TY - JOUR
T1 - Compression-Induced Topographic Corrugation of Air/Surfactant/Water Interface
T2 - Effect of Nanoparticles Adsorbed beneath the Interface
AU - Chae, Inseok
AU - Ngo, Dien
AU - Makarem, Mohamadamin
AU - Ounaies, Zoubeida
AU - Kim, Seong H.
N1 - Funding Information:
This work was supported by the Air Force Office of Scientific Research (AFOSR) (grant no. FA9550-16-1-0062). The calculation of SFG intensities as a function of interparticle distances was done with the partial support from the Center for Lignocellulose Structure and Formation (CLSF), the Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, and the Office of Basic Energy Sciences under award number DE-SC0001090.
Funding Information:
This work was supported by the Air Force Office of Scientific Research (AFOSR) (grant no. FA9550-16-1-0062). The calculation of SFG intensities as a function of interparticle distances was done with the partial support from the Center for Lignocellulose Structure and Formation (CLSF), the Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, and the Office of Basic Energy Sciences under award number DE-SC0001090.
Publisher Copyright:
Copyright © 2019 American Chemical Society.
PY - 2019/10/24
Y1 - 2019/10/24
N2 - The compression isotherm of a Langmuir film can provide information on the structural order and density of interfacial molecules. When nanoparticles are introduced to the Langmuir film at an air/liquid interface, the compression isotherm is altered substantially. In this study, we report experimental evidence of topographic corrugation of the air/surfactant/water interface due to compression of nanoparticles adsorbed underneath the surfactant layer. A monolayer of cationic surfactants is suspended in a Langmuir trough with negatively charged nanoparticles in the aqueous subsurface. Changes in structural orders of the interfacial molecules and nanoparticles were characterized using in situ sum-frequency generation (SFG) spectroscopy during compression and associated with the modified compression isotherm in the presence of nanoparticles. This work elucidated changes in the compression isotherm due to the variation of surface geometry, which is required to produce a desired Langmuir film made of nanoparticles.
AB - The compression isotherm of a Langmuir film can provide information on the structural order and density of interfacial molecules. When nanoparticles are introduced to the Langmuir film at an air/liquid interface, the compression isotherm is altered substantially. In this study, we report experimental evidence of topographic corrugation of the air/surfactant/water interface due to compression of nanoparticles adsorbed underneath the surfactant layer. A monolayer of cationic surfactants is suspended in a Langmuir trough with negatively charged nanoparticles in the aqueous subsurface. Changes in structural orders of the interfacial molecules and nanoparticles were characterized using in situ sum-frequency generation (SFG) spectroscopy during compression and associated with the modified compression isotherm in the presence of nanoparticles. This work elucidated changes in the compression isotherm due to the variation of surface geometry, which is required to produce a desired Langmuir film made of nanoparticles.
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U2 - 10.1021/acs.jpcc.9b05220
DO - 10.1021/acs.jpcc.9b05220
M3 - Article
AN - SCOPUS:85073155163
SN - 1932-7447
VL - 123
SP - 25628
EP - 25634
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
IS - 42
ER -