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Kuchibhatla, Satyanarayana V. N. T.; Shutthanandan, V; Prosa, T. J.; Adusumilli, P.; Arey, B.; Buxbaum, A.; Wang, Y. C.; Tessner, T.; Ulfig, R.; Wang, C. M.; Thevuthasan, S. |
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Three-dimensional chemical imaging of embedded nanoparticles using atom probe tomography |
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Journal Article |
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2012 |
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Nanotechnology |
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23 |
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215704 |
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Analysis of nanoparticles is often challenging especially when they are embedded in a matrix. Hence, we have used laser-assisted atom probe tomography (APT) to analyze the Au nanoclusters synthesized in situ using ion-beam implantation in a single crystal MgO matrix. APT analysis along with scanning transmission electron microscopy and energy dispersive spectroscopy (STEM-EDX) indicated that the nanoparticles have an average size ~ 8-12 nm. While it is difficult to analyze the composition of individual nanoparticles using STEM, APT analysis can give three-dimensional compositions of the same. It was shown that the maximum Au concentration in the nanoparticles increases with increasing particle size, with a maximum Au concentration of up to 50%. |
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0957-4484 |
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11355 |
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