Journal of Raman Spectroscopy

Cover image for Vol. 44 Issue 4

April 2013

Volume 44, Issue 4

Pages 509–649

  1. Research articles

    1. Top of page
    2. Research articles
    1. Comparison of the discriminating power of Raman and surface-enhanced Raman spectroscopy with established techniques for the examination of liquid and gel inks (pages 509–517)

      Steven E. J. Bell, Samantha P. Stewart, Yen Cheng Ho, Brian W. Craythorne and S. James Speers

      Version of Record online: 15 MAR 2013 | DOI: 10.1002/jrs.4202

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      A population study of blue and black liquid/gel inks comparing Raman methods with video spectral comparison and thin layer chromatography has showed that the discrimination power of Raman is similar to that of the established methods. This, combined with the convenience of Raman measurements, demonstrates that there is significant benefit in incorporating Raman methods early in document examination procedures.

    2. Visible light response of silver 4-aminobenzenethiolate and silver 4-dimethylaminobenzenethiolate probed by Raman scattering spectroscopy (pages 518–524)

      Kwan Kim, Seung Hun Lee, Kyung Lock Kim and Kuan Soo Shin

      Version of Record online: 28 NOV 2012 | DOI: 10.1002/jrs.4225

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      The Raman scattering characteristics of silver 4-aminobenzenethiolate (Ag-4ABT) and silver 4-dimethylaminobenzenethiolate compounds were investigated to determine whether certain peaks that are identifiable in the surface-enhanced Raman scattering spectrum of 4-ABT but absent in its normal Raman spectrum were also apparent in the Ag salt spectra.

    3. Experimental investigations on the weakening effect of magnetic fields on surface-enhanced Raman scattering (pages 525–530)

      Ran Li, Qian-Wang Chen, Hao Zhang, Xiang-Kai Kong, Yu-Bing Sun, Hao Zhong, Hui Wang and Shuai Zhou

      Version of Record online: 6 DEC 2012 | DOI: 10.1002/jrs.4227

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      The effect of magnetic fields (MFs) on surface-enhanced Raman scattering (SERS) was detected using Au hollow spheres (HSs) as Raman substrates. From the picture, it can be seen that the SERS spectrum of Au HSs without an external MF is obviously stronger than those with an external MF, and the increase of MF intensity is negative correlation with the increase of SERS intensity

    4. A surface enhanced Raman spectroscopic study of interactions between casein and polymethoxyflavones (pages 531–535)

      Lili He, Jinkai Zheng, Theodore P. Labuza and Hang Xiao

      Version of Record online: 14 DEC 2012 | DOI: 10.1002/jrs.4229

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      We demonstrated the distinct selectivity of molecular interactions between casein and three structurally closely related polymethoxyflavones using surface-enhanced Raman spectroscopy

    5. Separation followed by direct SERS detection of explosives on a novel black silicon multifunctional nanostructured surface prepared in a microfluidic channel (pages 536–539)

      Ivan Talian and Jörg Huebner

      Version of Record online: 21 DEC 2012 | DOI: 10.1002/jrs.4237

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      Separation of two common explosives components followed by surface enhanced Raman spectroscopy detection performed on nanostructured surface is described.

    6. Raman scattering enhancement by dielectric spheres (pages 540–543)

      Juan F. Cardenas

      Version of Record online: 28 JAN 2013 | DOI: 10.1002/jrs.4240

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      Raman scattering experiments performed on dielectric sphere covered Si (60nm)/metal/substrate structures were semi-quantitatively accounted for by the calculated, using finite difference time domain calculations, electric energy density distributions.

    7. Two-dimensional stimulated ultraviolet resonance Raman spectra of tyrosine and tryptophan: a simulation study (pages 544–559)

      Hao Ren, Jason D. Biggs and Shaul Mukamel

      Version of Record online: 18 MAR 2013 | DOI: 10.1002/jrs.4210

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      Two-pulse one-dimensional and three-pulse two-dimensional stimulated resonance Raman spectra are simulated to reveal the inter-mode correlation of l-tyrosine, l-tryptophan, and trans-l-tyrosine-l-tryptophan dipeptide. The two-dimensional stimulated resonance Raman technique is more sensitive to the coupling of residues than spontaneous Raman.

