%0 Journal Article %1 Altkorn1999 %A Altkorn, Robert %A Koev, Ilia %A Pelletier, Michael J. %D 1999 %J Applied Spectroscopy %K %P 1169-1176 %T Raman Performance Characteristics of Teflon®-AF 2400 Liquid-Core Optical-Fiber Sample Cells %U http://www.opticsinfobase.org/as/abstract.cfm?URI=as-53-10-1169 %V 53 %X Several properties of Teflon®-AF liquid-core optical-fiber (LCOF) sample cells relevant to their utility in analytical Raman spectroscopy have been investigated. These include the nature and extent of cladding-related background and its effect on signal-to-noise ratio, and the dependence of intensity enhancement on LCOF length, core diameter, excitation wavelength, and scattering wavelength. Significant improvements in signal-to-noise ratio relative to conventional sampling techniques were demonstrated in LCOFs filled with dilute (6 X 10-2 M and 6 X 10-4 M) aqueous solutions of phenylalanine. A maximum intensity enhancement factor of approximately 120 was measured by using 50 mu m i.d. LCOFs filled with methanol and 532 nm excitation. Enhancement in 785 nm-excited spectra was found to vary with Raman shift in a manner consistent with self-absorption by high-overtone vibrational bands in the core liquid.

@article{Altkorn1999, abstract = {Several properties of Teflon®-AF liquid-core optical-fiber (LCOF) sample cells relevant to their utility in analytical Raman spectroscopy have been investigated. These include the nature and extent of cladding-related background and its effect on signal-to-noise ratio, and the dependence of intensity enhancement on LCOF length, core diameter, excitation wavelength, and scattering wavelength. Significant improvements in signal-to-noise ratio relative to conventional sampling techniques were demonstrated in LCOFs filled with dilute (6 X 10-2 M and 6 X 10-4 M) aqueous solutions of phenylalanine. A maximum intensity enhancement factor of approximately 120 was measured by using 50 mu m i.d. LCOFs filled with methanol and 532 nm excitation. Enhancement in 785 nm-excited spectra was found to vary with Raman shift in a manner consistent with self-absorption by high-overtone vibrational bands in the core liquid.}, added-at = {2011-10-01T01:07:43.000+0200}, author = {Altkorn, Robert and Koev, Ilia and Pelletier, Michael J.}, biburl = {https://www.bibsonomy.org/bibtex/27d339bbd96cee8cffb6d3702c94c5f05/afcallender}, file = {Altkorn1999.pdf:indexed\\Altkorn1999.pdf:PDF}, groups = {public}, interhash = {89cabddfc3a053aba4865abbdaa6ad38}, intrahash = {7d339bbd96cee8cffb6d3702c94c5f05}, journal = {Applied Spectroscopy}, keywords = {}, pages = {1169-1176}, timestamp = {2011-10-01T01:07:43.000+0200}, title = {Raman Performance Characteristics of Teflon®-AF 2400 Liquid-Core Optical-Fiber Sample Cells}, url = {http://www.opticsinfobase.org/as/abstract.cfm?URI=as-53-10-1169}, username = {afcallender}, volume = 53, year = 1999 }