Journal of Raman Spectroscopy

Cover image for Vol. 43 Issue 3

March 2012

Volume 43, Issue 3

Pages 351–467

  1. Research Articles

    1. Top of page
    2. Research Articles
    3. Short Communications
    1. Confocal Raman microscopy for monitoring the membrane polymerization and thermochromism of individual, optically trapped diacetylenic phospholipid vesicles (pages 351–359)

      Jonathan J. Schaefer, Christopher B. Fox and Joel M. Harris

      Version of Record online: 14 OCT 2011 | DOI: 10.1002/jrs.3050

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      Individual phospholipid vesicles, with membranes containing diacetylene functional groups in the acyl chains, were optically trapped and polymerized by a UV lamp, while observing structural changes in the vesicle bilayer using confocal Raman microscopy. Time-dependent changes in the Raman spectra revealed the kinetics of the polymerization reaction and formation of two distinct polymer forms. Thermochromic behavior of the two polymer forms was investigated from temperature-dependent changes in the Raman spectra of a polymerized vesicle.

    2. A volume-exclusion normalization procedure for quantitative Raman confocal microspectroscopy of immersed samples applied to human embryonic stem cells (pages 360–369)

      H. Georg Schulze, Stanislav O. Konorov, Kadek Okuda, James M. Piret, Michael W. Blades and Robin F. B. Turner

      Version of Record online: 14 OCT 2011 | DOI: 10.1002/jrs.3045

      Thumbnail image of graphical abstract

      We present here a method to normalize spectra as well as estimate sample thicknesses based on a reference component present in the basal cell culture medium when we perform spectroscopy on colonies of living cells.

    3. Surface-enhanced Raman scattering-based approach for DNA detection at low concentrations via polyvinyl alcohol-protected silver grasslike patterns (pages 370–379)

      Renming Liu, Shuangmei Zhu, Minzhen Si, Zhenquan Liu and Deqing Zhang

      Version of Record online: 15 OCT 2011 | DOI: 10.1002/jrs.3040

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      PVA-Ag GPs grown on the surface of the common Al substrate obtained by electrochemical deposition is used as active SERS substrate in the analysis of DNA. The activity of this substrate is checked by recording the SERS spectra of thymine solutions with different concentrations.

    4. Cross-section and selection rules in surface-enhanced hyper Raman scattering (pages 380–388)

      A. M. Polubotko and V. P. Smirnov

      Version of Record online: 2 AUG 2011 | DOI: 10.1002/jrs.3032

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      The paper presents a general expression for the surface-enhanced hyper Raman cross-section of symmetrical molecules and selection rules for their contributions. Analysis of the SEHR spectra of pyrazine and pyridine allowed us to explain all their features.

    5. The distributions of enhancement factors in close-packed and nonclose-packed surface-enhanced Raman substrates (pages 389–395)

      Ying Fang, Hongta Yang, Peng Jiang and Dana D. Dlott

      Version of Record online: 20 SEP 2011 | DOI: 10.1002/jrs.3046

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      A method employing photochemical hole-burning is used to compare the Raman enhancement distributions of benzenethiol adsorbed on substrates optimized for 532 nm laser excitation, consisting of close-packed or nonclose-packed nanospheres. The close-packed substrate has a small number of sites with enhancements in the 108–1010 range not present on the nonclose-packed substrate.

    6. Surface-enhanced Raman scattering on silver dendrite with different growth directions (pages 396–404)

      Hongyan Xu, Mingwang Shao, Tao Chen, Yi Zhao and Shuit-Tong Lee

      Version of Record online: 20 SEP 2011 | DOI: 10.1002/jrs.3042

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      Ag dendrites with different growth direction exhibited different surface- enhanced Raman scattering effect: the Ag dendrites growing along [100] direction have the best effect; the ones with [111] direction the middle, and the ones with [110] direction the worst.

