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Journal articles on the topic 'Ultrafast Raman Loss Spectroscopic Studies'

Author: Grafiati

Published: 6 September 2023

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1

Kayal, Surajit, Khokan Roy, and Siva Umapathy. "Femtosecond coherent nuclear dynamics of excited tetraphenylethylene: Ultrafast transient absorption and ultrafast Raman loss spectroscopic studies." Journal of Chemical Physics 148, no. 2 (2018): 024301. http://dx.doi.org/10.1063/1.5008726.

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2

Kayal, Surajit, Khokan Roy, Y. Adithya Lakshmanna, and Siva Umapathy. "Probing the effect of solvation on photoexcited 2-(2′-hydroxyphenyl)benzothiazole via ultrafast Raman loss spectroscopic studies." Journal of Chemical Physics 149, no. 4 (2018): 044310. http://dx.doi.org/10.1063/1.5028274.

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3

Katturi, Naga Krishnakanth, Sarang Dev G, Nagarjuna Kommu, Gopala Krishna Podagatlapalli, and Venugopal Rao Soma. "Ultrafast Coherent Anti-Stokes Raman spectroscopic studies of nitro/nitrogen rich aryl-tetrazole derivatives." Chemical Physics Letters 756 (October 2020): 137843. http://dx.doi.org/10.1016/j.cplett.2020.137843.

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4

Kipkemboi, Pius K., and Allan J. Easteal. "Vibrational spectroscopic studies of aqueous solutions of tert-butyl alcohol and tert-butylamine." Canadian Journal of Chemistry 80, no. 7 (2002): 789–95. http://dx.doi.org/10.1139/v02-102.

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Raman and FT-IR absorption spectra of aqueous tert-butyl alcohol (t-BuOH) and tert-butylamine (t-BuNH2) in the region of the OH and NH2 stretching and bending modes have been measured as a function of organic co-solvent concentration in the whole co-solvent mole fraction region. The major observed changes of the aqueous binary solution spectra compared with the solvent spectra are a loss or gain of band intensity. In particular, the observed changes in intensities and linewidths of some bands were significantly more pronounced at low concentrations of organic co-solvents in water, where t-BuO

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5

Sokaras, Dimosthenis, Tsu-Chien Weng, Dennis Nordlund, and Uwe Bergmann. "High Energy Resolution X-ray Spectroscopy at SSRL and LCLS: Instruments and Applications." Acta Crystallographica Section A Foundations and Advances 70, a1 (2014): C223. http://dx.doi.org/10.1107/s2053273314097769.

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High-resolution hard x-ray spectroscopies (XES, HERFD, RIXS, XRS) are now well-established characterization tools for providing insights of material's electronic and geometric structure. The high brilliance synchrotron radiation beamlines have made feasible the routine study of the electronic structure and ligand environment of metal coordination compounds and active centers in metalloproteins, electrochemical process under in-situ conditions, as well as studies on catalytic systems under ambient conditions. Moreover, the recent availability of Linac Coherent Light Source (LCLS), provides some

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6

Isabelle, M., N. Stone, H. Barr, M. Vipond, N. Shepherd, and K. Rogers. "Lymph node pathology using optical spectroscopy in cancer diagnostics." Spectroscopy 22, no. 2-3 (2008): 97–104. http://dx.doi.org/10.1155/2008/871940.

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Raman and infrared spectroscopy are optical spectroscopic techniques that use light scattering (Raman) and light absorption (infrared) to probe the vibrational energy levels of molecules in tissue samples. Using these techniques, one can gain an insight into the biochemical composition of cells and tissues by looking at the spectra produced and comparing them with spectra obtained from standards such as proteins, nucleic acids, lipids and carbohydrates. As a result of optical spectroscopy being able to measure these biochemical changes, diagnosis of cancer could take place faster than current

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7

Towrie, Michael, David C. Grills, Joanne Dyer, et al. "Development of a Broadband Picosecond Infrared Spectrometer and its Incorporation into an Existing Ultrafast Time-Resolved Resonance Raman, UV/Visible, and Fluorescence Spectroscopic Apparatus." Applied Spectroscopy 57, no. 4 (2003): 367–80. http://dx.doi.org/10.1366/00037020360625899.

