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The Inter-play of the Opto-Electrical Properties of Cuprite and Tenorite Semiconductors for Solar Cell Application
Agumba Onyango John,
Adem Abibo Jack
Issue:
Volume 5, Issue 6, December 2017
Pages:
81-86
Received:
12 October 2017
Accepted:
23 October 2017
Published:
7 December 2017
Abstract: The electrical and optical properties of cuprous oxide (Cu2O) thin films prepared by D.C. reactive magnetron sputtering technique have been systematically studied. The influence of the film deposition conditions on the opto-electrical properties has been investigated and has helped to solve the puzzles of difficulties associated with preparation of high quality Cu2O films. This is because there is usually co-deposition of phases of Cu, Cu2O and CuO during the preparation of Cu2O films. From this study, the films deposited at low substrate temperature were found to be less crystalline as compared to those deposited at high substrate temperature. This was corroborated by the drop in the sheet resistivity from ~55.08Ω cm to ~29.66Ω cm and the band gap from ~2.36eV to ~1.63eV for films prepared at substrate temperatures of 23°C and 170°C respectively. Annealing was also found to improve the film crystallinity.
Abstract: The electrical and optical properties of cuprous oxide (Cu2O) thin films prepared by D.C. reactive magnetron sputtering technique have been systematically studied. The influence of the film deposition conditions on the opto-electrical properties has been investigated and has helped to solve the puzzles of difficulties associated with preparation of...
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Effect of the Nozzle-Substrate Distance on the Structural and Optical Properties of ZnO Thin Films Deposited by Spray Pyrolysis Technique
Abdelkader Hafdallah,
Abderrahman Azzedine,
Hanane Belhani,
Mohamed Salah Aida,
Nadhir Attaf
Issue:
Volume 5, Issue 6, December 2017
Pages:
87-90
Received:
18 October 2017
Accepted:
6 November 2017
Published:
18 December 2017
Abstract: In the present work, zinc oxide (ZnO) thin films were deposited by pyrolysis spray technique on glass substrate temperature 350°C, using the zinc acetate with a molarity of 0.1M. Our interest is on the investigation of the nozzle-substrate distance on the structural and optical properties of the films. Structural analysis by X-ray diffraction showed that the deposited films have a preferred orientation along the direction (002) and are relatively uniform. The spectrophotometer UV-Visible confirms that it is possible to get good transparent ZnO films with a transmission of 80 to 95% in the visible. The values of optical gaps Eg deduced from the spectra of UV-Visible transmissions vary between 3.21 and 3.25 eV.
Abstract: In the present work, zinc oxide (ZnO) thin films were deposited by pyrolysis spray technique on glass substrate temperature 350°C, using the zinc acetate with a molarity of 0.1M. Our interest is on the investigation of the nozzle-substrate distance on the structural and optical properties of the films. Structural analysis by X-ray diffraction showe...
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Hypothetical Formulation to Propel Pico-molecular Medicinal Dust: Application to Total Elevation of Therapeutic Efficiency Compare to Nano Entity
Rakesh Das,
Subhendu Chatterjee
Issue:
Volume 5, Issue 6, December 2017
Pages:
91-101
Received:
15 October 2017
Accepted:
25 October 2017
Published:
22 December 2017
Abstract: Ongoing through all the applications of nano medicines through various sources, it has been understand that preparation of polymeric nanoparticle, liposomes, Dendrimers, Solid Lipid Nanoparticle (SLN) and polymeric micelles is useful for Drug delivery system. Also, helpful to repairs the DNA and treatment of many diseases by increase rate of toxin elimination. The nano medicines in various way initiate the proper biotransformation in livers and also give rise to effective pharmacodynamics profiles. It has been discovered that many nano molecules can be converted into picomolecular medicinal dust (pMMD) entities on lowering the molecular weight, reducing the bond length and shortening the molecular length. This (pMMD) is basically useful in respiratory system treatment, Skin targeted penetration and ophthalmic disorders ramification to ensure hypothetical probability to facilitate Pico-molecular dust involvement as medicinal propeller. Because, it acquires the finest position to receptors less than nano receptors, nano enzymes, nano amino acids chain/polymers, nano pores, nano-microelements, DNA and other nano bio-molecules etc., where nano molecular modules are not effectives. The pico dust will acquires its position into the more specified pico-receptors where nano molecules cannot penetrate or lodge. Pico medicine spray could be implicated superficially over the skin surface at high pressure. So, that it get penetrate upto the subcutaneous and intradermal skin layers with 100% inoculation easily. In ophthalmic preparation, the pico-molecular drugs spray will help to open the drainage area stimulating the receptor on the iris edge corner for dilation of path openings and constriction of circular muscles of eye to create pressure for fluid ejaculation.
