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SURFACE MODIFICATION AND CHARACTERIZATION OF Fe₃O₄/Au COMPOSITE NANOPARTICLES

FENG SHI

College of Life Sciences, Northwest University, Xi'an 710069, P. R. China

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WENLI HUI

College of Life Sciences, Northwest University, Xi'an 710069, P. R. China

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YALI CUI

College of Life Sciences, Northwest University, Xi'an 710069, P. R. China

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, and

CHAO CHEN

National Engineering Research Center for Miniaturized Detection Systems, Xi'an 710069, P. R. China

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https://doi.org/10.1142/S1793292011002469Cited by:5 (Source: Crossref)

Abstract

Fe₃O₄/Au composite nanoparticles were modified with α-thio-ω-carboxy poly (ethylene glycol). Results from XRD, selected area diffraction, high-resolution TEM images, and dynamic lighting scattering illustrate that the particles have a core/shell composite structure and were monodispersed. Surface plasmon resonance measured by UV–Vis indicates that the absorption peak of the modified composite particle characteristic at 532 nm can be stably suspended in a different buffer. The modified composite particles also have good response to external magnetic field. The Fe₃O₄/Au composite nanoparticles are magnetically and optically active, and are useful for simultaneous magnetic and optical detection. Coupled with biomolecules, the advantages of these composite particles make them very promising for biomedical applications in the near future.

