Tree-like SnO2 nanowires and optical properties
Tree-like SnO2 nanowires and optical properties
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DOI：
10.1016/j.matchemphys.2010.11.052
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发表时间：
2011-03
影响因子：
4.6
通讯作者：
T. Tao;Qi-yuan Chen;Hui-ping Hu;Y. Chen
中科院分区：
文献类型：
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作者：
T. Tao;Qi-yuan Chen;Hui-ping Hu;Y. Chen
以sno2粉末为蒸发源，采用气固相法制备了树状sno2纳米线。采用x射线衍射仪（XRD）、x射线能谱仪（EDS）和扫描电镜（SEM）研究了样品的物相、结构演化和化学成分。该工艺生产的超长金红石纳米线的比例很大，直径50-150nm，长度可达几十微米。高分辨率透射电镜（HRTEM）显示，sno2纳米线呈（101）生长方向的单晶，分散的小晶体或纳米线为树枝状。利用傅里叶变换红外光谱（FT-IR）和光致发光光谱（PL）对sno2纳米结构进行了表征。树状纳米线的PL光谱以548nm为中心的强发射带为主。
Tree-like SnO2nanowires have been grown by a vapor–solid process using a milled SnO2powder as the evaporation source. Phase, structural evolution and chemical composition were investigated using X-ray diffraction (XRD), X-ray spectrometry (EDS), and scanning electron microscopy (SEM). The process yields a large proportion of ultra-long rutile nanowires of 50–150nm diameter and lengths up to several tens of micrometers. High-resolution transmission electron microscopy (HRTEM) shows that the SnO2nanowires are single crystals in the (101) growth direction with scattered smaller crystals or nanowires as the tree branches. The SnO2nanostructures were also examined using Fourier transform infra-red (FT-IR) and photoluminescence (PL) spectroscopy. A strong emission band centered at 548nm dominated the PL spectrum of the tree-like nanowires.