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We have constructed a broadband ultrafast time-resolved infrared (TRIR) spectrometer and incorporated it into our existing time-resolved spectroscopy apparatus, thus creating a single instrument capable of performing the complementary techniques of femto-/picosecond time-resolved resonance Raman (TR3), fluorescence, and UV/visible/infrared transient absorption spectroscopy. The TRIR spectrometer employs broadband (150 fs, ∼150 cm−1 FWHM) mid-infrared probe and reference pulses (generated by difference frequency mixing of near-infrared pulses in type I AgGaS2), which are dispersed over two 64-e

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8

Ho, Junming, Elizabeth Kish, Dalvin D. Méndez-Hernández, et al. "Triplet–triplet energy transfer in artificial and natural photosynthetic antennas." Proceedings of the National Academy of Sciences 114, no. 28 (2017): E5513—E5521. http://dx.doi.org/10.1073/pnas.1614857114.

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In photosynthetic organisms, protection against photooxidative stress due to singlet oxygen is provided by carotenoid molecules, which quench chlorophyll triplet species before they can sensitize singlet oxygen formation. In anoxygenic photosynthetic organisms, in which exposure to oxygen is low, chlorophyll-to-carotenoid triplet–triplet energy transfer (T-TET) is slow, in the tens of nanoseconds range, whereas it is ultrafast in the oxygen-rich chloroplasts of oxygen-evolving photosynthetic organisms. To better understand the structural features and resulting electronic coupling that leads to

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9

Shetty, Karthika, Jayadev, Kalyan Raj, and H. C. Ananda Murthy. "Evaluation of Electrochemical and Anticorrosion Properties of Polyaniline-Fly Ash Nanocomposite." International Journal of Corrosion 2021 (December 20, 2021): 1–10. http://dx.doi.org/10.1155/2021/1547384.

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In India, the thermal station generates approximately 6.9 × 10 7 tons of fly ash (FA) as a waste by-product. As part of this work, little attempt was made to produce useful materials from waste material. In our current research, polyaniline- (PANI-) fly ash (FA) nanocomposite (PFNC) was synthesized using an in situ polymerization method. The synthesized composites were characterized by employing advanced analytical, microscopic, and spectroscopic tools. The results of the X-ray diffraction (XRD) analysis confirm the effective reinforcement of FA into PANI in PFNC. The presence of functional gr

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10

Al-Hajji, Latifa A., Muhammad A. Hasan, and Mohamed I. Zaki. "Kinetic and characterization studies of the formation of barium monomolybdate in equimolar powder mixture of BaCO3 and MoO3." Journal of Materials Research 18, no. 10 (2003): 2339–49. http://dx.doi.org/10.1557/jmr.2003.0328.

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The formation of barium monomolybdate (BaMoO4) in inequimolar powder mixtures of BaCO3 and MoO3 was examined under isothermal and nonisothermal conditions upon heating in air at 25–1200 °C, using thermogravimetry. Concurrence of the observed mass loss (due to the release of CO2) to the occurrence of the formation reaction was evident. Accordingly, the extent of reaction (x) was determined as a function of time (t) or temperature (T). The x-t and x-T data thus obtained were processed using a well-established mathematical apparatus and methods to characterize the nature of the reaction rate-dete

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11

Petitgirard, Sylvain, Georg Spiekermann, Christopher Weis, Christoph Sahle, Christian Sternemann, and Max Wilke. "Miniature diamond anvils for X-ray Raman scattering spectroscopy experiments at high pressure." Journal of Synchrotron Radiation 24, no. 1 (2017): 276–82. http://dx.doi.org/10.1107/s1600577516017112.

