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Assessment of colloidal stability under five different solutions: deionized water, NaCl (0.9%), phosphate-buffered saline (PBS) (pH 7.4), Dulbecco’s modified Eagle’s medium (DMEM), and full medium. (A) UV-visible spectra of TF-AgNPs, (B) digital images of colloidal TF-AgNPs in (A) spectra, (C) UV-visible spectra of TF-AuNPs and (D) digital images of colloidal TF-AuNPs in (C) spectra.
