Please use this identifier to cite or link to this item: https://doi.org/10.1021/nn9006797
Title: Single-crystalline MFe2O4 nanotubes/nanorings synthesized by thermal transformation process for biological applications
Authors: Fan, H.-M. 
Yi, J.-B. 
Yang, Y.
Kho, K.-W.
Tan, H.-R.
Shen, Z.-X.
Ding, J. 
Sun, X.-W.
Olivo, M.C. 
Feng, Y.-P. 
Keywords: Biological applications
Cubic spinel ferrites
Magnetic properties
Nanotubes/nanorings
Thermal transformation
Issue Date: 22-Sep-2009
Citation: Fan, H.-M., Yi, J.-B., Yang, Y., Kho, K.-W., Tan, H.-R., Shen, Z.-X., Ding, J., Sun, X.-W., Olivo, M.C., Feng, Y.-P. (2009-09-22). Single-crystalline MFe2O4 nanotubes/nanorings synthesized by thermal transformation process for biological applications. ACS Nano 3 (9) : 2798-2808. ScholarBank@NUS Repository. https://doi.org/10.1021/nn9006797
Abstract: We report a general thermal transformation approach to synthesize single-crystalline magnetic transition metal oxides nanotubes/nanorings including magnetite Fe3O4, maghematite γ-Fe 2O3, and ferrites MFe2O4 (M = Co, Mn, Ni, Cu) using hematite α-Fe2O3 nanotubes/nanorings template. While the straightforward reduction or reduction-oxides process was employed to produce Fe3O4 and γ-Fe2O3, the α-Fe2O3/M(OH)2 core/shell nanostructure was used as precursor to prepare MFe2O 4 nanotubes via MFe2O4-x (0 < x < 1) intermediate. The transformed ferrites nanocrystals retain the hollow structure and single-crystalline nature of the original templates. However, the crystallographic orientation-relationships of cubic spinel ferrites and trigonal hematite show strong correlation with their morpologies. The hollow-structured MFe2O4 nanocrystals with tunable size, shape, and composition have exhibited unique magnetic properties. Moreover, they have been demonstrated as a highly effective peroxidase mimic catalysts for laboratory immunoassays or as a universal nanocapsules hybridized with luminescent QDs for magnetic separation and optical probe of lung cancer cells, suggesting that these biocompatible magnetic nanotubes/nanorings have great potential in biomedicine and biomagnetic applications. © 2009 American Chemical Society.
Source Title: ACS Nano
URI: http://scholarbank.nus.edu.sg/handle/10635/86708
ISSN: 19360851
DOI: 10.1021/nn9006797
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