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DOI	10.1126/science.1110265
	The optical resonances in carbon nanotubes arise from excitons
	Wang F.; Dukovic G.; Brus L.E.; Heinz T.F.
发表日期	2005
ISSN	0036-8075
起始页码	838
结束页码	841
卷号	308 期号:5723
英文摘要	Optical transitions in carbon nanotubes are of central importance for nanotube characterization. They also provide insight into the nature of excited states in these one-dimensional systems. Recent work suggests that light absorption produces strongly correlated electron-hole states in the form of excitons. However, it has been difficult to rule out a simpler model in which resonances arise from the van Hove singularities associated with the one-dimensional bond structure of the nanotubes. Here, two-photon excitation spectroscopy bolsters the exciton picture. We found binding energies of ∼400 millielectron volts for semi-conducting single-walled nanotubes with 0.8-nanometer diameters. The results demonstrate the dominant role of many-body interactions in the excited-state properties of one-dimensional systems.
英文关键词	Binding energy; Chemical bonds; Excitons; Light absorption; Photons; Resonance; Spectroscopic analysis; Excitation spectroscopy; Optical resonances; Optical transition; Van Hove singularities; Carbon nanotubes; carbon nanotube; exciton; unclassified drug; chemistry; physics; article; atomic particle; light absorption; molecular interaction; photon; priority journal; semiconductor
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/245945
作者单位	Depts. of Phys. and Elec. Eng., Columbia University, 538 West 120th Street, New York, NY 10027, United States; Department of Chemistry, Columbia University, 538 West 120th Street, New York, NY 10027, United States
推荐引用方式 GB/T 7714	Wang F.,Dukovic G.,Brus L.E.,et al. The optical resonances in carbon nanotubes arise from excitons[J],2005,308(5723).
APA	Wang F.,Dukovic G.,Brus L.E.,&Heinz T.F..(2005).The optical resonances in carbon nanotubes arise from excitons.Science,308(5723).
MLA	Wang F.,et al."The optical resonances in carbon nanotubes arise from excitons".Science 308.5723(2005).