Journal of Raman Spectroscopy

Cover image for Vol. 41 Issue 8

August 2010

Volume 41, Issue 8

Pages 839–906

Issue edited by: A. M. Zheltikov, P Radi

  1. Editorials

    1. Top of page
    2. Editorials
    3. Research Articles
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  2. Research Articles

    1. Top of page
    2. Editorials
    3. Research Articles
    1. Two-beam multiplexed CARS based on a broadband oscillator (pages 840–847)

      Kentaro Furusawa, Norihiko Hayazawa and Satoshi Kawata

      Version of Record online: 19 FEB 2010 | DOI: 10.1002/jrs.2620

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      Delay-dependent three-colour CARS spectra for a powder form of adenine is obtained via epi-detection by using compressed pulses directly from a broadband laser oscillator without use of any photonic crystal fibres.

    2. Nonlinear optical microscopy for drug delivery monitoring and cancer tissue imaging (pages 848–852)

      Rabah Mouras, G. Rischitor, A. Downes, D. Salter and A. Elfick

      Version of Record online: 11 MAR 2010 | DOI: 10.1002/jrs.2622

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      A multimodal nonlinear optical microscope that combines coherent anti-Stokes Raman scattering (CARS), two-photon excitation fluorescence (TPEF), second-harmonic generation (SHG) and sum-frequency generation (SFG) was developed and applied to image MCF-7 breast cancer tissue and cells as well as monitoring anticancer drug delivery in live cells. TPEF imaging showed that drugs are preferentially localized in the cytosol and the nuclear envelope in resistant cells. Moreover, the extracellular matrix was observed by TPEF signals arising from elastin's autofluorescence and SHG signals from collagen fibrils in breast tissue sections.

    3. Degenerate and two-color resonant four-wave mixing of C2 in a molecular beam environment (pages 853–858)

      Marek Tulej, Gregor Knopp, Thomas Gerber and Peter P. Radi

      Version of Record online: 17 MAR 2010 | DOI: 10.1002/jrs.2638

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      We demonstrate that degenerate and two-color resonant four-wave mixing spectroscopy is applicable for the sensitive and selective characterization of negative ions in a molecular beam environment. Results are shown for Cequation image which is produced by discharging a mixture of acetylene and argon prior to supersonic expansion.

    4. Cooperative optical effects in volumes embedded in layered media (pages 859–865)

      E. Nichelatti, M. Marrocco and R. M. Montereali

      Version of Record online: 18 MAR 2010 | DOI: 10.1002/jrs.2648

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      The classical theories of electromagnetic radiation from a point source and of partial coherence are joined into a unified formalism to evaluate light emission from a volume seen as a collection of point sources embedded in a layered medium. The formalism leads to the relevant advantage of analytical results for the power radiated outside the medium. The possibility and convenience of using the theory to model microCARS imaging are illustrated and discussed.

    5. Surface-enhanced Raman spectroscopy for trace-level detection of explosives (pages 866–869)

      S. Botti, L. Cantarini and A. Palucci

      Version of Record online: 29 MAR 2010 | DOI: 10.1002/jrs.2649

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      In this paper, SERS was applied to trace-level detection of explosives. Usually, a high signal-to-noise spectrum, suitable for identification of explosive molecules down to few hundreds of picograms, was achieved within 30 s. These findings confirm the sensitivity and specificity of SERS analysis, enabling its exploitation in a practical detection instrument for routine analysis of security and forensic diagnostics.

    6. CARS thermometry revisited in lightof the intramolecular perturbation (pages 870–874)

      Michele Marrocco

      Version of Record online: 21 APR 2010 | DOI: 10.1002/jrs.2662

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      The vibration-rotation interaction is responsible for the failure of the rigid rotor approximation in CARS thermometry. Spectral amplitudes of vibrational N2 spectra vary as in the figure and they leads to temperature corrections on the same order of the thermometric accuracy.

    7. Rotational CARS N2 thermometry: validation experiments for the influence of nitrogen spectral line broadening by hydrogen (pages 875–881)

      Alexis Bohlin, Fredrik Vestin, Jeanine Bonamy, Pierre Joubert and Per-Erik Bengtsson

      Version of Record online: 20 APR 2010 | DOI: 10.1002/jrs.2663

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      Rotational CARS temperature measurements have been performed in binary mixtures of N2 and H2 at 300, 500 and 700 K. Evaluation using pure self-broadened N2[BOND]N2 Raman line widths clearly underestimated the real temperatures, but, by inclusion of N2[BOND]H2 Raman line widths properly weighted by the concentration, improved temperature estimations were obtained.

    8. Vectorial descriptions of nonlinear Raman microscopy (pages 882–889)

      Michele Marrocco

      Version of Record online: 25 APR 2010 | DOI: 10.1002/jrs.2672

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      The vectorial problem of coherent Raman interaction (coherent anti-Stokes Raman scattering and stimulated Raman scattering) between tightly focused electric fields and matter placed at the focus of a microscope is analyzed in reference to two simplified approaches, respectively based on the three-dimensional Gaussian approximation and the method of discrete diffraction (see the figure for an example of angular distribution of coherent Raman radiation emitted by a sphere of three different sizes).

    9. CARS temperature measurement in a LOX/CH4 spray flame (pages 890–896)

      V. I. Fabelinsky, V. V. Smirnov, O. M. Stel'makh, K. A. Vereschagin, W. Clauss, C. Manfletti, J. Sender and M. Oschwald

      Version of Record online: 20 MAY 2010 | DOI: 10.1002/jrs.2696

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      Spatial temperature distribution in a LOX/CH4 spray flame was measured in the windowed combustion chamber of the DLR M3 test facility. Single-shot broadband CARS spectra with simultaneous detection of the Q-branches of H2 and H2O molecules were recorded. Temperature was deduced from the H2 and H2O CARS profiles.

    10. CARS investigation of collisional shift of the hydrogen Q-branch transitions by water at high temperatures (pages 897–901)

      K. A. Vereschagin, A. K. Vereschagin, V. V. Smirnov, O. M. Stel'makh, V. I. Fabelinsky, W. Clauss and M. Oschwald

      Version of Record online: 12 MAY 2010 | DOI: 10.1002/jrs.2697

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      By means of CARS interferometric line-shape spectroscopy, the temperature dependences of lineshift coefficients for several Q-branch lines of hydrogen molecules under collisions with water molecules were determined in the temperature range of 2100 < T < 3500 K.

    11. Single-shot CARS thermometry of high-pressure hydrocarbon flames using simultaneous intensity and linewidth measurements (pages 902–906)

      K. A. Vereschagin, V. V. Smirnov, O. M. Stel'makh, V. I. Fabelinsky, W. Clauss and M. Oschwald

      Version of Record online: 12 MAY 2010 | DOI: 10.1002/jrs.2698

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      We demonstrate the feasibility of single-shot CARS thermometry with simultaneous measurement of intensities of hydrogen Q-branch lines and their linewidths in a pulsed CH4/O2 combustion chamber operating at 20 MPa pressure and 3000 K temperature that are typical for full-scale rocket engines.

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