IR spectroscopy of the low-frequency phonon spectrum of the TbFe3(BO3)4single-crystal

2014 ◽  
Vol 40 (12) ◽  
pp. 1087-1096 ◽  
Author(s):  
V. S. Kurnosov ◽  
V. V. Tsapenko ◽  
L. N. Bezmaternykh ◽  
I. A. Gudim
Keyword(s):  
Ir Spectroscopy ◽  
Phonon Spectrum ◽  
Low Frequency

LOW-FREQUENCY PHONON SPECTRUM PECULIARITIES OF Sn-Pb ALLOYS

1978 ◽  
Vol 39 (C6) ◽  
pp. C6-1037-C6-1038
Author(s):  
V.M. Pan ◽  
B.G. Nikitin ◽  
A.M. Korostil ◽  
V.V. Nemoshkalenko ◽  
V.P. Dovgopol ◽  
...  
Keyword(s):  
Phonon Spectrum ◽  
Low Frequency

scholarly journals THE PHONON SPECTRUM OF THE OCTAGONAL TILING

1993 ◽  
Vol 07 (06n07) ◽  
pp. 1505-1525 ◽  
Author(s):  
J. LOS ◽  
T. JANSSEN ◽  
F. GÄHLER
Keyword(s):  
Specific Heat ◽  
Density Of States ◽  
Phonon Spectrum ◽  
Low Frequency ◽  
Debye Model ◽  
Square Lattice ◽  
Total Density ◽  
Unit Cells ◽  
Linear Behaviour ◽  
Total Density Of States

A study of the phonon spectrum of the octagonal tiling is presented, by calculating and analysing the properties of the spectrum of perfect and randomized commensurate approximants with unit cells containing up to 8119 vertices. The total density of states, obtained by numerical integration over the Brillouin zone, exhibits much structure, and in the low frequency range of the spectrum there is deviation from the normal linear behaviour in the form of pseudogaps. For randomized approximants these pseudogaps disappear and the density of states is globally smoothened. It turns out that the widths of the gaps in the dispersion vanish in the low frequency limit. Therefore the scaling behaviour of the lowest branches tends to the behaviour of an absolutely continuous spectrum, which is not the case at higher frequencies. As an application, the vibrational specific heat of the different tiling models is calculated and compared to the specific heat of a square lattice and of a Debye model.

scholarly journals VIBRATION SPECTRUM AND MOLECULAR STRUCTURE OF 3-AMINOPHTHALIMIDE BY IR SPECTROSCOPY AND QUANTUM-CHEMICAL CALCULATION

2018 ◽  
Vol 59 (3) ◽  
pp. 35
Author(s):  
Denis S. Savelyev ◽  
Mikhail K. Islyaikin ◽  
Georgiy V. Girichev
Keyword(s):  
Molecular Structure ◽  
Ir Spectroscopy ◽  
Ir Spectra ◽  
Quantum Chemical Calculation ◽  
Quantum Chemical ◽  
Vibration Spectrum ◽  
Low Frequency ◽  
Chemical Calculation ◽  
Chemical Methods ◽  
Quantum Chemical Methods

The IR spectra of solid 3-aminophthalimide (3-AF) were obtained and interpreted. Quantum-chemical calculations of vibration spectra were performed at different theory levels. Comparison of experimental and calculated IR spectra shows a variability of quantum chemical methods in predicting vibration spectrum in low-frequency field and fine features of geometric structure of the molecule of 3-AF.

Low-Frequency Optical-Phonon Spectrum of Benzil

1969 ◽  
Vol 187 (3) ◽  
pp. 1128-1131 ◽  
Author(s):  
R. Claus ◽  
H. H. Hacker ◽  
H. W. Schrötter ◽  
J. Brandmüller ◽  
S. Haussühl
Keyword(s):  
Optical Phonon ◽  
Phonon Spectrum ◽  
Low Frequency

Preparation and characterization of cross-linked poly (vinyl alcohol)-graphene oxide nanocomposites as an interlayer for Schottky barrier diodes

2018 ◽  
Vol 32 (01) ◽  
pp. 1750276 ◽  
Author(s):  
Lida Badrinezhad ◽  
Çigdem Bilkan ◽  
Yashar Azizian-Kalandaragh ◽  
Ali Nematollahzadeh ◽  
İkram Orak ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Ir Spectroscopy ◽  
Chemical Interaction ◽  
Low Frequency ◽  
Sem Analysis ◽  
Poly Vinyl Alcohol ◽  
X Ray Diffraction ◽  
Voltage Dependent ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

