Structure of surfactant and phospholipid monolayers at the air/water interface modeled from neutron reflectivity data

Journal of Colloid and Interface Science
Richard A CampbellM Jayne Lawrence

Abstract

Specular neutron reflectometry is a powerful technique to resolve interfacial compositions and structures in soft matter. Surprisingly however, even after several decades, a universal modeling approach for the treatment of data of surfactant and phospholipid monolayers at the air/water interface has not yet been established. To address this shortcoming, first a systematic evaluation of the suitability of different models is presented. The result is a comprehensive validation of an optimum model, which is evidently much needed in the field, and which we recommend as a starting point for future data treatment. While its limitations are openly discussed, consequences of failing to take into account various key aspects are critically examined and the systematic errors quantified. On the basis of this physical framework, we go on to show for the first time that neutron reflectometry can be used to quantify directly in situ at the air/water interface the extent of acyl chain compaction of phospholipid monolayers with respect to their phase. The achieved precision of this novel quantification is ∼10%. These advances together enhance significantly the potential for exploitation in future studies data from a broad range of systems inclu...Continue Reading

Citations

Mar 1, 2019·Physical Chemistry Chemical Physics : PCCP·Andrew R McCluskeyThomas Arnold
Mar 10, 2020·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Krassimir Stoev, Kenji Sakurai
May 5, 2020·Nanoscale Horizons : the Home for Rapid Reports of Exceptional Significance in Nanoscience and Nanotechnolgy·Erik BergendalMark W Rutland
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