scholarly journals Optical parameters of amorphous arsenic triselenide multilayers prepared by spin coating

2017 ◽  
pp. 5133-5140
Author(s):  
Salah. M. M.Salman
Keyword(s):  
Thin Films ◽  
Spin Coating ◽  
Glass Substrate ◽  
Room Temperature ◽  
Amine Salt ◽  
Optical Parameters ◽  
Multilayer Thin Films ◽  
Transmission Spectra ◽  
Coating Solution ◽  
Arsenic Triselenide

Multilayer thin films of amorphous arsenic triselenide (As2Se3) were obtained by spin coating solution of an amine salt in amide on glass substrate.  The deposited multilayers in the range of 500 to 1000 nm were optically characterized by measuring the transmission spectra at room temperature.  All used samples were baked and annealed for different periods of times and temperatures.  The effect of layers number, baking times and temperatures on optical parameters were investigated.  The thickness of the prepared samples up to four layers was ranging between 0.1 µm to 0.2 µm.

Electrical Property of Transparent Thin Films TiO2 and Sr-Doped TiO2 Developed by Spin Coating

2013 ◽  
Vol 665 ◽  
pp. 263-266
Author(s):  
M.H. Mangrola ◽  
A.S. Pillai ◽  
B.H. Parmar ◽  
V.G. Joshi
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Electrical Property ◽  
Spin Coating ◽  
Glass Substrate ◽  
High Frequency ◽  
Ac Conductivity ◽  
Room Temperature ◽  
Coating Technique ◽  
Increase With Increase

Transparent thin film of pure TiO2and 3% Sr-doped TiO2(Ti0.97Sr0.03O2) were prepared by spin coating technique onto well-cleaned glass substrate. The dielectric behaviour of the films were studied at room temperature for different frequencies. The capacitance of both films were is found to decrease with increasing frequency and at higher frequencies capacitance becomes constant. AC conductivity is found to continuously increase with increase in the frequency. At high frequency it doesnt show any change and remains almost constant.

Photoconductivity of Nanocomposite MEH-PPV: TiO2 Thin Films

2011 ◽  
Vol 13 ◽  
pp. 87-92 ◽  
Author(s):  
M.S.P Sarah ◽  
F.S. Zahid ◽  
M.Z. Musa ◽  
U.M. Noor ◽  
Z. Shaameri ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Surface Morphology ◽  
Spin Coating ◽  
Glass Substrate ◽  
Spin Coating Technique ◽  
Coating Technique ◽  
Current Voltage ◽  
Current Voltage Characteristics

The photoconductivity of a nanocomposite MEH-PPV:TiO2 thin film is investigated. The nanocomposite MEH-PPV:TiO2 thin film was deposited on a glass substrate by spin coating technique. The composition of the TiO2 powder was varied from 5 wt% to 20 wt% (with 5 wt% interval). The concentration of the MEH-PPV is given by 1 mg/1 ml. The current voltage characteristics were measured in dark and under illumination. The photoconductivity showed increment in value as the composition of the TiO2 is raised in the polymer based solution. The absorption showed augmentation as the amount of TiO2 is increased. The escalation of the current voltage is then supported by the results of surface morphology.

Enhanced coercivity of HCP Co–Pt alloy thin films on a glass substrate at room temperature for patterned media

2015 ◽  
Vol 391 ◽  
pp. 12-16 ◽  
Author(s):  
Y.S. Chen ◽  
An-Cheng Sun ◽  
H.Y. Lee ◽  
Hsi-Chuan Lu ◽  
Sea-Fue Wang ◽  
...  
Keyword(s):  
Thin Films ◽  
Glass Substrate ◽  
Room Temperature ◽  
Patterned Media ◽  
Pt Alloy

FABRICATION OF QCM TYPE SMOTHER DETECTION SENSOR BY PLASMA POLYMERIZING SnOx ORGANIC-LIKE FILMS AND SPIN COATING WITH POLY ETHYLENE GLYCOL

