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. Author manuscript; available in PMC: 2016 Mar 7.
Published in final edited form as: Environ Sci Technol. 2015 Jun 25;49(13):8048–8056. doi: 10.1021/acs.est.5b01214

Figure 5.

Figure 5

BFTEM images of AgNWs showing the generation of a secondary population of nanoparticles. (a) Small nanoparticles were formed at the surface of AgNWs after incubation in pH 7 perchlorate buffers for 24 hours. (b) The magnification of the boxed area in (a) shows that the particles formed are trapped in the PVP capping layer of AgNWs. (c) AgNWs incubated at pH 7 for 1 week. A larger amount of nanoparticles was observed, close to the surface of AgNWs and in several areas of the carbon coating of the TEM grid. (d) AgNWs incubated at pH5 for 7 days. (e) AgNWs incubated at pH7 in the presence of DPPC for 24 hours. The amorphous layer around the AgNWs corresponds to the phospholipid wrapping of the wires. (f) The magnification of the boxed area in (e) shows that crystalline nanoparticles are present inside the phospholipid coating.