Photoluminescence of CdSe Nanowires Grown With and Without Metal Catalyst
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چکیده
The crystal phase of Au-NWs is assessed by means of high-resolution transmission electron microscopy (HR-TEM). NWs are dispersed on a transmission electron microscopy (TEM) grid and imaged with a JEOL 4000EX-II TEM. Figure S-2(a) shows a HR-TEM lattice imaging of a representative Au-NW. The measured interplanar spacing (3.74 Å) is consistent with the (110) planes of a CdSe crystal with the wurtzite structure. Domains with a zinc blende structure are never observed along these NWs. Due to their larger diameter, SG-NWs have a much lower transparency to the electron beam; As a consequence, their crystallographic structure cannot be clearly resolved by HR-TEM as in Fig. S-2(a). Instead, phase identification
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