A novel means to generate high pressure
Michael Pravica1, Petrika Cifligu1, Adrian Lua Sanchez1
1Department of Physics and Astronomy, University of Nevada, Las Vegas, Nevada 89154, USA.
The Review of Scientific Instruments
|July 2, 2024
Summary
Researchers developed a new high-pressure technique using a modified diamond anvil cell. This method improves sample accessibility for experiments by confining the sample above the gasket, enhancing radiation collection.
Area of Science:
- High-pressure physics and materials science.
Background:
- Diamond anvil cells (DACs) are standard for pressures >2 GPa.
- Metallic gaskets in DACs can block electromagnetic radiation for techniques like NMR and X-ray absorption.
- Existing solutions involve low-Z materials or split gaskets, which have limitations.
Purpose of the Study:
- To present a novel method for generating high pressures in a DAC.
- To overcome the limitations of traditional gasket materials in high-pressure experiments.
- To enhance sample accessibility for radiation-based measurements.
Main Methods:
- A diamond anvil was modified with a laser-drilled hole in the tip.
- The sample was confined within this hole, sealed by a flat gasket.
- Pressure was applied, causing gasket material to flow into the hole, pressurizing the sample.
Main Results:
- The sample was confined above the gasket plane, improving accessibility.
- Enhanced aperture for X-ray and visible light collection was achieved.
- Successful high-pressure Raman spectra of SnC2O4 and X-ray diffraction of seleno-DL-cystine were obtained.
Conclusions:
- This novel DAC method effectively generates high pressures.
- The technique enhances sample accessibility for various experimental probes.
- It offers a promising alternative for high-pressure studies requiring radiation coupling.
