#plastic crystals

Sinclaire canvas painting i did for my pookie bear :333!!!

Green material for refrigeration identified

Researchers from the UK and Spain have identified an eco-friendly solid that could replace the inefficient and polluting gases used in most refrigerators and air conditioners.

When put under pressure, plastic crystals of neopentylglycol yield huge cooling effects—enough that they are competitive with conventional coolants. In addition, the material is inexpensive, widely available and functions at close to room temperature. Details are published in the journal Nature Communications.

The gases currently used in the vast majority of refrigerators and air conditioners —hydrofluorocarbons and hydrocarbons (HFCs and HCs)—are toxic and flammable. When they leak into the air, they also contribute to global warming.

"Refrigerators and air conditioners based on HFCs and HCs are also relatively inefficient," said Dr. Xavier Moya, from the University of Cambridge, who led the research with Professor Josep Lluís Tamarit, from the Universitat Politècnica de Catalunya. "That's important because refrigeration and air conditioning currently devour a fifth of the energy produced worldwide, and demand for cooling is only going up."

Drew Hatsune miku and my friend bought it ^^!!!!

Tunable and mechanically robust ferroelectric ionic plastic crystals

New research by a group from Hokkaido University in Japan has shown that the plastic ionic crystal, quinuclidinium perrhenate, has ferroelectric properties and can serve as a model for finding new plastic ionic crystals that demonstrate ferroelectricity with directional tunability. Their work appears in Nature Chemistry.

Ferroelectric materials are spontaneously polarizable. The polarity of ferroelectric materials can be reversed by placing the material in an inverted external electric field. This ability to switch the material's polarity has been used for several applications including memory devices. Organic ferroelectric materials, in particular, are of interest because they are non-toxic and easier to make than their inorganic counterparts.

However, there are several obstacles to practical application of organic ferroelectric crystals. Each crystal in a substance can be polarized only along its polarization axis, which is dependent on the molecular dipole orientation within the crystal. For effective performance of ferroelectric materials, the polarization axis of the individual crystals in a substance must align in a particular direction. In contrast to the high symmetry seen in inorganic ferroelectrics, the low symmetry in organic crystals has made it difficult to fabricate ferroelectric materials with their polarization axes aligned in the desired direction.

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