NOTICE: Due to a lapse in annual appropriations, most of this website is not being updated. Learn more.
Form submissions will still be accepted but will not receive responses at this time. Sections of this site for programs using non-appropriated funds (such as NVLAP) or those that are excepted from the shutdown (such as CHIPS and NVD) will continue to be updated.
An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
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.
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, 2025)