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Impaction of thin films from polar solvent Si/SiO x nanoparticle inks
Journal of Coatings Technology and Research ( IF 2.3 ) Pub Date : 2020-07-22 , DOI: 10.1007/s11998-020-00368-7
Sergei S. Bubenov , Sergey G. Dorofeev , Vadim M. Popelensky , Nikolay N. Kononov , Tatyana A. Kuznetsova

Impaction techniques have so far been efficiently used for formation of films from nanoparticles when coupled to synthetic process. However, this approach limits the choice of shapes and compositions of particles, so techniques of impaction of ready-made particles are desirable. To this end, the use of nanoparticle inks as a source of solid material is first described in this paper. The films are cast from dispersions of polar solvent-susceptible Si/SiOx nanoparticles. Water, ethanol, and acetonitrile are studied for solvents, and the latter two are shown to be suitable, as they possess lower surface tension and lower boiling points. Microscopically uniform films of nanoparticles are formed when aerosol and substrate are heated, with density of films approaching 40% of that of the bulk material. Higher stagnation pressure is beneficial for deposition, while further heating of the aerosol beyond the solvent evaporation can cause oligomerization of the solvent. Deposition of dense films in subsonic part of the jet appears possible with the technique.



中文翻译:

极性溶剂Si / SiO x纳米墨水对薄膜的冲击

迄今为止,当与合成过程结合时,碰撞技术已经有效地用于由纳米颗粒形成膜。然而,这种方法限制了颗粒的形状和组成的选择,因此期望撞击现有颗粒的技术。为此,本文首先介绍了使用纳米粒子墨水作为固体材料的来源。薄膜是由对极性溶剂敏感的Si / SiO x的分散体浇铸而成的纳米粒子。对水,乙醇和乙腈进行了溶剂研究,后两种溶剂被证明是合适的,因为它们具有较低的表面张力和较低的沸点。当气雾剂和基质被加热时,会形成微观均匀的纳米颗粒薄膜,薄膜的密度接近整体材料密度的40%。较高的停滞压力对于沉积是有利的,而气溶胶的进一步加热超过溶剂蒸发会导致溶剂低聚。用该技术可能在喷流的亚音速部分沉积致密的膜。

更新日期:2020-07-23
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