Facile Chemical Synthesis of Doped ZnO Nanocrystals Exploiting Oleic Acid
Zinc oxide nanocrystals (ZnO-NCs) doped with transition metal elements or rare earth elements can be probed for magnetic resonance imaging to be used as a molecular imaging technique for accurate diagnosis of various diseases. Herein, we use Mn as a candidate of transition metal elements and Gd as a...
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MDPI AG
2020-06-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/10/6/1150 |
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| author | Sugata Barui Roberto Gerbaldo Nadia Garino Rosaria Brescia Francesco Laviano Valentina Cauda |
| author_facet | Sugata Barui Roberto Gerbaldo Nadia Garino Rosaria Brescia Francesco Laviano Valentina Cauda |
| author_sort | Sugata Barui |
| collection | DOAJ |
| description | Zinc oxide nanocrystals (ZnO-NCs) doped with transition metal elements or rare earth elements can be probed for magnetic resonance imaging to be used as a molecular imaging technique for accurate diagnosis of various diseases. Herein, we use Mn as a candidate of transition metal elements and Gd as a presenter of rare earth elements. We report an easy and fast coprecipitation method exploiting oleic acid to synthesize spherical-shaped, small-sized doped ZnO-NCs. We show the improved colloidal stability of oleate-stabilized doped ZnO-NCs compared to the doped ZnO-NCs synthesized by conventional sol–gel synthesis method, i.e., without a stabilizing agent, especially for the Mn dopant. We also analyze their structural, morphological, optical, and magnetic properties. We are able to characterize the persistence of the crystalline properties (wurtzite structure) of ZnO in the doped structure and exclude the formation of undesired oxides by doping elements. Importantly, we determine the room-temperature ferromagnetism of the doped ZnO-NCs. This oleate-stabilized coprecipitation method can be subjected as a standard procedure to synthesize doped and also co-doped ZnO-NCs with any transition metal elements or rare earth elements. In the future, oleate-stabilized Gd/Mn-doped ZnO-NCs can be exploited as magnetic resonance imaging (MRI) contrast agents and possibly increase the signal intensity on T1-weighted images or reduce the signal intensity on T2-weighted images. |
| first_indexed | 2024-03-10T19:14:12Z |
| format | Article |
| id | doaj.art-9db5983baa7b4f6ea135ebb0043ece6e |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T19:14:12Z |
| publishDate | 2020-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-9db5983baa7b4f6ea135ebb0043ece6e2023-11-20T03:33:36ZengMDPI AGNanomaterials2079-49912020-06-01106115010.3390/nano10061150Facile Chemical Synthesis of Doped ZnO Nanocrystals Exploiting Oleic AcidSugata Barui0Roberto Gerbaldo1Nadia Garino2Rosaria Brescia3Francesco Laviano4Valentina Cauda5Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Turin, ItalyDepartment of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Turin, ItalyDepartment of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Turin, ItalyElectron Microscopy Facility, Center for Convergent Technologies, Istituto Italiano di Tecnologia (IIT), via Morego 30, 16163 Genoa, ItalyDepartment of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Turin, ItalyDepartment of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Turin, ItalyZinc oxide nanocrystals (ZnO-NCs) doped with transition metal elements or rare earth elements can be probed for magnetic resonance imaging to be used as a molecular imaging technique for accurate diagnosis of various diseases. Herein, we use Mn as a candidate of transition metal elements and Gd as a presenter of rare earth elements. We report an easy and fast coprecipitation method exploiting oleic acid to synthesize spherical-shaped, small-sized doped ZnO-NCs. We show the improved colloidal stability of oleate-stabilized doped ZnO-NCs compared to the doped ZnO-NCs synthesized by conventional sol–gel synthesis method, i.e., without a stabilizing agent, especially for the Mn dopant. We also analyze their structural, morphological, optical, and magnetic properties. We are able to characterize the persistence of the crystalline properties (wurtzite structure) of ZnO in the doped structure and exclude the formation of undesired oxides by doping elements. Importantly, we determine the room-temperature ferromagnetism of the doped ZnO-NCs. This oleate-stabilized coprecipitation method can be subjected as a standard procedure to synthesize doped and also co-doped ZnO-NCs with any transition metal elements or rare earth elements. In the future, oleate-stabilized Gd/Mn-doped ZnO-NCs can be exploited as magnetic resonance imaging (MRI) contrast agents and possibly increase the signal intensity on T1-weighted images or reduce the signal intensity on T2-weighted images.https://www.mdpi.com/2079-4991/10/6/1150doped ZnO nanocrystalsGd/Mn dopingoleate-stabilizedcoprecipitationoptical and magnetic properties |
| spellingShingle | Sugata Barui Roberto Gerbaldo Nadia Garino Rosaria Brescia Francesco Laviano Valentina Cauda Facile Chemical Synthesis of Doped ZnO Nanocrystals Exploiting Oleic Acid Nanomaterials doped ZnO nanocrystals Gd/Mn doping oleate-stabilized coprecipitation optical and magnetic properties |
| title | Facile Chemical Synthesis of Doped ZnO Nanocrystals Exploiting Oleic Acid |
| title_full | Facile Chemical Synthesis of Doped ZnO Nanocrystals Exploiting Oleic Acid |
| title_fullStr | Facile Chemical Synthesis of Doped ZnO Nanocrystals Exploiting Oleic Acid |
| title_full_unstemmed | Facile Chemical Synthesis of Doped ZnO Nanocrystals Exploiting Oleic Acid |
| title_short | Facile Chemical Synthesis of Doped ZnO Nanocrystals Exploiting Oleic Acid |
| title_sort | facile chemical synthesis of doped zno nanocrystals exploiting oleic acid |
| topic | doped ZnO nanocrystals Gd/Mn doping oleate-stabilized coprecipitation optical and magnetic properties |
| url | https://www.mdpi.com/2079-4991/10/6/1150 |
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