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The revealing of the phenomenon of superhydrophobicity (the "lotus-effect") has stimulated an interest in wetting of real (rough and chemically heterogeneous) surfaces. In spite of the fact that wetting has been exposed to intensive research for more than 200 years, there still is a broad field open for theoretical and experimental research, including recently revealed superhydrophobic, superoleophobic and superhydrophilic surfaces, so-called liquid marbles, wetting transitions, etc. This book integrates all these aspects within a general framework of wetting of real surfaces, where physical and chemical heterogeneity is essential.Wetting of rough/heterogeneous surfaces is discussed through the use of the variational approach developed recently by the author. It allows natural and elegant grounding of main equations describing wetting of solid surfaces, i.e. Young, Wenzel and Cassie-Baxter equations. The problems of superhydrophobicity, wetting transitions and contact angle hysteresis are discussed in much detail, in view of novel models and new experimental data.

Wetting. --- Surface tension. --- Capillarity. --- Surfaces (Technology) --- Materials --- Surface phenomena --- Friction --- Surfaces (Physics) --- Tribology --- Matter --- Physics --- Permeability --- Surface chemistry --- Surface tension --- Capillarity --- Liquids --- Surface energy --- Wetting --- Surfaces --- Properties --- Mouillage (chimie des surfaces) --- Tension superficielle. --- Capillarité. --- Surfaces (technologie) --- Hysteresis --- Solid-liquid interfaces --- Liquid-solid interfaces --- Interfaces (Physical sciences) --- Elasticity --- Magnetic induction --- Solid-liquid interfaces. --- Hysteresis. --- Cassie Wetting. --- Contact Angle Hysteresis. --- Electrowetting. --- Non Stick Droplets. --- Superhydrophobicity. --- Surface Tension. --- Surface Wetting. --- Wenzel Wetting. --- Wetting Dynamics. --- Wetting Transitions.

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An outstanding compilation that reflects the state-of-the art on Dielectrophoresis (DEP) in 2020. Contributions include: - A novel mathematical framework to analyze particle dynamics inside a circular arc microchannel using computational modeling. - A fundamental study of the passive focusing of particles in ratchet microchannels using direct-current DEP. - A novel molecular version of the Clausius-Mossotti factor that bridges the gap between theory and experiments in DEP of proteins. - The use of titanium electrodes to rapidly enrich T. brucei parasites towards a diagnostic assay. - Leveraging induced-charge electrophoresis (ICEP) to control the direction and speed of Janus particles. - An integrated device for the isolation, retrieval, and off-chip recovery of single cells. - Feasibility of using well-established CMOS processes to fabricate DEP devices. - The use of an exponential function to drive electrowetting displays to reduce flicker and improve the static display performance. - A novel waveform to drive electrophoretic displays with improved display quality and reduced flicker intensity. - Review of how combining electrode structures, single or multiple field magnitudes and/or frequencies, as well as variations in the media suspending the particles can improve the sensitivity of DEP-based particle separations. - Improvement of dielectrophoretic particle chromatography (DPC) of latex particles by exploiting differences in both their DEP mobility and their crossover frequencies.

Technology: general issues --- History of engineering & technology --- dielectrophoresis (DEP) --- microparticles --- polystyrene --- chromatography --- interdigitated electrodes --- microfluidic --- separation --- electrowetting display --- driving waveform --- aperture ratio --- exponential function --- time constant --- single-cell microfluidics --- single-cell recovery --- single-cell array --- hydrodynamic trapping --- electrokinetics --- tridimensional electrodes --- mRNA sequencing --- Drop-seq --- induced charge electrophoresis (ICEP) --- Janus particles --- optical trapping --- phase-sensitive detection --- phoretic force spectroscopy --- ICEP motility reversal --- micro-robotics --- dielectrophoresis --- microfluidics --- cell separation --- electrokinetic --- particle focusing --- electrophoretic display --- particle activation --- response speed --- reference grayscale --- cell immobilization --- lab-on-a-chip --- Clausius–Mossotti function --- dielectric spectroscopy --- interfacial polarization --- proteins --- sleeping sickness --- Human African trypanosomiasis --- trypanosoma --- titanium --- curvature-induced --- n/a --- Clausius-Mossotti function

