Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Oscillations about an Equilibrium Position01:04

Oscillations about an Equilibrium Position

5.4K
Stability is an important concept in oscillation. If an equilibrium point is stable, a slight disturbance of an object that is initially at the stable equilibrium point will cause the object to oscillate around that point. For an unstable equilibrium point, if the object is disturbed slightly, it will not return to the equilibrium point. There are three conditions for equilibrium points—stable, unstable, and half-stable. A half-stable equilibrium point is also unstable, but is named so...
5.4K
Eccentric Axial Loading in a Plane of Symmetry01:16

Eccentric Axial Loading in a Plane of Symmetry

176
Eccentric axial loading occurs when an axial load is applied away from the centroidal axis of a structural member. This scenario is common in engineering, where structural elements may not be directly aligned due to various design or functional requirements.
176
Gauss's Law: Planar Symmetry01:27

Gauss's Law: Planar Symmetry

7.9K
A planar symmetry of charge density is obtained when charges are uniformly spread over a large flat surface. In planar symmetry, all points in a plane parallel to the plane of charge are identical with respect to the charges. Suppose the plane of the charge distribution is the xy-plane, and the electric field at a space point P with coordinates (x, y, z) is to be determined. Since the charge density is the same at all (x, y) - coordinates in the z = 0 plane, by symmetry, the electric field at P...
7.9K
Kepler's First Law of Planetary Motion01:10

Kepler's First Law of Planetary Motion

4.0K
In the early 17th century, German astronomer and mathematician Johannes Kepler postulated three laws for the motion of planets in the solar system. He formulated his first two laws based on the observations of his forebears, Nikolaus Copernicus and Tycho Brahe.
Polish astronomer Nikolaus Copernicus put forth a theory that stated a heliocentric model for the solar system. According to this heliocentric theory, all the planets, including Earth, orbit the Sun in circular orbits.
On the other hand,...
4.0K
Gauss's Law: Spherical Symmetry01:26

Gauss's Law: Spherical Symmetry

7.4K
A charge distribution has spherical symmetry if the density of charge depends only on the distance from a point in space and not on the direction. In other words, if the system is rotated, it doesn't look different. For instance, if a sphere of radius R is uniformly charged with charge density ρ0, then the distribution has spherical symmetry. On the other hand, if a sphere of radius R is charged so that the top half of the sphere has a uniform charge density ρ1 and the bottom half...
7.4K
IR Spectrum Peak Splitting: Symmetric vs Asymmetric Vibrations01:08

IR Spectrum Peak Splitting: Symmetric vs Asymmetric Vibrations

954
Identical bonds within a polyatomic group can stretch symmetrically (in-phase) or asymmetrically (out-of-phase). Similar to hydrogen bonding, these vibrations also influence the shape of the IR peak. Generally, asymmetric stretching frequencies are higher than symmetric stretching frequencies. For example, primary amines exhibit two distinct IR peaks between 3300–3500 cm−1 corresponding to the symmetric and asymmetric N-H stretching, while secondary amines exhibit a single...
954

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Conformational preorganization of neighbouring groups modulates and expedites polymer self-deconstruction.

Nature chemistry·2025
Same author

SAXS Assistant: Automated SAXS analysis for structural discovery in biologics and polymeric nanoparticles.

Biophysical journal·2025
Same author

Phosphorylation toggles the SARS-CoV-2 nucleocapsid protein between two membrane-associated condensate states.

Nature communications·2025
Same author

Martini 3 coarse-grained model of enzymes: Framework with validation by all-atom simulations and x-ray diffraction measurements.

The Journal of chemical physics·2025
Same author

Self-assembly of short biopeptides onto skin tissue components studied using QCM-D.

International journal of cosmetic science·2025
Same author

Assessment of Linear and Cyclic Peptides' Immobilization onto Cross-Linked, Poly(vinyl alcohol)/Cellulose Nanocrystal Nanofibers Electrospun over Quartz Crystal Microbalances with Dissipation Sensors.

Langmuir : the ACS journal of surfaces and colloids·2024

Related Experiment Video

Updated: Jun 17, 2025

Analysis of SEC-SAXS data via EFA deconvolution and Scatter
10:59

Analysis of SEC-SAXS data via EFA deconvolution and Scatter

Published on: January 28, 2021

9.0K

Evolution of elliptical SAXS patterns in aligned systems.

N Sanjeeva Murthy1, David T Grubb2

  • 1Rutgers University, New Brunswick, New JerseyUSA.

Journal of Applied Crystallography
|August 7, 2024
PubMed
Summary

Small-angle scattering reveals elliptical patterns in polymers and liquid crystals due to imperfect lamellar structures. This analysis provides insights into microstructural parameters like chain slip and stack orientation.

Keywords:
aligned objectselliptical traceslamellar arrayssemicrystalline polymerssmall-angle X-ray scattering

More Related Videos

Online Size-exclusion and Ion-exchange Chromatography on a SAXS Beamline
11:09

Online Size-exclusion and Ion-exchange Chromatography on a SAXS Beamline

Published on: January 5, 2017

17.3K
Structural Studies of Macromolecules in Solution using Small Angle X-Ray Scattering
07:19

Structural Studies of Macromolecules in Solution using Small Angle X-Ray Scattering

Published on: November 5, 2018

12.6K

Related Experiment Videos

Last Updated: Jun 17, 2025

Analysis of SEC-SAXS data via EFA deconvolution and Scatter
10:59

Analysis of SEC-SAXS data via EFA deconvolution and Scatter

Published on: January 28, 2021

9.0K
Online Size-exclusion and Ion-exchange Chromatography on a SAXS Beamline
11:09

Online Size-exclusion and Ion-exchange Chromatography on a SAXS Beamline

Published on: January 5, 2017

17.3K
Structural Studies of Macromolecules in Solution using Small Angle X-Ray Scattering
07:19

Structural Studies of Macromolecules in Solution using Small Angle X-Ray Scattering

Published on: November 5, 2018

12.6K

Area of Science:

  • Materials Science
  • Polymer Physics
  • Liquid Crystals

Background:

  • Semicrystalline polymers and liquid crystals exhibit complex scattering patterns.
  • Small-angle X-ray and neutron scattering (SAXS and SANS) reveal structural details.
  • Ordered assemblies and uncorrelated structures contribute to scattering profiles.

Purpose of the Study:

  • To analyze the distinct SAXS patterns observed in imperfectly ordered lamellar systems.
  • To model the formation of elliptical scattering trajectories from lamellar stacks.
  • To extract microstructural parameters from scattering data.

Main Methods:

  • Analysis of four distinct SAXS patterns: two-point 'banana', four-point, 'eyebrow', and 'butterfly'.
  • Modeling of lamellar stacks with chain slip, stack rotation, and interlamellar shear.
  • Separation of central diffuse scattering (CDS) into isotropic and oriented components.
  • Fitting of scattering data using elliptical coordinates.

Main Results:

  • Observed SAXS patterns exhibit elliptical intensity contours, not circular or linear.
  • Modeling confirms that chain slip and stack rotation/shear generate these elliptical patterns.
  • Deformed CDS forms equatorial streaks with shapes like oval, diamond, or propeller.
  • Analysis yields lamellar spacing, interlamellar shear angle (α), chain slip angle (ϕ), and stack size distribution.

Conclusions:

  • Elliptical scattering analysis provides a robust method for characterizing imperfect lamellar structures.
  • SAXS and SANS, combined with modeling, allow rapid refinement of microstructural parameters.
  • The study offers a quantitative approach to understanding polymer and liquid crystal deformation.