Nanoparticle Staircase (2 of 2) (video) National Institute of Standards and Technology (NIST) Share Print E-Mail Loading video... Caption Fluorescent nanoparticles separate by size in a nanofluidic staircase machined with subnanometer precision. Credit NIST Usage Restrictions Please credit NIST when using this video. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.