Crystallization mechanisms in convective particle assembly

Langmuir : the ACS Journal of Surfaces and Colloids
Philip BornTobias Kraus

Abstract

Colloidal particles are continuously assembled into crystalline particle coatings using convective fluid flows. Assembly takes place inside a meniscus on a wetting reservoir. The shape of the meniscus defines the profile of the convective flow and the motion of the particles. We use optical interference microscopy, particle image velocimetry, and particle tracking to analyze the particles' trajectory from the liquid reservoir to the film growth front and inside the deposited film as a function of temperature. Our results indicate a transition from assembly at a static film growth front at high deposition temperatures to assembly in a precursor film with high particle mobility at low deposition temperatures. A simple model that compares the convective drag on the particles to the thermal agitation explains this behavior. Convective assembly mechanisms exhibit a pronounced temperature dependency and require a temperature that provides sufficient evaporation. Capillary mechanisms are nearly temperature independent and govern assembly at lower temperatures. The model fits the experimental data with temperature and particle size as variable parameters and allows prediction of the transition temperatures. While the two mechanisms are...Continue Reading

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Citations

Jan 15, 2013·Langmuir : the ACS Journal of Surfaces and Colloids·Xiaoyan SunZexin Zhang
Sep 24, 2015·Chemical Society Reviews·Katherine R PhillipsJoanna Aizenberg
Nov 26, 2015·Langmuir : the ACS Journal of Surfaces and Colloids·N A FleckTobias Kraus
Aug 5, 2015·Soft Matter·Midhun JoyJames F Gilchrist
Apr 1, 2016·Langmuir : the ACS Journal of Surfaces and Colloids·Xiaoyun LiYongjun Zhang
Jul 2, 2015·Langmuir : the ACS Journal of Surfaces and Colloids·Nadia Ziane, Jean-Baptiste Salmon
Aug 24, 2016·Chemical Reviews·Michael A BolesDmitri V Talapin
Dec 20, 2016·Langmuir : the ACS Journal of Surfaces and Colloids·Michael AgtheLennart Bergström
Dec 15, 2016·Langmuir : the ACS Journal of Surfaces and Colloids·Frédéric DoumencBéatrice Guerrier
Aug 4, 2021·Proceedings of the National Academy of Sciences of the United States of America·Ling LiJoanna Aizenberg
Dec 10, 2016·Langmuir : the ACS Journal of Surfaces and Colloids·Junying WengYongjun Zhang
Oct 6, 2018·ACS Omega·Jo Sing Julia TangNicolas Vogel
Mar 13, 2020·Nano Letters·Rebecca MomperAndreas Riedinger

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