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Titolo:
UV RAMAN MICROSPECTROSCOPY - SPECTRAL AND SPATIAL SELECTIVITY WITH SENSITIVITY AND SIMPLICITY
Autore:
PAJCINI V; MUNRO CH; BORMETT RW; WITKOWSKI RE; ASHER SA;
Indirizzi:
UNIV PITTSBURGH,DEPT CHEM PITTSBURGH PA 15260 UNIV PITTSBURGH,DEPT CHEM PITTSBURGH PA 15260
Titolo Testata:
Applied spectroscopy
fascicolo: 1, volume: 51, anno: 1997,
pagine: 81 - 86
SICI:
0003-7028(1997)51:1<81:URM-SA>2.0.ZU;2-G
Fonte:
ISI
Lingua:
ENG
Soggetto:
ULTRAVIOLET RESONANCE RAMAN; POLYCYCLIC AROMATIC-HYDROCARBONS; EXCITED ELECTRONIC STATES; SINGLE LIVING CELLS; SATURATION SPECTROSCOPY; EXCITATION PROFILES; LASER EXCITATION; SPECTROGRAPH; SPECTROMETER; TRYPTOPHAN;
Keywords:
UV RAMAN SPECTROSCOPY; MICROSPECTROSCOPY; DIAMOND; EUKARYOTIC CELL; DNA; SPATIAL RESOLUTION; HIGH EFFICIENCY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
43
Recensione:
Indirizzi per estratti:
Citazione:
V. Pajcini et al., "UV RAMAN MICROSPECTROSCOPY - SPECTRAL AND SPATIAL SELECTIVITY WITH SENSITIVITY AND SIMPLICITY", Applied spectroscopy, 51(1), 1997, pp. 81-86

Abstract

The high sensitivity, selectivity, spatial resolution, and ease of operation of UV Raman microspectroscopy is demonstrated with the use of a new highly efficient UV Raman microspectrometer with excitation at 244 nm. Single spectrograph dispersion combined with special new filters for the rejection of Rayleigh scattering improves the throughput efficiency by a factor of approximately 4 in comparison to a triple-stagespectrograph. The instrument has a spatial resolution of approximately 3 mu m x 9 mu m in the lateral (X-Y) plane, and 10 mu m or less in the axial (Z) plane. UV resonance Raman spectra of nucleic acids are selectively excited from spatially resolved areas of a single parameciumby using low continuous-wave (cw) excitation powers and short accumulation times to minimize sample damage. High signal-to-noise Raman spectra are excited from spatially resolved areas of chemical-vapor-deposited (CVD) diamond films. We demonstrate, for the first time, the ability to probe the spatial distribution of the nondiamond carbon impurities in CVD diamond films. The amorphous carbon band at similar to 1553 cm(-1) is resolved from the normally broad similar to 1600-cm(-1) nondiamond carbon band.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 19/09/20 alle ore 11:51:30