Raman spectroscopy and time-resolved photoluminescence of BN and BxCyNz nanotubes

Journal Article · Wed Jan 21 00:00:00 EST 2004

OSTI ID:842516

Wu, J; Han, Wei-Qiang; Walukiewicz, W; Ager, III, J W; Shan, W; Haller, E E; Zettl, A

We report Raman and time-resolved photoluminescence spectroscopic studies of multiwalled BN and B{sub x}C{sub y}N{sub z} nanotubes. The Raman spectroscopy shows that the as-grown B{sub x}C{sub y}N{sub z} charge recombination, respectively. Comparison of the photoluminescence of BN nanotubes to that decay process is characterized by two time constants that are attributed to intra- and inter-BN sheet nanotubes as predicted by theory. nanotubes are radially phase separated into BN shells and carbon shells. The photoluminescence of hexagonal BN is consistent with the existence of a spatially indirect band gap in multi-walled BN.

• Research Organization: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
• Sponsoring Organization: USDOE Director. Office of Science. Office of Basic Energy Sciences. Materials Science and Engineering Division
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 842516
• Report Number(s): LBNL-54367; R&D Project: 513360; TRN: US200516%%70
• Resource Relation: Other Information: Journal Publication Date: 04/2004
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CARBON
DECAY
NANOTUBES
PHOTOLUMINESCENCE
RAMAN SPECTROSCOPY
RECOMBINATION