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Orientational Distribution Function of Aligned Elongated Molecules and Particulates Determined from Their Scattering Signature

Published

Author(s)

Guan-Rong Huang, Yangyang Wang, Changwoo Do, Yuya Shinohara, Takeshi Egami, Lionel Porcar, Yun Liu, Wei-Ren Chen

Abstract

We present a strategy for quantitatively evaluating the field-induced alignment of non-spherical particles using small angle scattering techniques. The orientational distribution function (ODF) is determined from the anisotropic scattering intensity via the scheme of real spherical harmonic expansion. Our developed approach is simple, analytical and does not require a presumptive hypothesis of ODF as an input in data analysis. A model study of aligned rigid rods demonstrates the validity of this proposed approach to facilitate the quantitative structural characterization of materials with preferred orientational states.
Citation
ACS Macro Letters
Volume
8
Issue
10
Pub Type
Journals

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Keywords

small angle neutron scattering, orientation
Materials

Citation

Huang, G. , Wang, Y. , Do, C. , Shinohara, Y. , Egami, T. , Porcar, L. , Liu, Y. and Chen, W. (2019), Orientational Distribution Function of Aligned Elongated Molecules and Particulates Determined from Their Scattering Signature, ACS Macro Letters, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=928581 (Accessed October 8, 2024)

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Created October 14, 2019, Updated October 12, 2021