Hollow Iron Oxide Nanospheres Obtained through a Combination of Atomic Layer Deposition and Electrospraying Technologies
In the present study, we report on the successful synthesis of hollow iron oxide nanospheres. The hollow Fe<sub>3</sub>O<sub>4</sub> nanospheres were synthesized following a four-step procedure: electrospraying spherical PVP particles, coating these particles with alumina (Al...
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| Format: | Article |
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MDPI AG
2022-09-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/12/18/3180 |
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| author | Paulina Márquez Cristian Patiño Vidal Alejandro Pereira Leonardo Vivas Juan Luis Palma Carol López de Dicastillo Juan Escrig |
| author_facet | Paulina Márquez Cristian Patiño Vidal Alejandro Pereira Leonardo Vivas Juan Luis Palma Carol López de Dicastillo Juan Escrig |
| author_sort | Paulina Márquez |
| collection | DOAJ |
| description | In the present study, we report on the successful synthesis of hollow iron oxide nanospheres. The hollow Fe<sub>3</sub>O<sub>4</sub> nanospheres were synthesized following a four-step procedure: electrospraying spherical PVP particles, coating these particles with alumina (Al<sub>2</sub>O<sub>3</sub>) and hematite (Fe<sub>2</sub>O<sub>3</sub>) through atomic layer deposition and, finally, a thermal reduction process to degrade the polymer (PVP) and convert hematite (Fe<sub>2</sub>O<sub>3</sub>) into magnetite (Fe<sub>3</sub>O<sub>4</sub>). A structural analysis using X-ray diffraction (XRD) confirmed the effectiveness of the thermal reduction process. A morphological analysis confirmed that the four-step procedure allowed for the obtainment of hollow iron oxide nanospheres, even though the reduction process caused a contraction in the diameter of the particles of almost 300 nm, but did not affect the thickness of the walls of the hollow spheres that remained at approximately 15 nm. Magnetic properties of the hollow iron oxide nanospheres enable their use in applications where the agglomeration of magnetic nanostructures in liquid media is commonly not allowed, such as in drug encapsulation and delivery. |
| first_indexed | 2024-03-09T22:57:57Z |
| format | Article |
| id | doaj.art-3a6074766c5540b69ec8efabb678f701 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-09T22:57:57Z |
| publishDate | 2022-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-3a6074766c5540b69ec8efabb678f7012023-11-23T18:06:53ZengMDPI AGNanomaterials2079-49912022-09-011218318010.3390/nano12183180Hollow Iron Oxide Nanospheres Obtained through a Combination of Atomic Layer Deposition and Electrospraying TechnologiesPaulina Márquez0Cristian Patiño Vidal1Alejandro Pereira2Leonardo Vivas3Juan Luis Palma4Carol López de Dicastillo5Juan Escrig6School of Engineering, Central University of Chile, Santiago 8330601, ChileCenter for the Development of Nanoscience and Nanotechnology (CEDENNA), Santiago 9170124, ChileDepartament of Sciences, Faculty of Liberal Arts, Adolfo Ibañez University, Santiago 7941169, ChileDepartment of Physics, University of Santiago de Chile (USACH), Santiago 9170124, ChileSchool of Engineering, Central University of Chile, Santiago 8330601, ChilePackaging Laboratory, Institute of Agrochemistry and Food Technology (IATA-CSIC), 46980 Paterna, SpainCenter for the Development of Nanoscience and Nanotechnology (CEDENNA), Santiago 9170124, ChileIn the present study, we report on the successful synthesis of hollow iron oxide nanospheres. The hollow Fe<sub>3</sub>O<sub>4</sub> nanospheres were synthesized following a four-step procedure: electrospraying spherical PVP particles, coating these particles with alumina (Al<sub>2</sub>O<sub>3</sub>) and hematite (Fe<sub>2</sub>O<sub>3</sub>) through atomic layer deposition and, finally, a thermal reduction process to degrade the polymer (PVP) and convert hematite (Fe<sub>2</sub>O<sub>3</sub>) into magnetite (Fe<sub>3</sub>O<sub>4</sub>). A structural analysis using X-ray diffraction (XRD) confirmed the effectiveness of the thermal reduction process. A morphological analysis confirmed that the four-step procedure allowed for the obtainment of hollow iron oxide nanospheres, even though the reduction process caused a contraction in the diameter of the particles of almost 300 nm, but did not affect the thickness of the walls of the hollow spheres that remained at approximately 15 nm. Magnetic properties of the hollow iron oxide nanospheres enable their use in applications where the agglomeration of magnetic nanostructures in liquid media is commonly not allowed, such as in drug encapsulation and delivery.https://www.mdpi.com/2079-4991/12/18/3180magnetic propertieshollow nanospheresatomic layer depositionhematite (Fe<sub>2</sub>O<sub>3</sub>)magnetite (Fe<sub>3</sub>O<sub>4</sub>)poly(vinylpyrrolidone) (PVP) |
| spellingShingle | Paulina Márquez Cristian Patiño Vidal Alejandro Pereira Leonardo Vivas Juan Luis Palma Carol López de Dicastillo Juan Escrig Hollow Iron Oxide Nanospheres Obtained through a Combination of Atomic Layer Deposition and Electrospraying Technologies Nanomaterials magnetic properties hollow nanospheres atomic layer deposition hematite (Fe<sub>2</sub>O<sub>3</sub>) magnetite (Fe<sub>3</sub>O<sub>4</sub>) poly(vinylpyrrolidone) (PVP) |
| title | Hollow Iron Oxide Nanospheres Obtained through a Combination of Atomic Layer Deposition and Electrospraying Technologies |
| title_full | Hollow Iron Oxide Nanospheres Obtained through a Combination of Atomic Layer Deposition and Electrospraying Technologies |
| title_fullStr | Hollow Iron Oxide Nanospheres Obtained through a Combination of Atomic Layer Deposition and Electrospraying Technologies |
| title_full_unstemmed | Hollow Iron Oxide Nanospheres Obtained through a Combination of Atomic Layer Deposition and Electrospraying Technologies |
| title_short | Hollow Iron Oxide Nanospheres Obtained through a Combination of Atomic Layer Deposition and Electrospraying Technologies |
| title_sort | hollow iron oxide nanospheres obtained through a combination of atomic layer deposition and electrospraying technologies |
| topic | magnetic properties hollow nanospheres atomic layer deposition hematite (Fe<sub>2</sub>O<sub>3</sub>) magnetite (Fe<sub>3</sub>O<sub>4</sub>) poly(vinylpyrrolidone) (PVP) |
| url | https://www.mdpi.com/2079-4991/12/18/3180 |
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