Document Detail

Identification of Nitrogen Defects in Diamond with Photoluminescence Excited in the Region 160-240 nm.
MedLine Citation:
PMID:  23043239     Owner:  NLM     Status:  Publisher    
Photoluminescence (PL) spectra of natural diamond powders of type IaAB at 300 and 13 K were excited with synchrotron radiation in the wavelength range 150-260 nm. The spectral features observed in the excitation spectra at 13 K show four vibrational progressions -- A, B, B' and N3 related to nitrogen defects in diamond. Progression A has a spacing 125840 cm-1 associated with the N2 (or A) center, progressions B has spacing 118140 cm-1 and B' 74440 cm-1 related to the N4 (or B) center, and progression N3 has a spacing 141740 cm-1 associated with the N3 center. The PL of these defects comprise continuous emission with two broad lines with maxima about 420 nm and 469 nm at 300 K. Upon excitation with light at wavelength less than 200 nm, the distinct zero-phonon lines of N3 and N4 centers in diamond at temperature 13 K become prominent at 416.0 and 491.2 nm, respectively. The vibrational progressions in PL excitation spectra of N2, N3, and N4 centers in diamond of type IaAB at 13 K are identified for the first time. We suggest the use of PL spectra excited in the region 160-240 nm to analyze and to identify the type of diamond.
Hsiao-Chi Lu; Meng-Yeh Lin; Sheng-Lung Chou; Yu-Chain Peng; Jen-Iu Lo; Bing-Ming Cheng
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-10-9
Journal Detail:
Title:  Analytical chemistry     Volume:  -     ISSN:  1520-6882     ISO Abbreviation:  Anal. Chem.     Publication Date:  2012 Oct 
Date Detail:
Created Date:  2012-10-9     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0370536     Medline TA:  Anal Chem     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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