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X-ray Raman scattering (XRS) spectroscopy is an inelastic scattering method that uses hard X-rays of the order of 10 keV to measure energy-loss spectra at absorption edges of light elements (Si, Mg, Oetc.), with an energy resolution below 1 eV. The high-energy X-rays employed with this technique can penetrate thick or dense sample containers such as the diamond anvils employed in high-pressure cells. Here, we describe the use of custom-made conical miniature diamond anvils of less than 500 µm thickness which allow pressure generation of up to 70 GPa. This set-up overcomes the limitations of th

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12

Gregori, Giuliano, Hans-Joachim Kleebe, Yigal D. Blum, and Florence Babonneau. "Evolution of C-rich SiOC ceramics." International Journal of Materials Research 97, no. 6 (2006): 710–20. http://dx.doi.org/10.1515/ijmr-2006-0116.

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Abstract In this Part II of the paper on the evolution of carbon-rich Si–O–C polymer-derived ceramics (PDCs), emphasis is placed on the strengths and limitations of transmission electron microscopy (TEM) techniques with high lateral resolution, i. e., electron energy-loss spectroscopy (EELS), high-resolution TEM (HRTEM) and energy-filtered TEM (EFTEM). Here, the identical SiOC materials, as described in Part I. EELS studies confirmed the progression of structural rearrangements within the SiOC matrix temperatures exceeding 1200 °C. High-resolution TEM imaging showed that the SiOC matrices are

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13

Joseph, Sherin, A. V. Ramesh Kumar, and Reji John. "Non-aqueous electrochemical deposition of lead zirconate titanate films for flexible sensor applications." Modern Physics Letters B 31, no. 31 (2017): 1750287. http://dx.doi.org/10.1142/s0217984917502876.

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Lead zirconate titanate (PZT) is one of the most important piezoelectric materials widely used for underwater sensors. However, PZTs are hard and non-compliant and hence there is an overwhelming attention devoted toward making it flexible by preparing films on flexible substrates by different routes. In this work, the electrochemical deposition of composition controlled PZT films over flexible stainless steel (SS) foil substrates using non-aqueous electrolyte dimethyl sulphoxide (DMSO) was carried out. Effects of various key parameters involved in electrochemical deposition process such as cur

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14

Thompson, Matthew K., Madeline R. Shay, Vesna de Serrano, Rania Dumarieh, Reza A. Ghiladi, and Stefan Franzen. "A new inhibition mechanism in the multifunctional catalytic hemoglobin dehaloperoxidase as revealed by the DHP A(V59W) mutant: A spectroscopic and crystallographic study." Journal of Porphyrins and Phthalocyanines 25, no. 07n08 (2021): 756–71. http://dx.doi.org/10.1142/s1088424621500826.

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As multifunctional catalytic hemoglobins, dehaloperoxidase isoenzymes A and B (DHP A and B) are among the most versatile hemoproteins in terms of activities displayed. The ability of DHP to bind over twenty different substrates in the distal pocket might appear to resemble the promiscuousness of monooxygenase enzymes, yet there are identifiable substrate-specific interactions that can steer the type of oxidation (O-atom vs. electron transfer) that occurs inside the DHP distal pocket. Here, we have investigated the DHP A(V59W) mutant in order to probe the limits of conformational flexibility in

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15

Kgoetlana, Charlie M., Soraya P. Malinga, and Langelihle N. Dlamini. "Photocatalytic Degradation of Chlorpyrifos with Mn-WO3/SnS2 Heterostructure." Catalysts 10, no. 6 (2020): 699. http://dx.doi.org/10.3390/catal10060699.

