Journal of Raman Spectroscopy

Cover image for Vol. 43 Issue 4

April 2012

Volume 43, Issue 4

Pages 469–591

  1. Research Articles

    1. Top of page
    2. Research Articles
    3. Short Communication
    1. Au nanoplate/polypyrrole nanofiber composite film: preparation, characterization and application as SERS substrate (pages 469–473)

      Youyi Xia and Hongping Xiao

      Version of Record online: 3 NOV 2011 | DOI: 10.1002/jrs.3076

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      On the basis of a conducting polypyrrole nanofiber film, we demonstrate a convenient route for the simultaneous synthesis and immobilization of Au nanoplates that exhibit highly enhanced Raman activity.

    2. Portable smart films for ultrasensitive detection and chemical analysis using SERS and SERRS (pages 474–477)

      F. C. Cabrera, P. H. B. Aoki, R. F. Aroca, C. J. L. Constantino, D. S. dos Santos and A. E. Job

      Version of Record online: 12 MAR 2012 | DOI: 10.1002/jrs.3074

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      Reproducible, portable, and flexible surface-enhanced Raman scattering-active substrates for analytical method was developed incorporating gold nanoparticles onto the surface of natural rubber membranes. The gold nanoparticles show characteristic localized surface plasmon resonances with maximum at 560 nm.

    3. Surface-enhanced Raman scattering of hydroxyproline (pages 478–481)

      Ariel R. Guerrero and Ricardo F. Aroca

      Version of Record online: 27 OCT 2011 | DOI: 10.1002/jrs.3065

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      An experimental procedure is presented to demonstrate the acquisition of reproducible surface-enhanced Raman scattering spectra of hydroxyproline and its deuterated-d3 analogue.

    4. Depth profiling of porcine adipose tissue by Raman spectroscopy (pages 482–489)

      Lotte Bøge Lyndgaard, Klavs Martin Sørensen, Frans van den Berg and Søren Balling Engelsen

      Version of Record online: 7 NOV 2011 | DOI: 10.1002/jrs.3067

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      Raman spectroscopy was applied on a depth profile of porcine adipose tissue (from skin to meat) with the purpose of (1) discriminating between fat layers and (2) estimating the total degree of unsaturation (iodine value) as a function of fat depth and fat layer. From principal component analysis on standard normal variate preprocessed Raman spectra (1800–800 cm–1), it was possible to discriminate between the outer and the inner backfat layer.

    5. Diagnosis of head and neck squamous cell carcinoma using Raman spectroscopy: tongue tissues (pages 490–496)

      Suneetha Devpura, Jagdish S. Thakur, Seema Sethi, Vaman M. Naik and Ratna Naik

      Version of Record online: 27 OCT 2011 | DOI: 10.1002/jrs.3070

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      Raman spectroscopic investigation was done for normal, carcinoma in situ, and invasive squamous cell carcinoma (SCC) of tongue tissues. In the SCC, an enhancement (reduction) in Raman bands associated with tryptophan (keratin) compared to the normal tissue was observed. This study shows the diagnostic potential of Raman spectroscopy for detection and progression of SCC in the tongue.

    6. Surface-enhanced Raman scattering spectroscopy for potential noninvasive nasopharyngeal cancer detection (pages 497–502)

      Juqiang Lin, Rong Chen, Shangyuan Feng, Jianji Pan, Buhong Li, Guannan Chen, Shaojun Lin, Chao Li, Li-qing Sun, Zufang Huang and Haishan Zeng

      Version of Record online: 27 OCT 2011 | DOI: 10.1002/jrs.3072

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      Combining membrane electrophoresis with surface-enhanced Raman scattering (SERS) spectroscopy, serum proteins were first purified and then mixed with silver nanoparticles to perform SERS spectral analysis. Therefore, the spectral signatures were enhanced to high-fidelity SERS signatures because of the purification procedure of the first step. We used the method to analyze blood plasma samples from nasopharyngeal cancer patients (n=43) and healthy volunteers (n=33) for cancer detection. Principal components analysis of the SERS spectra revealed that the data points for the cancer groups and the normal group form distinct, completely separated clusters with no overlap. Therefore, the nasopharyngeal cancer group can be unambiguously discriminated from the normal group, i.e., with both diagnostic sensitivity and specificity of 100%. These results are very promising for developing a label-free, noninvasive, and reliable clinical tool for rapid cancer detection and screening.

