MEASURING AEROSOLS Using a computer program to measure aerosol particles collected on Pico BeforeAfter Results (Measurements)

Soot looks like tiny round particles stuck together When first emitted, soot particles are small and elongated As they travel, they become more round and compact At Pico – very compacted = more aged (travelled long distances) WHAT HAPPENS TO SOOT AS IT TRAVELS?

S. China, MTU

How is the filter prepared for the microscope? Describe the scanning electron microscope. VIDEO NOTES:

VIDEO: HOW AEROSOL PARTICLES ARE PHOTOGRAPHED Click here for the video!!here

Measure the particles you classified yesterday 1.Measure scale (500 nm = _____ cm) on each image 2.Carefully measure the perimeter, maximum length and maximum width. 3.Convert measurements to nanometers using the conversion from the scale. 4.Convert measurements so they all have the same units(1000 nm = 1.00 µm) Tell the story of particles 2, 9, 11, 12 MEASURING PARTICLES