Materials Science – Page 17 – En.BuradaBiliyorum.Com

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#Copper-catalyzed enantioselective trifluoromethylation of benzylic radicals developed

Admin6 years ago04 mins

“#Copper-catalyzed enantioselective trifluoromethylation of benzylic radicals developed” Credit: CC0 Public Domain Scientists from the Shanghai Institute of Organic Chemistry of the Chinese Academy of Sciences (CAS) have developed the first copper-catalyzed enantioselective trifluoromethylation of benzylic radicals via a copper-catalyzed radical relay strategy. The incorporation of trifluoromethyl (CF3) groups into biologically active molecules has a significant…

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#Epitaxial antiperovskite/perovskite heterostructures for materials design

Admin6 years ago015 mins

“#Epitaxial antiperovskite/perovskite heterostructures for materials design” Schematic representation of the crystal structures of M3XN nitride antiperovskite and ABO3 oxide perovskite compounds and their interfaces. (A) M3XN and ABO3 ideal unit cells showing their geometrically analogous crystal structures and reversed anion (N and O) and cation (M and B) positions in the unit cell. (B) M3XN…

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#The varnishing point: Where science meets art

Admin6 years ago09 mins

“#The varnishing point: Where science meets art” In 2014, the art conservation world was thrown into chaos when the company producing MS2A varnish shut down. No one else had the technical knowledge to continue making the go-to varnish for art conservators worldwide. Those who had stocked up used the precious liquid sparingly, dreading the day…

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#’Fool’s gold’ may be valuable after all

Admin6 years ago08 mins

“#’Fool’s gold’ may be valuable after all” This image shows an example of a crystal of iron sulfide grown in the University of Minnesota lab to extremely high purity using a method called chemical vapor transport. Note the “goldish” sheen, which is characteristic of pyrite, or fool’s gold. Credit: University of Minnesota In a breakthrough…

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#Nondestructive positron beams probe damage, support safety advances in radiation environments

Admin6 years ago05 mins

“#Nondestructive positron beams probe damage, support safety advances in radiation environments” A combination of positron annihilation spectroscopy and transmission electron microscopy reveals new insights into how damage is formed in irradiated materials, suggesting a mechanism in which large holes in the material absorb atoms in interstitial positions in the lattice and shrink, but leave behind…

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#How a crystalline sponge sheds water molecules

Admin6 years ago08 mins

“#How a crystalline sponge sheds water molecules” A microscope image showing a porous, crystalline material called a metal-organic framework, or MOF (the material in purple). This MOF is made from cobalt(II) sulfate heptahydrate, 5-aminoisophthalic acid and 4,4′-bipyridine, and it is shown in its hydrated state. Credit: Travis Mitchell How does water leave a sponge? In…

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#Transforming e-waste into a strong, protective coating for metal

Admin6 years ago05 mins

“#Transforming e-waste into a strong, protective coating for metal” The material (thick gray line in the center of the image) derived from e-waste remained intact when indented, and increased the hardness of the steel below it. Credit: Adapted from ACS Omega 2020, DOI: 10.1021/acsomega.0c00485 A typical recycling process converts large quantities of items made of…

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#New fabric could help keep you cool in the summer, even without A/C

Admin6 years ago04 mins

“#New fabric could help keep you cool in the summer, even without A/C” Credit: CC0 Public Domain Air conditioning and other space cooling methods account for about 10% of all electricity consumption in the U.S., according to the U.S. Energy Information Administration. Now, researchers reporting in ACS Applied Materials & Interfaces have developed a material…

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#Researchers pinpoint how sorbent materials catch and release carbon

Admin6 years ago09 mins

“#Researchers pinpoint how sorbent materials catch and release carbon” Credit: Unsplash/CC0 Public Domain A key component of ambient direct air capture (DAC) systems that remove carbon dioxide from the air is the sorbent material that is used to first capture the carbon and then to release it. Certain sorbent materials can pull carbon dioxide from…

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#Biphilic surfaces reduce defrosting times in heat exchangers

Admin6 years ago07 mins

“#Biphilic surfaces reduce defrosting times in heat exchangers” Time-lapse images of dynamic defrosting on superhydrophobic and biphilic surfaces. The time t = 0 represents the instant when melting of frost was first observed visually. Credit: Nenad Miljkovic, Grainger Engineering Ice formation and accumulation are challenging concerns for several industrial applications including heating ventilation air conditioning…