Data on optical microscopy and vibrational modes in Diphenyl Dinaphthothienothiophene thin films

In this article, we have set up protocols for fabricating thermoplastic polyurethane thin films of about 30 μm (neat polyurethane and carbon nanofiber (CNF) containing polyurethane) via ultrasound assisted atomization at 20 kHz. From processing to thin film peel off, we have set up procedures for fabricating our samples. Using optical microscopy, we have examined the manufacturing of these films from a droplet diameter perspective. Our optical microscopy results indicate that the final film microstructure was directly dependent on the physical properties of the neat/CNF reinforced solution. Mechanical testing of these films was then carefully carried out using a dynamic mechanical analyzer (DMA) unit utilizing a specialized thin film test clamp fixture. These test results were compared with control cast films fabricated from the same solutions. For the similar extensions, we observed a drastic increase in the softness of the atomized film. We surmise that the ultrasound assisted droplet generation concurrent with secondary atomization and evaporation could have resulted in reduction of the molecular weight of the polyurethane in our atomized samples relative to the neat ones. Differential scanning calorimetry (DSC) scans have been conducted to confirm the changes in molecular weight. Although results were inconclusive there is evidence of exotherms at 49C in our atomized samples suggested of changes to molecular weight distribution.

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Probing the Spatial Heterogeneity of Carrier Relaxation Dynamics in CH 3 NH 3 PbI 3 Perovskite Thin Films with Femtosecond Time‐Resolved Nonlinear Optical Microscopy

Advanced Optical Materials ◽

10.1002/adom.201901185 ◽

2019 ◽

Vol 7 (22) ◽

pp. 1901185 ◽

Cited By ~ 2

Author(s):

Jin Yu ◽

Zhongguo Li ◽

Yuheng Liao ◽

Charles Kolodziej ◽

Seher Kuyuldar ◽

...

Keyword(s):

Thin Films ◽

Spatial Heterogeneity ◽

Optical Microscopy ◽

Nonlinear Optical ◽

Relaxation Dynamics ◽

Nonlinear Optical Microscopy ◽

Time Resolved ◽

Carrier Relaxation ◽

Carrier Relaxation Dynamics

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Raman scattering from sputtered films of YBa2Cu3Oy

Canadian Journal of Physics ◽

10.1139/p88-115 ◽

1988 ◽

Vol 66 (8) ◽

pp. 695-699 ◽

Cited By ~ 5

Author(s):

J. Chrzanowski ◽

J. C. Irwin ◽

R. R. Parsons ◽

P. J. Mulhern

Keyword(s):

Thin Films ◽

High Temperature ◽

Magnetron Sputtering ◽

Raman Scattering ◽

Oxygen Content ◽

High Temperature Superconductor ◽

Superconducting Films ◽

Vibrational Modes ◽

Dc Magnetron Sputtering ◽

Sputtered Films

Thin films of the high-temperature superconductor YBa2Cu3Oy have been deposited on Al2O3 and MgO substrates by dc magnetron sputtering. Raman-scattering experiments have been carried out on these films at various temperatures. The results of these experiments have been used to estimate the amount of impurity phases in the films, to characterize the actual superconducting films, and to test for any preferential orientation within the film. Vibrational modes of the superconductor were found at 148, 226, and 338 cm−1 in both sets of films, at 446 and 491 cm−1 in the Al2O3 films, and at 441 and 500 cm−1 in the MgO films. The measured frequencies of the highest energy modes have been used to determine the oxygen content of the films.

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