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Preparation of monodisperse silica particles with controllable size and shape

机译:尺寸和形状可控的单分散二氧化硅颗粒的制备

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摘要

The effects of dilution of tetraethyl orthosilicate (TEOS) with ethanol on the shape and monodispersity of silica particles were investigated. The results indicated that the dilution of TEOS with ethanol can depress the formation of new nuclei and the aggregation or adhesion of particles and make the distillation of TEOS unnecessary to achieve monodispersed silica spheres. A seeded growth technique using continuous drop addition of TEOS diluted with 4x volume of ethanol was developed to improve monodispersity and spheric shape and increase the size of silica particles. The monodisperse silica particles (150 nm +- 5%-1.2 μm +- 1%) with fine spheric shape were successfully synthesized by the seeded growth technique. Using the homemade 280 nm +- 2.8% silica spheres, we prepared opals of high quality which showed periodically ordered packing and a photonic band-gap effect.
机译:研究了用乙醇稀释原硅酸四乙酯(TEOS)对二氧化硅颗粒形状和单分散性的影响。结果表明,用乙醇稀释TEOS可以抑制新核的形成以及颗粒的聚集或粘附,并且不需要蒸馏TEOS即可获得单分散的二氧化硅球。开发了一种种子生长技术,该技术采用连续滴加TEOS(稀释度为4倍体积的乙醇)的方法,以改善单分散性和球形并增加二氧化硅颗粒的尺寸。通过种子生长技术成功地合成了球形的单分散二氧化硅颗粒(150 nm +-5%-1.2μm-1%)。使用自制的280 nm±2.8%二氧化硅球,我们制备了高质量的蛋白石,该蛋白石表现出周期性有序的堆积和光子带隙效应。

著录项

  • 来源
    《Journal of Materials Research》 |2003年第3期|p.649-653|共5页
  • 作者单位

    National Laboratory of Solid State Microstructures, Department of Physics, Nanjing University, Nanjing 210093, People's Republic of China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 工程材料学;
  • 关键词

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