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Optofluidic devices are of high scientific and industrial interest in chemistry, biology, material science, pharmacy, and medicine. In recent years, they have experienced strong development because of impressive achievements in the synergistic combination of photonics and micro/nanofluidics. Sensing and/or lasing platforms showing unprecedented sensitivities in extremely small analyte volumes, and allowing real-time analysis within a lab-on-a-chip approach, have been developed. They are based on the interaction of fluids with evanescent waves induced at the surface of metallic or photonic structures, on the implementation of microcavities to induce optical resonances in the fluid medium, or on other interactions of the microfluidic systems with light. In this context, a large variety of optofluidic devices has emerged, covering topics such as cell manipulation, microfabrication, water purification, energy production, catalytic reactions, microparticle sorting, micro-imaging, or bio-sensing. Moreover, the integration of these optofluidic devices in larger electro-optic platforms represents a highly valuable improvement towards advanced applications, such as those based on surface plasmon resonances that are already on the market. In this Special Issue, we invited the scientific community working in this rapidly evolving field to publish recent research and/or review papers on these optofluidic devices and their applications.

History of engineering & technology --- opto-fluidics --- micro-manipulation --- cells --- microparticles --- electrowetting display --- aperture ratio --- driving waveform --- hysteresis characteristic --- ink distribution --- response speed --- optofluidics --- ocean monitoring --- colorimetric method --- optoelectrokinetics --- optically-induced dielectrophoresis --- micro/nanomaterials --- separation --- fabrication --- electro-fluidic display --- organic dye --- colored oil --- photo-stability --- micro-thermometry --- laser induced fluorescence --- droplet microfluidics --- zinc oxide --- rhodamine B --- rhodamine 6G --- photocatalysis --- microreactor --- photocatalytic water purification --- paper --- 3D hydrodynamic focusing --- optofluidic --- lab-on-a-chip --- biosensor --- microscale channel --- microfluidic --- liquid-core waveguide --- single layer --- reservoir effect --- sensor --- surface plasmon resonance --- nanohole array --- mechanical properties --- nanofluidic --- nanoplasmonic --- dissolved oxygen --- silver nanoprisms --- colorimetry --- n/a

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Optofluidic devices are of high scientific and industrial interest in chemistry, biology, material science, pharmacy, and medicine. In recent years, they have experienced strong development because of impressive achievements in the synergistic combination of photonics and micro/nanofluidics. Sensing and/or lasing platforms showing unprecedented sensitivities in extremely small analyte volumes, and allowing real-time analysis within a lab-on-a-chip approach, have been developed. They are based on the interaction of fluids with evanescent waves induced at the surface of metallic or photonic structures, on the implementation of microcavities to induce optical resonances in the fluid medium, or on other interactions of the microfluidic systems with light. In this context, a large variety of optofluidic devices has emerged, covering topics such as cell manipulation, microfabrication, water purification, energy production, catalytic reactions, microparticle sorting, micro-imaging, or bio-sensing. Moreover, the integration of these optofluidic devices in larger electro-optic platforms represents a highly valuable improvement towards advanced applications, such as those based on surface plasmon resonances that are already on the market. In this Special Issue, we invited the scientific community working in this rapidly evolving field to publish recent research and/or review papers on these optofluidic devices and their applications.

opto-fluidics --- micro-manipulation --- cells --- microparticles --- electrowetting display --- aperture ratio --- driving waveform --- hysteresis characteristic --- ink distribution --- response speed --- optofluidics --- ocean monitoring --- colorimetric method --- optoelectrokinetics --- optically-induced dielectrophoresis --- micro/nanomaterials --- separation --- fabrication --- electro-fluidic display --- organic dye --- colored oil --- photo-stability --- micro-thermometry --- laser induced fluorescence --- droplet microfluidics --- zinc oxide --- rhodamine B --- rhodamine 6G --- photocatalysis --- microreactor --- photocatalytic water purification --- paper --- 3D hydrodynamic focusing --- optofluidic --- lab-on-a-chip --- biosensor --- microscale channel --- microfluidic --- liquid-core waveguide --- single layer --- reservoir effect --- sensor --- surface plasmon resonance --- nanohole array --- mechanical properties --- nanofluidic --- nanoplasmonic --- dissolved oxygen --- silver nanoprisms --- colorimetry --- n/a

