In situ synthesis of cobalt nanocrystal hierarchies in a transmission electron microscope
Source abstract
Abstract
We report a versatile electron beam (e-beam) synthesis method for the local fabrication of ferromagnetic nanocrystals “on demand”. A localized irradiation in a transmission electron microscope (TEM) is used to convert a raw cobalt fluoride material into ferromagnetic metal by means of formation of a short-range ordered distribution of well-defined faceted three-dimensional (3D) cobalt nanocrystals on the carbon substrate. A range of sizes and morphologies can be obtained, depending on the size, intensity, and acceleration voltage of the e-beam and on the initial size/thickness of the 3D raw fluoride materials, with 300 kV acceleration voltage and thermionic LaB6 emission found most favorable. The nanofabrication of locally quasi-monodispersed, small sized, and well-distributed 3D nanocrystals opens up the possibility to generate particle arrays on demand with desirable magnetic properties.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: nanoparticles nucleation surface interactions · Copper-based nanomaterials and applications · Advanced Electron Microscopy Techniques and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (39)
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