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Title: Surfactant Assemblies on Selected Nanostructured Surfaces: Evidence, Driving Forces, and Applications

Abstract

Surfactant adsorption at solid–liquid interfaces is critical for a number of applications of vast industrial interest and can also be used to seed surface-modification processes. Many of the surfaces of interest are nanostructured, as they might present surface roughness at the molecular scale, chemical heterogeneity, as well as a combination of both surface roughness and chemical heterogeneity. These effects provide lateral confinement on the surfactant aggregates. It is of interest to quantify how much surfactant adsorbs on such nanostructured surfaces and how the surfactant aggregates vary as the degree of lateral confinement changes. This review focuses on experimental evidence on selected substrates, including gold- and carbon-based substrates, suggesting that lateral confinement can have pronounced effects both on the amount adsorbed and on the morphology of the aggregates as well as on a systematic study, via diverse simulation approaches, on the effect of lateral confinement on the structure of the surfactant aggregates. Atomistic and coarse-grained simulations conducted for surfactants on graphene sheets and carbon nanotubes are reviewed, as well as coarse-grained simulations for surfactant adsorption on nanostructured surfaces. Lastly, we suggest a few possible extensions of these studies that could positively impact a few practical applications. In particular, the simultaneous effectmore » of lateral confinement and of the coadsorption of molecular compounds within the surface aggregates is expected to yield interesting fundamental results with long-lasting consequences in applications ranging from drug delivery to the design of advanced materials.« less

Authors:
ORCiD logo [1];  [2]
  1. Univ. College London, London (United Kingdom). Dept. of Chemical Engineering
  2. Univ. of Oklahoma, Norman, OK (United States). School of Chemical, Biological and Materials Engineering
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center
Sponsoring Org.:
USDOE
OSTI Identifier:
1358640
Alternate Identifier(s):
OSTI ID: 1487280
Resource Type:
Published Article
Journal Name:
Langmuir
Additional Journal Information:
Journal Volume: 33; Journal Issue: 33; Journal ID: ISSN 0743-7463
Publisher:
American Chemical Society
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Striolo, Alberto, and Grady, Brian Patrick. Surfactant Assemblies on Selected Nanostructured Surfaces: Evidence, Driving Forces, and Applications. United States: N. p., 2017. Web. doi:10.1021/acs.langmuir.7b00756.
Striolo, Alberto, & Grady, Brian Patrick. Surfactant Assemblies on Selected Nanostructured Surfaces: Evidence, Driving Forces, and Applications. United States. doi:10.1021/acs.langmuir.7b00756.
Striolo, Alberto, and Grady, Brian Patrick. Thu . "Surfactant Assemblies on Selected Nanostructured Surfaces: Evidence, Driving Forces, and Applications". United States. doi:10.1021/acs.langmuir.7b00756.
@article{osti_1358640,
title = {Surfactant Assemblies on Selected Nanostructured Surfaces: Evidence, Driving Forces, and Applications},
author = {Striolo, Alberto and Grady, Brian Patrick},
abstractNote = {Surfactant adsorption at solid–liquid interfaces is critical for a number of applications of vast industrial interest and can also be used to seed surface-modification processes. Many of the surfaces of interest are nanostructured, as they might present surface roughness at the molecular scale, chemical heterogeneity, as well as a combination of both surface roughness and chemical heterogeneity. These effects provide lateral confinement on the surfactant aggregates. It is of interest to quantify how much surfactant adsorbs on such nanostructured surfaces and how the surfactant aggregates vary as the degree of lateral confinement changes. This review focuses on experimental evidence on selected substrates, including gold- and carbon-based substrates, suggesting that lateral confinement can have pronounced effects both on the amount adsorbed and on the morphology of the aggregates as well as on a systematic study, via diverse simulation approaches, on the effect of lateral confinement on the structure of the surfactant aggregates. Atomistic and coarse-grained simulations conducted for surfactants on graphene sheets and carbon nanotubes are reviewed, as well as coarse-grained simulations for surfactant adsorption on nanostructured surfaces. Lastly, we suggest a few possible extensions of these studies that could positively impact a few practical applications. In particular, the simultaneous effect of lateral confinement and of the coadsorption of molecular compounds within the surface aggregates is expected to yield interesting fundamental results with long-lasting consequences in applications ranging from drug delivery to the design of advanced materials.},
doi = {10.1021/acs.langmuir.7b00756},
journal = {Langmuir},
number = 33,
volume = 33,
place = {United States},
year = {2017},
month = {5}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1021/acs.langmuir.7b00756

Figures / Tables:

Figure 1 Figure 1: Schematic of typical aggregates formed on solid surfaces exposed to aqueous surfactant systems. In the left panel are the structures observed on a hydrophilic surface (from top to bottom cylinders, spheres, and bilayers). In the right panel, the corresponding structures observed on a hydrophobic surface are shown (frommore » top to bottom hemicylinders, hemispheres, and monolayers). The hydrophilic surfactant headgroups are shown as blue spheres in this schematic, and the hydrophobic tailgroups are shown as black lines.« less

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Works referencing / citing this record:

Novel Amphiphiles and Their Applications for Different Purposes with Special Emphasis on Polymeric Surfactants
journal, June 2019

  • Chowdhury, Suman; Rakshit, Atanu; Acharjee, Animesh
  • ChemistrySelect, Vol. 4, Issue 23
  • DOI: 10.1002/slct.201901160

    Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.