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Magnetochemistry
Volume 8
Issue 11
10.3390/magnetochemistry8110143
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Article

Hydrophobic Magnetite Nanoparticles for Bioseparation: Green Synthesis, Functionalization, and Characterization

by
Vahid Alimohammadi
1,
Seyyed Ali Seyyed Ebrahimi
1,*,
Faezeh Kashanian
2,
Zahra Lalegani
1,
Mehran Habibi-Rezaei
2 and
Bejan Hamawandi
3,*
1
Advanced Magnetic Materials Research Center, School of Metallurgy and Materials, College of Engineering, University of Tehran, Tehran 111554563, Iran
2
School of Biology, College of Science, University of Tehran, Tehran 111554563, Iran
3
Department of Applied Physics, KTH Royal Institute of Technology, SE-106 91 Stockholm, Sweden
*
Authors to whom correspondence should be addressed.
Magnetochemistry 2022, 8(11), 143; https://doi.org/10.3390/magnetochemistry8110143
Submission received: 5 September 2022 / Revised: 21 October 2022 / Accepted: 26 October 2022 / Published: 28 October 2022
(This article belongs to the Special Issue Metal Oxide Nanoparticles: Synthesis, Characterization, and Application)
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Abstract

In this study, three types of hydrophobized alkyl-modified magnetic nanoparticles (MNPs) comprising direct alkylated-MNPs (A-MNPs), silica-mediated alkyl MNPs (A-SiMNPs), and arginine (Arg)-mediated alkyl MNPs (A-RMNPs) were synthesized successfully. For this purpose, the co-precipitation method was used to synthesize, and octadecyl trimethoxy silane (OTMS) was used as a functionalizing agent. Accordingly, the hydrophobic octadecyl moieties were connected to MNPs. The nanoparticles (NPs) were characterized by XRD, SEM, FTIR, CHN, DLS, and zeta potential analyses. The synthesized coated MNPs represented a decrease in surface charge and magnetization alongside increased surface hydrophobicity and size. It was revealed that the alkylation process was successfully performed to all three MNPs, but A-SiMNPs showed the highest hydrophobicity. Additionally, the novel A-RMNPs, as the most biocompatible type, and A-MNPs showed the highest magnetization among the synthesized MNPs. The results indicate that synthesized NPs can play an important role in bio applications. However, it was revealed that alkyl chains are easily connected to all three MNPs, and that A-MNPs contained the highest alkyl chains and could affect the re-folding and denaturation process of recombinant proteins.
Keywords: magnetite; hydrophobicity; alkyl chains magnetite; hydrophobicity; alkyl chains

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MDPI and ACS Style

Alimohammadi, V.; Seyyed Ebrahimi, S.A.; Kashanian, F.; Lalegani, Z.; Habibi-Rezaei, M.; Hamawandi, B. Hydrophobic Magnetite Nanoparticles for Bioseparation: Green Synthesis, Functionalization, and Characterization. Magnetochemistry 2022, 8, 143. https://doi.org/10.3390/magnetochemistry8110143

AMA Style

Alimohammadi V, Seyyed Ebrahimi SA, Kashanian F, Lalegani Z, Habibi-Rezaei M, Hamawandi B. Hydrophobic Magnetite Nanoparticles for Bioseparation: Green Synthesis, Functionalization, and Characterization. Magnetochemistry. 2022; 8(11):143. https://doi.org/10.3390/magnetochemistry8110143

Chicago/Turabian Style

Alimohammadi, Vahid, Seyyed Ali Seyyed Ebrahimi, Faezeh Kashanian, Zahra Lalegani, Mehran Habibi-Rezaei, and Bejan Hamawandi. 2022. "Hydrophobic Magnetite Nanoparticles for Bioseparation: Green Synthesis, Functionalization, and Characterization" Magnetochemistry 8, no. 11: 143. https://doi.org/10.3390/magnetochemistry8110143

APA Style

Alimohammadi, V., Seyyed Ebrahimi, S. A., Kashanian, F., Lalegani, Z., Habibi-Rezaei, M., & Hamawandi, B. (2022). Hydrophobic Magnetite Nanoparticles for Bioseparation: Green Synthesis, Functionalization, and Characterization. Magnetochemistry, 8(11), 143. https://doi.org/10.3390/magnetochemistry8110143

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