Dr. STEPHEN NZIOKI MAILU

B.Ed. (Sci.) (KU), MSc. (UWC), Ph.D (UWC)

Office of the Registrar (Academic and Student Affairs)

Machakos University,

P.O Box 136 – 90100,

Machakos, Kenya

Cell No: +254 719 765 804

Email: smnzioki2007@gmail.com; smailu@mksu.ac.ke

Research interests: My research focuses on synthesis, characterization and application of nanoalloys (nanomaterials) and nanoalloys/polymer composites in sensing (nanosensors), electrocatalysis and fuel cells; Pollutants and Heavy metal Analysis in Plants, Soil and Water Samples.

EDUCATION:

• PhD in Chemistry (Electroanalytical Chemistry) (2013) from University of the Western Cape (UWC), South Africa
• MSc. in Chemistry (Electroanalytical Chemistry) (Cum Laude) (2011) from University of the Western Cape, South Africa
• B.Ed. (Sci.), Mathematics and Chemistry (Chemistry Major) (First Class Honours) (2007) from Kenyatta University, Kenya

PUBLICATIONS:

• Stephen N. Mailu, Simultaneous detection of Anthracene and Phenanthrene on Ag-Au alloynanoparticles/overoxidized-polypyrrole composite modified carbon electrode, IOSR Journal of Applied Chemistry, 2019, 12, 65-80
• Kaptum Stephen, Stephen N. Mailu and Peter Koech, Relationship Between Teaching Methods and Student Performance in Physics in Public Secondary Schools in Nakuru East Sub-County, International Journal of Recent Innovations in Academic Research, 2019, 3, 220-227
• Joel Silla, David Mulwa and Stephen N. Mailu, Relationship Between Teaching Method and Students’ Performance in Mathematics in Public Secondary Schools in Dadaab Sub County, Garissa County; Kenya, IOSR Journal of Research & Method in Education, 2018, 8, 28-32
• Kaptum C. Stephen, Stephen N. Mailu and Peter K. Koech, Relationship between Learning Strategies and Student Performance in Physics in Public Secondary Schools in Nakuru East Sub-County, European Journal of Social Sciences Studies, 2018, 3, 237-248
• Kaptum C. Stephen, Peter K. Koech and Stephen N. Mailu, Relationship between Self-Regulated Learning and Student Performance in Physics in Public Secondary Schools in Nakuru East Sub-County, IOSR Journal of Research & Method in Education, 2018, 8, 79-83.
• Stephen N. Mailu, Masikini Milua, Priscilla G. Baker and Emmanuel I. Iwuoha. Highly Sensitive Hydrazine Electrochemical Sensor Based on Pt(100)Rh Nanoalloys Modified Glassy Carbon Electrode, International Journal of Electrochemical Science, 2017, 12, 01-19
• Milua Masikini, Stephen N. Mailu, Abebaw Tsegaye, Njagi Njomo, Kerileng M. Molapo, Chinwe O. Ikpo, Candice Rassie, Lindsay Wilson, Priscilla G. L. Baker and Emmanuel I. Iwuoha, A Fumonisins Immunosensor Based on Polyanilino-Carbon Nanotubes Doped with Palladium Telluride Quantum Dots, Sensors, 2015, 15, 529-546.
• T. Sone, S.N. Mailu, T. Malwela, E. Coetsee, H.C. Swart, E.I. Iwuoha and M. Maaza, Electrochromism in Self-Assembled Porous Thin Films of Hexagonal Tungsten Trioxide Microspheres Prepared by Aqueous Chemical Growth, International Journal of Electrochemical Science, 2014, 9, 2867-2881
• Milua Masikini, Stephen N. Mailu, Chinwe O. Ikpo, NJagi Njomo, Tesfaye T. Waryo, Priscilla G. L. Baker and Emmanuel I. Iwuoha, In – situ Electrochemical Synthesis, Microscopic and Spectroscopic Characterisations of Electroactive poly(2,5-dimethoxyaniline) – Multi-Walled Carbon Nanotubes Composite Films in Neutral Media, International Journal of Electrochemical Science, 9, 2014, 7003 – 7020.