      Corrected by:

      Erratum: Surface-enhanced Raman scattering spectroscopy for potential noninvasive nasopharyngeal cancer detection

      Vol. 44, Issue 3, 507, Version of Record online: 7 FEB 2013

    7. Hydrogen bonding in homochiral dimers of hydroxyesters studied by Raman optical activity spectroscopy (pages 503–513)

      Shi Qiu, Guanna Li, Peng Wang, Guoqing Jia, Zhaochi Feng and Can Li

      Version of Record online: 7 NOV 2011 | DOI: 10.1002/jrs.3056

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      A Raman optical activity (ROA) spectroscopic study on methyl lactate and related molecules provides detailed structural information of hydrogen bonding in homochiral dimers and reveals different behaviors of optical activity tensor invariants for the intra- and inter- molecular hydrogen bonding motions

    8. Origin of salt mixtures and mixed salts in atmospheric particulate matter (pages 514–519)

      Paul Vargas Jentzsch, Valerian Ciobotă, Bernd Kampe, Petra Rösch and Jürgen Popp

      Version of Record online: 7 NOV 2011 | DOI: 10.1002/jrs.3064

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      Considering that water plays a fundamental role in the generation of atmospheric inorganic particles, Raman spectroscopic studies of two specific systems were performed. It was observed that KNO3 crystallizes from aqueous solution at 20°C in phase III. The polarized Raman spectra of synthetic darapskite were recorded and bands assigned.

    9. Raman spectrum of monobromoindigo (pages 520–525)

      Hiroko Ajiki, Federica Pozzi, Lulu Huang, Lou Massa, Marco Leona and John R. Lombardi

      Version of Record online: 3 NOV 2011 | DOI: 10.1002/jrs.3066

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      A complete Raman spectral characterization of monobromoindigo, a component of a historically important colorant named Tyrian purple, was carried out at 488 and 785 nm and the results were compared to the analogous data collected from indigo under the same conditions. A detailed assignment of the Raman lines was obtained using density functional theory calculations, which revealed the similarity and differences between experimental monobromoindigo and indigo spectra.

    10. Elastic properties study of single crystal NH3 up to 26 GPa (pages 526–531)

      Fangfei Li, Defang Duan, Min Li, Chunli Ma, Qiliang Cui, Tian Cui, Qiang Zhou, Xiaodong Li, Yanchun Li, Jing Liu and Guangtian Zou

      Version of Record online: 27 OCT 2011 | DOI: 10.1002/jrs.3068

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      Single crystal Brillouin and Raman scattering measurements on NH3 in a diamond anvil cell have been performed under pressures up to 26 GPa at room temperature. The pressure dependencies of acoustic velocity, adiabatic elastic constants, and bulk moduli of ammonia from liquid to solid III and solid IV phase have been determined. In Raman spectra the very weak bending modes ν2 and ν4 for orthorhombic ammonia are both observed at room temperature. Both Brillouin and Raman spectra reflect a possible isostructural phase transition near 12 GPa, which is consistent with early X-ray diffraction studies.

    11. Raman classification of glass beads excavated on Mapungubwe hill and K2, two archaeological sites in South Africa (pages 532–542)

      Aurélie Tournié, Linda C Prinsloo and Philippe Colomban

      Version of Record online: 27 OCT 2011 | DOI: 10.1002/jrs.3069

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      A database was compiled on the Raman spectra of about 175 glass trade beads and classified according to the type of glass matrix and pigments used as colouring agents. The results raise questions about the last occupation date of the Mapungubwe hill in South Africa.

    12. Raman spectroscopic characterization of the magnesium content in amorphous calcium carbonates (pages 543–548)

      Dongbo Wang, Laura M. Hamm, Robert J. Bodnar and Patricia M. Dove

      Version of Record online: 27 OCT 2011 | DOI: 10.1002/jrs.3057

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      A series of Mg-bearing synthetic amorphous calcium carbonates were characterized by Raman spectroscopy. The spectra show a systematic increase in carbonate ν1 peak position from the control samples that contain 0.0 mol % MgCO3 to samples that contain up to 43 mol % MgCO3. The Mg content is equally well-predicted by a correlation with the ν1 full width at half maximum.

    13. Tuning of phonon anharmonicity in pyrochlore titanates: temperature-dependent Raman studies of Sm2Ti2-xZrxO7 (x=0, 1/2, 3/4, and 2) and stuffed spin-ice Ho2 + xTi2 − xO7 − x/2 (x=0, 1/3, and 2/3) (pages 549–555)

      Surajit Saha, Sudakshina Prusty, Surjeet Singh, R. Suryanarayanan, A. Revcolevschi and A. K. Sood

      Version of Record online: 3 NOV 2011 | DOI: 10.1002/jrs.3058

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      Temperature-dependent phonon anomalies in pyrochlore titanates (A2Ti2O7) decrease as Ti4+ is replaced by bigger ions, thus indicating a decrease in phonon–phonon anharmonic interactions.

    14. Micro-Raman investigations on inclusions of unusual habit in a commercial tanzanite gemstone (pages 556–558)

      Marco Giarola, Gino Mariotto and David Ajò

      Version of Record online: 15 OCT 2011 | DOI: 10.1002/jrs.3059

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      The vibrational properties and the crystal structure of submillimetre inclusions of unusual habit incorporated at different depths in a tanzanite gemstone have been investigated by means of confocal micro-Raman spectroscopy. The observed spectral features were unambiguously identified as specific markers of hematite (α-Fe2O3). The assignment has been inferred by comparing our experimental findings with the literature data recorded either in single crystals of hematite or in other iron oxides and oxyhydroxides.

