The internal structure of a rodlike micelle

Herbst, Leandra; Kalus, J.; Schmelzer, U.

doi:10.1021/j100131a056

Cited by 16 publications

(19 citation statements)

References 6 publications

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“…In scattering experiments involving systems of rod-like micelles, they are in most cases treated as simple cylinders with at ends, thus ignoring the presence of the end-caps (Herbst et al, 1993). Given the relevance of the globular end-caps discussed above, a closer look at their effect on the overall scattering picture is justi®ed.…”

Section: Introductionmentioning

confidence: 99%

Scattering from cylinders with globular end-caps

Kaya

2004

J Appl Cryst

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The scattering function and the radius of gyration of a cylinder with globular end‐caps (a barbell) are presented and discussed. The radius of the end‐caps is restricted to be bigger than or equal to that of the cylinder; hence the model is a generalization of the scattering function of a cylinder with hemispherical end‐caps. It is argued that the cylinder with globular end‐caps is a physically more representative model for rod‐like micelles. Moreover, the scattering functions of the simple sphere and the dumbbell are found to be special cases of the scattering function of the barbell. Numerical examples of the scattering curves and their pair distance distribution functions are presented.

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Section: Introductionmentioning

confidence: 99%

Scattering from cylinders with globular end-caps

Kaya

2004

J Appl Cryst

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“…This plateau value of viscosity is generally regarded as zero-shear viscosity ( η 0 ). With the increase of shear rate, viscosities become smaller and show remarkable shear-thinning phenomenon, which is the typical symbol of wormlike micelle formation [ 7 , 35 – 39 ]. While at high shear rates, the reduction of viscosities can be due to the alignment of wormlike micelles, which results in the shear-banding phenomenon [ 18 , 40 – 42 ].…”

Section: Resultsmentioning

confidence: 99%

The Study of a Novel Nanoparticle-Enhanced Wormlike Micellar System

et al. 2017

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In this work, a novel nanoparticle-enhanced wormlike micellar system (NEWMS) was proposed based on the typical wormlike micelles composed of cetyltrimethylammonium bromide (CTAB) and sodium salicylate (NaSal). In order to strengthen the structure of wormlike micelles, silica nanoparticles are used to design the novel nanoparticle-enhanced wormlike micelle. The stability and morphologies of silica nanoparticles were studied by dynamic light scattering (DLS) and transmission electron microscopy (TEM) at first. After the formation of NEWMS, the rheological properties were discussed in detail. The zero-shear viscosity of NEWMS increases with the addition of silica nanoparticles. Dynamic oscillatory measurements show the viscoelastic properties of NEWMS. Through comparison with the original wormlike micelles, the entanglement length and mesh size of NEWMS are nearly unchanged, while the contour length increases with the increase of silica concentration. These phenomena confirm the enhanced influence of silica nanoparticles on wormlike micelles. The formation mechanism of NEWMS, especially the interactions between wormlike micelles and nanoparticles, is proposed. This work can deepen the understanding of the novel NEWMS and widen their applications.

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“…We mention that for c ) 53.4 mM, the mean length 〈L〉 ) 15 nm) of the micelles is less than the mean distance of 21 nm between the micelles, which is characteristic for a dilute solution. 〈N〉 -N 0 ) prop c 1/2 (6) ( 〈N 2 〉 N -N 0) /(X -X 1 ) 1/2 ) exp((∆ -N 0 δ)/2k B T) 1-N 0 /2 ‚ (1 + 1/( + N 0 (1 -)))/( + N 0 (1 -)) 1/2 (7) …”

Section: Discussionmentioning

confidence: 99%

“…7 But according to our experimental facts, this is not necessary for our system within the experimental errors. Figure 1 we present the scattering intensities I for the different contrasts X as a function of Q.…”

Section: Theorymentioning

confidence: 92%

Determination of the Structure of Tetradecyldimethylaminoxide Micelles in Water by Small-Angle Neutron Scattering

Gorski

Kalus

1997

J. Phys. Chem. B

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By means of a small-angle neutron scattering experiment the radius R as well as the scattering length density of rodlike tetradecyldimethylaminoxide (TDMAO) micelles in D 2 O were determined. The micelles turned out to be homogeneous. As a function of the concentration c of TDMAO we found the mean aggregation number 〈N〉, which increases with c, and the value of two thermodynamic parameters describing the energy advantage by inserting a monomer in the end cap of the spherocylindrical micelles and in the cylindrical part, respectively.

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The internal structure of a rodlike micelle

Cited by 16 publications

References 6 publications

Scattering from cylinders with globular end-caps

Scattering from cylinders with globular end-caps

The Study of a Novel Nanoparticle-Enhanced Wormlike Micellar System

Determination of the Structure of Tetradecyldimethylaminoxide Micelles in Water by Small-Angle Neutron Scattering

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