Beilstein J. Nanotechnol.2014,5, 2007–2015, doi:10.3762/bjnano.5.209
nanoparticles are highly sensitive towards phosphate ions even at pH 7. Buffer solutions and cell culture media containing phosphate ions are able to destroy ZnO nanoparticles within a time span from less than one hour to one day. The driving force of the reaction is the formation of zincphosphate of very low
account when assessing the biological effects or the toxicology of zinc oxide nanoparticles.
Keywords: degradation; phosphate; silica shell; zinc oxide nanoparticles; zincphosphate; Introduction
Crystalline nanoparticles of the semiconductor zinc oxide (ZnO-NP) show a broad fluorescence band in the
that zinc oxide can react with phosphoric acid to form various zinc phosphates which have applications, e.g., as dental cement [2]. Zincphosphate can also be used as corrosion inhibitor for metals as it forms a protecting layer on metal surfaces [3]. This usage is possible because of the low
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Figure 1:
Left: ZnO-NP prepared by the acidic procedure (sample 1, without labelling; scale bar: 50 nm). Righ...