Cross-linked polyvinyl alcohol (PVA) graphene oxide (GO) nanocomposites were prepared by simple solution-mixing route and characterized by Raman, UV–visible and fourier transform infrared (FT-IR) spectroscopy analysis, X-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques. The XRD pattern and SEM analysis showed significant changes in the nanocomposite structures, and the FT-IR spectroscopy results confirmed the chemical interaction between the GO filler and the PVA matrix. After these morphological characterizations, PVA-GO-based diodes were fabricated and their electrical properties were characterized using current–voltage (I–V) and impedance-voltage-frequency (Z-V-f) measurements at room temperature. Semilogarithmic I–V characteristics of diode showed a good rectifier behavior. The values of C and G/[Formula: see text] increased with decreasing frequency due to the surface/interface states (N[Formula: see text]) which depend on the relaxation time and the frequency of the signal. The voltage, dependent profiles of N[Formula: see text] and series resistance (R[Formula: see text]) were obtained from the methods of high-low frequency capacitance and Nicollian and Brews, respectively. The obtained values of N[Formula: see text] and R[Formula: see text] were attributed to the use of cross-linked PVA-GO interlayer at the Au/n-Si interface.

Low-frequency IR spectroscopy in the study of the structures of cellulose and cellulose nitrates

1993 ◽  
Vol 62 (4) ◽  
pp. 323-336 ◽  
Author(s):  
R M Mukhamadeeva ◽  
R G Zhbankov ◽  
Vladimir F Sopin ◽  
G N Marchenko
Keyword(s):  
Ir Spectroscopy ◽  
Low Frequency ◽  
Cellulose Nitrates

A Study on the Fine Structure of the Lateral Line Organ of the Sea Eel

1973 ◽  
Vol 31 ◽  
pp. 648-649
Author(s):  
K. Hama
Keyword(s):  
Fine Structure ◽  
Electron Microscope ◽  
Lateral Line ◽  
Low Frequency ◽  
Sensory Cells ◽  
Apical Surface ◽  
Voltage Electron ◽  
Sensory Epithelia ◽  
Low Frequency Vibration ◽  
Transmission Electron

The lateral line organs of the sea eel consist of canal and pit organs which are different in function. The former is a low frequency vibration detector whereas the latter functions as an ion receptor as well as a mechano receptor.The fine structure of the sensory epithelia of both organs were studied by means of ordinary transmission electron microscope, high voltage electron microscope and of surface scanning electron microscope.The sensory cells of the canal organ are polarized in front-caudal direction and those of the pit organ are polarized in dorso-ventral direction. The sensory epithelia of both organs have thinner surface coats compared to the surrounding ordinary epithelial cells, which have very thick fuzzy coatings on the apical surface.

Lectin Binding to Human Breast Tumor Cells

1976 ◽  
Vol 34 ◽  
pp. 34-35
Author(s):  
Robert E. Nordquist ◽  
J. Hill Anglin ◽  
Michael P. Lerner
Keyword(s):  
Carcinoma Cell ◽  
Ricinus Communis ◽  
Lectin Binding ◽  
Low Frequency ◽  
Breast Carcinoma Cell Line ◽  
Human Breast ◽  
Human Breast Tumor ◽  
Duct Carcinoma ◽  
Specific Antigens ◽  
Ricin Agglutinin

A human breast carcinoma cell line (BOT-2) was derived from an infiltrating duct carcinoma (1). These cells were shown to have antigens that selectively bound antibodies from breast cancer patient sera (2). Furthermore, these tumor specific antigens could be removed from the living cells by low frequency sonication and have been partially characterized (3). These proteins have been shown to be around 100,000 MW and contain approximately 6% hexose and hexosamines. However, only the hexosamines appear to be available for lectin binding. This study was designed to use Concanavalin A (Con A) and Ricinus Communis (Ricin) agglutinin for the topagraphical localization of D-mannopyranosyl or glucopyranosyl and D-galactopyranosyl or DN- acetyl glactopyranosyl configurations on BOT-2 cell surfaces.

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