Skip to main content
U.S. flag

An official website of the United States government

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.

Screening Candidates for 30 nm Spheres



Michelle K. Donnelly, Jiann C. Yang


This paper describes the preliminary screening process that was conducted to identify potential candidate particles to be used as the NIST Standard Reference Material (SRM) 30 nm spheres. Five different samples were obtained and measured using the NIST particle calibration facility. The sample with the most narrow size distribution and a preliminary peak particle diameter of 30.1 nm was identified as a potential candidate to become the NIST 30 nm SRM. A secondary candidate, with a fairly narrow distribution and a peak particle diameter of 24.2 nm was also identified. Further studies to address accuracy issues and ensure repeatability are recommended.
NIST Interagency/Internal Report (NISTIR) - 7345
Report Number


differential mobility analysis, nanosize, particle, SRM


Donnelly, M. and Yang, J. (2006), Screening Candidates for 30 nm Spheres, NIST Interagency/Internal Report (NISTIR), National Institute of Standards and Technology, Gaithersburg, MD, [online], (Accessed May 28, 2024)


If you have any questions about this publication or are having problems accessing it, please contact

Created August 1, 2006, Updated February 19, 2017