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- W2891287326 abstract "Preparation of stable BiFeO 3 nanocrystal suspensions through a simple, low-cost precipitation technique is described. Amorphous precursors are first precipitated from metal nitrate salts in highly basic KOH solutions, and a short high-temperature annealing step is then performed to induce crystallization. Nanoparticles are characterized by X-ray diffraction (XRD), TEM, DLS and ζ -potential measurements, and the synthesis conditions optimized after a systematic variation of the KOH concentration within the range of 1–12 M. The presence of residual impurities (mainly Bi 25 FeO 39 and Bi 2 Fe 4 O 9 ) quantified from XRD and mean nanocrystal size is found to be strongly influenced by the initial KOH solution content. A concentration at about 3–4 M is optimal in terms of BiFeO 3 phase-purity and nanocrystal size. Stability of aqueous dispersions of the amorphous precursors and of the purest crystallized nanoparticles is also characterized between pH = 2 and pH = 13. After preparation of stable, almost phase-pure BiFeO 3 nanocrystal suspensions, second and third harmonic scattering (SHS and THS) at excitation wavelengths of 1064 nm and 1250 nm are reported from nonlinear optical scattering measurements and compared with other recently published literature values." @default.
- W2891287326 created "2018-09-27" @default.
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- W2891287326 date "2018-09-09" @default.
- W2891287326 modified "2023-09-25" @default.
- W2891287326 title "Preparation and Preliminary Nonlinear Optical Properties of BiFeO<sub>3</sub> Nanocrystal Suspensions from a Simple, Chelating Agent-Free Precipitation Route" @default.
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- W2891287326 doi "https://doi.org/10.1155/2018/3019586" @default.
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