Version - 1 (December 2018)


Atomic Layer Deposition of TiO2 From Tetrakis (Dimethylamino) Titanium And H2O On Commercial-Grade Iron: A Simple Method For Support Preparation
Jose Domingo Gonzalez-Ramirez, Maricela Villicañamendez, Hugo Tiznado- Vazquez, Gabriel Alonso-Nuñez, Jose Apolinar Cortes
Abstract       pdf Full text PDF
Index: 10.183x/A0708010111 aned
This report work describes a titanium dioxide (TiO2) atomic layer deposition (ALD) on a commercial-grade iron substrate from tetrakis (dimethylamino) titanium (TDMAT) and de-ionized water as titanium and oxygen precursors, respectively. This particular substrate was prepared in a short period of time (approximately 20 min) by a simple procedure, which could represent a new and interesting option to elaborate thin films through an ALD process. The TiO2 deposition was studied at the support temperature of 225°C. The number of ALD cycles was varied in the range of 50 cycles to 250 cycles, and the effects of this parameter were investigated. Samples were characterized by XPS, XRD, RS, SEM and AFM analyses in order to scrutinize their composition and microstructure. TiO2 films grew as anatase phase, which was gradually developed with a rising number of ALD cycles. XPS indicated a moderate silicon contamination due to sandpapers used during the substrate preparation, which was similar for all samples. However, the morphology and topography of these layers were clearly determined by the iron support surface. Rough TiO2 films were obtained with RMS roughness of at least 89 nm............
Author Keywords:- TiO2; TDMAT; Atomic layer deposition; Iron support; Wustite; Raman spectroscopy.
e-ISSN: 2319-183X, p-ISSN: 2319-1821 Source Type: Journal Original Language: English
Document Type: Article Number of pages: 11
© Copyright 2014, All rights reserved.

Control Of Synchronous Electromotor by Voltage Parameters Change in Stator Winding With Constant Excitation Current
Biya Motto Frederic, Tchuidjan Roger, Ndzana Benoît, Tatsa Tchinda Colince
Abstract       pdf Full text PDF
Index: 10.183x/B0708011215 aned
In this paper, we study the control algorithm of electromagnetic torque and rotation speed for a synchronous electromotor with constant excitation current.
Author Keywords:- Synchronous electromotor, Voltage parameters change, excitation current.
e-ISSN: 2319-183X, p-ISSN: 2319-1821 Source Type: Journal Original Language: English
Document Type: Article Number of pages: 04
© Copyright 2014, All rights reserved.

Quick Chemistry by Microwave
Dr. PallabGayen, Dr. Ashutosh Pal
Abstract       pdf Full text PDF
Index: 10.183x/C0708011619 aned
Microwave chemistry is the science of applying microwave radiation to chemical reactions for quick synthesis and better yield.1,2,3 Microwaves act as high frequency electric fields and will generally heat any material containing mobile electric charges, such as polar molecules in a solvent or conducting ions in a solid. Polar solvents are heated as their component molecules are forced to rotate with the field and lose energy in collisions. Semiconducting and conducting samples heat when ions or electrons within them form an electric current and energy is lost due to the electrical resistance of the material. Microwave heating in the laboratory began to gain wide acceptance following papers in 19864although the use of microwave heating in chemical modification can be traced back to the 1950s. Although occasionally known by such acronyms as MAOS (Microwave-Assisted Organic Synthesis)5MEC (Microwave-Enhanced Chemistry) or MORE synthesis (Microwave-organic Reaction Enhancement), these acronyms have had little acceptance............
Author Keywords:- Quick chemistry, microwave chemistry.
e-ISSN: 2319-183X, p-ISSN: 2319-1821 Source Type: Journal Original Language: English
Document Type: Article Number of pages: 04
© Copyright 2014, All rights reserved.