Journal ArticleDOI
Segregation of Carbon to the (100) Surface of Nickel
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In this article, the reversible segregation of carbon to the (100) surface of nickel has been observed at temperature through measurements of work function changes and observations of LEED patterns and Auger spectra.Abstract:
The reversible segregation of carbon to the (100) surface of nickel has been observed. The surface was studied at temperature through measurements of work function changes and observations of LEED patterns and Auger spectra. The work function increases with temperature by about 0.63 eV in the temperature range 500°–800°K. This difference is close to that obtained from reported values of the work function for Ni (100) and for carbon. Below about 650°K the diffraction pattern contains rings characteristic of a graphite layer with its basal plane parallel to the substrate. In contrast with previous LEED observations of graphite precipitation at single‐crystal surfaces, the segregation described here is reversible under temperature cycling.read more
Citations
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Transfer of CVD-Grown Monolayer Graphene onto Arbitrary Substrates
Ji Won Suk,Alexander L. Kitt,Carl W. Magnuson,Yufeng Hao,Samir Ahmed,Jinho An,Anna K. Swan,Bennett B. Goldberg,Rodney S. Ruoff,Rodney S. Ruoff +9 more
TL;DR: Improved wet transfer onto perforated substrates with 2.7 μm diameter holes yields 98% coverage of holes covered with continuous films, allowing the ready use of Raman spectroscopy and transmission electron microscopy to study the intrinsic properties of CVD-grown monolayer graphene.
Journal ArticleDOI
Carbon Deposition in Steam Reforming and Methanation
TL;DR: In this article, the authors investigated the causes of deactivation of supported metal catalysts by carbon or coke formation, and found that deactivation can occur due to fouling of the metal surface, blockage of catalysts pores and voids, and actual physical disintegration of the catalyst support.
Journal ArticleDOI
From Conception to Realization: An Historial Account of Graphene and Some Perspectives for Its Future
TL;DR: This detailed account of the fascinating development of the synthesis and characterization of graphene is hoped to demonstrate that the rich history of graphene chemistry laid the foundation for the exciting research that continues to this day.
Journal ArticleDOI
Equilibrium segregation of carbon to a nickel (111) surface: A surface phase transition
TL;DR: In this article, the authors observed the first equilibrium surface phase transition for carbon-doped nickel single crystals, which they attributed to the stronger binding of carbon to this monolayer phase than to bulk graphite.
Journal ArticleDOI
Structural Influences on Adsorption Energy. III. CO on Cu(100)
TL;DR: In this paper, the adsorption of CO on Ni(100) has been studied using LEED, Auger, and work function measurements and was found to be completely reversible.
References
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Journal ArticleDOI
A new method of measuring contact potential differences in metals
TL;DR: In this paper, a method for measuring the contact potential differences between dissimilar metals is described, which enables one to measure the p.d. to 1/1000 volt in a few seconds of manipulation.