The primary effect of high pressure is volume contraction and hence the shortening of interatomic and intermolecular distances. Along with structural modifications are various changes in physical properties such as electric/thermal conductivity, viscosity, melting and magnetic properties. Exploring and understanding the new physical phenomenon under high pressure will open new avenues for...

High pressure chemistry is still a new subject. Pressure can reduce the intermolecular distances which can increase the intermolecular interaction dramatically. When the intramolecular and intermolecular forces are comparable with each other, the system is thermodynamically unstable and the reaction takes place. The high pressure chemical reaction is a solid phase reaction and the reaction path is...

Super-hard material have gained a lot of interest due to their extensive application in industrial areas, such as the polishing, cutting tools, and hard wear protective coatings. Synthetic diamond and cubic boron nitride are major commercial high pressure materials. Because of the huge commercial application of super-hard material, a lot of attempts have been tried to search and create new super...

The composition and evolution of the earth and planets has great influence on the emergence and development of the life. However, information of the earth's deep interior and the planets cannot be accessed directly, since no borehole can be drilled more than twelve kilometer by present techniques, which is far less than the earth's six thousands kilometers radius, not to mention drilling a hole in...

A lot of technologies, such as optical spectroscopy, resistivity measurements, and magnetic measurements have been used by scientists in HPSTAR to study the high pressure phenomena. The optical spectroscopy techniques mainly include high pressure Raman spectroscopy, Brillouin scattering, infrared spectroscopy, and optical reflectivity. Electrical resistivity of materials under high pressure can be...

Brilliant synchrotron x-rays provide excellent probes for micron-scale samples for a variety of experimental measurements at high pressure. Complex samples at increasingly higher pressures and more extreme temperatures are being studied with higher accuracy probes for characterization of structural, electronic, and phonon properties. The synchrotron techniques including
X-ray diffraction, X-ray...

High pressure studies have revealed that the phase transitions, elastic properties and defect-associated deformation mechanisms of materials are domain size dependent. High pressure nano science is a fast emerging field which holds great promise for the discovery of new physics, chemistry and novel properties for applications.

Our research aims to understand how to manipulate functional materials properties and synthesize novel materials with unique functionality using high pressure. High pressure is a promising approach to achieve the highest Tc for superconductor, the highest thermal conductivity, the strongest piezoelectric, thermoelectric effect, etc.

The extreme P-T studies provide a new route towards discovering advanced structural materials and new materials with enhanced performance for energy transformation (i.e. solar, mechanical, chemical to electrical), energy storage (i.e., batteries, capacitors, hydrogen), and energy transmission, sensing and monitoring.