Effect of multiple scattering on SANS spectra from bicontinuous microemulsions

James A. Silas, Eric W. Kaler

Research output: Contribution to journalArticlepeer-review

32 Scopus citations


Small-angle neutron scattering is a powerful tool for investigating the microstructure of self-assembled systems. The domain length, d, and the correlation length, ξ, are two measures of bicontinuous microemulsions that are often determined from coherent SANS spectra. Some microemulsions scatter strongly, however, so measured spectra can contain multiple coherent scattering, and neglect of that multiple scattering can lead to incorrect values of d and ξ. In addition, multiple scattering can give rise to artifacts in the spectra, most notably an apparent scattering peak at twice the value of the scattering vector of the main peak. Here, changes in the SANS spectra from strongly scattering microemulsions and the parameters derived from them are reported as a function of relative scattering probability by varying both sample thickness and scattering contrast. A linear extrapolation of the results to zero scattering probability yields good estimates for the microstructural parameters, and the numerical procedure of Schelten and Schmatz is used to calculate the specific effects of multiple scattering on typical bicontinuous microemulsion scattering spectra.

Original languageEnglish (US)
Pages (from-to)291-298
Number of pages8
JournalJournal of Colloid And Interface Science
Issue number2
StatePublished - Jan 15 2003

Bibliographical note

Funding Information:
We are grateful for research support from Dow Corning. We acknowledge the support of the National Institute of Standards and Technology, U.S. Department of Commerce, in providing facilities used in this work.


  • Microemulsions
  • Multiple scattering


Dive into the research topics of 'Effect of multiple scattering on SANS spectra from bicontinuous microemulsions'. Together they form a unique fingerprint.

Cite this