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TEM image of Salmonella Enteritidis and platinum (Pt) nanoparticles: a) control; b, c, and d) the same cell of Salmonella Enteritidis with Pt nanoparticles. Arrows point to nano-Pt (b); and the spots observed with increasing magnification (b, c, and d). Black spots are seen evaporating under the microscope electron beam and are finally seen as white spots.
