Modulation of the coffee-ring effect in particle/surfactant mixtures: the importance of particle-interface interactions

Langmuir : the ACS Journal of Surfaces and Colloids
Manos AnyfantakisDamien Baigl

Abstract

We study the effect of surfactants on the deposits formed after the evaporation of colloidal suspension drops, at initial concentrations lower than the critical micellar concentrations, for various particle/surfactant mixtures. We show that the surfactant-mediated interactions between particles and the liquid-gas (LG) and liquid-solid (LS) interfaces, rather than the flow patterns, primarily define the morphology of the dry deposit in a robust and reproducible manner. For like-charged particle/surfactant mixtures, most of the particles form a ring-shaped deposit (according to the so-called "Coffee-Ring Effect"), but some particles can also be deposited inside the ring in a way that is modulated by electrostatic interactions between the particles and the LS interface. For oppositely charged systems, surfactant adsorption to the particle surface strongly affects particle-LG interface interactions, which in turn control the deposition pattern. For low surfactant concentrations, coffee-rings are systematically observed. For intermediate concentrations, the charge of surfactant-decorated particles becomes nearly neutral, and their hydrophobicity is enhanced, which promotes particle trapping at the LG interface. A particle skin is fo...Continue Reading

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Citations

Dec 8, 2015·ACS Applied Materials & Interfaces·Jiazhen SunYanlin Song
Dec 3, 2015·Nano Letters·Subramanyan Namboodiri VaranakkottuDamien Baigl
Aug 4, 2015·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Manos Anyfantakis, Damien Baigl
Sep 4, 2015·The Journal of Chemical Physics·Yong-Jun ChenKenichi Yoshikawa
May 12, 2016·ACS Applied Materials & Interfaces·Bernard P BinksMichael A Thompson
Jun 15, 2016·Langmuir : the ACS Journal of Surfaces and Colloids·George KarapetsasOmar K Matar
Jul 15, 2016·Physical Chemistry Chemical Physics : PCCP·Xin Zhong, Fei Duan
Jul 21, 2016·Langmuir : the ACS Journal of Surfaces and Colloids·J Rodrigo Vélez-CorderoJosé L Arauz-Lara
Dec 31, 2016·Langmuir : the ACS Journal of Surfaces and Colloids·Alican GençerWim Thielemans
Jan 4, 2017·Langmuir : the ACS Journal of Surfaces and Colloids·Guozhi XuZhen Tong
May 27, 2017·Langmuir : the ACS Journal of Surfaces and Colloids·Mingfei Zhao, Xin Yong
Jul 12, 2017·The Journal of Physical Chemistry. B·Sun Choi, Giovanni Birarda
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Apr 3, 2021·Langmuir : the ACS Journal of Surfaces and Colloids·Jing ShiColin D Bain
Jul 3, 2021·Sensors·Yojana J P CarreónRoberto Zenit
Jun 9, 2021·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Eduardo GuzmánRamón G Rubio
Jul 31, 2021·Langmuir : the ACS Journal of Surfaces and Colloids·Jacopo Vialetto, Manos Anyfantakis
Apr 2, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Etienne Jambon-Puillet
Dec 13, 2016·Langmuir : the ACS Journal of Surfaces and Colloids·Haihua ZhouYanlin Song
Oct 8, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Aiting GaoWerner Steffen
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