Investigation of vapor cryodeposited glasses and glass transition of tetrachloromethane films

Aldiyarov, A.; Nurmukan, A.; Sokolov, D.

doi:10.1016/j.apsusc.2019.144857

Cited by 6 publications

(9 citation statements)

References 30 publications

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“…Dangling bonds in IR spectra near 3700 cm −1 are a source of information about the structural properties of amorphous water ice and especially icy mixtures of water and other frozen gases. A similar spectral effect was found by our authors in a series of other experiments conducted at the Laboratory of Cryophysics and Cryotechnology at Al-Farabi Kazakh National University for various concentrations of mixtures of water with nitrogen, methane, ethanol, CO 2 , or CCl 4 [ 25 , 26 , 27 , 28 , 29 ].…”

Section: Discussionsupporting

confidence: 88%

Optical Studies of Thin Films of Cryocondensed Mixtures of Water and Admixture of Nitrogen and Argon

et al. 2022

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The interaction of host molecules with water molecules is of primary importance in astrophysical and atmospheric studies. Water-binding interactions continue to attract a broad interest in various fields, especially those related to the formation of assembly structures. Using the physical vapor deposition (PVD) method and a two-beam interferometer with a wavelength of 406 nm, the refractive indices of thin films of a water and nitrogen (argon) mixture were calculated in the range from 15 to 35 K. The results of temperature transformations of the obtained films from a two-beam interferometer, and thermal desorption characteristics from the temperature of condensation to the temperature of evaporation of water (15–180 K), are presented. The relationship between the signal of the interferometer, the refractive index, and the film thickness during glass transition is demonstrated.

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Section: Discussionsupporting

confidence: 88%

Optical Studies of Thin Films of Cryocondensed Mixtures of Water and Admixture of Nitrogen and Argon

et al. 2022

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“…Previously, we published a work devoted directly to the glass transition processes in cryo lms of pure carbon tetrachloride. [10] Temperature intervals were determined, interpreted as the transition between the amorphous glassy state of the cryocondensate lm to the crystal. This paper presents a proven technique for cryomatrix isolation of a research object in an inert gas matrix that is optically transparent in the IR range of research.…”

Section: Resultsmentioning

confidence: 99%

“…[9] In view of the above, IR spectrometric studies of the processes of formation and structural transformation of cryovacuum condensates of carbon tetrachloride were carried out in. [10] Thus, IR spectrometric studies can provide information about individual vibrations of the tetrachloromethane molecules, their response to thermally stimulated transformations in the samples under study. The aim of the research was to study the features of carbon tetrachloride cryocondensation and to determine the glass transition temperature of cryo lms formed at low temperatures.…”

Section: Introductionmentioning

confidence: 99%

IR Spectrometric Studies of CCL4 and Ar Gas Mixtures

Korshikov¹,

Sokolov²,

Potapchenko³

et al. 2023

J Low Temp Phys

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IR-spectrometric studies of cryo-deposition processes and properties of thin lms of cryo-vacuum condensates of a mixture of carbon tetrachloride and argon obtained by physical cryo-vacuum deposition at various concentrations have been carried out. The measurements were carried out in the temperature range 11 K − 100 K and the pressure of the gas phase 10 − 8 Torr − 10 − 4 Torr. The lm thickness in all experiments performed was d = 2 µm. The vibrational spectra of CCl4 in an argon matrix were measured in the frequency range 400-4200 cm − 1 at mixture concentrations (CCl 4 + Ar) as: (10%-90%; 5%-95%; 1%-99%) and after sublimation of the argon matrix. For the (CCl 4 + Ar) system, thermal adsorption curves for the yield of the matrix gas (Ar) were obtained in the temperature range of 40K and 90K. The existence of cryocapture of CCl 4 molecules of the substance of the Ar matrix was found. The results obtained suggest that, in low-temperature studies of self-organization processes in thin lms, carbon tetrachloride can be used as a matrix.

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“…A similar spectral effect was found by our authors in a series of other experiments conducted at the Laboratory of Cryophysics and Cryotechnology at Al-Farabi Kazakh National University for various concentrations of mixtures of water with nitrogen, methane, ethanol, CO 2 , or CCl 4 . 3 , 27 − 30 …”

Section: Discussionmentioning

confidence: 99%

Infrared Analysis and Effect of Nitrogen and Nitrous Oxide on the Glass Transition of Methanol Cryofilms

et al. 2022

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Methanol plays an important role in studying the structure and dynamics of hydrogen bonds in alcohols and other physiologically important compounds in the condensed state. The physical vapor deposition method and two-beam interferometry make it possible to study the structure of polyatomic molecules, the nature and character of intermolecular interactions, and the internal structure of various compounds. Thus, it becomes possible to analyze changes in the internal structure of substances near the points of their phase transitions and glass transitions at ultralow temperatures. In this work, we have studied the effect of nitrogen and nitrous oxide on the dependence of refractive indices of methanol on temperature and on structural-phase transformations upon heating from 16 to 160 K.

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Investigation of vapor cryodeposited glasses and glass transition of tetrachloromethane films

Cited by 6 publications

References 30 publications

Optical Studies of Thin Films of Cryocondensed Mixtures of Water and Admixture of Nitrogen and Argon

Optical Studies of Thin Films of Cryocondensed Mixtures of Water and Admixture of Nitrogen and Argon

IR Spectrometric Studies of CCL4 and Ar Gas Mixtures

Infrared Analysis and Effect of Nitrogen and Nitrous Oxide on the Glass Transition of Methanol Cryofilms

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