Rao Kota Sreenivasa, El-Hami Khalil, Kodaki Tsutomu, Matsushige Kazumi, Makino Keisuke
Venture Business Laboratory, Kyoto University, Yoshida-Honmachi, Sakyo-ku, Japan.
J Colloid Interface Sci. 2005 Sep 1;289(1):125-31. doi: 10.1016/j.jcis.2005.02.019.
A sequential method has been used, for the first time, to prepare monodisperse and uniform-size silica nanoparticles using ultrasonication by sol-gel process. The silica particles were obtained by hydrolysis of tetraethyl orthosilicate (TEOS) in ethanol medium and a detailed study was carried out on the effect of different reagents on particle sizes. Various-sized particles in the range 20-460 nm were synthesized. The reagents ammonia (2.8-28 mol L(-1)), ethanol (1-8 mol L(-1)), water (3-14 mol L(-1)), and TEOS (0.012-0.12 mol L(-1)) were used and particle size was examined under scanning electron microscopy and transmission electron microscopy. In addition to the above observations, the effect of temperature on particle size was studied. The results obtained in the present study are in agreement with the results observed for the electronic absorption behavior of silica particles, which was measured by UV-vis spectrophotometry.
首次采用一种连续方法，通过溶胶-凝胶过程利用超声处理制备单分散且尺寸均匀的二氧化硅纳米颗粒。二氧化硅颗粒通过原硅酸四乙酯（TEOS）在乙醇介质中的水解获得，并对不同试剂对颗粒尺寸的影响进行了详细研究。合成了尺寸范围在20 - 460 nm的各种尺寸颗粒。使用了试剂氨（2.8 - 28 mol L(-1)）、乙醇（1 - 8 mol L(-1)）、水（3 - 14 mol L(-1)）和TEOS（0.012 - 0.12 mol L(-1)），并在扫描电子显微镜和透射电子显微镜下检查颗粒尺寸。除上述观察结果外，还研究了温度对颗粒尺寸的影响。本研究获得的结果与通过紫外-可见分光光度法测量的二氧化硅颗粒电子吸收行为所观察到的结果一致。
