| Title: | Hybrid nanostructures of ▫$Fe_3O_4$▫ and Au prepared via coprecipitation and ultrasonic spray pyrolysis |
|---|
| Authors: | ID Kresnik, Lan (Author)
ID Majerič, Peter (Author)
ID Feizpour, Darja (Author)
ID Pušnik Črešnar, Klementina (Author)
ID Rudolf, Rebeka (Author) |
|---|
| Files: |  metals-14-01324-v2.pdf (7,32 MB)
MD5: A93FAED9B4F897C78B4122F7CFE96481
 https://www.mdpi.com/2075-4701/14/12/1324
|
|---|
| Language: | English |
|---|
| Work type: | Article |
|---|
| Typology: | 1.01 - Original Scientific Article |
|---|
| Organization: | FS - Faculty of Mechanical Engineering
|
|---|
| Abstract: | The coupled processes of coprecipitation and ultrasonic spray pyrolysis (USP) were used to synthesize Fe3O4-Au hybrid nanostructures. The first coprecipitation method enabled the synthesis of Fe3O4 nanoparticles by mixing iron salts’ ions (Fe2+ and Fe3+) and ammonia as the base, and USP was used as the coating process of the Fe3O4 nanoparticles with Au. The formatted hybrid nanostructures consist of Fe3O4 nanoparticles that have Au on their surface in the form of gold nanoparticles (AuNPs). AuNPs have a crystalline structure and range in size from 10 to 200 nm. Additional characterization techniques, including ICP-OES, TEM, SEM, EDS, DLS, zeta potential, and room temperature magnetic hysteresis loops, were used to determine the chemical, physical, and magnetic properties of the Fe3O4 nanoparticles and hybrid nanostructures. It was found that USP produces separate AuNPs too (not just on the Fe3O4 surface), suggesting a bimodal formation of AuNPs. The zeta potential of the Fe3O4 nanoparticles showed poor stability (−15 mV), indicating a high tendency to aggregate, and the zeta potential of the hybrid nanostructures was also very low (≅0), which, comparatively means even worse stability. The saturation magnetization of the Fe3O4 nanoparticles was 35 emu/g, which is relatively lower than that of bulk Fe3O4, while the saturation magnetization of the hybrid nanostructures was significantly lower (0.1 emu/g) compared to the Fe3O4 nanoparticles. |
|---|
| Keywords: | magnetic NPs, gold NPs, transmission electron microscopy, magnetic properties |
|---|
| Publication status: | Published |
|---|
| Publication version: | Version of Record |
|---|
| Submitted for review: | 26.09.2024 |
|---|
| Article acceptance date: | 21.11.2024 |
|---|
| Publication date: | 23.11.2024 |
|---|
| Publisher: | MDPI AG |
|---|
| Year of publishing: | 2024 |
|---|
| Number of pages: | 16 str. |
|---|
| Numbering: | Vol. 14, iss. 12, [article no.] 1324 |
|---|
| PID: | 20.500.12556/DKUM-91220  |
|---|
| UDC: | 669.21:620.1 |
|---|
| ISSN on article: | 2075-4701 |
|---|
| COBISS.SI-ID: | 216970755 |
|---|
| DOI: | 10.3390/met14121324 |
|---|
| Copyright: | © 2024 by the authors |
|---|
| Publication date in DKUM: | 29.11.2024 |
|---|
| Views: | 167 |
|---|
| Downloads: | 29 |
|---|
| Metadata: |    |
|---|
| Categories: | Misc.
|
|---|
|
:
|
Copy citation |
|---|
| | | | Average score: | (0 votes) |
|---|
| Your score: | Voting is allowed only for logged in users. |
|---|
| Share: |  |
|---|
Hover the mouse pointer over a document title to show the abstract or click
on the title to get all document metadata. |
