The Feature of Laser Deposition of Polymeric Composite Films from an Active Gas Phase

2011 ◽  
Vol 480-481 ◽  
pp. 30-35 ◽  
Author(s):  
Zhu Bo Liu ◽  
Xiao Hong Jiang ◽  
Bing Zhou ◽  
M.A. Yarmolenko ◽  
D.L. Gorbachev ◽  
...  

The organic-silicon films, polytetrafluorethylene (PTFE) films and its composite films with copper have been fabricated from an active gas phase by pulse laser dispersion from initial powder species. The features of all films obtained were studied with the application of attenuated total reflection-Fourier transform infrared (ATR-FTIR) spectroscopy. Our results suggest that the wavelength of laser radiation impact a strong effect on the molecular structure of all films. Specifically, the peaks corresponding to the detachment of C-H bonds in the organic-silicon films and its Cu doped films at a laser wavelength of 532 nm and the destruction of the Si-O-Si groups at 266 nm due to the ultraviolet radiation have been observed. Interestingly, the concentration of Si-С6Н5 groups relative increases with a decremental of the wavelength of laser radiation. In addition, the PTFE films formed at a laser wavelength of 355 nm presented a lower order degree and high amorphous phase, while PTFE-Cu composite films at laser wavelength 266 nm exhibited enhanced crystallinity due to the presence of copper species, wherein being served as nucleation centers. Remarkably, the wavelengths of laser radiation nearly play no effect on the orderness of PTFE-Cu composite films.

1981 ◽  
Vol 42 (C4) ◽  
pp. C4-779-C4-782 ◽  
Author(s):  
F. J. Demond ◽  
G. Müller ◽  
H. Damjantschitsch ◽  
H. Mannsperger ◽  
S. Kalbitzer ◽  
...  

2020 ◽  
pp. 139-143

Natural dyes were followed and prepared from a pomegranate, purple carrot, and eggplant peel. The absorbance spectra was measured in the wavelength range 300-800 nm. The linear properties measurements of the prepared natural dye freestanding films were determined include absorption coefficient (α0), extinction coefficient (κ), and linear refraction index (n). The nonlinear refractive index n2 and nonlinear absorption coefficient β2 of the natural dyes in the water solution were measured by the optical z-scan technique under a pumped solid state laser at a laser wavelength of 532 nm. The results indicated that the pomegranate dye can be promising candidates for optical limiting applications with significantly low optical limiting of 3.5 mW.


2014 ◽  
Vol 52 (6) ◽  
pp. 89-94
Author(s):  
N. Dumbrova ◽  
◽  
N. Molchanyuk ◽  
T. Romanova ◽  
N. Gavronskaya ◽  
...  

2021 ◽  
Vol 120 ◽  
pp. 111416
Author(s):  
A.A.A. Darwish ◽  
A.M. Aboraia ◽  
S.R. Alharbi ◽  
A.M. El Shafey ◽  
Zuhair M. Mohammedsaleh ◽  
...  

2010 ◽  
Vol 114 (10) ◽  
pp. 4340-4344 ◽  
Author(s):  
Takeshi Terao ◽  
Chunyi Zhi ◽  
Yoshio Bando ◽  
Masanori Mitome ◽  
Chengchun Tang ◽  
...  

2017 ◽  
Vol 231 (11-12) ◽  
Author(s):  
Tianlin Cao ◽  
Fanyu Zhao ◽  
Zulin Da ◽  
Fengxian Qiu ◽  
Dongya Yang ◽  
...  

AbstractIn this work, an amino-functionalized graphene oxide (AFGO) was synthesized by graphene oxide (GO) and ethylene diamine. A novel amino-functionalized graphene oxide/azobenzene polyimide (AFGO/ACPI) was synthesized with AFGO, azobenzene chromophore and pyromellitic dianhydride (PMDA). The structure, mechanical and thermal property of AFGO/ACPI were characterized and measured by fourier transform infrared, UV-visible spectroscopy, near-infrared spectrum, thermogravimetric analysis and differential scanning calorimetry. To obtain the refractive index of AFGO/ACPI at different temperature and wavelength (532 nm, 650 nm and 850 nm), the attenuated total reflection (ATR) method was used to measure, and thermo optic coefficients (dn/dT) were −7.22×10


Shinku ◽  
2000 ◽  
Vol 43 (3) ◽  
pp. 288-291 ◽  
Author(s):  
Naohiro HORII ◽  
Kunio OKIMURA ◽  
Akihiro INOUYE

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