The electronic properties of carbon nanotubes studied by high resolution photoemission spectroscopy

2005 ◽  
Vol 248 (1-4) ◽  
pp. 8-13 ◽  
Author(s):  
R. Larciprete ◽  
A. Goldoni ◽  
S. Lizzit ◽  
L. Petaccia
Keyword(s):  
Carbon Nanotubes ◽  
High Resolution ◽  
Electronic Properties ◽  
Photoemission Spectroscopy

Synchrotron Photoemission Studies of Surfaces and Overlayers

1988 ◽  
Vol 143 ◽  
Author(s):  
T.-C. Chiang
Keyword(s):  
High Resolution ◽  
Binding Energy ◽  
Electronic Properties ◽  
Atomic Structure ◽  
Chemical Shifts ◽  
Quantitative Description ◽  
Photoemission Spectroscopy ◽  
Electronegativity Difference ◽  
Model Structures ◽  
Reference Samples

AbstractHigh-resolution core-level photoemission spectroscopy allows the distinction of atoms in different layers and in inequivalent sites by their binding energy shifts. By comparison with model structures and reference samples, the number of atoms in each distinct chemical configuration can be determined. The chemical shifts induced by adsorption can be correlated with the electronegativity difference between the substrate and the adsorbate atoms. These observations provide a quantitative description of the interaction and reaction between adsorbates and surfaces, and important information about the atomic structure and the electronic properties can be deduced. Results from several representative systems including the adsorption of In, Ag, and Sn on Si(100) will be discussed.

High Resolution Photoelectron Study of the Optimum Oxygen Doping Levels in High Tc Superconductors

1993 ◽  
Vol 307 ◽  
Author(s):  
R. J. Kelley ◽  
X. C. Cai ◽  
Jian Ma ◽  
D. C. Larbalestier ◽  
M. Onellion
Keyword(s):  
High Resolution ◽  
Electronic Properties ◽  
Cuprate Superconductors ◽  
Underlying Mechanism ◽  
Oxygen Stoichiometry ◽  
Photoemission Spectroscopy ◽  
Standard Material ◽  
Resonant Photoemission ◽  
Angle Resolved Photoemission Spectroscopy ◽  
Photoelectron Study

ABSTRACTThe materials and electronic properties of the new cuprate superconductors are critically dependent upon both the oxygen stoichiometry and annealing history of the material. Improving Jc, Tc, and determining the underlying mechanism of superconductivity depend on a better understanding of these effects. In the study of Bi2Sr2CaCu2O8-δ we have combined standard material characterization techniques with high resolution angle resolved photoemission spectroscopy and resonant photoemission spectroscopy to illuminate these issues. Specifically, we make high quality single crystals of BSCCO and then anneal in different atmospheres and pressures. We correlate this with c-axis resistivity, a, b-plane resistivity, and resonant photoemission spectroscopy. In this way we can explain the macroscopic transport properties in terms of the electronic properties of the material determined from photoemission. We find that we can change the c-axis resistivity from non-metallic to metallic by adding oxygen and that this correlates with increased oscillator strength in the c-axis direction at the Fermi level.

scholarly journals The electronic properties of mixed valence hydrated europium chloride thin film

2015 ◽  
Vol 17 (28) ◽  
pp. 18403-18412 ◽  
Author(s):  
M. G. Silly ◽  
F. Charra ◽  
F. Lux ◽  
G. Lemercier ◽  
F. Sirotti
Keyword(s):  
Thin Film ◽  
High Resolution ◽  
Electronic Properties ◽  
Mixed Valence ◽  
Photoemission Spectroscopy ◽  
Resonant Photoemission ◽  
Europium Chloride ◽  
The Eu

We investigate the electronic properties of a model mixed-valence hydrated chloride europium salt by means of high resolution photoemission spectroscopy (HRPES) and resonant photoemission spectroscopy (RESPES) at the Eu 3d → 4f and 4d → 4f transitions.

Correlation of Fabrication and Structural/Electronic Properties of Carbon Nanotubes Using TEM/EELS

2000 ◽  
Vol 6 (S2) ◽  
pp. 204-205
Author(s):  
B. W. Reed ◽  
M. Sarikaya ◽  
L. R. Dalton ◽  
G. F. Bertsch
Keyword(s):  
Carbon Nanotubes ◽  
High Resolution ◽  
Electronic Properties ◽  
Research Effort ◽  
Cross Flow ◽  
Acid Reflux ◽  
Growth Conditions ◽  
Laser Vaporization ◽  
Spectroscopic Techniques ◽  
Cross Flow Filtration

Since their discovery, carbon nanotubes have been the focus of much research effort aimed at optimizing growth conditions, elucidating physical structure, and measuring electronic properties. Measurement methods have included high resolution techniques such as AFM, STM, TEM, and EELS, as well as surface and bulk spectroscopic techniques, such as XPS. Most investigations have been quite specific, centering on a small number of nanotubes formed under particular growth conditions and typically employing only one or two modes of analysis. Broader, more systematic studies are relatively rare, and it is the intent of the present work to help fill this gap. We combine results of high-resolution TEM imaging, electron diffraction, low-energy EELS, and carbon K-edge EELS to characterize a variety of nanotube samples, grown and annealed under various conditions.The Carbon Nanotubes (Cnts) Are Made By The Dual, Pulsed-Laser Vaporization Method, And Purified With A Process That Involves Nitric Acid Reflux, Washing/Centrifugation Cycles, Hollow-Fiber, And Cross-Flow Filtration.

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