Using neutral impact collision ion scattering spectroscopy and angular resolved X-ray photoelectron spectroscopy to analyze surface structure of surfactant solutions

Wang, Chuangye; Kan, Aiting; Liu, Zhen; Zhang, Guodong; Lin, Xufeng; Fu, Hui

doi:10.1007/s00396-015-3541-8

Cited by 2 publications

(3 citation statements)

References 25 publications

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“…For example, at 2 nm from the interface, the potential predicted by the BW model is −86 mV, while the KR model gives −59 mV, which is significantly lower than −115 mV, as predicted by our model. Consequently, the concentration of the surfactant ion outside of the adsorption layer predicted by those two traditional models is much lower than the bulk concentration at 2 nm from the air–water interface, which contradicts experimental and simulation results. ,,, Our model has the slowest surface potential decrease from the air–water interface. Also, only our model gives a continuous change in surfactant concentration.…”

Section: Resultscontrasting

confidence: 65%

“…Consequently, the concentration of the surfactant ion outside of the adsorption layer predicted by those two traditional models is much lower than the bulk concentration at 2 nm from the air−water interface, which contradicts experimental and simulation results. 1,3,60,61 Our model has the slowest surface potential decrease from the air− water interface. Also, only our model gives a continuous change in surfactant concentration.…”

Section: Model Of Ion Distribution At the Air−water Interfacementioning

confidence: 87%

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Surface Potential Explained: A Surfactant Adsorption Model Incorporating Realistic Layer Thickness

et al. 2020

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Soluble surfactants form thick adsorption layers at the air–liquid interface, but classical adsorption models fail to account for it as they treat the adsorption layer as a mathematical plane (of zero thickness). This simplification has produced several inconsistencies between theoretical predictions and experimental results, especially for the surface potential. Here, we develop a new adsorption model for ionic surfactants at the air–water interface that incorporates the effect of the adsorption layer thickness using a modified Poisson–Boltzmann equation that integrates information from molecular dynamics simulation. We show that the surface potential depends sensitively on both the thickness of the adsorption layer and the interfacial depth at which the surface potential is probed. This model, therefore, provides a much more accurate picture of the surface potential than classical models.

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Section: Resultscontrasting

confidence: 65%

Section: Model Of Ion Distribution At the Air−water Interfacementioning

confidence: 87%

Surface Potential Explained: A Surfactant Adsorption Model Incorporating Realistic Layer Thickness

et al. 2020

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“…The first type of loss process is elastic energy loss, which enables the determination of the mass of the elements. The other type of loss process is inelastic energy loss, whereby the projectiles lose energy on their trajectory through the bulk by low angle scattering and electronic excitations (stopping power) [ 60 ]. This type of loss can be used to determine the concentration depth profiles of the elements in the sample because it governs the depth travelled by the projectiles, provided the target atom is heavier than the projectile.…”

Section: Experimental Procedure: Materials and Device Fabricationmentioning

confidence: 99%

Modification of the Surface Composition of PTB7-Th: ITIC Blend Using an Additive

et al. 2022

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We investigated the effect of adding p-anisaldehyde (AA) solvent to the ink containing poly[[2,60-4,8-di(5-ethylhexylthienyl)benzo[1,2-b:3,3-b]dithiophene][3-fluoro-2[(2-ethylhexyl)carbonyl]thieno[3,4-b]thiophenediyl]](PTB7-Th) and 3,9-bis(2-methylene-(3-(1,1-dicyanomethylene)-indanone))-5,5,11,11-tetrakis(4-hexylphenyl)-dithieno[2,3-d:20,30-d0]-s-indaceno[1,2-b:5,6-b0]-dithiophene(ITIC) on the morphology of the active layer. The present study focuses on determining the effect of the additive on the compositions at the surface of the PTB7-Th: ITIC composite and its morphology, forming one side of the interface of the blend with the MoOX electrode, and the influence of the structural change on the performance of devices. Studies of device performance show that the addition of the additive AA leads to an improvement in device performance. Upon the addition of AA, the concentration of PTB7-Th at the surface of the bulk heterojunction (BHJ) increases, causing an increase in surface roughness of the surface of the BHJ. This finding contributes to an understanding of the interaction between the donor material and high work function electrode/interface material. The implications for the interface are discussed.

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Using neutral impact collision ion scattering spectroscopy and angular resolved X-ray photoelectron spectroscopy to analyze surface structure of surfactant solutions

Cited by 2 publications

References 25 publications

Surface Potential Explained: A Surfactant Adsorption Model Incorporating Realistic Layer Thickness

Surface Potential Explained: A Surfactant Adsorption Model Incorporating Realistic Layer Thickness

Modification of the Surface Composition of PTB7-Th: ITIC Blend Using an Additive

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