Controlled Deposition of Nanosize and Microsize Particles by Spin-Casting

被引:15
作者
Danglad-Flores, Jose [1 ,2 ]
Eftekhari, Karaneh [3 ]
Skirtach, Andre G. [3 ]
Riegler, Hans [1 ]
机构
[1] Max Planck Inst Colloids & Interfaces Theory & Bi, Sci Pk Golm, D-14424 Potsdam, Germany
[2] Tech Univ Berlin, Str 17,Juni 135, D-10623 Berlin, Germany
[3] Univ Ghent, Dept Biotechol, B-9000 Ghent, Belgium
关键词
THIN LIQUID-FILMS; COLLOIDAL CRYSTALS; NANOPARTICLES; FABRICATION; EVAPORATION; STABILITY; DYNAMICS;
D O I
10.1021/acs.langmuir.8b03311
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The deposition of nanosize and microsize spherical particles on planar solid substrates by hydrodynamic-evaporative spin-casting is studied. The particles are dispersed in a volatile liquid, which evaporates during the process, and the particles are finally deposited on the substrate. Their coverage, Gamma, depends on the processing parameters (concentration by weight, particles size, etc.). The behavior of the particles during the spin-casting process and their final Gamma values are investigated. It is found that for up to particle diameters of a few micrometers, particle deposition can be described by a theoretical approach developed for the spin-casting of polymer solutions (Karpitschka, S.; Weber, C. M.; Riegler, H. Chem. Eng. Sci. 2015, 129, 243-248. Danglad-Flores, J.; Eickelmann, S.; Riegler, H. Chem. Eng. Sci. 2018, 179, 257-264). For large particles, this basic theory fails. The causes of this failure are analyzed, and a corrected, more general theoretical approach is presented. It takes into account particle size effects as well as particle sedimentation. In summary, we present new insights into the spin-cast process of particle dispersions, analyze the contributions affecting the final particle coverage, and present a theoretical approach which describes and explains the experimental findings.
引用
收藏
页码:3404 / 3412
页数:9
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