Form Factor of Asymmetric Elongated Micelles: Playing
with Russian Dolls Has Never Been so Informative
- Publication date
- Publisher
Abstract
Scattering
techniques (i.e., static light scattering, small angle neutron scattering, or small angle X-ray scattering) are excellent
tools to study nanoscopic objects in solution. However, to interpret
the experimental data, one needs to use the appropriate form factor.
While recent progress has been made in the writing of form factors
for complex structures, there is still a need to develop a method
to evaluate the form factor of inhomogeneous elongated scatterers.
Here, we propose an approach based on the principle of “Russian
dolls”. Multiblock rods are represented as multi generations
of rods (mother, daughter, granddaughter, etc.), where each rod is
nested within the rod of the previous generation, like Russian dolls.
A shift parameter is used to introduce asymmetry in the rod along its
long axis. This approach not only allowed us to write the form factor
of multiblock rods, but it also gave us the possibility to account
for the polydispersity in length of each block and of the shift parameter.
Finally, we applied these equations to the case of a series of solutions
of triblock comicelles slightly polydisperse in length