Premium
Structure of amorphous carbon films deposited on Ni nanoparticles under ultrahigh vacuum at room temperature
Author(s) -
Asaka Koji,
Saito Yahachi
Publication year - 2016
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.6080
Subject(s) - raman spectroscopy , nanoparticle , amorphous solid , amorphous carbon , materials science , high resolution transmission electron microscopy , transmission electron microscopy , carbon fibers , nickel , chemical engineering , carbon black , analytical chemistry (journal) , nanotechnology , crystallography , chemistry , optics , metallurgy , composite material , composite number , organic chemistry , physics , natural rubber , engineering
We present transmission electron microscopy and Raman spectroscopy of amorphous carbon (a‐C) films deposited on clean surfaces of nickel (Ni) nanoparticles at room temperature. In the Raman spectrum measured from the a‐C film on the Ni nanoparticles, the broad peaks of the D and G modes appeared at 1388 and 1582 cm −1 , respectively. The high‐resolution images and the corresponding filtered inverse fast Fourier transformed images of the a‐C film on the individual Ni nanoparticles showed that the a‐C film only around the Ni nanoparticles formed disordered graphitic layers, similar in structure to carbon black, without heat treatment. The present observation suggests that spontaneous graphitization of a‐C on the clean surfaces of the Ni nanoparticles occurs at room temperature. Copyright © 2016 John Wiley & Sons, Ltd.