نتایج جستجو برای: diamonds culture
تعداد نتایج: 278947 فیلتر نتایج به سال:
Small-angle X-ray scattering (SAXS) was performed on single-crystal chemical vapor deposition (CVD) diamonds with low nitrogen concentrations, which were fabricated by microwave plasma-assisted chemical vapor deposition at high growth rates. High optical quality undoped 500 µm-thick single-crystal CVD diamonds grown without intentional nitrogen addition proved to be excellent as windows on SAXS...
Diamond microcrystals have been synthesized using ultrasonic cavitation of a suspension of hexagonal graphite in various organic liquid media, at an average bulk temperature of the liquid up to 120°C and at atmospheric pressure. The yield of diamond is up to 10% by mass. The diamonds were characterized by scanning electron microscopy, X-ray diffraction and laser Raman spectroscopy. Analysis of ...
Abstract We report on the optical properties of He-related color centers created by He-ion implantation and subsequent thermal annealing in natural diamonds, including temperature (300–700 K) excitation power (1–1800 kW/cm 2 )-dependent photoluminescence (PL) measurements. The prospects for use He-implanted diamonds sensing are discussed. effect fast neutron irradiation Si-V CVD were also exami...
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