Crystal structure of Hg,Tl-1223 HTSC compound under high pressure and low temperature

Preserving Proteins Under High Pressure and Low Temperature

Our group has a continuing interest in devising new freezing-protection agents. To this end, we have systematically investigated the structure of aqueous electrolyte salt solutions and room-temperature ionic liquids (RTILs), which consist of the cations and anions. We found that such water-mixed solutions remain liquid even at 1.0 GPa and 77 K (achieved by rapid cooling at 500 K/min) (Imai et a...

Protein Crystal Growth Under High Pressure

Crystal structure of graphite under room-temperature compression and decompression

Recently, sophisticated theoretical computational studies have proposed several new crystal structures of carbon (e.g., bct-C(4), H-, M-, R-, S-, W-, and Z-carbon). However, until now, there lacked experimental evidence to verify the predicted high-pressure structures for cold-compressed elemental carbon at least up to 50 GPa. Here we present direct experimental evidence that this enigmatic hig...

The crystal structures of the low-temperature and high-pressure polymorphs of nitric acid.

A new high-pressure phase of pure nitric acid (HNO(3)) has been characterised at 1.6 GPa at room temperature by high-pressure neutron powder and X-ray single-crystal diffraction techniques. This is the first crystalline phase obtained upon compression of liquid nitric acid at room temperature and appears to be the stable phase up to pressures of at least 4 GPa. The crystal structure of this new...

Low-temperature electrical-transport properties of single-crystal bismuth films under pressure.

We report an investigation of the low-temperature electrical transport properties of bismuth films under applied hydrostatic pressure. Films with their trigonal axis perpendicular to the film plane and thicknesses of 30, 50, and 500 nm were grown by molecular-beam epitaxy on BaF2 substrates. At 500 nm thickness the behavior resembles that of bulk Bi. From the observed Shubnikov–de Haas oscillat...