It is presented a method, by which it could be assessed the middle size of the monocrystal nanoparticles in oxidfree porous silicon. The surface to volume ratio of the structure is considered as a measure for the particles diameter. In order to obtain this ratio, the relative number of hydrogen and silicon atoms was independently measured via a combination of thermal effusion and gravimetry. The results were verified using nuclear scattering experiments and oxidative combustion. The type of the hydrides on the surface of the nanocrystals was investigated by means of thermal effusion and infrared spectroscopy. The size is calculated assuming a certain shape of the particles and a middle surface density of the silicon atoms. The results were compared with the available literature data. The dependence of the luminescence maximum position on the size of the particles basically confirms the theoretical predictions.
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It is presented a method, by which it could be assessed the middle size of the monocrystal nanoparticles in oxidfree porous silicon. The surface to volume ratio of the structure is considered as a measure for the particles diameter. In order to obtain this ratio, the relative number of hydrogen and silicon atoms was independently measured via a combination of thermal effusion and gravimetry. The results were verified using nuclear scattering experiments and oxidative combustion. The type of the...
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