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| Content Provider | Taylor & Francis Online |
|---|---|
| Author | Wichai, Uthai Tumcharern, Gamolwan Theppaleak, Thapanapong Boontha, Boonjira Rutnakornpituk, Metha |
| Abstract | We herein describe a facile synthesis of superparamagnetic magnetite ferrofluids having long-term stability in aqueous dispersions. A single-step thermal decomposition reaction of iron (III) acetylacetonate (Fe(acac)3) was carried out in the presence of poly(ethylene glycol) methyl ether (mPEG) to serve both as a reducing agent and reaction solvent. The role of number average molecular weight () of mPEG (350 and 750 g/mol) on the size and properties of the particles was investigated. Fourier-transform infrared spectrophotometry (FTIR) indicated the presence of mPEG in the polymer–magnetite complexes. According to thermogravimetric analysis (TGA), the complexes consisted of 40–66% Fe3O4, depending on the molecular weights of mPEG used. According to the transmission electron micrographs (TEM), the particles prepared in 350 g/mol mPEG exhibited the average diameter of 7.8 ± 1.4 nm, while those in 750 g/mol mPEG were 5.3 ± 1.1 nm. From photocorrelation spectroscopy (PCS) experiments, the size of 350 g/mol mPEG–magnetite complex and 750 g/mol mPEG–magnetite complex were 37.1 ± 1.0 nm and 35.1 ± 0.4 nm, respectively. According to the calculation by the Debye–Scherrer equation, the sizes of 350 g/mol mPEG–magnetite complex and 750 g/mol mPEG–magnetite complex were 7.7 and 6.6 nm, respectively. They were highly crystalline and exhibited superparamagnetic properties. They were stable in aqueous dispersions with insignificant aggregation after 6 weeks of preparing. These stable, non-toxic dispersions might be potentially used in magnetically targeted biomedical applications. |
| Starting Page | 64 |
| Ending Page | 74 |
| Page Count | 11 |
| File Format | PDF HTM / HTML |
| ISSN | 17458080 17458099 |
| DOI | 10.1080/17458080.2010.487227 |
| Journal | Journal of Experimental Nanoscience |
| Volume Number | 6 |
| Issue Number | 1 |
| Language | English |
| Publisher | Taylor & Francis Group |
| Publisher Date | 2011-01-31 |
| Access Restriction | Open |
| Subject Keyword | Magnetite Nanoparticle Poly(ethylene glycol) methyl ether Water dispersible |
| Content Type | Text |
| Resource Type | Article |
| Subject | Nanoscience and Nanotechnology Materials Science Bioengineering Biomedical Engineering |
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