scholarly journals Raman Spectral Changes of Sugi Bark during Thermal Degradation and Carbonization

2000 ◽  
Vol 49 (9Appendix) ◽  
pp. 227-228
Author(s):  
Shigeru YAMAUCHI ◽  
Yoshinari KIKUCHI ◽  
Yasuji KURIMOTO
Keyword(s):  
Thermal Degradation ◽  
Spectral Changes ◽  
Raman Spectral

Raman spectral changes of PEDOT–PSS in polymer light-emitting diodes upon operation

2005 ◽  
Vol 412 (4-6) ◽  
pp. 395-398 ◽  
Author(s):  
Satoshi Sakamoto ◽  
Masanori Okumura ◽  
Zinggang Zhao ◽  
Yukio Furukawa
Keyword(s):  
Light Emitting Diodes ◽  
Light Emitting ◽  
Spectral Changes ◽  
Polymer Light Emitting Diodes ◽  
Raman Spectral

Raman spectral changes of Artemisinin-induced Raji cells apoptosis

2015 ◽  
Vol 81 ◽  
pp. 83-89 ◽  
Author(s):  
Shufang Hu ◽  
Yanyan Feng ◽  
Daosen Zhang ◽  
Xiaoxu Lu ◽  
Jindong Tian ◽  
...  
Keyword(s):  
Raji Cells ◽  
Spectral Changes ◽  
Raman Spectral

Hydrate formation and its effects on the thermal expansion properties of HfMgW3O12

2020 ◽  
Vol 22 (22) ◽  
pp. 12605-12612 ◽  
Author(s):  
Gaojie Zeng ◽  
Huanli Yuan ◽  
Juan Guo ◽  
Qiang Sun ◽  
Qilong Gao ◽  
...  
Keyword(s):  
Thermal Expansion ◽  
Hydrate Formation ◽  
Spectral Changes ◽  
Expansion Curve ◽  
Thermal Expansion Curve ◽  
Raman Spectral

The thermal expansion curve of HfMgW3O12 correlated with hydration/dehydration accompanying structure and Raman spectral changes.

Raman spectral changes of neat CO2 across the ridge of density fluctuation in supercritical region

2000 ◽  
Vol 320 (3-4) ◽  
pp. 323-327 ◽  
Author(s):  
Hideyuki Nakayama ◽  
Ken-ichi Saitow ◽  
Maki Sakashita ◽  
Kikujiro Ishii ◽  
Keiko Nishikawa
Keyword(s):  
Density Fluctuation ◽  
Supercritical Region ◽  
Spectral Changes ◽  
Raman Spectral

Pressure- and temperature-induced Raman spectral changes of 1-butyl-3-methylimidazolium tetrafluoroborate

2011 ◽  
Vol 31 (1) ◽  
pp. 53-57 ◽  
Author(s):  
Yusuke Imai ◽  
Takahiro Takekiyo ◽  
Hiroshi Abe ◽  
Yukihiro Yoshimura
Keyword(s):  
Spectral Changes ◽  
Raman Spectral

Vibrational Spectroscopic Study of Iodine-Doped Poly(Isothianaphthene)

2002 ◽  
Vol 56 (7) ◽  
pp. 909-915 ◽  
Author(s):  
Wei-Te Chen ◽  
Graham A. Bowmaker ◽  
John M. Seakins ◽  
Ralph P. Cooney
Keyword(s):  
Raman Spectroscopy ◽  
Laser Excitation ◽  
Far Infrared ◽  
Mid Infrared ◽  
Spectral Changes ◽  
Infrared And Raman Spectroscopy ◽  
Doped Polymer ◽  
Raman Spectral ◽  
Ir And Raman ◽  
Absorption Mode

Far-infrared, mid-infrared, and Raman spectroscopy were used to characterize iodine-doped poly(isothianaphthene) (PITN) films and powders. The far-infrared and mid-infrared results show changes from absorption mode to reflective mode as the doping level increases, consistent with the iodine-doped PITN becoming more metallic and more conductive at higher doping levels. The far-IR and Raman (514.5-nm laser excitation) results show that I3− is dominant in iodine-doped PITN. The Raman spectral changes observed using 1064-nm excitation are different from those measured using 514.5-nm excitation. The spectra recorded with 514.5-nm excitation show features due to the undoped parts of the polymer, and these indicate that the effective conjugated chain length decreases with increased doping. The Raman spectra obtained by using 1064-nm excitation show features due to polaron and bipolaron states in the doped polymer.

Raman microprobe study of nanophase TiO2 and oxidation-induced spectral changes

1990 ◽  
Vol 5 (6) ◽  
pp. 1246-1252 ◽  
Author(s):  
J. C. Parker ◽  
R. W. Siegel
Keyword(s):  
Raman Spectra ◽  
Oxygen Deficiency ◽  
Spatial Inhomogeneity ◽  
Spectral Changes ◽  
Raman Microprobe ◽  
Phase Inhomogeneity ◽  
Quantitative Indicators ◽  
Raman Spectral ◽  
Line Positions

A Raman microprobe study of as-compacted nanophase TiO2 was carried out to investigate the spatial inhomogeneity of its anatase and rutile phases. Also, changes in the observed Raman spectra (line shifts and broadening) were investigated as a function of annealing at temperatures up to 600°C in argon or air. Microscopic phase inhomogeneity is observed and Raman spectral changes are shown to result from inhomogeneous oxygen deficiency in the nanophase TiO2. The line positions corresponding to the Raman active Eg modes in both anatase and rutile are found to be sensitive to this oxygen deficiency and are potential quantitative indicators of such deviations from stoichiometry.

Raman Spectral Investigation of the Complex Species of Ferric Chloride in Concentrated Aqueous Solution

1972 ◽  
Vol 26 (6) ◽  
pp. 579-584 ◽  
Author(s):  
A. L. Marston ◽  
S. F. Bush
Keyword(s):  
Aqueous Solution ◽  
New Species ◽  
Aqueous Solutions ◽  
Raman Spectra ◽  
Ferric Chloride ◽  
Line Pattern ◽  
Complex Species ◽  
Spectral Changes ◽  
Raman Spectral ◽  
A New Species

Raman spectra of concentrated aqueous solutions of ferric chloride were recorded in the spectral range 50 to 500 cm−1. In near-saturated solutions, spectra show a four-line pattern typical of the tetrahedral FeCl4– complex: 390 cm−1 (w); 335 cm−1 (vs, p); 135 cm−1 (w); 110 cm−1 (s). At lower concentrations a new species dominates the spectrum, showing characteristic Raman lines at 318 cm−1 (s, p) and 165 cm−1 (vw). Conventional investigations of spectral changes with concentration of Fe(III) and chloride, coupled with group theoretical arguments, indicate that the stoichiometry of the complex must be FeCl3 or lower. Of the several symmetries that a FeCl3 complex might assume (C2v, C3v, D2h (dimer), and D3h), the D3h trigonal bipyramid structure FeCl3·2H2O with three equatorial chloride ligands and two axial waters is most compatible with the spectral evidence.

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