High Pressure:One of the many Tools to Study Material Properties at Extreme Conditions

Abstract

High pressure is a powerful and clean variable, which when applied can bring about large changes in structure and properties of materials. It can be used to simulate the conditions found deep inside the earth or in different planetary interiors. It is widely used in chemical industry, especially when the chemical reaction products have lower volumes than the initial reactants, and also in the food preservation industry, where it ensures that aromas and flavours are not lost even after preservation. Materials under pressure can be studied both theoretically and experimentally. In this article apart from discussing how to set up a basic high pressure experiment using the DAC, some examples have been elaborated to show how both experiments and theory complement each other and both put together can help in a deeper understanding of the changes brought about by application of high pressure.

Pressure Induced Nanoparticle Phase Behavior, Property, and Applications

“…Understanding the properties of NPs under elevated pressure serves both fundamental scientific interests and real-world applications. Pressure is a highly efficient tool to tune the structures in NP systems . In this section, the pressure-dependent mechanical, optical, and electronic properties of a variety of nanomaterials including metals, semiconductors, and organics are reviewed.…”

“…Pressure is a highly efficient tool to tune the structures in NP systems. 228 In this section, the pressuredependent mechanical, optical, and electronic properties of a variety of nanomaterials including metals, semiconductors, and organics are reviewed. The related existing and potential applications of these materials are also discussed.…”

First high-pressure XAFS results at the bending-magnet-based energy-dispersive XAFS beamline BL-8 at the Indus-2 synchrotron facility

“…HPXAFS experiments are amongst the most challenging due to the involvement of a diamond anvil cell (DAC) and the statistical and systematic noise it induces. A DAC consists of two diamond anvils, pressing a microgram-sized sample from opposite directions (Eremets, 1996;Shen & Mao, 2017;Garg, 2017;Sharma & Garg, 2017). The sample is contained within a micrometre-sized hole, drilled in the gasket between diamond anvils.…”