Figure 6From: Oral absorption of PEG-coated versus uncoated gold nanospheres: does agglomeration matter? Energy-dispersive X-ray spectroscopy. Energy-dispersive X-ray spectroscopy of 23 nm uncoated gold nanoparticles in the cecum 4 hours following oral gavage. The presence of peaks from Al and Cu originate from the specimen holder and grid respectively.Back to article page