Connecting soft x-ray anisotropy with local order in conjugated polymers

Joshua H. Litofsky, Enrique D. Gomez

Research output: Contribution to journalArticle

Abstract

Polarized resonant soft x-ray scattering (RSoXS) can leverage contrast between domains in mass, chemical bonds, and chain orientation to characterize polymer thin films. Although mass and chemical contrast can be predicted from the absorption spectra, the origins of orientational contrast are not fully understood. For example, in the case where one domain is crystalline, it is not obvious how the total crystallinity will affect the anisotropy. Using a simple calculation, we predict polarized RSoXS of model structures and compare with experiment. Through experiments and simulations, we demonstrate that scattering anisotropy is not monotonically related to local order but instead peaks when 50% of domains have aligned chains, i.e., when the sample is 50% crystalline.

Original languageEnglish (US)
Pages (from-to)1168-1173
Number of pages6
JournalMRS Communications
Volume9
Issue number4
DOIs
StatePublished - Jan 1 2019

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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