TY - JOUR
T1 - Tunable synthesis and multifunctionalities of Fe3O 4-ZnO hybrid core-shell nanocrystals
AU - Liu, Hongling
AU - Wu, Junhua
AU - Min, Ji Hyun
AU - Zhang, Xiaoyan
AU - Kim, Young Keun
N1 - Funding Information:
This work was supported in part by the Pioneer Research Center Program through the National Research Foundation of Korea funded by the Ministry of Education, Science and Technology ( 2012-0001067 ) and by the Seoul R&BD Program (No. 10920), South Korea, the National Natural Science Foundation of China (No. 51172064 ), and the Scientific and Technological Development Projects, Science and Technology Department of Henan Province, China (No. 112300410011 ). J. H. Min acknowledges the financial support by Korea University and a synchrotron beamline at Pohang Accelerator Laboratory, South Korea, was used in this study.
Copyright:
Copyright 2013 Elsevier B.V., All rights reserved.
PY - 2013/2
Y1 - 2013/2
N2 - We report the tunable synthesis and multifunctionalities of Fe 3O4-ZnO hybrid core-shell nanocrystals as prepared through controlled sequential nanoemulsion processes. The characterization shows the orderly variations of the structural, magnetic, photoluminescent and absorption properties of the nanocrystals versus the nanoshell thickness. The nanocrystals reveal structural features unique to the core-shell design and exhibit well-defined superparamagnetic behavior at room temperature. In opposite to the decreasing magnetization, both bandgap and induced surface emissions depend strongly on the increasing nanoshell thickness. Moreover, the FTIR analysis provides the fingerprints of the polymer surfactant, ZnO and Fe 3O4 in the same nano-entity and the core-shell nanocrystals could be directly dispersed in both aqueous and organic media for application readiness. Aptly tunable in nanostructures and thus optimized properties, this kind of monosized, high quality, and multifunctional core-shell nanocrystals could be of interest for fundamental studies and potential applications.
AB - We report the tunable synthesis and multifunctionalities of Fe 3O4-ZnO hybrid core-shell nanocrystals as prepared through controlled sequential nanoemulsion processes. The characterization shows the orderly variations of the structural, magnetic, photoluminescent and absorption properties of the nanocrystals versus the nanoshell thickness. The nanocrystals reveal structural features unique to the core-shell design and exhibit well-defined superparamagnetic behavior at room temperature. In opposite to the decreasing magnetization, both bandgap and induced surface emissions depend strongly on the increasing nanoshell thickness. Moreover, the FTIR analysis provides the fingerprints of the polymer surfactant, ZnO and Fe 3O4 in the same nano-entity and the core-shell nanocrystals could be directly dispersed in both aqueous and organic media for application readiness. Aptly tunable in nanostructures and thus optimized properties, this kind of monosized, high quality, and multifunctional core-shell nanocrystals could be of interest for fundamental studies and potential applications.
KW - A. Inorganic compounds
KW - A. Nanostructures
KW - B. Chemical synthesis
KW - D. Magnetic properties
KW - D. Optical properties
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U2 - 10.1016/j.materresbull.2012.11.051
DO - 10.1016/j.materresbull.2012.11.051
M3 - Article
AN - SCOPUS:84871720342
VL - 48
SP - 551
EP - 558
JO - Materials Research Bulletin
JF - Materials Research Bulletin
SN - 0025-5408
IS - 2
ER -