Raman scattering spectrum

Similar results were found by Bacsa el al. [26] for cathode core material. Raman scattering spectra were reported by these authors for material shown in these figures, and these results are discussed below. Their HRTEM images showed that heating core material in air induces a clear reduction in the relative abundance of the carbon nanoparticles. The Raman spectrum of these nanoparticles would be expected to resemble an intermediate between a strongly disordered carbon black synthesized at 850°C (Fig. 2d) and that of carbon black graphitized in an inert atmosphere at 2820°C (Fig. 2c). As discussed above in section 2, the small particle size, as well as structural disorder in the small particles (dia. —200 A), activates the D-band Raman scattering near 1350 cm . ... 

Burshtein A. I., Temkin S. I. Collapse of the rotational structure of Raman-scattering spectra in dense media, Sov. Phys. JETP. 44, 492-499 (1976). [ZhETP 71, 938-51 (1976)]. 

Sala J. P., Bonamy J., Robert D., Lavorel B., Millot G., Berger H. A rotational thermalization model for the calculation of collisionally narrowed isotropic Raman scattering spectra - application to the SRS N2 Q-branch, Chem. Phys. 106, 427-39 (1986). 

S. Lefrant, I. Baltog, M. Baibarac, J. Schreiber, and O. Chauver, Modification of surface-enhanced Raman scattering spectra of single-walled carbon nanotubes as a function of nanotube film thickness. Phys. Rev. B 65, 235401.1- 235401.9 (2002). 

Fig. 15 Raman scattering spectra of a STO 16 and b STO 18-23 observed in x(yy)-x scattering geometry (tetragonal notation). Arrows in a indicate positions of DIRS signal and its higher harmonic component [27]...

Fig. 18 Raman scattering spectra of a ST018-23 and b ST018-32 observed in x(yz)-x scattering geometry in a low-temperature region [27]...

Fig. 9 Fluidized bed UV Raman scattering spectra of adsorbates on HZSM5 zeolite catalyst. ...

The 10 11 M solution used for emission had an average of just 10 analyte molecules in the volume probed by the 514-nm excitation laser. [From Pj. G. Goulet, N.P.W. Pleczonka, and R. F. Aroca, "Overtones and Combinations in Single-Molecule Surface-Enhanced Resonance Raman Scattering Spectra," Anal. Chem. 2003, 75, 1918.]... 

To use Raman scattering as a method of isolating the orientation of the individual blocks of the sample, Raman scattering spectra were examine to ensure that each block yielded separate, identifiable peaks. For the PS-PBD system, these are provided by the C-C aromatic-aliphatic stretching vibration of the PS at a frequency of 1029 cm-1, and at... 

The first measurements of ROA followed by approximately five years the application of commercially available lasers to the measurement of Raman scattering spectra. More than any other technical advance, the laser light source elevated Raman scattering from the status of a curious alternative to infrared absorption to that of a powerful research tool. As will be discussed below, the processing of electronic data in ROA is much simpler than it is for VCD. In Raman scattering and ROA, spectral detection involves the conversion of scattered photons to individual electronic pulses that can be counted and stored. The main complication associated with the detection of ROA is the need to keep track of two separate bins of photon counts, one associated with RCP Raman intensity and the other with the corresponding LCP intensity. When the measurement is complete, the counts in the two bins are added to obtain the parent Raman spectrum and subtracted to obtain the ROA. 

Raman scattering spectra have been determined for tetrathiafulvalene (26), tetraselenaful-valene (28) and tetramethyltetraselenafulvalene (9) (82MI43501). The frequencies and assignment for these compounds are compiled in Table 6. The Raman spectra of various radical cation salts were determined as well. Both the IR and Raman spectra of these compounds were simple, reflecting the high degree of symmetry in these molecules. 

Figure 1 Origin of infrared (IR) absorption and Raman scattering spectra...

FIGURE 8. Solid state IR absorption and Raman scattering spectra of ellagic acid dihydrate... 

Structural changes in the course of dextrinization find only a minor response in the infiared-spectral characteristics of dextrins (see Fig. 21). Excellent articles have been published on the infrared absorption (including the far-i.r. region) " and Raman-scattering spectra of mono-, oligo-, and poly-saccharides. E>etailed band-assignments for these spectra commend attention on these spectroscopic techniques as useful tools in recognizing... 

It is now definitely concluded from analyses of Raman scattering spectra (Shirakawa et al., 1973) and X-ray scattering data (Fincher et al., 1982) that the trans- CH)x has the bond alternant structure (a). The existence of the bond alternation in the trans-(CH)X has also been predicted in terms of the Peierls transition from early work in the field of solid state physics (Peierls, 1955). 

The analysis of (CH), in terms of IR and Raman scattering spectroscopy is of fundamental importance in the study of the structure of this polymer, as for usual organic compounds. The trans-(CH)x is isomor-phous to the point group C2h, the cis isomer, to D2h. The assignment of IR and Raman scattering spectra has been reported together with that for the deuterized polymer (Shirakawa and Ikeda, 1971 Shirakawa et al., 1973 Kuzmany, 1980). 

Spectroscopic measurements have shown that these centres, when electrically active, could be generally characterized by their electronic absorption, luminescence, and Raman scattering spectra, while vibrational absorption and Raman scattering are independent from the electrical activity. 

Fig. 6.16 Raman scattering spectra for 15Nx14Ni xH4Br crystals 212...

Figure 4 Experimental Raman scattering spectra of water for the Bose-Einstein representation at high (a), room (b), and low (c) temperatures. Parts (a) and (c) are reconstructed from Amo and Tominaga [26] part (b) is reconstructed from Nielsen et al. [27].

Raman scattering spectra from a-C,(Cu,Zr) films and the results of their mathematical treatment are given in Fig. 1. and in Table 1. 

Raman scattering spectra from a-C H,Cu films with 60 and 75 at.% of carbon are shown in Fig. 1. The decrease of I /Ig ratio in comparison with a-C and a-C,Cu films was observed (Table 1). The position of G peak (for 75 at.% C) corresponds to crystalline graphite. Thus, carbon clusters of a graphite predominate in the film... 

The SERS spectrum of native calf thymus-DNA is shown in Fig. 12. The normal Raman scattering spectra of DNA in solution require a hundred times more concentrated solution than the SERS spectrum presented in Fig. 12. For the interpretation of the SERS spectrum of DNA it is necessary first to assign precise frequencies of the SERS bands of the nucleic bases A, G, C, and T. 

In this work, we study the modification of the Raman scattering spectra of SWCNT during electron irradiation with the energy of 1.8 MeV and doses of... 

Fig. 2 shows the decomposition of the Raman scattering spectra in the frequency region corresponding to the tangential vibrational modes of the irradiated SWCNT with the different fluences. It should be noted that the analysis of the... 

Infrared and Raman Spectroscopy. Resonance Raman spectra of aW-trans- and 15-CW-/3-carotene have been compared.The ps resonance Raman spectrum of /8-carotene has been described,and solvent effects on the excitation profile of the line of jS-carotene have been studied. Model calculations have been used to interpret observed jS-carotene Raman spectra and excitation profiles. Raman scattering spectra of j8-carotene-l2 complexes have been determined. Resonance Raman spectra of carotenoids have been used as an intrinsic probe for membrane potential, e.g. neurosporene [7,8-dihydro-(/r,(/r-carotene (183)] in chromatophores of Rhodopseudomonas sphaeroides. ° Resonance Raman spectroscopy and i.r. spectroscopy have been used in studies of the chromophore of visual pigments and visual cycle intermediates and of bacteriorhodopsin and its photocycle intermediates. ... 

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