    7. Identification of minerals and organic materials in Middle Eocene ironstones from the Bahariya Depression in the Western Desert of Egypt by means of micro-Raman spectroscopy (pages 405–410)

      Valerian Ciobotă, Walid Salama, Nicolae Tarcea, Petra Rösch, Mourtada El Aref, Reinhard Gaupp and Jürgen Popp

      Version of Record online: 20 SEP 2011 | DOI: 10.1002/jrs.3047

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      Four types of shallow marine iron ore from the Bahariya Depression were investigated in this study. The mineralogical and organic compositions of the stones were revealed by means of Raman spectroscopy. The presence of various organic materials in the ironstones demonstrate that the formation of this rocks was biological mediated.

    8. Raman analysis assessed by Fourier-Transformed infrared and X-ray fluorescence spectroscopies: a multi-analytical approach of ancient chromolithographs from the 19th century (pages 411–418)

      A. Pitarch, A. Álvarez-Pérez, K. Castro, J. M. Madariaga and I. Queralt

      Version of Record online: 27 OCT 2011 | DOI: 10.1002/jrs.3055

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      A set of chromolithographs from the 19th century was analysed by Raman spectroscopy assisted with energy dispersive X-ray fluorescence and Fourier-transform infrared spectroscopies. The study showed that although the range of substances used for its elaboration was relatively limited, the use of some complexes and unusual admixtures of primary pigments were identified.

    9. Polarization resolved stimulated raman scattering: probing depolarization ratios of liquids (pages 419–424)

      F. Munhoz, S. Brustlein, R. Hostein, P. Berto, S. Brasselet and H. Rigneault

      Version of Record online: 20 OCT 2011 | DOI: 10.1002/jrs.3043

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      A simple analytic model of linear polarization stimulated Raman scattering spectroscopy in isotropic media is developed. In this scheme, the pump and Stokes beams can have arbitrary and independent linear polarization states, and the stimulated Raman scattering signal is analyzed along two perpendicular directions. This model enables us to measure Raman depolarization ratio of solutions in a simple way.

    10. Origin of the variability of the mechanical properties of silk fibres: 1 - The relationship between disorder, hydration and stress/strain behaviour (pages 425–432)

      Philippe Colomban, Hung Manh Dinh, Anthony Bunsell and Bernard Mauchamp

      Version of Record online: 20 SEP 2011 | DOI: 10.1002/jrs.3044

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      The causes of the variability in the mechanical behaviour of various silks obtained from silkworms (Bombyx mori, Antheraea/Tussah) and spiders (Nephila madagascarensis) have been studied by tensile uniaxial tests and Raman microspectrometry of the νN–H and O–H bands. Five stress/strain behaviours are evidenced and correlated to the water content and short-range disorder.

    11. Raman and XRD study on brookite–anatase coexistence in cathodic electrosynthesized titania (pages 433–438)

      C. S. Campos, E. R. Spada, F. R. de Paula, F. T. Reis, R. M. Faria and M. L. Sartorelli

      Version of Record online: 22 SEP 2011 | DOI: 10.1002/jrs.3048

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      Rutile-free mixtures of anatase and brookite are crystallized after thermal treatment of amorphous cathodic electrodeposits obtained from aqueous titanium oxysulfate electrolytes. The maximum brookite content is obtained at an annealing temperature (TA) of

      400 °C, although well crystallized products are already observed for TA as low as 200 °C. No traces of rutile are observed, even after TA = 800 °C. This very simple method for obtaining a brookite–anatase mixture, and the ability to tune the proportion by thermal annealing, makes this a promising alternative whose potential for solar cells and photocatalysis deserves a careful evaluation.