Abstract: Ongoing through all the applications of nano medicines through various sources, it has been understand that preparation of polymeric nanoparticle, liposomes, Dendrimers, Solid Lipid Nanoparticle (SLN) and polymeric micelles is useful for Drug delivery system. Also, helpful to repairs the DNA and treatment of many diseases by increase rate of toxin ...
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Investigation of the Flow Characteristics of Titanium - Oxide - Water Nanofluid in Microchannel with Circular Cross Section
Saleh Etaig,
Reaz Hasan,
Noel Perera
Issue:
Volume 5, Issue 6, December 2017
Pages:
102-109
Received:
18 October 2017
Accepted:
31 October 2017
Published:
22 December 2017
Abstract: The presented paper reports the analysis of the flows characteristic of TiO2-water nanofluid flowing inside a horizontal microchannel with circular cross section area. The flow is investigated by CFD techniques using a finite volume method. A recently introduced viscosity correlation was used to model the effective viscosity of the nanofluid. A range of Re number is tested in the present study. Various temperature ranges were used as constant temperature boundary conditions. The increase of the nanoparticle volume fraction was found to increase the heat transfer rate; water showed less enhancement in heat transfer compared to the nanofluid. The increase in Re number promoted Nu number. The effect of the temperature on the effective viscosity in the channel was also reported. The change of the velocity in the entrance region was studied and discussed. The velocity gradient in the microchannel is calculated, and the results are shown and discussed.
Abstract: The presented paper reports the analysis of the flows characteristic of TiO2-water nanofluid flowing inside a horizontal microchannel with circular cross section area. The flow is investigated by CFD techniques using a finite volume method. A recently introduced viscosity correlation was used to model the effective viscosity of the nanofluid. A ran...
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Synthesis, Characterization and Antifungal Activity of Manganese (II) Complex with Schiff Base Derived from Acetylacetone and Leucine
Aishatu Salihu Mohammed,
Fatima Abubakar,
Abigail Ebi Aye
Issue:
Volume 5, Issue 6, December 2017
Pages:
110-113
Received:
20 October 2017
Accepted:
3 November 2017
Published:
22 December 2017
Abstract: This study was aimed at synthesizing, characterizing and evaluating the antifungal activity of the Schiff base and Mn (II) complex. The reaction of the mixture of ethanol solution of acetylacetone and leucine yielded a Schiff base. The interaction between the Schiff base in hot aqueous methanol mixture and manganese (II) chloride in ethanol gave the manganese (II) Schiff base complex. The complex was characterized by decomposition/melting point temperatures, solubility test, IR spectrophotometry, colour determination, dissociation constant of Schiff base and antifungal activity. The Schiff base obtained has yellow colour, with a melting point of 250°C and percentage yield of 54.67% while the manganese (II) complex obtained had a pink colour with decomposition temperature of 167°C and percentage yield of 76.40%. The Schiff base and the complex was soluble in some solvents but slightly soluble in others. The Infrared spectra of the Schiff base showed a band at a range of 1600cm-1 - 1622cm-1 attributed to v (C=N) stretching frequencies establishing it being a Schiff base. Similar bands were observed in the spectra of Manganese (II) Schiff base complex but in lower frequencies indicating that the Schiff base has coordinated to the Mn ion. The antifungal activity of manganese (II) complex showed significant activity on the fungal isolates Candida albican and Sacchromyces cerevisiae. The study concludes that Schiff base synthesized was a weak acid and the Schiff base was not an active drug against the fungal pathogens used but Mn (II) complex was active against the pathogens used.
Abstract: This study was aimed at synthesizing, characterizing and evaluating the antifungal activity of the Schiff base and Mn (II) complex. The reaction of the mixture of ethanol solution of acetylacetone and leucine yielded a Schiff base. The interaction between the Schiff base in hot aqueous methanol mixture and manganese (II) chloride in ethanol gave th...
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