Raman scattering studies

Yang W H, Hulteen J 0, Schatz G G and Van Duyne R P 1996 A surface-enhanced hyper-Raman and surface-enhanced Raman scattering study of trans-1,2-bis(4-pyridyl)ethylene adsorbed onto silver film over nanosphere electrodes. Vibrational assignments experiments and theory J. Chem. Phys. 104 4313-26... 

Optical absorption measurements give band-gap data for cubic sihcon carbide as 2.2 eV and for the a-form as 2.86 eV at 300 K (55). In the region of low absorption coefficients, optical transitions are indirect whereas direct transitions predominate for quantum energies above 6 eV. The electron affinity is about 4 eV. The electronic bonding in sihcon carbide is considered to be predominantiy covalent in nature, but with some ionic character (55). In a Raman scattering study of vahey-orbit transitions in 6H-sihcon carbide, three electron transitions were observed, one for each of the inequivalent nitrogen donor sites in the sihcon carbide lattice (56). The donor ionization energy for the three sites had values of 0.105, 0.140, and 0.143 eV (57). 

Abstract—Experimental and theoretical studies of the vibrational modes of carbon nanotubes are reviewed. The closing of a 2D graphene sheet into a tubule is found to lead to several new infrared (IR)- and Raman-active modes. The number of these modes is found to depend on the tubule symmetry and not on the diameter. Their diameter-dependent frequencies are calculated using a zone-folding model. Results of Raman scattering studies on arc-derived carbons containing nested or single-wall nanotubes are discussed. They are compared to theory and to that observed for other sp carbons also present in the sample. 

Nikoobakht, B. and El-Sayed, M.A. (2003) Surface-enhanced Raman scattering studies on aggregated gold nanorods. Journal of Physical Chemistry A, 107,... 

Golab J.T., Sprague J.R., Carron K.T., Schatz G.C., Vanduyne R.P., A surface enhanced hyper-Raman scattering study of pyridine adsorbed onto silver - experiment and theory, J. Chem. Phys. 1988 88 7942-7951. 

Joo, S.-W. and Kim, Y.-S. (2004) Surface-enhanced Raman scattering study of benzyl mercaptide and benzyl isocyanide on gold and silver nanocolloid surfaces. Colloids Surf. A, 234, 117-22. 

Kim, N.H. and Kim, K. (2006) Adsorption characteristics of arylisocyanide on Au and Pt electrode surfaces surface-enhanced Raman scattering study. ]. Phys. Chem. E, 110, 1837-42. 

Kumazaki, T. Kito, Y. Sasaki, S. Kume, T. Shimizu, H. (2004). Single-crystal growth of the high-pressure phase II of methane hydrate and its Raman scattering study. Chem. Phys. Letter, 388 (1-3), 18-22... 

R. M. Kowalczyk, T. F. Kemp, D. Walker, K. J. Pike, P. A. Thomas, J. Kreisel, R. Dupree, M. E. Newton, J. V. Flanna and M. E. Smith, A variable temperature solid-state nuclear magnetic resonance, electron paramagnetic resonance and Raman scattering study of molecular dynamics in ferroelectric fluorides. /. Phys. Condens. Matter, 2011, 23, 315402. 

Abstract Comparative Raman scattering studies of single crystals GdBaCo205+5 with 8... 

S.L. Cooper, Electronic and magnetic Raman scattering studies of the high-Tc cuprates 509... 

Rossetti, R. Brus, L. E. Time-resolved Raman scattering study of adsorbed, semi-oxidized eosin Y formed by excited-state electron transfer into colloidal Ti02 particles, J. Am. Chem. Soc. 1984, 106, 4336. 

Raman scattering was often applied for studying the phonon modes of ZnO bulk samples [31-38], It has become a fast and reliable tool to study ZnO thin films [29,38-43], and ZnO nano- and/or microstructures [44-46]. Raman scattering studies were also reported for ZnO samples doped with Li [43, 47, 48], N [43, 49-51], A1 [48, 52-54], P [43, 55], Mn [43, 56-58], Fe [43, 48], Co [43], Ni [43], Cu [43], Ga [48, 51], As [59], Ce [60], or Sb [48, 61], and (Mg,Cd)xZni a 0 [43, 62] samples. IR reflection [63-65] and transmission measurements [66-68] were reported mainly for ZnO bulk materials. IR optical studies of doped ZnO and ZnO-based thin films are, in general, restricted to transmission and reflection measurements in the near-IR (NIR) spectral region, and to highly conductive Al-doped ZnO thin films. Some experiments were performed in the mid-IR (MIR) spectral region [52,69,70], where the optical phonon modes can be studied. Recently, IRSE was applied to study undoped and doped ZnO films, and ZnO-based alloy films [30,38,43,62,71-74]. 

The earliest XPS work on modem electroactive polymers appears to be that of Hsu et al. [63] on the chemical states of the dopant in iodine-doped (CH)X films. In this work, combined XPS and Raman scattering studies revealed the presence of I3 and IJ species. The latter species resulted from the equilibrium process of the type I2 + IJ = I5. Similar findings were also made in at least two separate studies [64, 16]. The presence of polyiodide anion species was also observed... 

Whittenburg SL, Wang CH. Raman scattering study of CS2 in CCI4. J Chem Phys 1979 70 3141-3142. 

Paracrystalline disorder will cause electron localization, but there is no reason for the corresponding characteristic length to be equal to L. It will therefore be interesting to compare Lp in particular to the average conjugation lengths inferred from resonance Raman scattering studies (see Section III). 

Recently, Nickel and Fleischer reported a Raman scattering study of as-grown state-of-the-art ZnO. A number of Raman lines were detected, which were ascribed to LVMs of N-H and C-H complexes with n=l,2,3. °... 

Abdullah and Sherman (1980) have described a variable temperature one-window high pressure cell. Raman spectra of four different phases of NH4Br illustrate the applicability of this cell for 180 ° Raman scattering studies. 

Zou, X. Q. and Dong, S. J. (2006). Surface-enhanced Raman scattering studies on aggregated silver nanoplates in aqueous solution. J. Phys. Chem. B 110 21545-21550. 

Bae SJ, Lee C, Choi IS, Hwang CS, Gong M, Kim K, Joo SW (2002) Adsorption of 4-biphenylisocyanide on gold and silver nanoparticle surfaces surface-enhanced Raman scattering study. J Phys Chem B 106 7076-7080... 

Faugeras C, Nerriere A, Potemski M, Mahmood A, Dujardin E, Berger C, de Heer WA (2008) Eew-layer graphene on SiC, pyrolitic graphene a Raman scattering study. Appl Phys Lett 92 011914-1-011914-3... 

Holtz M, Duncan WM, Zollner S, Liu R (2000) Visible and ultraviolet Raman scattering studies of Sii Ge alloys. J Appl Phys 88 2523... 

Sato and S. Uchida, Raman-Scattering Study of the Metal-Insulator Transition in Bai K,Bi03, Phya. Rev. B46, 1232-1235 (1992). 

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