RP-Department of Physics: Recent submissions
Voici les éléments 1-20 de 102
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Design and Implementation of a Secure Mobile Phone-Based Route Navigator (Mguide), Adapted for the Visually Challenged People
(Springer Link, 2023)This paper is focused on the development of a turn-by-turn voice navigation mobile application “mGuide” adapted for visually challenged people (VCP). The application was developed in response to the challenges of outdoor ... -
Distorted Wave Born and Optical Potential Calculation Methods for Electron-Sodium Elastic Scattering Cross-Section at Intermediate Energies
(Kenyatta University, 2015)The first order distorted wave Born approximation (DWBA) and the optical potential (OP) method are systematically compared in the calculation of differential cross sections and integral cross sections in the elastic ... -
Effect of Deposition Parameters on Optical and Electrical Properties of Sno2: Al Thin Films Prepared By Spray Pyrolysis Technique for Optoelectronic Devices
(Natural Sciences Publishing company, 2018)Transparent Aluminum doped tin oxide (SnO2:Al) thin films with different Al percentage (1.96%, 3.85%, 5.66%, 7.41% and 9.09%) were fabricated using a low cost spray pyrolysis technique at optimized deposition parameters. ... -
Positron impact elastic scattering by calcium atom using first order distorted wave born approximation with a complex potential
(Kenyatta University, 2022-06)Precise positron scattering cross section data are essential for the development of a wide range of technological fields such as astrophysics, plasma sciences, material sciences and bio-medicine. Thus, lack of complete ... -
Effects of zinc oxide nanostructures on performance of natural dye sensitized solar cells
(Kenyatta University, 2022-06)Dye Sensitized Solar Cell (DSSC) is a very promising development in photovoltaic technology. In DSSCs, dye molecules provide the charges, while a semiconductor collects and transports the charge. The performance of DSSCs ... -
Opto-Electrical Properties of Chemical Bath Deposited Cu4SnS4 Thin Films
(International Journal of Thin Film Science and Technology, 2021): Thin films could be explained as a very thin layer of a substance deposited onto various substrates. Nowadays, a variety of binary, ternary, quaternary and pent nary films have been produced by using different deposition ... -
Optical Characterization of Photocatalytic Copper Doped Thin Films of Anodized Titanium
(IOP Publishing, 2020)Titanium oxide is used in a myriad of applications such as in capacitors, insulation paints among others. It is a prime candidate for water splitting due to its photocatalytic properties. In this work, undoped TiO2 thin ... -
Cancer and Non-Cancer Health Risks from Carcinogenic Heavy Metal Exposures in Underground Water from Kilimambogo, Kenya
(Elsevier, 2020)Water is very crucial for man, animals and plants because of its health implications in case it is polluted. Water has many uses like drinking for man and animals, domestic use and for agricultural use. The concentration ... -
Environmental Assessment of Heavy Metal Pollutants in Soils and Water from Ortum, Kenya
(Springer, 2020)Analysis of elemental concentration in soil and water was carried out in Ortum to ensure safe utilization of soil and water resources for agriculture, industrial, and household purposes. Elemental analysis of soil and water ... -
Excitation of the Lowest Autoionizing Level of Caesium Atoms by Positron Impact
(African Journal of Pure & Applied science (AJPAS), 2021)We have obtained differential and integral cross sections for the excitation of caesium atom to the lowest autoionizing level by positron impact using the distorted wave approximation. We have also done calculations for ... -
Measurement of Radon Activity Concentration in Underground Water of Bureti Sub-County of Kericho County Kenya
(Oxford Academic, 2020)The activity concentration of radon in underground water of Bureti sub-county was measured using liquid scintillating counter device. The average radon activity concentration in all the water samples was 12.41 Bql−1. The ... -
Influence of Localized Surface Plasmon Polaritons on Silver Nanoparticles
(ABC Journal of Advanced Research, 2020)In this article, we present a theoretical study on localized surface Plasmon of spherical Ag nanoparticles (NPs) done by numerical simulation. A plane EM wave was used to determine absorption cross-section and results ... -
Assessment of Levels of Natural Radioactivity in Sand Samples Collected from Ekalakala in Machakos County, Kenya
(Hindawi, 2020)Construction sand is naturally polluted with radionuclides of terrestrial origin. In this study, specific activities of 238U, 232+, and 40K in 30 sand samples collected along the Ekalakala River, Machakos County, Kenya, ... -
Design and Fabrication of an Electric Power Generator Prototype: The Road as a Source of Clean Energy
(Seventh Sense Research Group, 2018)The demand for energy has greatly increased. The current sources of clean energy are not able to supply enough amount of energy. Consequently, Fossil fuels are still highly used in many countries. These are harmful to the ... -
Relationship Between Band Gap and Particle Size of Cadmium Sulfide Quantum Dots
(Chemistry Research Journal, 2017)Nanoparticles at quantum dot level are considered to be larger than individual atoms and molecules but smaller than their bulk solid. In such a condition, they are believed to obey neither absolute quantum chemistry nor ... -
Effect of Substrate Temperature on the Optical Properties of SnxSey/ZnO:Al P-N Junction Solar Cell
(Scientific & Academic Publishing, 2017)Zinc Oxide was doped with various percentages of Aluminum ranging from 0% to 10% by mass. Tin (Sn) and selenium (Se) metal samples were mixed in different ratios of increasing selenium. Deposition of both SnSe and ZnO:Al ... -
Electrical Analysis of Bis (2-Amino-4-Methylpyridinium) Tetrachloridozincate Compound Grown by Chemical Bath Deposition at Ambient Temperature and Pressure Conditions
(2015)In this paper, a study was carried out and we now report the measurement of impedance spectroscopy for the bis(2-amino- 4-methylpyridinium) tetrachloridozincate (II) compound in the frequency range 209 Hz-5 MHz with the ... -
Electrical Behavior of Cd0.3Zn1.1x S0.7 Thin Films for Non-Heat Light Emitting Diodes
(Publishing Center Dialog, 2017)In developing countries like Kenya, solution processing technique is the cheapest and simplest technique to grow inorganic composites thin films. This method was used to grow thin films of Cd0.3Zn1.1xS0.7 on ordinary ... -
Scientific Research Through Simulation in Africa: Role of HPC in Computational Material Studies
(Science Publishing Group, 2017)Africa is not investing much in computational materials research. Poor infrastructure in terms of electricity and internet connectivity has made research difficult for computational researchers. High Performing Computers ... -
Impact of Annealing Thin Films In(OH)xSy Growth By Solution Technique
(Publishing Center Dialog, 2017)Indium Hydroxy Sulphide has demonstrated abundance in resources, low prices, nontoxic characteristics, radiation resistance, high temperature resistance, and chemical stability, and therefore it has become an extremely ...
