Small-angle neutron scattering at fractal objects

Iashina, E. G.; Grigoriev, S. V.

doi:10.1134/s1027451017040334

Cited by 16 publications

(4 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It was shown earlier (Iashina et al, 2017b;Iashina & Grigoriev, 2017) that exponential decay of the SESANS correlation function corresponds to the logarithmic correlation function (logarithmic fractal) which was previously detected using the cubic law of scattering intensity I(Q) = Q À3 in SANS (Iashina et al, 2021).…”

Section: Resultsmentioning

confidence: 75%

“…The details of the integration of equation ( 9) are presented by Iashina & Grigoriev (2017). After integration and normalization procedures the expression for the SESANS correlation function of a fractal object is given by…”

Section: Sesans From Fractal Objectsmentioning

confidence: 99%

“…close to 3) at the scale from 400 to 1500 nm. An exponent close to 3 was interpreted as a special type of matter organization -the logarithmic fractal (Iashina & Grigoriev, 2017;Iashina et al, 2017b. Independent SESANS measurements give the spin-echo correlation function, which is well described by the exponential decay G(z) = expðÀz=Þ with the correlation length = 3700 nm in a range of spin-echo length z from 300 nm to 12 000 mm.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Time-of-flight spin-echo small-angle neutron scattering applied to biological cell nuclei

Iashina,

Bouwman,

Duif

et al. 2023

J Appl Crystallogr

View full text Add to dashboard Cite

The organization of chromatin in the nuclei of rat lymphocyte was studied by time-of-flight spin-echo small-angle neutron scattering (ToF-SESANS). The procedures of the measurements in ToF and monochromatic SESANS modes were compared. It is shown that the sensitivity of the ToF method is significantly higher than that of the monochromatic mode. As a result, the SESANS correlation function can always be extracted from the ToF measurement of polarization, while this is not always the case with the monochromatic mode. The applicability of SESANS to fractal objects at the micrometre scale is demonstrated. The SESANS correlation function is well fitted by the exponential decay G(z) = exp(−z/ξ) with the correlation length ξ = 3.7 ± 0.1 µm. The exponential decay of the SESANS correlation function can be connected to the logarithmic correlation function γ(r) = ln(r/ξ) and the cubic law of the scattering intensity I(Q) = Q −3, which is in agreement with the concept of scattering from fractal objects. This finding is interpreted as evidence of a very specific logarithmic fractal structure of the large-scale organization of chromatin. The model of the logarithmic fractal is visualized as a hierarchical object obeying the volume-conservation principle at different scales.

show abstract

Section: Resultsmentioning

confidence: 75%

Section: Sesans From Fractal Objectsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Time-of-flight spin-echo small-angle neutron scattering applied to biological cell nuclei

Iashina,

Bouwman,

Duif

et al. 2023

J Appl Crystallogr

View full text Add to dashboard Cite

show abstract

“…The SAXS curves (dependences of the scattering intensity I on the momentum transfer q) for composites in the form of suspensions are shown in Fig. Sample of the initial GO (suspension of initial graphene oxide) has a scattering curve specified by the exponential function (straight line in double logarithmic scales) I(q) ∝ q −D , which corresponds to scattering from fractal objects [32][33][34]. The exponent power factor D (slope of the curve) is 2, which corresponds to scattering from the lamellar graphene platelets and indicates their strictly flat structure.…”

Section: Structure Of Go−dnd(ζ -) and Go−dnd(ζ +) Composites In The F...mentioning

confidence: 99%

Influence of the sign of the zeta potential of nanodiamond particles on the morphology of graphene-detonation nanodiamond composites in the form of suspensions and aerogels

et al. 2022

View full text Add to dashboard Cite

A new method of using the detonation nanodiamond with positive and negative zeta potential as a spacer for aerogels based on graphene oxide is presented. It is shown that the dosed addition of detonation nanodiamonds' particles to the suspension of graphene oxide hydrosol made it possible to triple the specific surface area of the resulting aerogel compared to graphene oxide aerogel, and this effect is more significant when nanodiamonds with a positive zeta potential are used. It was also shown that aerogels derived from graphene oxide and detonation nanodiamond with a positive zeta potential have a specific morphology with graphene oxide platelets being twisted. This effect is discussed in terms of the change in the average zeta potential of the initial mixtures. Keywords: two-component systems, carbon materials, colloid chemistry.

show abstract