Ilari, G. M., Hage, F. S., Zhang, Y., Rossell, M. D., Ramasse, Q. M., Niederberger, M. and Erni, R. (2015) Carbon–metal interfaces analyzed by aberration-corrected TEM: How copper and nickel nanoparticles interact with MWCNTs. Micron, 72, pp. 52-58. (doi: 10.1016/j.micron.2015.03.004) (PMID:25836722)
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Abstract
Experimental confirmation for the stronger interaction of Ni with multi-walled carbon nanotubes (MWCNTs) compared to Cu with MWCNTs is presented. The interfaces between Cu (Ni) nanoparticles side-on oriented onto MWCNTs are analyzed with high spatial resolution electron energy-loss spectroscopy (EELS) of the carbon K-edge. The EEL spectra reveal a rehybridization from sp2 to sp3 hybridized carbon of the outermost MWCNT layer at the Ni interface, but no such rehybridization can be observed at the Cu interface. The EELS results are supported by transmission electron microscopy (TEM) images, which show a better wetting behavior of Ni and a smaller gap at the Ni–MWCNT interface, as compared to the corresponding Cu interfaces. The different behavior of Cu and Ni can be explained in terms of differing valence d-orbital occupancy. For the successful experimental demonstration of this effect the use of a soft chemical metal deposition technique is crucial.
| Item Type: | Articles |
|---|---|
| Additional Information: | We gratefully acknowledge ETH Zürich and EMPA for financial support. G.I. and R.E. acknowledge the Swiss National Science Foundation for support under the project number 200021 134571, and R.E. and M.D.R. acknowledge support by the Swiss State Secretariat for Education, Research and Innovation under the project number C10.0089. SuperSTEM is the UK Engineering and Physical Sciences Research Council(EPSRC) National Facility for aberration-corrected STEM. The research leading to these results has received funding from the European Union Seventh Framework Programme under Grant Agreement 312483 – ESTEEM2 (Integrated Infrastructure Initiative-I3). |
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Hage, Dr Fredrik Sydow |
| Authors: | Ilari, G. M., Hage, F. S., Zhang, Y., Rossell, M. D., Ramasse, Q. M., Niederberger, M., and Erni, R. |
| College/School: | College of Science and Engineering > School of Physics and Astronomy |
| Journal Name: | Micron |
| Publisher: | Elsevier |
| ISSN: | 0968-4328 |
| ISSN (Online): | 1878-4291 |
| Published Online: | 18 March 2015 |
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