Ali TH, Mandal AM, Heidelberg T, Duali Hussen RS, Goh EW. Ionic magnetic core-shell nanoparticles for DNA extraction.
RSC Adv 2020;
10:38818-38830. [PMID:
35518431 PMCID:
PMC9057385 DOI:
10.1039/d0ra05933a]
[Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Accepted: 10/16/2020] [Indexed: 11/21/2022] Open
Abstract
Magnetic nanoparticles with specific surface features are interesting materials for biomedical applications. The combination of molecular interactions on small particles with macroscopic cohesion forces offers unique opportunities. This work reports the synthesis of magnetic core-shell nanoparticles with alkylimidazolium coated surface for effective DNA extraction. A magnetic Fe2O3 core was coated with a silica shell and functionalized with an organic halide. This enabled a surface coating with organic cations to mediate effective molecular interactions with polyanionic DNA. The large surface area of the ∼20 nm small particles with a magnetization of 25 emu g-1 enabled high DNA particle loading of 1/30 m% with easy isolation based on an external magnetic field. Moreover, the coating of the particles stabilized DNA against ultrasound initiated fragmentation.
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