scholarly journals Optical absorption and electron energy loss spectra of carbon and boron nitride nanotubes: a first-principles approach

2004 ◽  
Vol 78 (8) ◽  
pp. 1157-1167 ◽  
Author(s):  
A.G. Marinopoulos ◽  
L. Wirtz ◽  
A. Marini ◽  
V. Olevano ◽  
A. Rubio ◽  
...  
Keyword(s):  
Boron Nitride ◽  
Optical Absorption ◽  
Energy Loss ◽  
Electron Energy ◽  
First Principles ◽  
Boron Nitride Nanotubes ◽  
Electron Energy Loss ◽  
Electron Energy Loss Spectra

Optical Gap Measurements on Individual Boron Nitride Nanotubes by Electron Energy Loss Spectroscopy

2008 ◽  
Vol 14 (3) ◽  
pp. 274-282 ◽  
Author(s):  
Raul Arenal ◽  
Odile Stéphan ◽  
Mathieu Kociak ◽  
Dario Taverna ◽  
Annick Loiseau ◽  
...  
Keyword(s):  
Boron Nitride ◽  
Energy Loss ◽  
Electron Energy ◽  
Electron Energy Loss Spectroscopy ◽  
Hexagonal Boron Nitride ◽  
Boron Nitride Nanotubes ◽  
Electromagnetic Response ◽  
Optical Gap ◽  
Spatially Resolved ◽  
Electron Energy Loss

AbstractElectromagnetic response of individual boron nitride nanotubes (BNNTs) has been studied by spatially resolved electron energy loss spectroscopy (EELS). We demonstrate how dedicated EELS methods using subnanometer electron probes permit the analysis of local dielectric properties of a material on a nanometer scale. The continuum dielectric model has been used to analyze the low-loss EEL spectra recorded from these tubes. Using this model, we demonstrate the weak influence of the out-of-plane contribution to the dielectric response of BNNTs. The optical gap, which can be deduced from the measurements, is found to be equal to 5.8 ± 0.2 eV, which is close to that of the hexagonal boron nitride. This value is found to be independent of the nanotubes configuration (diameter, helicity, number of walls, and interaction between the different walls).

Optical Absorption and Electron-Energy-Loss Spectra of Helium Microbubbles in Aluminum

1981 ◽  
Vol 46 (18) ◽  
pp. 1220-1223 ◽  
Author(s):  
J. C. Rife ◽  
S. E. Donnelly ◽  
A. A. Lucas ◽  
J. M. Gilles ◽  
J. J. Ritsko
Keyword(s):  
Optical Absorption ◽  
Energy Loss ◽  
Electron Energy ◽  
Electron Energy Loss ◽  
Electron Energy Loss Spectra

VUV optical-absorption and near-threshold electron energy-loss spectra of pyrazole

2003 ◽  
Vol 367 (5-6) ◽  
pp. 517-522 ◽  
Author(s):  
I.C Walker ◽  
M.H Palmer ◽  
M.-J Hubin-Franskin ◽  
J Delwiche
Keyword(s):  
Optical Absorption ◽  
Energy Loss ◽  
Electron Energy ◽  
Electron Energy Loss ◽  
Electron Energy Loss Spectra ◽  
Near Threshold
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