    15. Raman spectroscopy of natural cordierite at high water pressure up to 5 GPa (pages 559–563)

      Anna Yu. Likhacheva, Sergey V. Goryainov, Aleksandr S. Krylov, Taras A. Bul'bak and Pinnelli S. R. Prasad

      Version of Record online: 27 OCT 2011 | DOI: 10.1002/jrs.3060

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      A first-order, reversible phase transition is first found to proceed in cordierite at about 4.5 GPa. It is preceded by disordering of the framework and intrachannel H2O subsystem at P > 4 GPa. The shifts amplitudes of different framework modes indicate the predominance of deformation over contraction of the framework polyhedra upon this transition. The disordering of H2O molecules in new phase is likely a consequence of distortion of channel-forming framework elements, which is supposed to be a driving force of this transition.

    16. Calibration of berlinite (AlPO4) as Raman spectroscopic pressure sensor for diamond-anvil cell experiments at elevated temperatures (pages 564–570)

      Anke Watenphul and Christian Schmidt

      Version of Record online: 27 OCT 2011 | DOI: 10.1002/jrs.3062

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      Shifts of the band position of the 462 and 1111 cm–1 Raman lines of berlinite with pressure and temperature were calibrated for use as pressure sensor for diamond-anvil cell experiments. Pressure can be determined from changes in the difference of both band positions, with the advantage that this method is independent of spectrometer drift and spectral resolution. The attainable precision is comparatively high because of the large pressure-induced and the fairly small temperature-induced changes in this difference.

    17. Raman spectroscopy of synthetic CaHPO4·2H2O– and in comparison with the cave mineral brushite (pages 571–576)

      Ray L. Frost, Yunfei Xi, Ross E. Pogson, Graeme J. Millar, Keqin Tan and Sara J Palmer

      Version of Record online: 27 OCT 2011 | DOI: 10.1002/jrs.3063

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      The mineral brushite has been synthesised by mixing calcium ions and hydrogen phosphate anions to mimic the reactions in a cave. The Raman spectra of the synthesised brushite were compared with that of the natural cave mineral.

    18. Raman scattering study of temperature and hydrostatic pressure phase transitions in Rb2KTiOF5 crystal (pages 577–582)

      A. S. Krylov, S. V. Goryainov, A. N. Vtyurin, S. N. Krylova, S. N. Sofronova, N. M. Laptash, T. B. Emelina, V. N. Voronov and S. V. Babushkin

      Version of Record online: 27 OCT 2011 | DOI: 10.1002/jrs.3071

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      Raman spectra of Rb2KTiOF5 crystal have been obtained and analyzed at temperature range from 77 to 297 K, and under hydrostatic pressure till 4.2 GPa (at T = 296 K). The experimental results are compared with the quantum-chemical simulation of TiOF5 pseudo-octahedron. Phonon spectra for several ordered phases of Rb2KTiOF5 were simulated within ab initio generalized Gordon – Kim model to interpret effects of lattice ordering. Under ambient conditions the spectra exhibit orientation disordering in the cubic phase. Cooling below the phase transition temperature (215 K) partially orders the structure. The isotropic perovskite-like phase was found to undergo first-order transition into low-symmetry anisotropic phase at about 1 GPa. The spectra of high-pressure and low temperature phases are different. Further compression up to 4.1 GPa did not disclose any effects associated with phase transitions.

    19. Doping effect on the phase transition temperature in ferroelectric SrBi2−xNdxNb2O9 layer-structured ceramics: a micro-Raman scattering study (pages 583–587)

      Kai Jiang, Wenwu Li, Xiangui Chen, Zhenni Zhan, Lin Sun, Zhigao Hu and Junhao Chu

      Version of Record online: 27 OCT 2011 | DOI: 10.1002/jrs.3075

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      The temperature dependence of Raman spectra for SrBi2−xNdxNb2O9 ceramics has been measured. Many anomalous changes were observed and discussed in detail. The TC decreases from ~710 to 550 K with the Nd composition because of the reduced distortion extent and tilting angle of NbO6 octahedron.

  2. Short Communication

    1. Top of page
    2. Research Articles
    3. Short Communication
    1. Microwave monitoring of silver nanoparticle sintering for surface-enhanced Raman scattering substrates (pages 588–591)

      Manuel Figueroa, Kambiz Pourrezaei and Somdev Tyagi

      Version of Record online: 27 OCT 2011 | DOI: 10.1002/jrs.3073

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      The signal amplification observed in surface-enhanced Raman scattering is highly influenced by the interparticle separation in metallic colloidal-based substrates. Microwave absorption is shown to be a sensitive probe to monitor silver nanoparticle sintering as a function of temperature. Because the microwave losses occur predominantly at the weak electrical links between nanoparticles, microwave absorption monitoring can serve as a guide in determining thermal annealing treatments to optimize surface-enhanced Raman scattering substrate performance.