    8. Colour diversification in octocorals based on conjugated polyenes: A Raman spectroscopic view (pages 560–566)

      Lenize F. Maia, Vanessa E. de Oliveira, Maria E. R. Oliveira, Felipe D. Reis, Beatriz G. Fleury, Howell G. M. Edwards and Luiz F. C. de Oliveira

      Version of Record online: 21 DEC 2012 | DOI: 10.1002/jrs.4226

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      In this work Raman spectroscopy has been used for evaluating colour diversification in octocorals tissues. Bands at ca. 1500 ν1(C=C) and ν2 (C–C) 1130 cm−1 were attributed to polyenals inserted into red and yellow sclerites endogenously produced by octocorals, whereas bands at ca. 1520 ν1(C=C), 1160 ν2 (C–C) and ρ(C–CH3) 1006 cm−1 were assigned to the carotenoid astaxanthin transferred to octocorals through food web. Pigments derived from polyenes were successfully identified either in in situ analysis or crude extracts.

    9. Spectroscopic characterization of cadion: UV–vis, resonance Raman and DFT calculations of a versatile metal complexing agent (pages 567–572)

      Luiz F. Lepre, Fabiana Inoue, Paola Corio, Paulo S. Santos and Rômulo A. Ando

      Version of Record online: 21 DEC 2012 | DOI: 10.1002/jrs.4228

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      It is presented the resonance Raman characterization of cadion as neutral and anionic species and of its complexes with Hg2+, Cd2+ and Ni2+. The distinct resonance enhancement profiles show how Raman spectroscopy can be used to distinguish toxic metals by the proper choice of the excitation wavelength.

    10. CW measurements of resonance Raman profiles, line-widths, and cross-sections of fluorescent dyes: application to Nile Blue A in water and ethanol (pages 573–581)

      Antoine Reigue, Baptiste Auguié, Pablo G. Etchegoin and Eric C. Le Ru

      Version of Record online: 25 JAN 2013 | DOI: 10.1002/jrs.4233

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      A detailed study of Nile Blue in water and ethanol is used to illustrate the power of recent advances in resonance Raman spectroscopy of highly fluorescent samples, using continuous wave excitation and standard spectrometers.

    11. Resonance Raman spectroscopic and density functional theory investigation of the excited state structural dynamics of 2-mercapto-1-methylimidazole (pages 582–589)

      Ji-Wen Jian, Hai-Bo Zhang, Cong-Qi Chen, Yanying Zhao and Xuming Zheng

      Version of Record online: 28 DEC 2012 | DOI: 10.1002/jrs.4238

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      The use resonance Raman spectroscopy enables us to reveal the differences in the dynamic structures of 2-mercapto-1-methylimidazole (MMI) and thiourea. Very strong π conjugation of the C=S group with the aromatic heterocyclic ring of MMI retards the pyramidalization of the carbon of the C=S group and favors the intra-molecular proton transfer reaction.

    12. High-resolution stimulated Raman spectroscopy and analysis of the ν15 (C–H) stretching dyad of C2H4 (pages 590–596)

      H. Aouididi, M. Rotger, D. Bermejo, R.Z. Martínez and V. Boudon

      Version of Record online: 7 DEC 2012 | DOI: 10.1002/jrs.4224

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      The high-resolution stimulated Raman spectra of the ν15 C–H stretching bands of C2H4 have been recorded and analyzed by means of the tensorial formalism developed in Dijon for X2Y4 asymmetric-top molecules. A total of 689 lines (428 for ν5 and 261 for ν1) were assigned and fitted as a dyad including Coriolis coupling constants. We obtained a global root mean square deviation of 4.4 × 10−3 cm−1.

    13. Raman spectroscopy as a probe of molecular order, orientation, and stacking of fluorinated copper-phthalocyanine (F16CuPc) thin films (pages 597–607)

      F. Cerdeira, M. Garriga, M. I. Alonso, J. O. Ossó, F. Schreiber, H. Dosch and M. Cardona

      Version of Record online: 10 JAN 2013 | DOI: 10.1002/jrs.4231

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      The azimuthal dependence of the Raman intensity of well-characterised vibration modes in crystalline F16CuPc films is used to obtain quantitative structural parameters of the films. The best ordered film provides an improved reference for the Raman spectra of F16CuPc.

