Staff Publications: Recent submissions
Now showing items 921-940 of 958
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Defect-induced room temperature ferromagnetic properties of the Al-doped and undoped ZnO rod-like nanostructure
(Elsevier, 2017)In this work, electron paramagnetic resonance (EPR) experiment on undoped ZnO and Al doped ZnO (AZO) nanoparticles prepared by facile sol–gel method were investigated. The effects of the Al concentration on room temperature ... -
Optical properties of ZnO nanoparticles synthesized by varying the sodium hydroxide to zinc acetate molar ratios using a Sol-Gel process.
(Springer, 2016)Material property dependence on the OH−/Zn2+ molar ratio of the precursor was investigated by varying the amount of NaOH during synthesis of ZnO. It was necessary to control the water content and temperature of the mixture ... -
The influence of oxygen partial pressure on material properties of Eu3+-doped Y2O2S thin film deposited by Pulsed Laser Deposition.
(Elsevier B.V., 2015)Eu3+-doping has been of interest to improve the luminescent characteristics of thin-film phosphors. Y2O2S:Eu3+ films have been grown on Si (100) substrates by using a Pulsed Laser Deposition technique.The thin films grown ... -
Temperature dependence of structural and luminescence properties of Eu3+-doped Y2O3 red-emitting phosphor thin films by pulsed laser deposition.
(Springer, 2016-02)Pulse laser deposition was used to obtain nanocrystalline red-emitting Y2O3:Eu3+ thin-film phosphors.X-ray diffraction measurements show that the un-annealed thin film was amorphous, while those annealed were crystalline.At ... -
Synthesis and characterization of Y2O3:Eu3+ phosphors using the Sol-Combustion method.
(Elsevier B.V., 2014)Y2O3: Eu3+ phosphor powders were prepared by the Sol-Combustion synthesis method using a sulfur-contained organic fuel in an ethanol–aqueous solution. The structural, morphological and optical properties of the as-prepared ... -
The influence of different species of gases on the luminescent and structural properties of pulsed laser-ablated Y2O2S:Eu3+ thin films.
(Springer., 2016-04)Y2O2S:Eu3+ films have been grown on Si (100) substrates by using a pulsed laser deposition technique. The thin films grown under vacuum, argon and oxygen ambient have been characterized using structural and luminescent ... -
Wide visible emission and narrowing band gap in Cd-doped ZnO nanopowders synthesized via sol-gel route.
(Elsevier Ltd., 2016)Cd doped ZnO nanopowder (Zn1−XCdXO, 0.15≤ X ≤0.45) has been synthesized by facile sol-gel method. The X-ray diffraction (XRD) shows the powder possess polycrystalline with hexagonal wurtzite structure of ZnO without formation ... -
Narrow Visible Emission And Narrowing Band Gap In Ho3+ -Co Doped Y2O3: Eu3+ Nanopowders Prepared Via Sol- Combustion Route.
(IOSR Journal of Applied Physics, 2017-12)Nanocrystalline Eu3+, Ho3+co-doped Y2O3 powders with a maximum size of 9.8 nm were prepared by the sol-combustion process, using Y (NO3).6HO2 as an oxidizer, europium and holonium nitrates as activators, thiourea as a fuel ... -
Effect of Mn doping on the structural and optical properties of sol-gel derived ZnO nanoparticles.
(Springer, 2011)Un-doped and Mn-doped ZnO nanoparticles were successfully synthesized in an ethanolic solution by using a sol-gel method. Material properties of the samples dependence on preparation conditions and Mn concentrations were ... -
Faculty management practices of digital grey literature in an open access context
(Moi University, 2017)Digital grey literature is an important output that deserves management by libraries. The tools for achieving this frequently relinquish this task to the creators of the works with general poor results. The aim of this ... -
Managing digital academic grey literature using D-Space at Strathmore University Library.
(Moi University, 2012)ABSTRACT The aim of this study was to implement a system for the management of digital academic grey literature using D-Space software at Strathmore University. The specific objectives were to conduct a user needs ... -
Marketing library services to the rural population in Africa.
(Moi University, 2011)ABSTRACT Purpose This paper discusses the strategies a librarian needs to use to market his/her library or information services in rural areas in Africa. Approach The discussion is based entirely on the authors’ ... -
Contribution of ineffective teaching and learning of Mathematics to regional Disparities in socio economic development in African region
(International Journal of Academic Research in Education and Review, 2014)Causes of diversified mathematics curriculum changes in U.S.A, Europe and Russia have basically been technological driven compared to other regions. Yet , mathematics has consistently remained a ... -
Application of The K - Means Clustering Algorithm In Medic al Claims Fraud / Abuse Detection
(International Journal of Application or Innovation in Engineering & Management, 2014)This paper is about a system which applies a modified K - Means algorithm[12] to flag out suspicious claims for further scrutiny has been developed. The Java programming Language and my SQL database tools were used. ... -
Effects of Business Training Needs Analysis on Competencies of Trainees: The Kenyan Experience
(Journal of Humanities and Social Science, 2015)Human resource development practitioners have employed systematic training cycle approach to build competencies of the business trainees cover the years . In this approach training needs analysis forms ... -
Effect of Selected Metal Ions on the Mycelial Growth of Sclerotinia Sclerotiorum Isolated From Soybean Field in Rongai, Kenya
(International Journal of Chemistry and Materials Research, 2014)White mold caused by Sclerotinia sclerotiorum attacks a wide host range of broad-leafed plants which includes soybeans. The effect of twelve metal ions (Hg+2, Co+3, Ag+1, La+3, Cd+2, Cr+3, Cu+2, Zn+2, Mo+5, Sr+2, Sn+4 and ... -
Syntheses and structural characterization of 2,4,6-trimethylaniline complexes of iron carbonyls
(Inorganica Chimica Acta, 2014)The new 2,4,6-trimethylaniline complexes [Cp∗Fe(CO)2(NH2C6H2(CH3)3)]+ (3) and [CpFe(CO)2(NH2C6H2(CH3)3)]+ (4) (Cp∗ = η5-C5(CH3)5; Cp = η5-C5H5) have been synthesized and isolated in high yields as tetrafluoroborate salts. ... -
Low Cost Micropropagation of Local Varieties of Taro
(British Biotechnology Journal, 2015)Aims: This study was conducted to evaluate low cost protocol for the micropropagation of three varieties of taro (Dasheen, Eddoe and wild) from eastern Kenya. Study Design: The plants were grown in polythene bags arranged ... -
Survey of Cyber Security Frameworks
(International Journal of Technology in Computer Science & Engineering, 2014)In a digital world, the national economy and welfare have grown critically dependent on the cyber infrastructure due to the capabilities and opportunities the Internet provides. This ... -
An Investigation into the Applicability of Green IT Concepts Into Green IS
(International Journal of Application or Innovation in Engineering & Management, 2014)In the last five years, research on the role of IT in managing the environment has been accelerated by Information Technology (IT) practitioners such as Google, IBM and Microsoft as well as by the academic ...