8.8.2 Dynamic properties of colloids (1) Brownian motion Robert Brown (1773-1858) Vitality? In 1827, the botanist Robert Brown published a study "a brief account on microscopic observation on the particles contained in the pollen of plant. He reported an irregular motion of pollen grains(1) Brownian motion In 1827, the botanist Robert Brown published a study “A brief account on microscopic observation on the particles contained in the pollen of plant”. He reported an irregular motion of pollen grains. Vitality? 8.8.2 Dynamic properties of colloids