. Liquid-metal-enabled emulsions, materials, and devices present new chapters in inorganic chemistry, materials chemistry, engineering, nanoscience, and medicine. By looking at the interfacial phenomenon that dictates the interactions of liquid metal with the environment, we explore these avenues of control and application. With the rise in availability for three-dimensional (3-D) printers, liquid metal and hybrid materials comprised of liquid-metal-based emulsions are a new frontier. The field of liquid-metal-enabled materials remains relatively unexplored.
Artificial organs may be considered as small-scale process plants, in which heat, mass and momentum transfer operations and, possibly, chemical transformations are carried out. This book proposes a novel analysis of artificial organs based on the typical bottom-up approach used in process engineering. Starting from a description of the fundamental physico-chemical phenomena involved in the process, the whole system is rebuilt as an interconnected ensemble of elemental unit operations. Each artificial organ is presented with a short introduction provided by expert clinicians. Devices commonly used in clinical practice are reviewed and their performance is assessed and compared by using a mathematical model based approach. Whilst mathematical modelling is a fundamental tool for quantitative descriptions of clinical devices, models are kept simple to remain focused on the essential features of each process. Postgraduate students and researchers in the field of chemical and biomedical engineering will find that this book provides a novel and useful tool for the analysis of existing devices and, possibly, the design of new ones. This approach will also be useful for medical researchers who want to get a deeper insight into the basic working principles of artificial organs.