Raman Spectroscopic Observation of Collective Excitation of Molecular Vibrations in Liquid Methyl Iodide

1974 ◽  
pp. 225-231 ◽  
Author(s):  
G. Döge
Keyword(s):  
Methyl Iodide ◽  
Collective Excitation ◽  
Spectroscopic Observation ◽  
Molecular Vibrations ◽  
Raman Spectroscopic

Micro-Raman Spectroscopic Observation of Water Expulsion Induced Destruction of Hydrophobic Clusters in Crystalline Lysozyme

2009 ◽  
Vol 113 (29) ◽  
pp. 9633-9635 ◽  
Author(s):  
Jing-Jing Shou ◽  
Guang Zeng ◽  
Yun-Hong Zhang ◽  
G. Q. (Max) Lu
Keyword(s):  
Spectroscopic Observation ◽  
Raman Spectroscopic

In situ Raman Spectroscopic Observation of Polymer Chains in Semi-Crystalline Polyethylene Solids

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Yusuke Hiejima ◽  
Takumitsu Kida ◽  
Koh-hei Nitta
Keyword(s):  
Conformational Changes ◽  
Tensile Elongation ◽  
Spectroscopic Observation ◽  
Polymer Chains ◽  
Trans Conformation ◽  
Raman Spectroscopic ◽  
Higher Temperature ◽  
Microscopic Origin ◽  
Crystalline Polyethylene

AbstractIn situ Raman spectroscopy is applied for polyethylene solid under various environments to elucidate the morphological and conformational changes. The trans conformation retains up to higher temperature for high-density polyethylene, reflecting higher stability of the orthorhombic crystals composed of stacked trans chains. It is suggested that the conversion of the non-crystalline trans chains to the crystalline phase is the microscopic origin of thermal history in the crystallinity, whereas the transformation between the trans and gauche conformers is practically in thermal equilibrium. Microscopic and dynamic mechanism of deformation during uniaxial stretching is investigated for the molecular orientation and the microscopic load sharing on the crystalline and amorphous chains. Lower crystallinity results in smoother and higher orientation toward the stretching direction, as well as higher load on the amorphous chains, during tensile elongation.

Cigarette smoke-induced changes in the murine vocal folds: a Raman spectroscopic observation

The Analyst ◽  
2020 ◽  
Vol 145 (23) ◽  
pp. 7709-7717
Author(s):  
Elizabeth Erickson-DiRenzo ◽  
S. P. Singh ◽  
Joshua D. Martinez ◽  
Santiago E. Sanchez ◽  
Meena Easwaran ◽  
...  
Keyword(s):  
Cigarette Smoke ◽  
Molecular Level ◽  
Vocal Folds ◽  
Spectroscopic Observation ◽  
Spectroscopic Methods ◽  
Label Free ◽  
Raman Spectroscopic ◽  
Induced Changes

Raman spectroscopic methods are being projected as novel tools to study the early invisible molecular level changes in the vocal folds in a label-free manner.

Raman-Spectroscopic Observation of the Σ-diads of 12C16O18O and 12C16O17O

1977 ◽  
Vol 32 (9) ◽  
pp. 1070-1071 ◽  
Author(s):  
K. Srinivasan ◽  
H. Finsterhölzl ◽  
H. W. Klöckner ◽  
D. Illig ◽  
H. W. Schrötter
Keyword(s):  
Raman Spectrum ◽  
Spectroscopic Observation ◽  
Fermi Resonance ◽  
Raman Spectroscopic

AbstractThe Fermi resonance doublets of 12C16O18O and 12C16O17O were identified as weak Q-branches in the Raman spectrum of natural CO2.

Raman spectroscopic observation of dehydrogenation in ball-milled LiNH2–LiBH4–MgH2 nanoparticles

2010 ◽  
Vol 35 (12) ◽  
pp. 6323-6331 ◽  
Author(s):  
Jason R. Hattrick-Simpers ◽  
James E. Maslar ◽  
Michael U. Niemann ◽  
Chun Chiu ◽  
Sesha S. Srinivasan ◽  
...  
Keyword(s):  
Spectroscopic Observation ◽  
Raman Spectroscopic

Raman Spectroscopic Observation of Laser-Induced Oxidation of Transition-Metal Borides, Carbides, and Nitrides

1989 ◽  
Vol 43 (1) ◽  
pp. 134-138 ◽  
Author(s):  
G. M. Begun ◽  
C. E. Bamberger
Keyword(s):  
Raman Spectra ◽  
Laser Power ◽  
Spectroscopic Observation ◽  
Laser Power Density ◽  
Oxide Formation ◽  
Raman Spectroscopic ◽  
Laser Raman ◽  
Surface Oxides ◽  
Raman Microprobe ◽  
Metal Borides

Laser Raman microprobe examination in air of small-particle-sized (powders and whiskers) TiN, TiB2, TiC, WC, ZrN, and NbN revealed the formation of surface oxides, which were induced by laser heating. The rate of oxide formation varied with the particle size of the samples and the laser power density applied. The oxides produced were characterized by their Raman spectra. Thus, the Raman spectra obtained with a microprobe should always be carefully analyzed to ascertain whether oxidation or decomposition of so-called inert materials, especially in powder form, has occurred.

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