Publications by authors named "Dang Phu Nguyen"
The composition, structural features, surface morphology, roughness parameters, particle size, and magnetic features of nanostructured Fe-Co-Ni deposits manufactured on conducting indium tin oxide-coated glasses at various electrolyte pH values are studied. The deposit produced at low electrolyte pH contains slightly higher Fe and Co contents but lower Ni content compared to deposits fabricated at high pH values. Further composition analysis confirms that the reduction rates of Fe and Co are higher than the Ni reduction rate.
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- Researchers developed a magneto-photonic device using a low one-photon absorption (LOPA) direct laser writing (DLW) technique on a nanocomposite made of magnetite (Fe3O4) nanoparticles mixed with SU-8 photoresist.
- The dispersion of Fe3O4 nanoparticles varied based on their concentration, the viscosity of the SU-8 resist, and the mixing duration, with the optimal homogeneity achieved at 2 wt% concentration and a 20-day mixing period.
- The LOPA-based DLW enabled the creation of submicrometer magneto-photonic structures as small as 150 nm, showcasing strong magnetic field responses and potential applications as micro-actuators in liquid environments.
Article Synopsis
- Co-Pt nanoparticles were created using sonoelectrodeposition, a method that employs ultrasound to enhance the production of metallic nanoparticles on a cathode.
- The atomic ratio of cobalt to platinum in the nanoparticles could be adjusted by changing the deposition current density, resulting in a mix of Pt-rich and Co-rich structures.
- Following an annealing process at 700°C in a CO atmosphere, the nanoparticles formed into an ordered CoPt alloy with hard magnetic properties and were encapsulated in carbon cages, which helped to prevent sintering and increased their size to about 100 nm.