By a News Reporter-Staff News Editor at Energy Weekly News -- Investigators discuss new findings in Fullerenes. According to news reporting originating from Evanston, Illinois, by VerticalNews correspondents, research stated, "Understanding atomic interactions between constituents is critical to the design of high-performance nanocomposites. Here, we report an experimental-computational approach to investigate the adhesion energy between as-produced arc discharge multiwalled carbon nanotubes (MWCNTs) and graphene."
Our news editors obtained a quote from the research from Northwestern University, "An in situ scanning electron microscope (SEM) experiment is used to peel MWCNTs from graphene grown on copper foils. The force during peeling is obtained by monitoring the deflection of a cantilever. Finite element and molecular mechanics simulations are performed to assist the data analysis and interpretation of the results. A finite element analysis of the experimental configuration is employed to confirm the applicability of Kendall's peeling model to obtain the adhesion energy. Molecular mechanics simulations are used to estimate the effective contact width at the MWCNT-graphene interface. The measured surface energy is gamma = 0.20 +/- 0.09 J. m(-2) or gamma = 0.36 +/- 0.16 J. m(-2), depending on the assumed conformation of the tube cross section during peeling."
According to the news editors, the research concluded: "The scatter in the data is believed to result from an amorphous carbon coating on the MWCNTs, observed using transmission electron microscopy (TEM), and the surface roughness of graphene as characterized by atomic force microscopy (AFM)."
For more information on this research see: In Situ Scanning Electron Microscope Peeling To Quantify Surface Energy between Multiwalled Carbon Nanotubes and Graphene. ACS Nano, 2014;8(1):124-138. ACS Nano can be contacted at: Amer Chemical Soc, 1155 16TH St, NW, Washington, DC 20036, USA. (American Chemical Society - www.acs.org; ACS Nano - www.pubs.acs.org/journal/ancac3)
The news editors report that additional information may be obtained by contacting M.R. Roenbeck, Northwestern University, Dept. of Chem, Evanston, IL 60208, United States. Additional authors for this research include X.D. Wei, A.M. Beese, M. Naraghi, A. Furmanchuk, J.T. Paci, G.C. Schatz and H.D. Espinosa.
Keywords for this news article include: Evanston, Illinois, Fullerenes, United States, Nanotechnology, Emerging Technologies, North and Central America, Multiwalled Carbon Nanotube
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