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Simple and generalized synthesis of oxide-metal heterostructured nanoparticles and their applications in multimodal biomedical probes

Cited 146 time in Web of Science Cited 145 time in Scopus
Authors
Choi, Sang-Hyun; Na, Hyon Bin; Park, Yong Il; An, Kwangjin; Kwon, Soon Gu; Jang, Youngjin; Park, Mi-hyun; Moon, Jaewon; Son, Jae Sung; Song, In Chan; Moon, Woo Kyung; Hyeon, Taeghwan
Issue Date
2008-11
Citation
Journal of the American Chemical Society, Vol.130 No.46, pp.15573-15580
Abstract
Heterostructured nanoparticles composed of metals and Fe3O4 or MnO were synthesized by thermal decomposition of mixtures of metal-oleate complexes (for the oxide component) and metal-oleylamine complexes (for the metal component). The products included flowerlike-shaped nanoparticles of Pt-Fe3O4 and Ni-Fe3O4 and snowmanlike-shaped nanoparticles of Ag-MnO and Au-MnO. Powder X-ray diffraction patterns showed that these nanoparticles were composed of face-centered cubic (fcc)-structured Fe3O4 or MnO and fcc-structured metals. The relaxivity values of the Au-MnO and Au-Fe3O4 nanoparticles were similar to those of the MnO and Fe3O4 nanoparticles, respectively. Au-Fe3O4 heterostructured nanoparticles conjugated with two kinds of 12-base oligonucleotide sequences were able to sense a complementary 24-mer sequence, causing nanoparticle aggregation. This hybridization-mediated aggregation was detected by the overall size increase indicated by dynamic light scattering data, the red shift of the surface plasmon band of the Au component, and the enhancement of the signal intensity of the Fe3O4 component in T-2-weighted magnetic resonance imaging.
ISSN
0002-7863
URI
http://hdl.handle.net/10371/165842
DOI
https://doi.org/10.1021/ja805311x
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Chemical and Biological Engineering (화학생물공학부)Journal Papers (저널논문_화학생물공학부)
College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Chemical and Biological Engineering (화학생물공학부)Chemical Convergence for Energy and Environment (에너지환경 화학융합기술전공)Journal Papers (저널논문_에너지환경 화학융합기술전공)
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