• Natasha Ross, Emmanuel I. Iwuoha, Priscilla Baker, Njagi Njomo, Stephen N. Mailu, Milua Masikini, Nolubabalo Matinise, Abebaw Tsegaye, Noluthando Mayedwa, Tesfaye Waryo, Kenneth I. Ozoemena, Avril Williams, Amplification of the discharge current density of Lithium-ion batteries with spinel phase Li(PtAu)₀₂ Mn_1.98O₄ nanomaterials, Electrochimica Acta, 2014, 128, 178-183.
• Njagi Njomo, Tesfaye Waryo, Milua Masikini, Chinwe O Ikpo, Stephen N. Mailu, Oluwakemi Tovide, Natasha Ross, Avril Williams, Christopher E. Sunday, Priscilla G.L Baker, Kenneth I. Ozoemena, Emmanuel I. Iwuoha, Graphenated tathalum (IV) oxide and poly(4-styrene sulphonic acid) doped polyaniline nanocomposite as cathode material in material in an electrochemical capacitor, Electrochimica Acta, 2014, 128, 226-237.
• Kerileng M. Molapo, Peter M. Ndangili, Rachel F. Ajayi, Gcineka Mbambisa, Stephen N. Mailu, Njagi Njomo, Milua Masikini, Priscilla Baker and Emmanuel I. Iwuoha, Electronics of Conjugated Polymers (I): Polyaniline, International Journal of Electrochemical Science, 2012, 7, 11859 – 11875.
• Abd A. Baleg, Nazeem M. Jahed, Omotayo A. Arotiba, Stephen N. Mailu, Nicolette R. Hendricks, Priscilla G. Baker and Emmanuel I. Iwuoha, Synthesis and Characterization of Poly(propylene imine) Dendrimer – Polypyrrole Conducting Star Copolymer. Journal of Electroanalytical Chemistry, 2011, 652, 18-20.
• Peter M. Ndangili, Rasaq A. Olowu, Stephen N. Mailu, Fanelwa R. Ngece, Priscilla G.L. Baker, Emmanuel I. Iwuoha, Impedimetric Response of a Label-Free Genosensor Prepared on a 3-Mercaptopropionic Acid Capped Gallium Selenide Nanocrystal Modified Gold Electrode. International Journal of Electrochemical Science, 2011, 6, 1438 – 1453.
• Faiza J. Iftikhar, Priscilla G.L. Baker, Peter M. Ndangili, Stephen N. Mailu, Emmanuel I. Iwuoha, Modulation of the interfacial electrochemistry of surfactant-functionalised polypyrrole chemical sensor systems. Electrochemical Acta, 2011, 56 (14), 5214-5221.
• Rachel F. Ngece, Natasha West, Peter M. Ndangili, , Rasaq A Olowu, Avril Williams, Nicolette Hendricks, Stephen Mailu, Priscilla Baker, Emmanuel Iwuoha, A silver Nanoparticle/Poly (8-Anilino-1-Naphthalene Sulphonic Acid) Bioelectrochemical Biosensor System for the Analytical Determination of Ethambutol. International Journal of Electrochemical Science, 2011, 6, 1820 – 1834.
• Rasaq A Olowu, Avril Williams, Peter M. Ndangili, Rachel F Ngece, Stephen N Mailu, Priscilla Baker, Emmanuel Iwuoha, Impedimetry and microscopy of electrosynthetic poly(propylene thiophenoimine)-co-poly(3,4 ethylene dioxythiophene) dendritic star copolymer, International Journal of Electrochemical Science, 2011, 6, 1855 – 1870.
• Stephen N. Mailu, Tesfaye Waryo, Peter M. Ndangili, Fanelwa R. Ngece, Abd A. Baleg, Priscilla G. Baker, Emmanuel I. Iwuoha, Determination of Anthracene on Ag-Au Alloy Nanoparticles/Overoxidized-Polypyrrole Composite Modified Glassy Carbon Electrodes, Sensors, 2010, 10, 9449-9465.
• Rasaq A. Olowu, Omotayo Arotiba, Stephen N. Mailu, Tesfaye T. Waryo, Priscilla Baker, Emmanuel Iwuoha, Electrochemical Aptasensor for Endocrine Disrupting 17β-Estradiol Based on a Poly(3,4-ethylenedioxylthiopene)-Gold Nanocomposite Platform, Sensors, 2010, 10, 9872-9890
• Rachel Ngece, Nicolette Hendricks, Natasha West, Peter M. Ndangili, Abongile Jijana, Stephen Mailu, Tesfaye Waryo, Priscilla Baker, Emmanuel Iwuoha. A silver nanoparticles-poly (8-anilino-1-naphthalene sulphonic acid) bioelectrochemical sensor system for the analytical determination of ethambutol, In V. Rajendra, B. Hillbrands, P. Prabu and K.E. Geckeler (eds.): Biomedical Applications of Nanostructured Materials, Macmillan Publishers India Limited, 2010, Pages 269-274. (Book Chapter)

CONFERENCE PRESENTATIONS:

• Stephen N. Mailu, Simultaneous Determination of Anthracene and Phenanthrene in Water Based on Nanoalloys, ‘International Conference on Science, Technology and Innovation for Sustainable Development in Dryland Environments’ SEKU-UMMA; 19th-23^rd November, 2018
• Stephen N. Mailu, Nanoalloys for Pollutants Detection, The 5^th Humboldt Conference at Sportsman’s Arms Hotel, Nanyuki – Kenya, 19^th – 21^st June, 2018.
• Stephen N. Mailu, Priscilla G.L Baker, Emmanuel I. Iwuoha, Electrochemical Determination of Hydrazine in Waste Water, Machakos University 1^st Annual International Conference, Machakos University, 17^th – 19^th April, 2018.
• Stephen N. Mailu, Priscilla G.L Baker, Emmanuel I. Iwuoha, Determination of Highly Carcinogenic Polyaromatic Hydrocarbons in Water Based on Nanoalloys, The 10^th Symposium of the African Network for Chemical Analysis of Pesticides and Other Pollutants (ANCAP), at Reef Hotel, Mombasa, 2^nd – 4^th December, 2017.
• Stephen N. Mailu, Priscilla G.L Baker, Emmanuel I. Iwuoha, Pt(100)-Based Nanoalloys for Pollutants Detection 7^th International SEANAC –Africa Conference, at Reef Hotel, Mombasa, 28^th Nov.- 1^st Dec., 2017.
• Stephen N. Mailu, Priscilla G. Baker and Emmanuel I. Iwuoha, Determination of Anthracene Based on Nanoalloys – Polymer Composites, 2^nd Interdisciplinary International Scientific Conference at Kibabii University,  14^th – 15^th June, 2017.

• Stephen N. Mailu, Priscilla G. Baker and Emmanuel I. Iwuoha, Hydrazine Electrochemical Sensor Based on Pt(100)Rh Nanoalloys, the Kenya Chemical Society 9^th International Conference at USIU – Africa, Kenya, 9^th – 12^th May, 2017.
• Stephen N. Mailu, Priscilla G. Baker and Emmanuel I. Iwuoha, Determination of Water Pollutants Based on Nanoalloys, University of Kabianga’s 1^st International Conference at Kericho Tea Hotel, Kericho, Kenya, 26^th – 28^th October, 2016.
• Stephen N. Mailu, Priscilla G. Baker and Emmanuel I. Iwuoha, Development of Preferentially Oriented Pt(100) nanoalloy Electrocatalysts for the Next Generation Fuel Cells, Faculty of Science Postgraduate Research Open Day, University of the Western Cape (UWC), South Africa, 30^st October, (Won a price as the 2^rd best oral presenter – Doctoral category)
• Stephen N. Mailu, Priscilla G. Baker and Emmanuel I. Iwuoha, Facile Synthesis and Characterization of Novel Pd-Au-Ag Nanoclusters and their Application as Electro-catalysts for Ammonia Oxidation, 63^rd Annual Meeting of the International Society of Electrochemistry (ISE), Prague, Czech Republic, 19-24^th August,
• Stephen N. Mailu, Priscilla G. Baker and Emmanuel I. Iwuoha, Synthesis, Characterization and Application of Novel (100) Preferentially Oriented Platinum Nanoalloys for Direct Ammonia Fuel Cells, 2^rd International symposium on Electrochemistry, Electrochemistry for energy, African Routes Conference Centre, University of the Western Cape (UWC), South Africa; 19-20^th July,
• Stephen N. Mailu, Priscilla G. Baker and Emmanuel I. Iwuoha, Reactivities of novel ultrasensitive symmetrical Pt(100) nanoalloy systems in ammonia oxidation, Faculty of Science Postgraduate Research Open Day, University of the Western Cape (UWC), South Africa, 31^st October,
• Stephen N. Mailu, Priscilla G. Baker and Emmanuel I. Iwuoha, Production of Hydrogen in Alkaline Media Via Ammonia Electrolysis, Young SACI Symposium, University of the Western Cape (UWC), South Africa, 24^th -25^th November,
• Stephen N. Mailu, Priscilla Baker, Emmanuel Iwuoha, Amperometric detection of anthracene based on bimetallic nanoparticles/nanostructured overoxidized-polypyrrole composite, Stellenbosch University, South Africa, International conference on Analytical Sciences (Analytica 2010), 5^th-9^th 2010.
• Stephen N. Mailu, Priscilla Baker, Emmanuel Iwuoha, Simultaneous amperometric detection of anthracene and phenathrene base on Ag-Au nanoalloy/polypyrrole composite, Young SACI Symposium, University of Cape Town (UCT), South Africa, 25^th 2010.
• Stephen N. Mailu, Priscilla Baker, Emmanuel Iwuoha, Electrochemical Sensor for Anthracene based on Ag-Au alloy nanoparticles/overoxidized-polypyrrole composite, 10^th International symposium on ‘Kinetics in Analytical Chemistry’ Fountains Hotel, Cape Town, South Africa. 2^nd-4^th 2009. (Won a price as the 3^rd best poster presenter)