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References

J. Parket al., Nat. Mater. 3, 890 (2004), DOI: 10.1038/nmat1251. Web of Science, Google Scholar
H. Zeng and S. Sun, Adv. Funct. Mater. 18, 391 (2008), DOI: 10.1002/adfm.200701211. Crossref, Web of Science, Google Scholar
X. Wang and Y. Li, Chem. Commun. 28, 2901 (2007). Google Scholar
S. Laurentet al., Chem. Rev. 108, 2064 (2008), DOI: 10.1021/cr068445e. Crossref, Web of Science, Google Scholar
J. Gao, H. Gu and B. Xu, Acc. Chem. Res. 42, 1097 (2009), DOI: 10.1021/ar9000026. Crossref, Web of Science, Google Scholar
C. C. You, A. Verma and V. M. Rotello, Soft Matte. 24, 190 (2006). Google Scholar
C. S. Thaxton, D. G. Georganopoulou and C. A. Mirkin, Clin. Chim. Act. 363, 120 (2006), DOI: 10.1016/j.cccn.2005.05.042. Crossref, Web of Science, Google Scholar
M. C. Daniel and D. Astruc, Chem. Rev. 104, 293 (2004), DOI: 10.1021/cr030698+. Crossref, Web of Science, Google Scholar
G. F. Paciotti, D. G. I. Kingston and L. Tamarkin, Drug Dev. Res. 67, 47 (2006), DOI: 10.1002/ddr.20066. Crossref, Web of Science, Google Scholar
N. Nagataniet al., Sci. Technol. Adv. Mater. 21, 270 (2006). Web of Science, Google Scholar
L. Wanget al., J. Mater. Chem. 18, 2629 (2008), DOI: 10.1039/b719096d. Crossref, Web of Science, Google Scholar
X. Honget al., Biosens. Bioelectron. 10, 66 (2010). Web of Science, Google Scholar
S. H. Cartmellet al., J. Phys. Conf. Ser. 17, 77 (2005), DOI: 10.1088/1742-6596/17/1/013. Crossref, Google Scholar
Z. H. Xuet al., J. Phys. Chem. 114, 16343 (2010). Web of Science, Google Scholar
H. Zhanget al., Langmui. 24, 13748 (2008), DOI: 10.1021/la8028935. Crossref, Web of Science, Google Scholar
J. A. Banksonet al., J. Phys. Chem. 111, 6245 (2007). Google Scholar
C. S. Levinet al., ACS Nan. 3, 1379 (2009), DOI: 10.1021/nn900118a. Crossref, Web of Science, Google Scholar
Q. Yuet al., Nanotechnolog 19, 265702 (2008), DOI: 10.1088/0957-4484/19/26/265702. Crossref, Web of Science, Google Scholar
H. Y. Xieet al., J. Phys. Chem. 114, 4825 (2010). Web of Science, Google Scholar
Y. H. Weiet al., Small 10, 1635 (2008). Google Scholar
X. Zhaoet al., Anal. Chem. 80, 9091 (2008), DOI: 10.1021/ac801581m. Crossref, Web of Science, Google Scholar
S. Wanget al., Nanotechnolog 2, 25605 (2009). Google Scholar
S. F. Chin, K. S. Iyer and C. L. Raston, Cryst. Growth and Desig 9, 2685 (2009), DOI: 10.1021/cg8013199. Crossref, Web of Science, Google Scholar
Z. Xu, Y. Hou and S. Sun, J. Am. Chem. Soc. 129, 8698 (2007), DOI: 10.1021/ja073057v. Crossref, Web of Science, Google Scholar
D. Wang and Y. Li, J. Am. Chem. Soc. 132, 6280 (2010), DOI: 10.1021/ja100845v. Crossref, Web of Science, Google Scholar
S. H. Choiet al., J. Am. Chem. Soc. 130, 15573 (2008), DOI: 10.1021/ja805311x. Crossref, Web of Science, Google Scholar
L. Wanget al., J. Phys. Chem. B 109, 21593 (2005), DOI: 10.1021/jp0543429. Crossref, Web of Science, Google Scholar
C. J. Xuet al., Angew. Chem. Int. Ed. Engl. 47, 173 (2008), DOI: 10.1002/anie.200704392. Crossref, Web of Science, Google Scholar
S. H. Xuanet al., Langmuir 25, 11835 (2009), DOI: 10.1021/la901462t. Crossref, Web of Science, Google Scholar
Y. Cuiet al., Sci. Chin. Ser. B: Chem. 49, 534 (2006), DOI: 10.1007/s11426-006-2005-x. Crossref, Web of Science, Google Scholar
X. Chaoet al., J. Drug Targe. 19, 161 (2010), DOI: 10.3109/10611861003801842. Crossref, Web of Science, Google Scholar
X. Chaoet al., Pharmazie 65, 500 (2010). Web of Science, Google Scholar
Y. Cuiet al., Sci. Chin. Ser. B: Chem. 48, 273 (2005). Crossref, Web of Science, Google Scholar
X. Lianget al., Adv. Funct. Mater. 16, 1805 (2006), DOI: 10.1002/adfm.200500884. Crossref, Web of Science, Google Scholar
X. Wang, Q. Peng and Y. Li, Acc. Chem. Res. 40, 635 (2007), DOI: 10.1021/ar600007y. Crossref, Web of Science, Google Scholar
T. Hyeonet al., J. Am. Chem. Soc. 123, 12798 (2001), DOI: 10.1021/ja016812s. Crossref, Web of Science, Google Scholar
B. C. R. Kohanlooet al., Nanotechnology 20, 434005 (2009). Crossref, Web of Science, Google Scholar
C. J. Murphyet al., J. Phys. Chem. 109, 13857 (2005). Crossref, Web of Science, Google Scholar
A. Wijaya and K. Hamad-Schifferli, Langmuir 24, 9966 (2008), DOI: 10.1021/la8019205. Crossref, Web of Science, Google Scholar
H. Liao and J. H. Hafner, Chem. Mater. 17, 4636 (2005), DOI: 10.1021/cm050935k. Crossref, Web of Science, Google Scholar
J. Schmittet al., Langmuir 15, 3256 (1999), DOI: 10.1021/la981078k. Crossref, Web of Science, Google Scholar
D. Ecket al., Langmuir 17, 957 (2001), DOI: 10.1021/la001142+. Crossref, Web of Science, Google Scholar
C. C. You, A. Verma and V. M. Rotello, Soft Matter 24, 189 (2006). Google Scholar
K. Aslan and V. H. Pérez-Luna, Langmuir 18, 6059 (2002), DOI: 10.1021/la025795x. Crossref, Web of Science, Google Scholar
K. S. Mayya, B. Schoeler and F. Caruso, Adv. Funct. Mater. 3, 183 (2003). Google Scholar
J. K. Limet al., Adv. Mater. 20, 1721 (2008), DOI: 10.1002/adma.200702196. Crossref, Web of Science, Google Scholar