4(%3)3 - Ecole nationale supérieure de chimie de Montpellier

The third class of the nano-objects is represented by Poly(styrene) latex beads (PS) whoseaverage mean diameter was calculated to be approx. 110 nm with a mono-modal size distribution(Figure – 3.5a) using Scanning Electron Microscopy images (Figure – 3.5b) and confirmed by PhotonCross Correlation Spectroscopy. The average mean diameter was calculated by measuring the diameterof individual particles in the SEM image and according to the following equation also known as DeBrouckere Mean Diameter 27 : = ……….. Eq. (3.1) Number of Particles252015105a)064 68 72 76 80 84 88 92 96 100 104 108 112 116 120 124 128 132 136Diameter (nm)Figure – 3.5: a) Monomodal size distribution obtained for Poly(styrene), b) Scanning Electron Microscopy image79