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Keywords:

  • biosynthesis;
  • droplet microfluidics;
  • homogeneity;
  • magnetic properties;
  • nanoparticles
Thumbnail image of graphical abstract

All under control: A microfluidic droplet generator uniformly encapsulates an equivalent number of engineered E. coli cells and the same Fe and Mn metal ion concentrations in identically sized droplets. The synthesized biogenic FeMn paramagnetic nanoparticles inside the cells are eco-friendly and cost-effective.