This communication addresses new inputs in the field of biosensing, diagnosis and theranostics by using engineered inorganic nanomaterials. We explore the use of gold nanoparticles (AuNPs), SuperParamagnetic Iron Oxide nanoparticles (SPIONs) and SPIONs decorated with AuNPs as new sensing nanoplatforms for cysteine. Another application concerns the targeting of extracellular vesicles. AuNPs are functionalized according to the biomarkers of interest. Raman, UV-Vis, XPS, DLS, zeta potential measurements, combined with SPR and TEM observations highlight grafting and colloidal stability at each step of the synthesis. Developments based on SPIONs as well as titanate nanotubes, as nanotheranostics tools, are also briefly presented.
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