Vibrational Spectroscopy of Ordered Oxygen Adlayers on Ni/Cu(001) and Co/Cu(001) Thin Film Systems

1991 ◽  
Author(s):  
J. S. Kim ◽  
M. H. Mohamed ◽  
L. L. Kesmodel
Keyword(s):  
Thin Film ◽  
Vibrational Spectroscopy

scholarly journals Vibrational spectroscopy of thin film condensates of ethanol mixture with inert gase

2021 ◽  
Vol 78 (3) ◽  
pp. 24-33
Author(s):  
A.U. Aldiyarov ◽  
◽  
D.Y. Sokolov ◽  
A. Z. Tychengulova ◽  
D. Yerezhep ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Gas Phase ◽  
Vibrational Spectroscopy ◽  
Spectral Range ◽  
Inert Gas ◽  
Main Task ◽  
Inert Medium ◽  
Ethanol Mixture ◽  
Concentration Ratios

It is known that by changing the concentration in an inert medium, it is possible to form clusters of various sizes of any substance by condensing them on a cold substrate from the gas phase. Traditionally, such systems are presented by molecular cryocrystals. This paper demonstrates the results of IR spectro­metric studies of cryovacuum condensates of ethanol mixture with nitrogen. The main task of this study is to explain the complex, most often, ambiguous behavior of thin films of ethanol cryovacuum conden­sates in the process of its co­condensation with nitrogen. For this purpose, vibrational spectroscopy of cryodeposited thin films of “ethanol in nitrogen” mixtures in various concentration ratios was performed. The objects of research are thin films of cryocondensates of ethanol mixture with inert gas (N2). The sam­ples were condensed at the temperature T = 16 K. The pressure of the gas phase of the mixture during cryocondensation was kept at P = 10­5 Torr. The range of ethanol concentrations in the mixtures varied from 3% to 90%. The spectral range of measurements was considered in 400­-4200 1/cm. It is assumed that the change in the concentration of ethanol in the mixture leads to the formation of various cluster compositions of ethanol molecules dissolved in an inert medium.

Vibrational Spectroscopy Analysis of Oligothiophene Blend Film

2021 ◽  
Vol 317 ◽  
pp. 457-462
Author(s):  
Siti Zulaikha Ngah Demon ◽  
Nursaadah Ahmad Poad
Keyword(s):  
Thin Film ◽  
Vibrational Spectroscopy ◽  
Flexible Electronics ◽  
Indium Tin Oxide ◽  
Infrared Absorption Spectrum ◽  
Ambient Atmosphere ◽  
Raman Analysis ◽  
Blend Film ◽  
Molecular Ordering ◽  
Crucial Information

One of the challenges in fabricating organic semiconductor thin film is to produce bettermolecular ordering that compromise its electronic properties. Molecular ordering of amorphous thin film can be improved in many ways. Here, high molecular weight polylactic acid (PLA) is introduced as binding matrix to promote 3'''-didodecyl-2,2':5',2'':5'',2'''-quaterthiophene (4T) film’s homogeinity across indium tin oxide (ITO) surface. Molecular ordering of the spin coated biodegradable PLA and 4T blend film processed at ambient atmosphere was studied using two vibrational spectroscopy methods. The complementary analysis of infrared absorption spectrum and Raman spectrum had identified several vibrational modes contributed by thiophene rings and alkyl functional groups. The Raman analysis implied there is a slight change of thiophene ringsʼ molecular orientation due to compressive stress after introduction of polymer. Microscopic characteristics of oligothiophenes especially at the π-π conjugated backbones contained crucial information in order to exploit the oligothiophene as flexible electronics devices.

scholarly journals Metamaterial-enhanced terahertz vibrational spectroscopy for thin film detection

2017 ◽  
Vol 8 (1) ◽  
pp. 128 ◽  
Author(s):  
Jingya Xie ◽  
Xi Zhu ◽  
Xiaofei Zang ◽  
Qingqing Cheng ◽  
Lin Chen ◽  
...  
Keyword(s):  
Thin Film ◽  
Vibrational Spectroscopy

Vibrational spectroscopy of ordered oxygen adiayers on Ni/Cu(001) and Co/Cu(001) thin film systems

1992 ◽  
Vol 260 (1-3) ◽  
pp. 185-190 ◽  
Author(s):  
Jae-Sung Kim ◽  
Mohamed H. Mohamed ◽  
L.L. Kesmodel
Keyword(s):  
Thin Film ◽  
Vibrational Spectroscopy

Clean Electron Microscope Substrate Films Used for Micrometeorite Collection and Study

1967 ◽  
Vol 25 ◽  
pp. 366-367
Author(s):  
D. M. Davies ◽  
R. Kemner ◽  
E. F. Fullam
Keyword(s):  
Thin Film ◽  
Electron Microscope ◽  
High Altitude ◽  
Amyl Acetate ◽  
Temperature Variations ◽  
Film Forming ◽  
Film Specimen ◽  
Particulate Contaminants

All serious electron microscopists at one time or another have been concerned with the cleanliness and freedom from artifacts of thin film specimen support substrates. This is particularly important where there are relatively few particles of a sample to be found for study, as in the case of micrometeorite collections. For the deposition of such celestial garbage through the use of balloons, rockets, and aircraft, the thin film substrates must have not only all the attributes necessary for use in the electron microscope, but also be able to withstand rather wide temperature variations at high altitude, vibration and shock inherent in the collection vehicle's operation and occasionally an unscheduled violent landing.Nitrocellulose has been selected as a film forming material that meets these requirements yet lends itself to a relatively simple clean-up procedure to remove particulate contaminants. A 1% nitrocellulose solution is prepared by dissolving “Parlodion” in redistilled amyl acetate from which all moisture has been removed.

Microtomy of spherical Al2O3 powders

1983 ◽  
Vol 41 ◽  
pp. 74-75
Author(s):  
E.J. Jenkins ◽  
D.S. Tucker ◽  
J.J. Hren
Keyword(s):  
Thin Film ◽  
Size Range ◽  
Particle Aggregation ◽  
Ion Milling ◽  
Thin Sections ◽  
Α Phase ◽  
Convenient Means ◽  
Van Der Waals Attraction ◽  
Negative Feature ◽  
Film Substrate

The size range of mineral and ceramic particles of one to a few microns is awkward to prepare for examination by TEM. Electrons can be transmitted through smaller particles directly and larger particles can be thinned by crushing and dispersion onto a substrate or by embedding in a film followed by ion milling. Attempts at dispersion onto a thin film substrate often result in particle aggregation by van der Waals attraction. In the present work we studied 1-10 μm diameter Al2O3 spheres which were transformed from the amprphous state to the stable α phase.After the appropriate heat treatment, the spherical powders were embedded in as high a density as practicable in a hard EPON, and then microtomed into thin sections. There are several advantages to this method. Obviously, this is a rapid and convenient means to study the microstructure of serial slices. EDS, ELS, and diffraction studies are also considerably more informative. Furthermore, confidence in sampling reliability is considerably enhanced. The major negative feature is some distortion of the microstructure inherent to the microtoming operation; however, this appears to have been surprisingly small. The details of the method and some typical results follow.

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