Wet-chemical synthesis of doped nanoparticles:: Blue-colored colloids of n-doped SnO2:Sb
Wet-chemical synthesis of doped nanoparticles:: Blue-colored colloids of n-doped SnO2:Sb
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DOI：
10.1063/1.479151
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发表时间：
1999-06-22
影响因子：
4.4
通讯作者：
Haase, M
中科院分区：
文献类型：
--
作者：
Nütz, T;zum Felde, U;Haase, M
在高压釜中水热法中处理锡锑氧化物胶体制备了锑掺杂二氧化锡纳米晶。在270 ℃的合成温度下，已经获得了蓝色SnO 2：Sb纳米晶的稳定胶体溶液。高分辨率透射电子显微镜（TEM）图像显示高度结晶的颗粒在4至9纳米的大小制度。的纳米晶体的X射线粉末衍射图案表明相同的金红石晶格结构，从散装SnO 2已知。与相应的未掺杂的体系相比，锑掺杂的纳米晶体的粉末表现出高达10（5）倍的电导率增加。掺杂胶体的蓝色对应于红色和IR区域中的宽吸收峰。沉积到蓝宝石衬底上的掺杂纳米颗粒的红外吸收光谱已被拟合到基于SnO 2：Sb中的自由电子气的Drude理论和有效介质近似的模型。该模型表明，红外吸收对应于弱相互作用的n掺杂纳米粒子的等离子体激元激发。(C)1999年美国物理学会。[S0021-9606（99）70924-4]。
Nanocrystallites of antimony-doped tin dioxide have been prepared hydrothermally by treating colloids of tin antimony oxide in an autoclave. At a synthesis temperature of 270 degrees C stable colloidal solutions of blue-colored SnO2:Sb nanocrystallites have been obtained. High resolution transmission electron microscopy (TEM) images show highly crystalline particles in the 4 to 9 nm size regime. X-ray powder diffraction patterns of the nanocrystals indicate the same rutile lattice structure as known from bulk SnO2. Powders of the antimony-doped nanocrystals exhibit an up to 10(5) fold increase in electrical conductivity as compared to the corresponding undoped systems. The blue color of the doped colloids corresponds to a broad absorption peak in the red and the IR region. The IR-absorption spectrum of doped nanoparticles deposited onto sapphire substrates has been fit to a model based on the Drude theory of a free electron gas in SnO2:Sb and an effective medium approximation. The model indicates that the IR absorption corresponds to a plasmon polariton excitation of weakly interacting n-doped nanoparticles. (C) 1999 American Institute of Physics. [S0021-9606(99)70924-4].