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During the last decade, novel graphene related materials (GRMs), perovskites, as well as metal oxides and other metal nanostructures have received the interest of the scientific community. Due to their extraordinary physical, optical, thermal, and electrical properties, which are correlated with their 2D ultrathin atomic layer structure, large interlayer distance, ease of functionalization, and bandgap tunability, these nanomaterials have been applied in the development or the improvement of innovative optoelectronic applications, as well as the expansion of theoretical studies and simulations in the fast-growing fields of energy (photovoltaics, energy storage, fuel cells, hydrogen storage, catalysis, etc.), electronics, photonics, spintronics, and sensing devices. The continuous nanostructure-based applications development has provided the ability to significantly improve existing products and to explore the design of materials and devices with novel functionalities. This book demonstrates some of the most recent trends and advances in the interdisciplinary field of optoelectronics. Most articles focus on light emitting diodes (LEDs) and solar cells (SCs), including organic, inorganic, and hybrid configurations, whereas the rest address photodetectors, transistors, and other well-known dynamic optoelectronic devices. In this context, this exceptional collection of articles is directed at a broad scientific audience of chemists, materials scientists, physicists, and engineers, with the goals of highlighting the potential of innovative optoelectronic applications incorporating nanostructures and inspiring their realization.

graphene oxide --- textured silicon solar cells --- n/a --- high-efficiency --- CdTe microdots --- piezo-phototronic effect --- electromagnetically induced transparency effect --- waveguide photons --- light output power --- hole injection --- ternary organic solar cells --- UV LEDs --- cathodoluminescence --- V-pits --- quantum confinement effect --- nano-grating --- metamaterials --- Ga2O3 --- tunneling --- transmittance --- graphene ink --- perovskite solar cells --- counter electrode --- nucleation layer --- Ag film --- AlGaN-based ultraviolet light-emitting diode --- color-conversion efficiency --- PeLEDs --- photoelectric performance --- photocurrent --- charge transfer --- double-layer ITO --- green LED --- liquid crystals --- photovoltaics --- electrowetting --- oxidation --- Fowler–Nordheim --- field emission --- excitation wavelength --- functionalization --- quantum dots --- gold split-ring --- cascade effect --- erbium --- transparent conductive electrode --- compact --- plasmon resonance --- air-processed --- FDTD --- prism-structured sidewall --- sheet resistance --- GaN --- Ti porous film --- stability --- flip-chip mini-LED --- flexible substrate --- actively tunable nanodevices --- green LEDs --- metasurfaces --- antireflective coating (ARC) --- NiCo2S4 nanotubes --- InN/p-GaN heterojunction --- InGaN/GaN superlattice --- OAB --- graded indium composition --- plasmonics --- polymer composites --- photomultiplication --- cold cathode --- solvent --- solar cells --- controllable synthesis --- tunable absorbers --- interface --- graphene --- silicon transistor --- colorimetry --- light extraction --- reduced graphene oxide --- pinhole pattern --- indium nanoparticles (In NPs) --- graphene split-ring --- organic solar cell --- light-emitting diode --- organic --- plasmonic forward scattering --- smooth --- subwavelength metal grating --- perovskite --- photoluminescence --- mid infrared --- polarization analyzer --- transparent electrode --- external quantum efficiency --- LED --- light-emitting diodes --- photodetector --- p-type InGaN --- quantum efficiency --- 2D perovskite --- quantum dot --- orthogonal polarization --- current spreading --- localized surface plasmon --- Schottky barrier --- Fowler-Nordheim