DOE Development of Designer Diamonds Research Team Facilities Patents What is a designer diamond anvil? Electrical Measurements Using Designer Diamond Anvils Multitasking Designer Diamonds -- Vertical Integration of Multiple Sensors Isotopically-Enriched Designer-Diamond Anvil Research Publications resulting from the grant: HIGH PRESSURE MATERIALS RESEARCH Contact Us		Isotopically-Enriched Designer-Diamond Anvil For high-pressure experiments at high temperature, such as electrical heating with micro-coils in a DAC, it is desirable to reduce the thermal conductivity of diamond to thermally insulate the culet from the bulk of the anvil. It is well known that isotopic mixing of diamond can lower the thermal conductivity of diamond. Isotopically pure diamond has a thermal conductivity that is 50% higher than that of natural abundance diamond crystals. It is also desirable for pressure-sensing applications to have a pure 13C diamond culet so that a 12C diamond chip can be used in a sample chamber as a pressure-temperature sensor in a high-pressure, high temperature diamond anvil cell. Therefore, there is a motivation to produce designer diamond anvils where diamond culets can be modified by isotopic mixing of 12C and 13C (Fig. 5) for electrical heating of samples in a DAC as well as for pressure sensing applications.
				Figure 5
				Figure 5: The comparison of the Raman spectra recorded from the isotopically mixed diamond layer and of the substrate. The isotopically mixed layer shows a clear doublet as compared to the single peak observed from the substrate.

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University of Alabama at Birmingham, Department of Physics