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@article{Khodaparast:2021:10.1021/acs.langmuir.0c02821,
author = {Khodaparast, S and Marcos, J and Sharratt, WN and Tyagi, G and Cabral, JT},
doi = {10.1021/acs.langmuir.0c02821},
journal = {Langmuir: the ACS journal of surfaces and colloids},
pages = {230--239},
title = {Surface-induced crystallization of sodium dodecyl sulfate (SDS) micellar solutions in confinement},
url = {http://dx.doi.org/10.1021/acs.langmuir.0c02821},
volume = {37},
year = {2021}
}

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TY  - JOUR
AB  - We investigate the role of confinement on the onset of crystallization in subcooled micellar solutions of sodium dodecyl sulfate (SDS), examining the impact of sample volume, substrate surface energy, and surface roughness. Using small angle neutron scattering (SANS) and dynamic light scattering (DLS), we measure the crystallization temperature upon cooling and the metastable zone width (MSZW) for bulk 10–30 wt% SDS solutions. We then introduce a microdroplet approach to quantify the impact of surface free energy (18–65 mN/m) and substrate roughness (Rα  0–60 μm) on the kinetics of surface-induced crystallization through measurements of induction time (ti) under isothermal conditions. While ti is found to decrease exponentially with decreasing temperature (increasing subcooling) for all tested surfaces, increasing the surface energy could cause a significant further reduction of up to ∼40 fold. For substrates with the lowest surface energy and longest ti, microscale surface roughness is found to enhance crystal nucleation, in particular for Rα ≥ 10 μm. Finally, we demonstrate that tuning the surface energy and microscopic roughness can be effective routes to promote or delay nucleation in bulk-like volumes, thus greatly impacting the stability of surfactant solutions at lower temperatures.
AU  - Khodaparast,S
AU  - Marcos,J
AU  - Sharratt,WN
AU  - Tyagi,G
AU  - Cabral,JT
DO  - 10.1021/acs.langmuir.0c02821
EP  - 239
PY  - 2021///
SN  - 0743-7463
SP  - 230
TI  - Surface-induced crystallization of sodium dodecyl sulfate (SDS) micellar solutions in confinement
T2  - Langmuir: the ACS journal of surfaces and colloids
UR  - http://dx.doi.org/10.1021/acs.langmuir.0c02821
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000610993500024&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://pubs.acs.org/doi/10.1021/acs.langmuir.0c02821
UR  - http://hdl.handle.net/10044/1/97213
VL  - 37
ER  -

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