WORKSHOPS ATTENDED:

• The 170^th 5 Day Corporate Governance Training Course held at Sarova WhiteSands Hotel, Mombasa, Kenya, 21^st – 25^th May, 2018
• Chemical Security training for University and College Staff within Machakos County, Machakos University Hotel, Koma Hall, Machakos, 18^th – 20^th July,
• Experts Workshop on Sustainable Use of Water Resources, Maseno University, Kisumu – Kenya; a plenary speaker on Determination of Highly Carcinogenic Polyaromatic Hydrocarbons and Hydrazine in Water Based on Nanoalloys as a plenary speaker, 4^th – 7^th July, 2016
• Research, Innovation and Technology at Machakos University Hotel and Conference Centre, Machakos, 15^th – 16^th September, 2016
• Electrochemsa Workshop IV: International workshop on electrochemical microscopy and spectroscopy, Nelson Mandela Metropolitan University – Port Elisabeth, South Africa; Organized by ElectrochemSA and South African Chemical Institute (SACI), 21^st-22^nd 2011.
• South African Raman Workshop, University of Pretoria, South Africa, 27^th -28^th November, 2012.
• Course training on Fluorescence Microscopy at Stellenbosch University, South Africa, on 7^th July, 2011
• Course training on Chemical Safety Training at University of the Western Cape, South Africa, on 19^th November, 2009

FUNDED RESEARCH PROJECTS:

• May, 2018 – to date (on going): Machakos University Project on Soap and Detergents Production Award, Seed Money of Ksh. 250,000.
• Feb. 2018 –  (on going):  Machakos University Research Grant Award, Ksh. 450,000
• September, 2016: Seeding Labs Equipment Access 2016 Award USD 170,690.28

• 2014 – 2016: NRF Freestanding Post-Doctoral Fellowship Award, University of the Western Cape, South Africa (R585, 000; (KShs. 5.85 Million)
• 2011-2013: National Research Foundation (NRF) scholarship for PhD, University of the Western Cape, South Africa (R270, 000; (KShs. 2.7 Million)
• 2009 – 2010: National Research Foundation (NRF) scholarship for MSc, University of the Western Cape, South Africa (R120, 000; (KShs. 1.2 Million)

HONORS AND AWARDS:

• 3^rd best poster presentation award; 10^th International symposium on ‘Kinetics in Analytical Chemistry’ Fountains Hotel, Cape Town, South Africa. 2^nd-4^th Dec. 2009.
• 2rd best oral presentation award; Faculty of Science Postgraduate Research Open Day, University of the Western Cape (UWC), South Africa, 30^st October, 2013

MEMBERSHIP:

• 2016 – Present: – Kenya Chemical Society (KCS) – Member
• 2009 – Present: – South African Chemical Institute (SACI) – Member
• 2009 – Present: – International Society of Electrochemistry (ISE) – Member

 

ADMINISTRATION & WORK EXPERIENCE:

• Deputy Registrar (Academic and Student Affairs), Machakos University (August, 2018– to date)

• Dean, School of Pure and Applied Sciences, Machakos University (April, 2017 – to July, 2018)
• Chairman, Department of Physical Sciences, School of Pure and Applied Sciences, Machakos University (May, 2015 – March, 2017)
• Examinations/Timetabling Coordinator, Department of Physical Sciences, Machakos University (Jan. – April, 2015)
• Lecturer and Researcher, Physical / Analytical Chemistry, Machakos University (Jan. 2015- Up-to date)
• Lecturer and Researcher, Physical / Analytical Chemistry, Maseno University (Nov. 2013- Dec, 2014)
• Post – Doctoral Fellow, University of the Western Cape, South Africa (2014 – Months of April & August)

COMMUNITY & PROFFESSIONAL SERVICE:

• Board of Management (BOM) Chairman; Matiku Secondary School
• Board Member, Makueni County Sand Conservation and Utilization Authority
• Board of Management (BOM) Member; Kyemundu Secondary School

• Chemistry External Proposals Reviewer (2016-to date); National Research Fund – Kenya,
• External Proposals Reviewer (2016- to date); Kenyatta University Vice-Chancellor’s Research Grant

• External Examiner (2016 –to date); Remarking of examination scripts, Department of Chemistry, South Eastern Kenya University

TEACHING AREAS:

• Physical / Analytical / Environmental Chemistry, Nanochemistry and Electrochemistry

SUPERVISION OF POST GRADUATE STUDENTS AND THESIS EXAMINATION:

• Examined one (1) PhD thesis; supervised to completion one (1) PhD student & four (4) Masters Students; and currently supervising five (5) masters’ students.