Diagnostics of atomic- molecular interactions in nano-compositions organics-inorganics by means of infrared spectroscopy

Abstract This paper prolongs our studies of the formation and properties of the organic-inorganic scintillating compositions from activated polystyrene and inorganic nanoparticles from cesium iodid and sulfate. The compositions from the solution of polystyrene in benzene and nano- or micro-particles of cesium iodide were solidified in the form of thin films. Then some of the films were subjected to rolling. The variations of the infrared transmission spectra of the compositions were measured either during their solidification or after the solidification and rolling. The new absorption band was revealed in the process of the solidification and disappeared after it. The fractal-like structures of parallel rows were formed in the films. Quasi-periodical oscillations of the transmission spectra were found in several infrared regions ascribed to the interaction of the infrared radiation with the fractal super-structure of the films. The modifications of the absorption spectra found in our experiments are attributed to the interactions of polystyrene molecules with benzene molecules and nanoparticles of cesium iodide.

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Infrared transmission spectra of CuInSe2 thin films

Crystal Research and Technology ◽

10.1002/crat.2170180733 ◽

1983 ◽

Vol 18 (7) ◽

pp. K90-K92 ◽

Cited By ~ 13

Author(s):

H. Neumann ◽

H. Sobotta ◽

V. Riede ◽

B. Schumann ◽

G. Kühn

Keyword(s):

Thin Films ◽

Transmission Spectra ◽

Infrared Transmission

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Far-infrared transmission spectra of granular free-standing thin films ofYBa2Cu3Oxnear the percolation threshold

Physical Review B ◽

10.1103/physrevb.46.1107 ◽

1992 ◽

Vol 46 (2) ◽

pp. 1107-1113 ◽

Cited By ~ 6

Author(s):

S. Kilibarda-Dalafave ◽

H. K. Ng

Keyword(s):

Thin Films ◽

Percolation Threshold ◽

Far Infrared ◽

Transmission Spectra ◽

Infrared Transmission ◽

Free Standing

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Determination of Hydroxyl Number in Polymers by Infrared Spectroscopy: Comparison of Near-IR and Mid-IR

Applied Spectroscopy ◽

10.1366/0003702934048460 ◽

1993 ◽

Vol 47 (1) ◽

pp. 94-97 ◽

Cited By ~ 11

Author(s):

K. A. Bunding Lee ◽

Richard W. Chylla ◽

Timothy E. Janota

Keyword(s):

Thin Films ◽

Regression Analysis ◽

Infrared Spectroscopy ◽

Spin Coating ◽

Near Infrared ◽

Transmission Spectra ◽

Hydroxyl Number ◽

Mid Infrared ◽

Near Ir

A comparison of near-infrared (NIR) and mid-infrared (mid-IR) techniques for the determination of hydroxyl number in polyesters was made. Both of these analyses are faster and involve less exposure to irritating, highly toxic, and corrosive chemicals than the chemical analysis, although both techniques rely on developing calibration files. The mid-IR procedure consisted of making thin films of polymer on IR crystals by spin coating and taking transmission spectra. The program used for the analysis, Nicolet PLS Quant, compensated for the resulting indeterminate pathlength. The NIR procedure consisted of taking transmission spectra of the clear, viscous polymers in 4-mm cuvettes and using standard regression analysis of the spectra.

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First Nano-Infrared Spectroscopy and Imaging Measurements of Single Phospholipid Bilayers

10.26434/chemrxiv.5459617.v2 ◽

2018 ◽

Author(s):

Adrian Cernescu ◽

Michał Szuwarzyński ◽

Urszula Kwolek ◽

Karol Wolski ◽

Paweł Wydro ◽

...

Keyword(s):

Infrared Spectroscopy ◽

Ir Spectroscopy ◽

Absorption Band ◽

Spectral Region ◽

Near Field ◽

Phospholipid Bilayers ◽

Model Systems ◽

Absorption Bands ◽

Protein Complement ◽

20 Nm

<div><div>Scattering-mode Scanning Near-Field Optical Microscopy (sSNOM) allows one to obtain absorption spectra in the mid-IR region for samples as small as 20 nm in size. This configuration has made it possible to measure FTIR spectra of the protein complement of membranes. (Amenabar 2013) We now show that mid-IR sSNOM has the sensitivity required to measure spectra of phospholipids in individual bilayers in the spectral range 800 cm<sup>-1</sup>–1400 cm<sup>-1</sup>. We have observed the main absorption bands of the dipalmitoylphosphatidylcholine headgroups in this spectral region above noise level. We have also mapped the phosphate absorption band at 1070 cm<sup>-1</sup> simultaneously with the AFM topography. We have shown that we could achieve sufficient contrast to discriminate between single and multiple phospholipid bilayers and other structures, such as liposomes. This work opens the way to further research that uses nano-IR spectroscopy to describe the biochemistry of cell membranes and model systems.</div></div><div></div>

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