Characterization of Partially Sulfonated Polystyrene-block-poly(ethylene-ran-butylene)-block-polystyrene Thin Films for Spectroelectrochemical Sensing

2009 ◽  
Vol 81 (16) ◽  
pp. 6756-6764 ◽  
Author(s):  
Nebojša Pantelić ◽  
Sara E. Andria ◽  
William R. Heineman ◽  
Carl J. Seliskar
Keyword(s):  
Thin Films ◽  
Sulfonated Polystyrene ◽  
Spectroelectrochemical Sensing ◽  
Poly Ethylene

Optical Characterization of Thin Films Poly (Ethylene Oxide) Doped with Cesium Iodide

2018 ◽  
Vol 10 (5) ◽  
pp. 05016-1-05016-4
Author(s):  
Mohammed Al-Tweissi ◽  
◽  
Mou'ad A. Tarawneh ◽  
M. Q. Owaidat ◽  
Monther Alsboul ◽  
...  
Keyword(s):  
Thin Films ◽  
Ethylene Oxide ◽  
Optical Characterization ◽  
Cesium Iodide ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

Thin-film synthesis and microstructure characterization of the poly(vinyl alcohol) matrix with functionalized carbon nanotubes

2007 ◽  
Vol 22 (7) ◽  
pp. 1872-1878 ◽  
Author(s):  
Xiaoling He ◽  
Song Xu ◽  
Andrey V. Sklyarov ◽  
Steven Hardcastle
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Carbon Nanotubes ◽  
Ethylene Glycol ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Poly Ethylene Glycol ◽  
Nanocomposite Thin Films ◽  
Poly Ethylene

We report on the synthesis and surface characterization of thin-film nanocomposites using functionalized single-walled carbon nanotubes (CNTs) with a diamine-terminated oligomeric poly(ethylene glycol) [poly(ethylene glycol) bis (3-aminopropyl)-terminated 1500]. The functionalized CNT samples are soluble in highly polar solvents. Their common solubility allows for the intimate mixing of the functionalized nanotubes with the matrix polymer–poly(vinyl alcohol) by dip coating and wet casting to form nanocomposite thin films. We demonstrate the alignment of the CNT bundles in the thin films that are formed without the external field forces. We present our results and discuss alignment reorientations from the characterizations of the nanocomposite thin films by using a Raman spectrometer, scanning electron microscopy, and atomic force microscopy.

scholarly journals The Optical and Microstructural Characterization of the Polymeric Thin Films with Self-Assembly Nanoparticles Prepared by Spin-Coating Techniques

Crystals ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 390 ◽  
Author(s):  
Kwang-Ming Lee ◽  
Chia-Hong Huang ◽  
Chia-Yu Chang ◽  
Chung-Cheng Chang
Keyword(s):  
Thin Films ◽  
Ethylene Glycol ◽  
Self Assembly ◽  
Annealing Temperature ◽  
Excitation Wavelength ◽  
Poly Ethylene Glycol ◽  
Pl Spectrum ◽  
Pl Intensity ◽  
Poly Ethylene

anhydride-poly(ethylene glycol) co-polymer (A-PEGCP) has been synthesized from maleic anhydride, poly(ethylene glycol) and bisphenol-A diglycidyl ether without using any organic solvent. The thin films produced from A-PEGCP solution were spin-coated on ITO-coated glass. The nanoparticles are observed in the thin films. It is proposed that the nanoparticle is built by a self-assembly process with bisphenol-A aggregates and poly (ethylene glycol) moieties. The effects of concentration, thermal annealing, excitation wavelength and moisture on the optical and nanostructured characterization of the thin films are investigated in this study. Photoluminescence (PL) spectrum of the thin film on ITO-coated glass has a peak of about 450 nm that extends from 360 to 550 nm under 325 nm excitation. The increase in PL intensity is accompanied by a red shift of PL spectrum as concentration increases. Moreover, the slightly red shift of PL spectrum is also observed as annealing temperature increases. Meanwhile, PL intensity negligibly decreases with annealing temperature. The degradation in PL intensity is apparent due to moisture. The excitation-wavelength dependent photoluminescence (EWDP) is observed in the thin film. UV-Vis absorption spectra of the thin films are red-shifted with concentration due to more molecular aggregation. The highest occupied molecular orbital (HOMO) energy is −9.52 eV. The optical band-gap energy is 4.09–4.44 eV.

Electron microscopic characterization of diamond thin films and substrates for diamond heteroepitaxial growth

1989 ◽  
Vol 47 ◽  
pp. 592-593
Author(s):  
J.B. Posthill ◽  
R.P. Burns ◽  
R.A. Rudder ◽  
Y.H. Lee ◽  
R.J. Markunas ◽  
...  
Keyword(s):  
Thin Films ◽  
Wide Band ◽  
Deposition Process ◽  
Heteroepitaxial Growth ◽  
Electron Microscopic ◽  
Wide Band Gap ◽  
Lattice Matching ◽  
Different Types ◽  
Diamond Thin Films

Because of diamond’s wide band gap, high thermal conductivity, high breakdown voltage and high radiation resistance, there is a growing interest in developing diamond-based devices for several new and demanding electronic applications. In developing this technology, there are several new challenges to be overcome. Much of our effort has been directed at developing a diamond deposition process that will permit controlled, epitaxial growth. Also, because of cost and size considerations, it is mandatory that a non-native substrate be developed for heteroepitaxial nucleation and growth of diamond thin films. To this end, we are currently investigating the use of Ni single crystals on which different types of epitaxial metals are grown by molecular beam epitaxy (MBE) for lattice matching to diamond as well as surface chemistry modification. This contribution reports briefly on our microscopic observations that are integral to these endeavors.

Sign in / Sign up

Export Citation Format

Share Document