The synthesis of Fe3O4@Au nanoparticles and the feasibility study of attaching them to the E. coli bacterial membrane.
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| Title: | The synthesis of Fe3O4@Au nanoparticles and the feasibility study of attaching them to the E. coli bacterial membrane. |
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| Authors: | Alavi, F.1 (AUTHOR) Fatemehalavi.bio96@gmail.com, Saievar-Iranizad, E.1 (AUTHOR) saievare@modares.ac.ir, Mohammadi, Sh Roudbar2 (AUTHOR) sh.mohammadi@modares.ac.ir |
| Source: | Materials Chemistry & Physics. Mar2026, Vol. 351, pN.PAG-N.PAG. 1p. |
| Subjects: | Iron oxide nanoparticles, Escherichia coli, Bacterial cell walls, Coprecipitation (Chemistry), Nanomedicine, Chemical synthesis, Magnetic fields, Biocompatibility |
| Abstract: | This study focuses on the feasibility study of attaching Fe 3 O 4 @Au nanoparticles (NPs) to the membrane of Escherichia coli (E. coli) bacteria. Among various NPs, Fe 3 O 4 nanoparticles were selected due to their high magnetic saturation. These NPs were synthesized with an average size of 16 nm using a co-precipitation method, and their saturation magnetization was 80 emu/g. To prevent aggregation and oxidation of the Fe 3 O 4 nanoparticles and to stabilize them, it was necessary to coat the nanoparticles. Among different metals, gold was chosen due to its high chemical stability, biocompatibility and non-toxic nature. Subsequently, the coating of Fe 3 O 4 @Au nanoparticles was carried out using a chemical reduction method with oleic amine and ascorbic acid as reducing agents. The resulting Fe 3 O 4 @Au nanoparticles had an average size of about 20 nm and a saturation magnetization of 60 emu/g. E. coli bacteria from a urine sample were cultured in MacConkey agar medium. Then, the optimal concentration of Fe 3 O 4 @Au nanoparticles (8 mg/L) was injected into the bacterial culture and subjected to TEM analysis. This study successfully demonstrated the attachment of Fe 3 O 4 @Au nanoparticles to the membrane of E. coli bacteria. Furthermore, the attached bacteria to the nanoparticles exhibited successful responses to an external magnetic field. The movement of E. coli bacteria in the magnetic field suggests that there are potential applications in targeted bacterial and cancer therapy. [Display omitted] • Fe 3 O 4 nanoparticles were synthesized with a size of about 16 nm. • Fe 3 O 4 @Au nanoparticles were synthesized with an average size of 20 nm. • Fe 3 O 4 @Au nanoparticles were successfully attached to E. coli bacteria membrane. • Bacteria-attached nanoparticles uniquely responded to an external magnetic field. [ABSTRACT FROM AUTHOR] |
| Copyright of Materials Chemistry & Physics is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 190715790 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: The synthesis of Fe3O4@Au nanoparticles and the feasibility study of attaching them to the E. coli bacterial membrane. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Alavi%2C+F%2E%22">Alavi, F.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> Fatemehalavi.bio96@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Saievar-Iranizad%2C+E%2E%22">Saievar-Iranizad, E.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> saievare@modares.ac.ir</i><br /><searchLink fieldCode="AR" term="%22Mohammadi%2C+Sh+Roudbar%22">Mohammadi, Sh Roudbar</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> sh.mohammadi@modares.ac.ir</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Materials+Chemistry+%26+Physics%22">Materials Chemistry & Physics</searchLink>. Mar2026, Vol. 351, pN.PAG-N.PAG. 1p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Iron+oxide+nanoparticles%22">Iron oxide nanoparticles</searchLink><br /><searchLink fieldCode="DE" term="%22Escherichia+coli%22">Escherichia coli</searchLink><br /><searchLink fieldCode="DE" term="%22Bacterial+cell+walls%22">Bacterial cell walls</searchLink><br /><searchLink fieldCode="DE" term="%22Coprecipitation+%28Chemistry%29%22">Coprecipitation (Chemistry)</searchLink><br /><searchLink fieldCode="DE" term="%22Nanomedicine%22">Nanomedicine</searchLink><br /><searchLink fieldCode="DE" term="%22Chemical+synthesis%22">Chemical synthesis</searchLink><br /><searchLink fieldCode="DE" term="%22Magnetic+fields%22">Magnetic fields</searchLink><br /><searchLink fieldCode="DE" term="%22Biocompatibility%22">Biocompatibility</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: This study focuses on the feasibility study of attaching Fe 3 O 4 @Au nanoparticles (NPs) to the membrane of Escherichia coli (E. coli) bacteria. Among various NPs, Fe 3 O 4 nanoparticles were selected due to their high magnetic saturation. These NPs were synthesized with an average size of 16 nm using a co-precipitation method, and their saturation magnetization was 80 emu/g. To prevent aggregation and oxidation of the Fe 3 O 4 nanoparticles and to stabilize them, it was necessary to coat the nanoparticles. Among different metals, gold was chosen due to its high chemical stability, biocompatibility and non-toxic nature. Subsequently, the coating of Fe 3 O 4 @Au nanoparticles was carried out using a chemical reduction method with oleic amine and ascorbic acid as reducing agents. The resulting Fe 3 O 4 @Au nanoparticles had an average size of about 20 nm and a saturation magnetization of 60 emu/g. E. coli bacteria from a urine sample were cultured in MacConkey agar medium. Then, the optimal concentration of Fe 3 O 4 @Au nanoparticles (8 mg/L) was injected into the bacterial culture and subjected to TEM analysis. This study successfully demonstrated the attachment of Fe 3 O 4 @Au nanoparticles to the membrane of E. coli bacteria. Furthermore, the attached bacteria to the nanoparticles exhibited successful responses to an external magnetic field. The movement of E. coli bacteria in the magnetic field suggests that there are potential applications in targeted bacterial and cancer therapy. [Display omitted] • Fe 3 O 4 nanoparticles were synthesized with a size of about 16 nm. • Fe 3 O 4 @Au nanoparticles were synthesized with an average size of 20 nm. • Fe 3 O 4 @Au nanoparticles were successfully attached to E. coli bacteria membrane. • Bacteria-attached nanoparticles uniquely responded to an external magnetic field. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Materials Chemistry & Physics is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.matchemphys.2025.131932 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 1 StartPage: N.PAG Subjects: – SubjectFull: Iron oxide nanoparticles Type: general – SubjectFull: Escherichia coli Type: general – SubjectFull: Bacterial cell walls Type: general – SubjectFull: Coprecipitation (Chemistry) Type: general – SubjectFull: Nanomedicine Type: general – SubjectFull: Chemical synthesis Type: general – SubjectFull: Magnetic fields Type: general – SubjectFull: Biocompatibility Type: general Titles: – TitleFull: The synthesis of Fe3O4@Au nanoparticles and the feasibility study of attaching them to the E. coli bacterial membrane. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Alavi, F. – PersonEntity: Name: NameFull: Saievar-Iranizad, E. – PersonEntity: Name: NameFull: Mohammadi, Sh Roudbar IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 03 Text: Mar2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 02540584 Numbering: – Type: volume Value: 351 Titles: – TitleFull: Materials Chemistry & Physics Type: main |
| ResultId | 1 |
