 Nanoparticle tracking analysis is a technique used to measure the diffusion of nanoparticles in liquids. This technique has been improved by incorporating fibers into the system which allows for more accurate measurements of smaller particles than ever before. This paper demonstrates how the use of these fibers can be used to accurately measure particles as small as 9 nanometers, surpassing previous limits. This technique could have applications in areas such as drug delivery, nanoparticle growth, and controlling nanoparticles. This article was offered by Torsten Weiderwald, Ronny Forster, Mona Neeson, and others.