Tuesday , December 12 2017

Chemistry

MIT Chemists Create New Adaptable Metallic-Cage Gels

MIT chemists have created a new type of gel by linking metal organic cages with long polymer strands (blue). The red polymer strands, which loop back to the cages, can be used to further customize the gels by adding other molecules. By combining the flexibility of polymer gels with the rigid structure provided by metal-based clusters, chemists from MIT have ... Read More »

Organic Photovoltaic Material Offers Great Promise for Solar Energy

A top-down view of a photo-excited disordered molecular film. In this film the excited electron tends to spread out across multiple individual molecules in a non-uniform pattern that depends on the underlying disorder. Here, shape and size of the delocalized excitation is indicated by the shading of each molecular core; in this case the excitation is distributed into four non-overlapping ... Read More »

Scientists Reveal Chemical Code for Nitrogen Fixation

A team of scientists from Yale University reveal part of the chemical code that allows nature to transform nitrogen from the air into usable nitrogen compounds. The process is called nitrogen fixation, and it occurs in microorganisms on the roots of plants. This is how nature makes its own fertilizers to feed plants, which feed us. The enzyme responsible for ... Read More »

Scientists Discover Structural Change in Manganese Steel

Structural change in steel: Scientists at the Max-Planck-Institute use images from a transmission electron microscope (grey) to make linear defects in an alloy of iron (Fe) and manganese (Mn) visible. Atom probe tomography shows them the distribution of the iron (blue) and manganese atoms (green). They have put green iso-surfaces into the image where the concentration of the manganese atoms ... Read More »

UJI Patents New Graphene-Based Catalysts

José Mata By combining graphene and organometallic compounds, researchers have developed graphene-based materials that can catalyze reactions for the conversion and storage of energy. Researchers at the Universitat Jaume I have developed materials based on graphene that can catalyze reactions for the conversion and storage of energy. The technology patented by the UJI combines graphene and organometallic compounds in a ... Read More »

Scientists Observed Conventional Superconductivity at Minus 70 Degrees Celsius

The apparatus the team led by Mikhail Eremets at the Max Planck Institute for Chemistry in Mainz uses to generate extremely high pressures, is amazingly handy. The researchers press the metal cell with Allen screws together. The high pressure thus created in the center of the cell, only diamonds resist. The gems operate like anvils that compress a sample. Credit: ... Read More »

Graphene Helps Turn Engine Heat Into Electricity to Boost Gas Mileage

Using strontium titanium dioxide and graphene, scientists have developed of a material that can convert engine heat into electrical energy to reduce the need for fuels. It could also have applications in aerospace, manufacturing and other sectors. In 2012, the Obama administration announced fuel-efficiency standards that would require U.S. vehicles to average 54.5 miles per gallon by 2025. Improving gas ... Read More »

Scientists Discover a New Source of Greenhouse Gases

Lichens, mosses and cyanobacteria absorb large quantities of carbon dioxide (CO2) and also to some extent nitrogen (N2) from the atmosphere and emit nitrous oxide (N2O) and small quantities of methane (CH4). Credit: Karl-Heinz Kaupe Researchers from the Max Planck Institute for Chemistry reveal that lichens, mosses and cyanobacteria produce large amounts of nitrous oxide. Inconspicuous creatures surprise with a ... Read More »

Yale Study Reveals Why BRCA Gene Resists Cancer Treatment

A newly published study from Yale University reveals how biochemists might be able to decrease drug resistance to existing therapies that target ovarian and breast cancer. Yale University researchers have discovered why a key molecular assistant is crucial to the function of the BRCA2 gene, which in some mutant forms can lead to ovarian and breast cancer in as many ... Read More »

MIT Chemists Develop a Quantum-Dot Spectrometer

In this illustration, the Quantum Dot (QD) spectrometer device is printing QD filters — a key fabrication step. Other spectrometer approaches have complicated systems in order to create the optical structures needed. Here in the QD spectrometer approach, the optical structure — QD filters — are generated by printing liquid droplets. This approach is unique and advantageous in terms of ... Read More »