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Tungsten trioxide (WO3) is a photocatalyst that has gained interest amongst researchers because of its non-toxicity, narrow band gap and superior charge transport. Due to its fast charge recombination, modification is vital to counteract this limitation. In this paper, we report on the fabrication of Mn-doped WO3/SnS2 nanoparticles, which were synthesised with the aim of minimising the recombination rates of the photogenerated species. The nanomaterials were characterised using spectroscopic techniques (UV-Vis-diffuse reflectance spectroscopy (DRS), Raman, XRD, photoluminescence (PL) and elect

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16

Barak, Arvind, Nishant Dhiman, Floriane Sturm, et al. "Excited‐State Intramolecular Charge‐Transfer Dynamics in 4‐Dimethylamino‐4’‐Cyanodiphenylacetylene: An Ultrafast Raman Loss Spectroscopic Perspective." ChemPhotoChem, September 2, 2022. http://dx.doi.org/10.1002/cptc.202200146.

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17

Ianno, Natale J., Rodney J. Soukup, Tobin Santero, et al. "Copper-Indium-Boron-Diselenide Absorber Materials." MRS Proceedings 1012 (2007). http://dx.doi.org/10.1557/proc-1012-y03-21.

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AbstractAttempts to fabricate new CuIn1-xBxSe2 (CIBS) and CuBSe2 (CBS) thin-film materials have been complicated by the formation of interfering crystallites and by the loss of boron from the magnetron sputtered precursor alloys during the selenization and annealing processes. Raman and Auger spectroscopic analysis as well as x-ray diffraction studies show that the formation of boron selenide may be contributing to the difficulty in creating these new materials.

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18

Sato, Yusui, Satoru Nagatoishi, Shintaro Noguchi, and Kouhei Tsumoto. "Raman Spectroscopic Analysis of Highly-Concentrated Antibodies under the Acid-Treated Conditions." Pharmaceutical Research, May 9, 2023. http://dx.doi.org/10.1007/s11095-023-03526-9.

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Abstract Purpose Antibody drugs are usually formulated as highly-concentrated solutions, which would easily generate aggregates, resulting in loss of efficacy. Although low pH increases the colloidal dispersion of antibodies, acid denaturation can be an issue. Therefore, knowing the physical properties at low pH under high concentration conditions is important. Methods Raman spectroscopy was used to investigate pH-induced conformational changes of antibodies at 50 mg/ml. Experiments in pH 3 to 7 were performed for human serum IgG and recombinant rituximab. Results We detected the evident chang

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19

Lavine, James P., David D. Tuschel, and Donald L. Black. "Phase Transformations Induced by Arsenic Implants into Silicon." MRS Proceedings 686 (2001). http://dx.doi.org/10.1557/proc-686-t8.9.

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AbstractMicro-Raman spectroscopic investigations of arsenic-implanted silicon show lines characteristic of silicon crystallites even at implant doses above the amorphization threshold. The intensity and frequency of occurrence of the lines increase with the implanted dose. Polarization/orientation Raman studies indicate the crystallites are silicon in the hexagonal phase (Si-IV) and silicon in the diamond phase (Si-I). The latter are oriented differently than the substrate silicon. Monte Carlo simulations of the arsenic ion energy loss and published molecular dynamics studies suggest that each

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20

Lavine, James P., David D. Tuschel, and Donald L. Black. "Phase Transformations Induced by Arsenic Implants into Silicon." MRS Proceedings 701 (2001). http://dx.doi.org/10.1557/proc-701-t8.9.1.

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ABSTRACTMicro-Raman spectroscopic investigations of arsenic-implanted silicon show lines characteristic of silicon crystallites even at implant doses above the amorphization threshold. The intensity and frequency of occurrence of the lines increase with the implanted dose. Polarization/orientation Raman studies indicate the crystallites are silicon in the hexagonal phase (Si-IV) and silicon in the diamond phase (Si-I). The latter are oriented differently than the substrate silicon. Monte Carlo simulations of the arsenic ion energy loss and published molecular dynamics studies suggest that each

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21

Jain, M., P. Bhattacharya, Yu I. Yuzyuk, R. S. Katiyar, and A. S. Bhalla. "Structural and Electrical Investigations of Ferroelectric Lead Strontium Titanate Thin Films and Ceramics." MRS Proceedings 784 (2003). http://dx.doi.org/10.1557/proc-784-c11.15.

