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Facile Coating Strategy to Functionalize Inorganic Nanoparticles for Biosensing.


ABSTRACT: The use of inorganic nanoparticles (NPs) for biosensing requires that they exhibit high colloidal stability under various physiological conditions. Here, we report on a general approach to render hydrophobic NPs into hydrophilic ones that are ready for bioconjugation. The method uses peglyated polymers conjugated with multiple dopamines, which results in multidentate coordination. As proof-of-concept, we applied the coating to stabilize ferrite and lanthanide NPs synthesized by thermal decomposition. Both polymer-coated NPs showed excellent water solubility and were stable at high salt concentrations under physiological conditions. We used these NPs as molecular-sensing agents to detect exosomes and bacterial nucleic acids.

SUBMITTER: Park YI 

PROVIDER: S-EPMC5474933 | biostudies-literature | 2017 Jan

REPOSITORIES: biostudies-literature

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Facile Coating Strategy to Functionalize Inorganic Nanoparticles for Biosensing.

Park Yong Il YI   Kim Eunha E   Huang Chen-Han CH   Park Ki Soo KS   Castro Cesar M CM   Lee Hakho H   Weissleder Ralph R  

Bioconjugate chemistry 20161107 1


The use of inorganic nanoparticles (NPs) for biosensing requires that they exhibit high colloidal stability under various physiological conditions. Here, we report on a general approach to render hydrophobic NPs into hydrophilic ones that are ready for bioconjugation. The method uses peglyated polymers conjugated with multiple dopamines, which results in multidentate coordination. As proof-of-concept, we applied the coating to stabilize ferrite and lanthanide NPs synthesized by thermal decomposi  ...[more]

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