Over the past few years, ZnO nanoparticles have attracted great attention due to their biocompatibility and low
cost. A number of investigations demonstrated their potential applications in biotechnology and biomedicine. This review
presents the current biological applications of ZnO nanoparticles, including biological imaging, drug releasing and
biosensing, as well as their advantages and limitations in these areas. In addition, the toxicity of ZnO nanoparticles is
discussed in comparison with other conventional nanoparticles.
Keywords: Bioimaging, biosensing, drug carrier, nanocrystals, toxicity, ZnO.
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