@article{883307698ca3492b85abcf4e048a086c,
title = "Synthesis of monosized magnetic-optical AuFe alloy nanoparticles",
abstract = "We report the preparation and characterization of multifunctional AuFe alloy nanoparticles of three compositions, Au0.25 Fe0.75, Au0.5 Fe0.5, and Au0.75 Fe0.25, by a polyol process. It is found that the fusion of the two elements into one nanostructure entity retains the optical and magnetic properties of the individual components. The x-ray diffraction and transmission electron microscopy analyses confirm the formation of the alloy nanostructure with a narrow distribution of particle sizes and provides the detailed structural arrangements. The magnetic investigation shows the superparamagnetic or soft ferromagnetic behavior of the nanoparticles at room temperature, whereas the UV-visible measurements display the variation of the absorption bands at ∼560 nm. The AuFe nanoparticles are rendered water soluble after thiolation.",
author = "Liu, {Hong Ling} and Wu, {Jun Hua} and Min, {Ji Hyun} and Kim, {Young Keun}",
note = "Funding Information: This work was supported by the Seoul R&BD program (No. 10920) and by the Korea Science and Engineering Foundation through the National Research Laboratory Program (No. M10500000105-05J0000-10510). FIG. 1. XRD patterns of the AuFe nanoparticles with three compositions of (a) Au 0.75 Fe 0.25 , (b) Au 0.5 Fe 0.5 , and (c) Au 0.25 Fe 0.75 , respectively, in addition to (d) Au and (e) Fe 3 O 4 obtained from the same way. The curves are shifted for clarity. FIG. 2. TEM morphology of the AuFe nanoparticles with three compositions of (a) Au 0.75 Fe 0.25 , (b) Au 0.5 Fe 0.5 , and (c) Au 0.25 Fe 0.75 , respectively. FIG. 3. High resolution TEM (HRTEM) morphology of the AuFe nanoparticles with three compositions of (a) Au 0.75 Fe 0.25 , (b) Au 0.5 Fe 0.5 , and (c) Au 0.25 Fe 0.75 , respectively. FIG. 4. M - H hysteresis loops of the AuFe nanoparticles with three compositions of (a) Au 0.75 Fe 0.25 , (b) Au 0.5 Fe 0.5 , and (c) Au 0.25 Fe 0.75 , respectively. FIG. 5. UV-visible absorption spectrum of the Au 0.5 Fe 0.5 nanoparticles in hexane (a), compared to that of (b) Au and (c) Fe 3 O 4 obtained from the same way. ",
year = "2008",
doi = "10.1063/1.2837619",
language = "English",
volume = "103",
journal = "Journal of Applied Physics",
issn = "0021-8979",
publisher = "American Institute of Physics Publising LLC",
number = "7",
}