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The state of matter is determined by three main factors: pressure, temperature, and chemical composition. High pressure can have a significant impact on the physical and chemical properties of materials. As pressure increases, the distance between atoms decreases, which can lead to shortened chemical bonds and distorted electron orbitals. At some point, materials may undergo a transition into a new phase with a distinctive atomic arrangement and crystal structure, resulting in properties that are quite different from those observed under normal conditions.
The state of matter is determined by three main factors: pressure, temperature, and chemical composition. High pressure can have a significant impact on the physical and chemical properties of materials. As pressure increases, the distance between atoms decreases, which can lead to shortened chemical bonds and distorted electron orbitals. At some point, materials may undergo a transition into a new phase with a distinctive atomic arrangement and crystal structure, resulting in properties that are quite different from those observed under normal conditions.
For example, when subjected to high pressure, graphite can transform into diamond, a superhard and light-transparent material. With the help of advanced technologies such as high-pressure generation apparatus, synchrotron X-ray, and Raman spectroscopy, scientists can now explore the unique properties of materials under extreme conditions. The high-pressure technique has become an important tool for studying the nature of matter in solid, liquid, or gaseous states, and has many applications in fields such as materials science, geology, and chemistry.
For example, when subjected to high pressure, graphite can transform into diamond, a superhard and light-transparent material. With the help of advanced technologies such as high-pressure generation apparatus, synchrotron X-ray, and Raman spectroscopy, scientists can now explore the unique properties of materials under extreme conditions. The high-pressure technique has become an important tool for studying the nature of matter in solid, liquid, or gaseous states, and has many applications in fields such as materials science, geology, and chemistry.
The diamond anvil cell is a popular apparatus for generating high pressure, consisting of two opposing diamonds with small tips. By compressing a sample placed between the anvils, pressures as high as those found in the Earth's core (around 360 GPa) can be achieved. Diamond is transparent to a broad range of electromagnetic radiations, including X-rays, Raman scattering, and visible light, which allows in-situ measurements of samples to be carried out by integrating the diamond anvil cell with characterization facilities such as synchrotron X-ray and Raman spectroscopy.
The diamond anvil cell is a popular apparatus for generating high pressure, consisting of two opposing diamonds with small tips. By compressing a sample placed between the anvils, pressures as high as those found in the Earth's core (around 360 GPa) can be achieved. Diamond is transparent to a broad range of electromagnetic radiations, including X-rays, Raman scattering, and visible light, which allows in-situ measurements of samples to be carried out by integrating the diamond anvil cell with characterization facilities such as synchrotron X-ray and Raman spectroscopy.
Dr. Wang's research takes advantage of high-pressure techniques to investigate a range of material properties, including optical properties, elasticity, plasticity, phase stability, chemical reactivity, and microstructure evolution, such as defects, grain size, and grain boundaries. In addition, the high-pressure technique can be used to synthesize new materials with unique properties under extreme conditions.
Dr. Wang's research takes advantage of high-pressure techniques to investigate a range of material properties, including optical properties, elasticity, plasticity, phase stability, chemical reactivity, and microstructure evolution, such as defects, grain size, and grain boundaries. In addition, the high-pressure technique can be used to synthesize new materials with unique properties under extreme conditions.
Our laboratory is equipped with a piston-cylinder system purchased from the Depth of Earth Company in Arizona, which is capable of generating high pressures and temperatures of up to 4 GPa and 2500 K, respectively. This system is suitable for synthesizing new materials under extreme conditions, as well as for conducting ex-situ studies of materials at high pressures and temperatures.
Our laboratory is equipped with a piston-cylinder system purchased from the Depth of Earth Company in Arizona, which is capable of generating high pressures and temperatures of up to 4 GPa and 2500 K, respectively. This system is suitable for synthesizing new materials under extreme conditions, as well as for conducting ex-situ studies of materials at high pressures and temperatures.
Our laboratory has developed a Raman system specifically designed for studying the optical, vibrational, and elastic properties of materials under high pressure and cooling conditions. This system enables us to perform detailed spectroscopic analyses of materials subjected to extreme pressure, which can provide valuable insights into the fundamental physical and chemical properties of materials under different conditions. By combining our Raman system with other high-pressure techniques, such as diamond anvil cells or piston-cylinder systems, we can carry out comprehensive studies of materials at extreme conditions.
Our laboratory has developed a Raman system specifically designed for studying the optical, vibrational, and elastic properties of materials under high pressure and cooling conditions. This system enables us to perform detailed spectroscopic analyses of materials subjected to extreme pressure, which can provide valuable insights into the fundamental physical and chemical properties of materials under different conditions. By combining our Raman system with other high-pressure techniques, such as diamond anvil cells or piston-cylinder systems, we can carry out comprehensive studies of materials at extreme conditions.
A laboratory (>750 square feet) is equipped with instruments, tools, and devices for conducting high-pressure experimental research.
A laboratory (>750 square feet) is equipped with instruments, tools, and devices for conducting high-pressure experimental research.
We conduct high-pressure synchrotron X-ray diffraction experiments at the Advanced Photon Source of Argonne National Lab near Chicago on a regular basis.
We conduct high-pressure synchrotron X-ray diffraction experiments at the Advanced Photon Source of Argonne National Lab near Chicago on a regular basis.
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