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A photoluminescence (PL) and Raman spectroscopy study of various diamond samples that have high concentrations of nitrogen‐vacancy (NV) color centers up to multiple parts per million (ppm) is presented. With green, red, and near‐infrared (NIR) light excitation, it is demonstrated that while for samples with a low density of NV centers the signals are primarily dominated by Raman scattering from the...
In the formation of SWCNT controlling of its diameter and chirality will be shown to be affected by controlling the size of the metal catalyst. The usual size of carbon nanohorn (CNH) particles is about 80 nm but its smaller size of less than 30nm is needed for a biomedical application purpose because of their permeation through biological cell membranes. The small CNHs have been successfully realized...
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