Aptamer Clicked Poly(ferrocenylsilanes) at Au Nanoparticles as Platforms with Multiple Function - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Chemistry - A European Journal Année : 2024

Aptamer Clicked Poly(ferrocenylsilanes) at Au Nanoparticles as Platforms with Multiple Function

Tibor Halmagyi
Nizar Alsharif
Mohamed Berkal
Mark Hempenius
  • Fonction : Auteur
Istvan Szilagyi
G. Julius Vancso
  • Fonction : Auteur correspondant
  • PersonId : 1075991

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Résumé

Abstract Aptamers are widely used in biosensing due to their specific sensitivity toward many targets. Thus, gold nanoparticle (AuNP) aptasensors are subject to intense research due to the complementary properties of aptamers as sensing elements and AuNPs as transducers. We present herein a novel method for the functional coupling of thrombin‐specific aptamers to AuNPs via an anionic, redox‐active poly(ferrocenylsilane) (PFS) polyelectroyte. The polymer acts as a co‐reductant and stabilizer for the AuNPs, provides grafting sites for the aptamer, and can be used as a redox sensing element, making the aptamer‐PFS‐AuNP composite (aptamer‐AuNP) a promising model system for future multifunctional sensors. The aptamer‐AuNPs exhibit excellent colloidal stability in high ionic strength environments owing to the combined electrosteric stabilizing effects of the aptamer and the PFS. The synthesis of each assembly element is described, and the colloidal stability and redox responsiveness are studied. As an example to illustrate applications, we present results for thrombin sensitivity and specificity using the specific aptamer.
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Dates et versions

hal-04498332 , version 1 (11-03-2024)

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Tibor Halmagyi, Nizar Alsharif, Mohamed Berkal, Mark Hempenius, Istvan Szilagyi, et al.. Aptamer Clicked Poly(ferrocenylsilanes) at Au Nanoparticles as Platforms with Multiple Function. Chemistry - A European Journal, In press, ⟨10.1002/chem.202303979⟩. ⟨hal-04498332⟩
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