Jeedigunta Sathyaharish, Singh Manoj K, Kumar Ashok, Zekri Souheil, Bumgarner John, Rossie Benjamin
Nanomaterials and Nanomanufacturing Research Center, University of South Florida, Tampa, FL 33620, USA.
J Nanosci Nanotechnol. 2006 Mar;6(3):640-3. doi: 10.1166/jnn.2006.089.
Branched nanostructures of tin oxide (SnO2) have been synthesized by Vapor-Liquid-Solid (VLS) mechanism using a gold catalyst in the temperature range of 800-850 degrees C under an ambient gas flow of 200 sccm. The microstructural and the optical properties of the as prepared products have been studied by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), micro-Raman, and photoluminescence (PL) studies. SnO2 branches with a rutile phase are found to have a preferential orientation along (101). Typical lengths of these branches are found to be approximately 3-5 microm and diameters in the range of 50-100 nm. Selected area electron diffraction (SAED) pattern shows that the SnO2 branches have a tetragonal cross section with [101] crystal direction. A Raman line at 631 cm(-1) (Sn-O bond) is obtained in the micro Raman spectra. Low temperature PL spectrum shows a strong green emission band near 506 nm.
采用气-液-固（VLS）机制，在800-850摄氏度的温度范围内，使用金催化剂，在200 sccm的环境气流下合成了氧化锡（SnO2）分支纳米结构。通过X射线衍射（XRD）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、显微拉曼光谱和光致发光（PL）研究对所制备产物的微观结构和光学性质进行了研究。发现具有金红石相的SnO2分支沿（101）方向具有择优取向。这些分支的典型长度约为3-5微米，直径在50-100纳米范围内。选区电子衍射（SAED）图谱表明，SnO2分支具有[101]晶体方向的四方截面。在显微拉曼光谱中获得了位于631 cm-1处的拉曼线（Sn-O键）。低温PL光谱在506 nm附近显示出强绿色发射带。
