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.
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.
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], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=861409
(Accessed October 11, 2025)