Nanotechnology is an emerging interdisciplinary field of science that has been growing in several different areas over the past few decades. There are mainly two types of nanoparticles (NPs) that are discussed in the literature: the first one is natural nanoparticles (Al or Fe oxides/hydroxides, silicate clay minerals, humic organic matter including large biopolymers) that are released into the atmosphere because of natural processes such as forest fires, volcanic activities, soil erosion by wind and water, formation from clay minerals, weathering or dust storms from desert, 1, 2 and the second one is engineered nanoparticles. Engineered NPs are more significant, defined as man-made materials of particle sizes smaller than 100 nm in at least one dimension, 3, 4 similar to subcellular structures such as biological