All articles starting with M
36,687 articles
Metal-organic framework nanosheets
Metal-organic framework nanosheets, also called 2D MOF nanosheets or MONs, are ultrathin two-dimensional sheets combining MOF porosity with large surface area for gas separation, catalysis, and sensing.
Metal-organic framework thermal energy storage
Metal-organic framework thermal energy storage stores and releases heat using MOFs, porous crystals that hold phase change materials in their pores or act as adsorbents in heat-storage cycles.
Metal-organic framework water harvesting
Metal-organic framework water harvesting is atmospheric water harvesting in which porous MOF crystals capture water vapor even in dry desert air, then release it when heated or exposed to sunlight.
Metal-organic framework-based direct air capture
Metal-organic framework-based direct air capture adsorbs carbon dioxide directly from ambient air, at roughly 400 ppm, using crystalline porous sorbents called metal-organic frameworks (MOFs) with tunable pores.
Metal-organic gels
Metal-organic gels (MOGs) are semi-solid materials where metal ions and organic ligands self-assemble into a 3D network that immobilizes solvent, used in catalysis, adsorption, and drug delivery.
Metal-organic layers
Metal-organic layers (MOLs), also called coordination nanosheets, are two-dimensional metal-organic frameworks: ultrathin nanosheets of a monolayer or a few layers, studied for catalysis, sensing, and drug delivery.
Metal-oxide photoresist
A metal-oxide photoresist (MOR) is an inorganic, metal-containing photosensitive film used to pattern integrated circuits in extreme ultraviolet (EUV) lithography; tin-oxide formulations are leading candidates for advanced chips.
Metal-poor star
A metal-poor star is a star whose atmosphere contains unusually small amounts of elements heavier than helium, serving as a record of the earliest star formation in the Universe.
Metal–air battery
A metal–air battery is an electrochemical cell that oxidizes a metal anode while drawing its cathode oxygen from the air, giving it some of the highest theoretical energy densities of any battery family.
Metal–ligand covalency effect in perovskite OER
Metal–ligand covalency effect in perovskite OER is the degree of B-site metal 3d to oxygen 2p orbital hybridization, an activity descriptor whose increase promotes lattice oxygen participation while degrading catalyst stability.
Metal–ligand multiple bond
A metal–ligand multiple bond is a transition metal–ligand bond with bond order greater than one, typically alkylidene, imido, or oxo bonds that catalyze reactions like olefin metathesis.
Metal–nitrogen–carbon catalysts
Metal–nitrogen–carbon (M–N–C) catalysts are single-atom catalysts in which dispersed metal atoms bind nitrogen sites in carbon, developed as low-cost platinum alternatives for fuel cells and CO2 reduction.
Metal–organic framework
A metal–organic framework (MOF) is a porous hybrid material of metal ions or clusters joined to organic linkers, used for gas storage, catalysis, and water harvesting.
Metal–organic framework composites
Metal–organic framework composites are materials combining a metal–organic framework with functional components such as nanoparticles, polymers, or carbon, yielding synergistic properties for adsorption, catalysis, energy storage, and sensing.
Metal–organic framework glasses
A metal-organic framework glass is an amorphous solid made by melting a crystalline MOF and cooling it fast enough to avoid recrystallization, first demonstrated with ZIF-4 in 2015.
Metal–organic framework hydrogen storage
Metal–organic framework hydrogen storage stores hydrogen by physisorption inside metal–organic frameworks, porous crystalline materials with tunable pores and exceptionally high surface areas studied intensively as adsorbents since 2003.
Metal–organic framework photocatalysis
Metal–organic framework photocatalysis uses crystalline porous frameworks of metal nodes joined by organic ligands to drive reactions under light, including hydrogen evolution, CO₂ reduction, organic synthesis, and pollutant degradation.
Metal–organic framework-derived electrocatalysts
Metal–organic framework-derived electrocatalysts are catalysts made by thermally or chemically converting a metal–organic framework template, which no longer survives, into conductive derivative phases like carbon frameworks and metal phosphides.
Metal–organic frameworks for acetylene storage
Metal–organic frameworks (MOFs) for acetylene storage are porous crystalline adsorbents, built from metal ions and organic linkers, that pack acetylene gas densely and safely at near-ambient temperature and pressure.
Metal–organic frameworks for CO2 capture
Metal–organic frameworks (MOFs) for CO2 capture are crystalline porous adsorbents of metal nodes and organic linkers whose tunable pores and high surface area selectively adsorb carbon dioxide from flue gas and air.
Metal–organic frameworks for gas separation
Metal–organic frameworks for gas separation are porous crystalline adsorbents and membranes built from metal ions and organic linkers, whose tunable pores sort gas mixtures selectively.
Metal–semiconductor contact
A metal–semiconductor junction is the interface formed where a metal contacts a semiconductor, forming a Schottky barrier or ohmic contact; Fermi-level pinning makes it central to transistor fabrication.
Metal–semiconductor–metal photodetector
A metal–semiconductor–metal (MSM) photodetector uses two interdigitated Schottky metal electrodes on a semiconductor, giving very low capacitance, high speed, and easy integration with transistor circuits.
Metalation
Metalation is a chemical reaction that replaces a hydrogen atom on carbon with a metal, most often lithium, magnesium, or zinc, giving organometallic reagents used in synthesis.
Metalaxyl m
Metalaxyl-M (mefenoxam) is the R-enantiomer of metalaxyl, a phenylamide FRAC Code 4 fungicide inhibiting RNA polymerase I in oomycetes; EU-approved 2020-2035 for seed treatment.
Metalcore
Metalcore: fusion genre of heavy metal and hardcore punk, rooted in 1980s US crossover hardcore, defined by breakdowns and screamed vocals; melodic second wave (Killswitch Engage, As I Lay Dying) and modern electronic strands distinguish it.
Metaldehyde
Metaldehyde is a cyclic tetramer of acetaldehyde, a white crystalline solid with the formula C₈H₁₆O₄ used as the dominant molluscicide against slugs and snails, and formerly as solid camp-stove fuel.
Metalens
A metalens is a flat optical lens that focuses light using a thin metasurface of subwavelength nanostructures rather than curved glass, enabling miniature, lightweight optics for cameras, sensors, and displays.
Metalhead (Black Mirror)
"Metalhead" is the fifth episode of Black Mirror season 4 (2017), written by Charlie Brooker and directed by David Slade: a 41-minute black-and-white chase in which Maxine Peake's Bella flees Boston Dynamics-inspired robotic dogs in a post-apocalyptic Britain, notable for minimal dialogue and no allegory.
Metalite
Metalite is a Swedish modern power/melodic metal band formed in Stockholm in 2015 by Edwin Premberg, fronted by vocalist Erica Ohlsson since 2019, with albums Heroes in Time, Biomechanicals, A Virtual World, Expedition One, and Discovery.