Soot Particles (image) DOE/Los Alamos National Laboratory Caption These images show the mixing and classification of soot particles. The field-emission scanning electron microscope images of four different categories of soot particles are: (a) embedded, (b) partly coated, (c) bare and (d) with inclusions. Approximately 50 percent of the ambient soot particles are embedded, 34 percent are partly coated and 12 percent have inclusions. Only 4 percent of the particles are bare soot (not coated or very thinly coated). Scale bars, 500 nm. Right, spherical tar balls dominate in the emissions. Credit Los Alamos National Laboratory Usage Restrictions None 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.