Structural Evolution of Flower Defects and Effects on the Electronic Structures of Epitaxial Graphene

2017 ◽  
Vol 121 (28) ◽  
pp. 15282-15287 ◽  
Author(s):  
Yufeng Cui ◽  
Huisheng Zhang ◽  
Wei Chen ◽  
Zhongqin Yang ◽  
Qun Cai
Keyword(s):  
Electronic Structures ◽  
Structural Evolution ◽  
Epitaxial Graphene

scholarly journals Origin of Anomalous Electronic Structures of Epitaxial Graphene on Silicon Carbide

2008 ◽  
Vol 100 (17) ◽  
Author(s):  
Seungchul Kim ◽  
Jisoon Ihm ◽  
Hyoung Joon Choi ◽  
Young-Woo Son
Keyword(s):  
Silicon Carbide ◽  
Electronic Structures ◽  
Epitaxial Graphene

Metastable phase formation and structural evolution of epitaxial graphene grown on SiC(100) under a temperature gradient

2012 ◽  
Vol 23 (17) ◽  
pp. 175603 ◽  
Author(s):  
A M B Goncalves ◽  
A Malachias ◽  
M S Mazzoni ◽  
R G Lacerda ◽  
R Magalhães-Paniago
Keyword(s):  
Temperature Gradient ◽  
Phase Formation ◽  
Metastable Phase ◽  
Structural Evolution ◽  
Epitaxial Graphene ◽  
Metastable Phase Formation

Electronic Structures and Structural Evolution of Hydrogenated Graphene Probed by Raman Spectroscopy

2011 ◽  
Vol 115 (5) ◽  
pp. 1422-1427 ◽  
Author(s):  
Zhiqiang Luo ◽  
Ting Yu ◽  
Zhenhua Ni ◽  
Sanhua Lim ◽  
Hailong Hu ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Electronic Structures ◽  
Structural Evolution ◽  
Hydrogenated Graphene

Electronic structures of an epitaxial graphene monolayer on SiC(0001) after gold intercalation: a first-principles study

2011 ◽  
Vol 22 (27) ◽  
pp. 275704 ◽  
Author(s):  
Feng-Chuan Chuang ◽  
Wen-Huan Lin ◽  
Zhi-Quan Huang ◽  
Chia-Hsiu Hsu ◽  
Chien-Cheng Kuo ◽  
...  
Keyword(s):  
First Principles ◽  
Electronic Structures ◽  
Epitaxial Graphene ◽  
Graphene Monolayer ◽  
First Principles Study

Microstructure and reactivity of small metal particles: The role of Ce additives

1992 ◽  
Vol 50 (1) ◽  
pp. 318-319
Author(s):  
L.D. Schmidt ◽  
K. R. Krause ◽  
J. M. Schwartz ◽  
X. Chu
Keyword(s):  
Atmospheric Pressure ◽  
Noble Metals ◽  
Mixed Oxides ◽  
Catalytic Properties ◽  
Chemical Shifts ◽  
Catalytic Converter ◽  
Structural Evolution ◽  
Single Particles ◽  
Small Metal Particles

The evolution of microstructures of 10- to 100-Å diameter particles of Rh and Pt on SiO2 and Al2O3 following treatment in reducing, oxidizing, and reacting conditions have been characterized by TEM. We are able to transfer particles repeatedly between microscope and a reactor furnace so that the structural evolution of single particles can be examined following treatments in gases at atmospheric pressure. We are especially interested in the role of Ce additives on noble metals such as Pt and Rh. These systems are crucial in the automotive catalytic converter, and rare earths can significantly modify catalytic properties in many reactions. In particular, we are concerned with the oxidation state of Ce and its role in formation of mixed oxides with metals or with the support. For this we employ EELS in TEM, a technique uniquely suited to detect chemical shifts with ∼30Å resolution.

The Nature of Oxide Surfaces: Topographic and Electronic Structure

1993 ◽  
Vol 51 ◽  
pp. 966-967
Author(s):  
Dawn A. Bonnell ◽  
Yong Liang
Keyword(s):  
Transition Metal Oxides ◽  
Electronic Structures ◽  
Recent Progress ◽  
Spatial Localization ◽  
Level Of Detail ◽  
Scanning Tunneling ◽  
Oxide Surfaces ◽  
Tunneling Microscopy ◽  
Considerable Effort ◽  
Complete Understanding

Recent progress in the application of scanning tunneling microscopy (STM) and tunneling spectroscopy (STS) to oxide surfaces has allowed issues of image formation mechanism and spatial resolution limitations to be addressed. As the STM analyses of oxide surfaces continues, it is becoming clear that the geometric and electronic structures of these surfaces are intrinsically complex. Since STM requires conductivity, the oxides in question are transition metal oxides that accommodate aliovalent dopants or nonstoichiometry to produce mobile carriers. To date, considerable effort has been directed toward probing the structures and reactivities of ZnO polar and nonpolar surfaces, TiO2 (110) and (001) surfaces and the SrTiO3 (001) surface, with a view towards integrating these results with the vast amount of previous surface analysis (LEED and photoemission) to build a more complete understanding of these surfaces. However, the spatial localization of the STM/STS provides a level of detail that leads to conclusions somewhat different from those made earlier.

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