2012 ◽  
Vol 24 (02) ◽  
pp. 179-183
Author(s):  
Ko-Shao Chen ◽  
Shu-Chuan Liao ◽  
Hsin-Ming Wu ◽  
Yu-Chia Tsao ◽  
Hong-Ru Lin
Keyword(s):  
Thin Films ◽  
Ethylene Glycol ◽  
Spin Coating ◽  
Room Temperature ◽  
Plasma Deposition ◽  
Post Treatment ◽  
Detection Sensitivity ◽  
Poly Ethylene Glycol ◽  
Frequency Drop ◽  
Poly Ethylene

Quartz crystal microbalances (QCM) are transducers for chemical and biochemical sensing. The oscillation frequency of QCM is affected by the adsorbed mass on the surface. In this work, a new room temperature type gas sensor device fabricated by organically hybridized plasma deposition of tetramethyltin (TMT) and oxygen. Post treatment with poly ethylene glycol (PEG) was developed to detect the ambient environmental smother, and the responses of the fabricated sensor to smother detection were investigated. SnO x C y thin films on the sensor electrodes were obtained by plasma deposition from TMT and O 2 gas mixtures at room temperature. A spin coating post treatment on the SnO x C y thin films turns into hydrophilic property. The response of the QCM sensor to the smother detection shows a frequency drop during the burning of candle and has good detection sensitivity with Δf equal to 2400 Hz. Repeated smother testing with the QCM type smother detection sensor also indicates the stability of the fabricated sensor.

Optical Properties of Ge23.5Pb20S56.5 Glassy System

2016 ◽  
Vol 723 ◽  
pp. 522-526
Author(s):  
Nadezhda Ivanovna Anisimova ◽  
Gennady Alekseevich Bordovsky ◽  
Rene Alejandro Castro ◽  
Lilia Ansafovna Nabiullina
Keyword(s):  
Thin Films ◽  
Refractive Index ◽  
Absorption Coefficient ◽  
Room Temperature ◽  
Fundamental Absorption Edge ◽  
Transmission Spectra ◽  
Glassy System ◽  
Static Structure ◽  
Structure Disorder ◽  
Disorder Parameter

The spectra of refractive index and absorption coefficient in thin films of Ge23.5Pb20S56.5 glassy system were calculated on the base of analysis of transmission spectra. The refractive index has values between 2.0 and 2.6 in the spectral range between 500 nm and 1200 nm. The existence of indirect allowed transitions with energy Eg = 1.70 ± 0.01 eV and phonon energy of wph= 0.11 eV at room temperature was found. For values of the absorption coefficient a < 103см –1 the fundamental absorption edge is described by exponential function known as Urbach-rule. The static structure disorder parameter wo, is equal to 0.06 eV.

TiO2 and Co multilayer thin films via DC magnetron sputtering at room temperature: Interface properties

2020 ◽  
Vol 163 ◽  
pp. 110293 ◽  
Author(s):  
Heiddy P. Quiroz ◽  
M. Manso-Silván ◽  
A. Dussan ◽  
Carlos Busó-Rogero ◽  
P. Prieto ◽  
...  
Keyword(s):  
Thin Films ◽  
Magnetron Sputtering ◽  
Room Temperature ◽  
Multilayer Thin Films ◽  
Interface Properties ◽  
Dc Magnetron Sputtering

Titanium Dioxide Thin Films: Effect of Annealed in Oxygen Ambient

2011 ◽  
Vol 364 ◽  
pp. 12-15 ◽  
Author(s):  
Mohd Nor Asiah ◽  
M.F. Achoi ◽  
Saifollah Abdullah ◽  
Mohamad Rusop
Keyword(s):  
Thin Films ◽  
Titanium Dioxide ◽  
Spin Coating ◽  
Quartz Substrate ◽  
Visible Region ◽  
Transmission Spectra ◽  
Atomic Force ◽  
Average Transmittance ◽  
Coating Method ◽  
Titanium Dioxide Thin Films

Titanium dioxide (TiO2) thin films deposited on quartz substrate by spin-coating method using titanium (IV) butoxide has been studied. The aim of this paper is to investigate the effect of annealing in oxygen ambient on the morphology and optical properties of thin films. The distinct variations in the morphology of the thin films were observed from atomic force microscope (AFM) images. The transmission spectra obtained from UV-VIS-NIR showed the TiO2thin films exhibited average transmittance value up to 80% in the visible region. Raman spectra of thin films annealed in O2shifted from 142 cm-1to 179 cm-1.

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