2002年9月

# Structure determination of helical fibers by numerical simulation for small-angle neutron scattering

LANGMUIR
• H Fukuda
• ,
• A Goto
• ,
• T Imae

18
19

7107

7114

DOI
10.1021/la025528r

AMER CHEMICAL SOC

Theoretical equations for the small-angle scattering of double-strand helixes with fanlike and round cross sections, as well as a cylinder, were applied to determine the geometry of the self-assembled helical structure formed by N-octadecanoyl-L-aspartic acid (C(18)Asp). However, those already-known equations were not sufficient to reproduce the experimental small-angle neutron scattering (SANS) curves. Then, a theoretical equation to the small-angle scattering for a helical fiber was derived. The equation with 5-fold integration covers the available equations for fibers with finite cross sections, but it is generalized so as to suit the multistrand helical structures with arbitrary cross-sectional shapes. Computer simulations based on this theory showed that the best fit to the observed SANS data of C(18)Asp fiber is obtained for a model of a single-strand helix with rectangular cross section, that is, the twisted ribbon.

Web of Science ® 被引用回数 : 6

リンク情報
DOI
https://doi.org/10.1021/la025528r
Web of Science