Formation of quantum structures on a single nanotube by modulating hydrogen adsorption
Author
Gülseren, O.
Yildirim, T.
Çıracı, Salim
Date
2003Source Title
Physical Review B - Condensed Matter and Materials Physics
Print ISSN
0163-1829
Publisher
American Physical Society
Volume
68
Issue
11
Pages
1154191 - 1154196
Language
English
Type
ArticleItem Usage Stats
133
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views
80
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downloads
Abstract
Using first-principles density functional calculations we showed that quantum structures can be generated on a single carbon nanotube by modulating the adsorption of hydrogen atoms. The band gap of the hydrogen-free zone of the tube widens in the adjacent hydrogen covered zone. The sudden variation of the band gap leads to band offsets at the conduction- and valence-band edges. At the end, the band gap of the whole system is modulated along the axis of the tube, which generates quantum wells or quantum dots. Specific electronic states are confined in these quantum wells. The type and radius of the nanotube and the extent and sequence of hydrogen-free and hydrogen-covered zones can provide several options to design a desired optoelectronic nanodevice.
Keywords
CarbonHydrogen
Adsorption
Article
Calculation
Electronics
Energy
Hydrogenation
Model
Nanotechnology
Nanotube
Quantum dot
Quantum mechanics
Quantum structure
Quantum well
Single wall carbon nanotube
Permalink
http://hdl.handle.net/11693/24438Collections
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