Applications of small-angle X-ray scattering/small-angle neutron scattering and cryogenic transmission electron microscopy to understand self-assembly of surfactants

Fan, Yaxun; Wang, Yilin

doi:10.1016/j.cocis.2019.02.011

Cited by 26 publications

(12 citation statements)

References 121 publications

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“…Usually, these systems are studied using scattering methods (light, X-ray and neutron scattering) combined with imaging techniques such as cryogenic electron microscopy. [45] To study colloidal structures on surfaces, synchrotron GISAXS and bio-AFM are often applied to study the sample under native (hydrated) conditions or even under water using suitable sample environments. [40b] Scattering methods are powerful tools for the characterization of nanostructures in solution and on surfaces as they are noninvasive and provide statistical information on the structures in the scattering volume.…”

Section: Methods For Nanomaterials Characterizationmentioning

confidence: 99%

Design and Characterization of Bio-inspired Antimicrobial Nanomaterials

Zabara

Hong

Salentinig

2020

Chimia

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Colloidal structures are crucial components in biological systems and provide a vivid and seemingly infinite source of inspiration for the design of functional bio-inspired materials. They form multi-dimensional confinements and shape living matter, and transport and protect bioactive molecules in harsh biological environments such as the stomach. Recently, colloidal nanostructures based on natural antimicrobial peptides have emerged as promising alternatives to conventional antibiotics. This contribution summarizes the recent progress in the understanding and design of these bio-inspired antimicrobial nanomaterials, and discusses their advances in the form of dispersions and as surface coatings. Their potential for applications in future food and healthcare materials is also highlighted. Further, it discusses challenges in the characterization of structure and dynamics in these materials.

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Section: Methods For Nanomaterials Characterizationmentioning

confidence: 99%

Design and Characterization of Bio-inspired Antimicrobial Nanomaterials

Zabara

Hong

Salentinig

2020

Chimia

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“…rheology and optical properties [6]. However, studies on the phase diagrams of commercial LAS in aqueous systems have revealed that unlike typical surfactants, NaLAS molecules tend to form only micellar and lamellar phases due to its unique chemical structure and phenyl isomer distribution.…”

Section: Introductionmentioning

confidence: 99%

Liquid crystalline phases of linear alkylbenzene sulphonate in spray-dried detergent powders studied by small-angle X-ray scattering, TEM, and ATR-IR spectroscopy

Farshchi

Sadeghpour

Rappolt

et al. 2021

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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“…The organization of micelles has been investigated using various approaches, including electron microscopy ,− and small-angle scattering. ,,,,,,− Transmission electron microscopy (TEM) has been used to resolve the shapes, diameters ranging from 4 to 15 nm, and length scales ranging over several micrometers in colloidal systems. , While TEM provides direct imaging of micellar shapes, ,, the samples need to be frozen for imaging. The noninvasive characterization of the morphology and dimensions of the micelle aggregates is possible using small-angle X-ray scattering (SAXS) or small-angle neutron scattering (SANS) as a function of the temperature, − pH, and chemical environments. ,,,, The combination of real and reciprocal space imaging using SAXS and SANS analyses and the use of mathematical models can be used to delineate the structure and organization of micelles. ,, Advancements in operando and fast X-ray scattering measurements, particularly grazing incidence–small angle X-ray scattering (GI-SAXS) and transmission small angle X-ray scattering (transmission SAXS), now allow us to address critical knowledge gaps underlying surface-mediated organization of micelles .…”

Section: Introductionmentioning

confidence: 99%

Structure and Shape of Surface-Mediated Assembly of Surfactants

et al. 2021

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Achieving controls on the self-assembly of cationic and block copolymer micelles has significant implications for advancing novel material systems for energy, environmental, and biological applications and for tuning fluid flow behavior in subsurface geologic environments. While it is known that the aggregation of micelles is influenced by the composition of the surrounding fluid, the influence of a solid interface has been less explored. In this study, we probe the organization of cetyltrimethylammonium bromide (CTAB) micelles in the absence and presence of the Pluronic P123 block copolymer and quartz substrate using transmission and grazing-incidence small-angle X-ray scattering measurements and classical molecular dynamics (MD) simulations. In the absence of the quartz interface, CTAB with and without P123 molecules assemble as ellipsoid core–shell micelles. Densification of the core on adding P123 is noted from the decrease in the core radius from 15.9 to 14.6 Å. The presence of a quartz substrate causes the micelles to elongate, which is noted by the emergence of a power-law slope in the low q region (<0.02 Å–1). Moreover, in the presence of both P123 and the quartz substrate, the micelle shape changes from ellipsoid core–shell to cylindrical core–shell, and a significantly higher number of aggregates are formed. The higher number of aggregates, and faster aggregation kinetics are linked to the organization of the solvent structures as noted from the MD simulations. These findings demonstrate the effects of adding a block copolymer and including a quartz substrate on the self-assembly of cationic (CTAB) micelles, which can be used to inform the design of functional material systems that harness surfactant chemistries.

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Applications of small-angle X-ray scattering/small-angle neutron scattering and cryogenic transmission electron microscopy to understand self-assembly of surfactants

Cited by 26 publications

References 121 publications

Design and Characterization of Bio-inspired Antimicrobial Nanomaterials

Design and Characterization of Bio-inspired Antimicrobial Nanomaterials

Liquid crystalline phases of linear alkylbenzene sulphonate in spray-dried detergent powders studied by small-angle X-ray scattering, TEM, and ATR-IR spectroscopy

Structure and Shape of Surface-Mediated Assembly of Surfactants

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