    12. Raman investigation of hydrostatic and nonhydrostatic compressions of OH- and F-apophyllites up to 8 GPa (pages 439–447)

      Sergei V. Goryainov, Alexander S. Krylov, Yuanming Pan, Iliya A. Madyukov, Mikhail B. Smirnov and Alexander N. Vtyurin

      Version of Record online: 27 OCT 2011 | DOI: 10.1002/jrs.3049

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      Layer silicates F- and OH-apophyllites, KCa4Si8O20(F, OH)·8H2O, have been investigated by Raman spectroscopy at hydrostatic and nonhydrostatic pressures up to ~8 GPa in a diamond anvil cell in a methanol–ethanol medium. At hydrostatic compression, apophyllites retain their crystalline states (i.e. no amorphization) up to 5 GPa so that the wavenumbers of most bands exhibit linear dependences on pressure. However, nonhydrostatic compression with additional uniaxial loading induces nonlinear dependences of these wavenumbers, widening bands and posterior amorphization of apophyllite.

    13. Investigation of stress and structural damage in H and He implanted Ge using micro-Raman mapping technique on bevelled samples (pages 448–454)

      J. Wasyluk, P. V. Rainey, T. S. Perova, S. J. N. Mitchell, D. W. McNeill, H. S. Gamble, B. M. Armstrong and R. Hurley

      Version of Record online: 27 OCT 2011 | DOI: 10.1002/jrs.3052

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      The results on structural damage in germanium wafers caused by hydrogen and helium implants of typical doses used in Smart Cut™ technology (4−8x1015 atoms/cm3) are investigated using Raman mapping and spreading resistance profiling techniques. Raman line-mapping measurements were performed up to the depth of ~400 nm into Ge substrate (well beyond the limit of visible light penetration depth) using a bevelling technique. From analysis of the Ge–Ge Raman peak it was found that implantation of H and He introduced a different type of stress, tensile and compressive, respectively, and significant structural damage with maximum at the projected range. The crystalline structure after implantation is completely recovered when annealed at 600 °C for both type of implants.

    14. Raman spectrum of U4O9: a new interpretation of damage lines in UO2 (pages 455–458)

      L. Desgranges, G. Baldinozzi, P. Simon, G. Guimbretière and A. Canizares

      Version of Record online: 20 OCT 2011 | DOI: 10.1002/jrs.3054

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      The Raman spectrum of a pure-phase U4O9 is for the first time completely described and interpreted. The U4O9 Raman spectrum derives from the well characterised one of UO2. Besides reminiscent modes of UO2, a band at 630 cm-1, which has a specific response to polarised light, was interpreted as characteristic of clusters of interstitial oxygen atoms.

  2. Short Communications

    1. Top of page
    2. Research Articles
    3. Short Communications
    1. A three-dimensional surface-enhanced Raman scattering substrate: Au nanoparticle supramolecular self-assembly in anodic aluminum oxide template (pages 459–463)

      Xinnan Wang, Shuping Xu, Haibo Li, Jinlong Tao, Bing Zhao and Weiqing Xu

      Version of Record online: 14 OCT 2011 | DOI: 10.1002/jrs.3041

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      We provided the design of a three-dimentional surface-enhanced Raman scattering-active substrate through the supramolecular self-assembly of Au nanoparticles into the nanopores of anodic aluminum oxide templates. With the method, large numbers of metal nanoparticles were successfully loaded into the anodic aluminum oxide channels in an aggregation form, which supported more ‘hot spots’ to bring stronger surface-enhanced Raman scattering effect.

    2. The nature of black stains in Lascaux Cave, France, as revealed by surface-enhanced Raman spectroscopy (pages 464–467)

      Pedro M. Martin-Sanchez, Santiago Sanchez-Cortes, Eduardo Lopez-Tobar, Valme Jurado, Fabiola Bastian, Claude Alabouvette and Cesareo Saiz-Jimenez

      Version of Record online: 14 OCT 2011 | DOI: 10.1002/jrs.3053

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      The chemical composition of the black stains threatening the rock-art paintings of Lascaux Cave, Montignac, France was studied using surface-enhanced Raman spectroscopy (SERS). The stains are mainly composed of the melanin from the fungus Ochroconis sp. and the faecal pellets of the collembolan Folsomia candida. SERS is a useful technique for revealing the structure of unknown macromolecules in cultural heritage research.