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ABSTRACTLead strontium titanate (PbxSr1-xTiO3) (x=0.3–1.0) ceramic targets were prepared by the conventional powder-processing method. Thin films of these compositions were deposited on platinized silicon substrates by pulsed laser deposition technique. X-ray diffraction studies of the ceramic targets showed that the lattice structure changes from tetragonal to cubic phase with the increase of Sr content in PbTiO3. Raman spectroscopic studies of PbxSr1-xTiO3(PST) ceramics and thin films showed that the soft mode decreases to lower frequency and finally disappear at around 60–70 at% Sr content,

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22

Kunkel, Sebastian, and Rainer Niewa. "Na2La4(NH2)14·NH3, a lanthanum-rich intermediate in the ammonothermal synthesis of LaN and the effect of ammonia loss on the crystal structure." Zeitschrift für Naturforschung B, April 30, 2021. http://dx.doi.org/10.1515/znb-2021-0025.

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Abstract Single crystals of Na2La4(NH2)14·NH3 were obtained from supercritical ammonia under ammonobasic conditions at a temperature of 573 K and 120 MPa pressure. It represents a lanthanum-rich intermediate in the ammonothermal synthesis of LaN. Upon aging, the title compound loses the crystal ammonia, resulting in pale crystals of Na2La4(NH2)14, the original space group P212121 being retained in a very similar unit cell. However, the crystal structure reacts to subtle changes in the composition as well as to the modified coordination of particularly the sodium cations interconnecting lanthan

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23

"Electron energy loss spectroscopy of adsorbed ethylene." Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences 318, no. 1541 (1986): 141–61. http://dx.doi.org/10.1098/rsta.1986.0068.

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Electron energy loss spectroscopy (e.e.l.s.) provides an alternative method to infrared spectroscopy for studying the vibrational spectra of monolayers of chemisorbed molecules on single-crystal surfaces of metals. It has the advantages over infrared spectroscopy of considerably higher sensitivity, and the operation of two scattering mechanisms (dipolar and impact) that can be used to identify vibrations involving net motions parallel or perpendicular to the metal surface. It has the disadvantages with respect to infrared spectroscopy of lower attainable resolution and the necessity of the pre

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24

da Fonseca, Bruna Teixeira, Eliane D’Elia, José Márcio Siqueira Júnior, Sanair Massafra de Oliveira, Kelly Leite dos Santos Castro, and Emerson Schwingel Ribeiro. "Study of the characteristics and properties of the SiO2/TiO2/Nb2O5 material obtained by the sol–gel process." Scientific Reports 11, no. 1 (2021). http://dx.doi.org/10.1038/s41598-020-80310-4.

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AbstractThe SiO2/TiO2/Nb2O5 material was set by the sol–gel method and was characterized by several techniques through thermogravimetric, spectroscopic, and textural analyzes. For the two synthesized materials, the specific surface area was 350.0 and 494.0 m2 g−1 (SiTiNb-A and SiTiNb-B, respectively). An enhance of the crystalline order with the temperature increase of the thermal treatment was observed. Through X-ray Photoelectron Spectroscopy analysis, the binding energy values for the Ti 2p and Nb 3d levels showed the insertion of Ti and Nb atoms in the silica matrix. The Electron Dispersiv

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25

"Nanomaterials and nanotechnology for composites: synthesis, structure, properties and new application opportunities." Biointerface Research in Applied Chemistry 10, no. 3 (2020): 5634–35. http://dx.doi.org/10.33263/briac103.634635.

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The aim of this special issue is to bring cutting-edge research across the entire spectrum of Materials Science and Nanotechnology. This special issue involves combining and understanding of the physical principles demonstrated by composite materials, nanomaterials, biomaterials, technology of nanometre-scale objects and other materials technologies. Materials engineering gathers scientists and engineers from many different subjects, such as materials science, nanotechnology, microtechnology, ceramic, metal, polymer, composite technology, and structural materials. This special issue allows res

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