    14. A new paradigm for signal processing of Raman spectra using a smoothing free algorithm: Coupling continuous wavelet transform with signal removal method (pages 608–621)

      Ahmad Esmaielzadeh Kandjani, Matthew J. Griffin, Rajesh Ramanathan, Samuel J. Ippolito, Suresh K. Bhargava and Vipul Bansal

      Version of Record online: 25 JAN 2013 | DOI: 10.1002/jrs.4232

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      In this research, we show a new smoothing-free algorithm for background correction of noisy Raman spectra by combining continuous wavelet transform (CWT) and signal removal method (SRM) approaches. In this approach, the CWT is applied to detect the peak characteristics while the latter is used to remove the peak components and estimating background of the spectrum. The application of the current algorithm on Raman spectra showed the ability to estimate background with accuracy of 94% with RMSE lower than 0.2.

    15. Temporal filtering with fast ICCD cameras in Raman studies (pages 622–629)

      A. Ehn, M. Levenius, M. Jonsson, M. Aldén and J. Bood

      Version of Record online: 6 MAR 2013 | DOI: 10.1002/jrs.4235

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      Reduction of interfering fluorescence in spontaneous Raman imaging utilizing the temporal domain is demonstrated and evaluated where off-the-shelf ICCD cameras, Kerr gates and streak cameras are compared as detectors for temporal filtering. An evaluation method is presented that can serve as a guideline for conducting temporal filtering of interfering fluorescence in Raman measurements.

    16. Characteristics of the Raman spectra of archaeological Malachites (pages 630–636)

      Bing-Sheng Yu, Jiann-Neng Fang and En-Ping Huang

      Version of Record online: 14 DEC 2012 | DOI: 10.1002/jrs.4230

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      Archaeological malachite show weakening of bands in the order of OH stretch (3300 cm−1, most severe) CO3 (600– 1500 cm−1) and CuO (<600 cm−1, less severe), indicating successive stage of corrosion. These malachites are generally blackened in less than 1 min with Ar laser at 25 mW, with loss of 1 or 3 3300 cm−1 OH bands in 10 min. The malachites of natural minerals are blackened in 10 min without losing any 3300 cm−1 bands in 16 min.

    17. Atacamite as a natural pigment in a South American colonial polychrome sculpture from the late XVI century (pages 637–642)

      Eugenia P. Tomasini, Carlos Rúa Landa, Gabriela Siracusano and Marta S. Maier

      Version of Record online: 26 DEC 2012 | DOI: 10.1002/jrs.4234

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      This work shows the great potential of Raman spectroscopy in the characterization of pigments and their source. This work presents a Raman investigation combined with scanning electron microscopy-energy dispersive spectroscopy analysis of the green pigment and the gilding technique in an Andean polychrome sculpture of the 16th century. Mineral atacamite was identified as the green pigment used in the decoration of the veil of the sculpture. Identification of a preparation layer of gypsum and a layer of bole to attach the gold leaf indicated the technique of water gilding, traditionally used for wood surfaces.

      This is the first report on the use of atacamite as a pigment in colonial art.

    18. Characterization of microcrystals in some ancient glass beads from china by means of confocal Raman microspectroscopy (pages 643–649)

      H.X. Zhao, Q.H. Li, S. Liu and F.X. Gan

      Version of Record online: 25 FEB 2013 | DOI: 10.1002/jrs.4239

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      A total of ten ancient glasses were analyzed by confocal Raman microspectroscopy for the non-destructive identification of microcrystals within them. For the first time, tin and antimony-based opacifiers/colorants were identified in nine samples as well as other crystalline phases. Another interesting phenomenon first observed was the coexistence of Sb- and Sn-based opacifiers/colorants in one mosaic bead from Guangxi. The possibility to use Sb- and Sn-based opacifiers/colorants for dating and provenance study of ancient glass found in China is discussed briefly.