Nanoparticle‐imprinted matrices (NAIMs) were prepared using ammonium‐terminated SiO2 nanoparticles (NPs) as templates initially attached to activated glassy carbon. After electrodeposition of a matrix of polyplumbagin and polyphenol, the selectivity of the polymer matrix was tuned towards the ligand shell of the Au analyte NPs by conjugate addition of substituted thiols to the plumbagin moiety within the matrix. The reactions were followed by cyclic voltammetry (CV) and the presence of thiols and amino groups in the film was verified by X‐ray photoelectron spectroscopy (XPS). After dissolution of the template NPs, the matrix had complementary cavities for the uptake of Au NPs. The amount of Au NP inside the cavities was quantified by the charge transferred during electrodissolution of the Au NPs in 3 M KCl in linear sweep voltammetry, which depended on the covalent modification of the polyplumbagin matrix, the pH during uptake and the size of the Au analyte NPs. The NAIM system modified with 1,2‐ethanedithiol showed the best uptake with 9.6×107 NPs cm−2 at pH 10, which is five times higher than the uptake of the same matrix at pH 5. In contrast, the cysteamine‐modified NAIM exhibited the highest uptake at pH 5.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.