Figure 2From: Rat pulmonary responses to inhaled nano-TiO2: effect of primary particle size and agglomeration state NP aerosol agglomerate structure observed by transmission electron microscopy. Air samples were collected on pre-carbon coated Formvar copper grids glued onto 25-mm polycarbonate filters. Characterization (shape, agglomeration degree and structure) of the nano-aerosols was performed by TEM.Back to article page