Picosecond transient Raman spectroscopy: The photoisomerization of trans‐stilbene

1983 ◽  
Vol 79 (4) ◽  
pp. 1559-1564 ◽  
Author(s):  
T. L. Gustafson ◽  
D. M. Roberts ◽  
D. A. Chernoff
Keyword(s):  
Raman Spectroscopy ◽  
Trans Stilbene

Liquid Core Optical Fibers in Raman Spectroscopy

1981 ◽  
Vol 35 (4) ◽  
pp. 439-442 ◽  
Author(s):  
Howard B. Ross ◽  
William M. McClain
Keyword(s):  
Raman Spectroscopy ◽  
Raman Spectra ◽  
Optical Fibers ◽  
Liquid Core ◽  
Geometrical Optics ◽  
Laser Spectrometer ◽  
Trans Stilbene ◽  
Scan Speed ◽  
Good Agreement

Raman spectra of samples contained in hollow quartz fibers are compared quantitatively to conventional Raman spectra using identical laser, spectrometer, detector, and scan speed. We find the fiber signal to be enhanced by a factor of 250/m of fiber, in good agreement with calculations based on geometrical optics. A fiber spectrum of 2 mol% trans-stilbene in benzene is good enough to allow essentially perfect solvent subtraction.

Unraveling Molecular Adsorption with Surface Raman Spectroscopy: trans-Stilbene, trans,trans-Distyrylbenzene, and trans-Azobenzene on Ag/Ge(111)

2010 ◽  
Vol 115 (2) ◽  
pp. 516-520 ◽  
Author(s):  
Li-Wei Chou ◽  
Ya-Rong Lee ◽  
Jyh-Chiang Jiang ◽  
Jiing-Chyuan Lin ◽  
Juen-Kai Wang
Keyword(s):  
Raman Spectroscopy ◽  
Molecular Adsorption ◽  
Trans Stilbene ◽  
Trans Azobenzene

Surface Raman Spectroscopy of trans-Stilbene on Ag/Ge(111): Surface-Induced Effects

2008 ◽  
Vol 113 (1) ◽  
pp. 208-212 ◽  
Author(s):  
Li-Wei Chou ◽  
Ya-Rong Lee ◽  
Ching-Ming Wei ◽  
Jyh-Chiang Jiang ◽  
Jiing-Chyuan Lin ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Trans Stilbene

scholarly journals Simple Defocused Fiber Optic Volume Probe for Subsurface Raman Spectroscopy in Turbid Media

2019 ◽  
Vol 74 (1) ◽  
pp. 88-96
Author(s):  
Anders Runge Walther ◽  
Morten Østergaard Andersen ◽  
Christine Kamstrup Dam ◽  
Frederikke Karlsson ◽  
Martin Aage Barsøe Hedegaard
Keyword(s):  
Raman Spectroscopy ◽  
Fiber Optic ◽  
Ex Vivo ◽  
Turbid Media ◽  
In Vivo Studies ◽  
Trans Stilbene ◽  
Simple Alternative ◽  
Spectral Intensities ◽  
Sample Distance

We investigated the ability to perform deep subsurface Raman spectroscopy in turbid media using a simple fiber optic volume probe. Being able to collect Raman signals from regions deep within a biological sample provides the ability to noninvasively study underlying living tissue and tissue engineered constructs with high chemical specificity. Spatially offset Raman spectroscopy has shown great potential for obtaining subsurface Raman signals in biological samples. The applicability of the method for in vivo studies depends on the system complexity and small size probes are often desirable. Most real-time studies on human patients utilizing Raman spectroscopy have been performed with easy-to-handle miniaturized probes. Here we show both experimentally and theoretically that the sampling depth from a simple volume probe can be controlled by changing the probe to sample distance effectively suppressing Raman and fluorescence contributions from shallow sample layers while favoring the collection of signals from deeper layers. Relative spectral intensities as function of probe to sample distance were investigated for layered phantoms of poly(methyl methacrylate) and trans-stilbene and compared with theory. The volume probe was then utilized for the collection of spectra from phantoms mimicking in vivo transcutaneous measurement configurations of bone and engineered scaffold as well as from an ex vivo sample of bone and soft tissue. Together the results show that Raman fiber optic volume probes can be utilized for subsurface Raman spectroscopy in turbid media, providing a simple alternative to spatially offset Raman systems for, e.g., noninvasive monitoring and studying mineralized tissue and implanted scaffolds in vivo.

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