Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Nanoparticle Tracking Analysis (NTA) is a method for visualizing and analyzing particles in liquids that relates the rate of Brownian motion to particle size. The rate of movement is related only to the viscosity and temperature of the liquid, it is not influenced by particle density or refractive index. NTA allows the determination of a size distribution profile of small particles (10-1000nm) in liquid suspension. The technique is used in conjunction with an ultramicroscope which allows small particles in liquid suspension to be visualized moving under Brownian motion. Computer software is then be used to track particles' movements and subsequently estimate their hydro-dynamic radius, using the Stokes-Einstein equation.

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