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Arotiba Omotayo
Applied Chemistry
+27 (0) 11 559 6200
4203 John Orr Building
Prof Omotayo A Arotiba

Primary Expertise:
Secondary Expertise:
Analytical,  Photoelectrochemistry
NRF Rating:
Established researcher
Faculty of Science

UJ expert list: Physical Chemistry; Electrochemistry; Sensors
Electrochemistry, electrochemical biosensors, electrochemical sensors, electroanalytical chemistry, photoelectrochemistry


I teach physical chemistry across all the levels in the department

Research Interests
I am an electrochemist (Physical Chemistry) by training and my core research interest is the use of electrochemistry as a tool to solving problems/challenges in material, biomedical and environmental spheres. These include (but not limited to):

  • electrochemical biosensors and sensors based on dendrimer nanocomposites
  • photoelectrochemical reactors for water treatment
  • electro-synthesis and characterisation of novel materials/compounds in chemical research
  • nano-electrochemistry – synthesis and application of nanomaterial based electrodes

I am currently involved in the development of chemical sensors for selected organic and inorganic water pollutants, aptamer biosensor for HIV detection, cholera biosensor, smart polymer based enzyme biosensors, exfoliated graphite based photoelectrochemical reactors for the removal of organics from water (water treatment), onsite electrochemical sensor for arsenic. I mentor BTech, MSc and PhD students. I hold a National Research Foundation (NRF) research rating.

Professional Affiliation and Board Membership

  • Member, International Society of Electrochemistry (ISE)
  • Member, South Africa Chemical Institute (SACI)
  • Member Electrochem SA (Electrochemistry wing of SACI)
  • Affiliate member, International Union of Pure and Applied Chemistry (IUPAC)

Selected Publications

Arotiba, O.A.; Ignaszak, A.; Malgas, R.; Al-Ahmed, A.; Baker, P.G.L.; Mapolie, S.F.; Iwuoha, E.I. An electrochemical DNA biosensor developed on novel multinuclear nickel (II) salicylaldimine metallodendrimer platform. Electrochimica Acta 2007, 53, 1689.

Owino, J.H.O.; Arotiba, O.A.; Baker, P.G.L.; Guiseppi-Elie, A.; Iwuoha, E.I. Synthesis and characterization of poly (2-hydroxyethyl methacrylate)-polyaniline based hydrogel composites. Reactive and Functional Polymers 2008, 68, 1239.

Arotiba, O.A.; Owino, J.H.O.; Songa, E.A.; Hendricks, N.; Waryo, T.T.; Jahed, N.; Baker, P.G.L.; Iwuoha, E.A. An Electrochemical DNA Biosensor Developed on a Nanocomposite Platform of Gold and Poly(propyleneimine) Dendrimer. Sensors 2008, 8, 6791.

Songa, E.A.; Arotiba, O.A;  Joseph H.O. Owino, J.H.O;  Jahed, N; Baker, P.G.L; Iwuoha, E.I. Electrochemical detection of glyphosate herbicide using horseradish peroxidase immobilized on sulfonated polymer matrix. Bioelectrochemistry 2009, 75, 117.

Arotiba, O.A.; Songa, E.A.; Baker, P.G.L; Iwuoha, E.I. Dendrimeric gold-poly(propylene imine) dendrimer electrochemical DNA nanobiosensor. Chimica Oggi • Chemistry Today 2009, 27, 5.

Arotiba, O.A.; Owino, J.H.O.; Baker, P.G.L.; Iwuoha, E.I. Electrochemical impedimetry of electro-deposited poly(propylene imine) monolayer. J. Electroanal. Chem.  2010, 638, 287.

Ndangili, P.M.; Arotiba, O.A.; Baker, P.G.L.; Iwuoha, E.I. A Potential masking approach in the detection of dopamine on 3-mercaptopropionic acid capped ZnSe quantum dots modified gold electrode in the presence of interferences J. Electroanal. Chem. 2010, 643, 77.

Arotiba, O.A.; Baker, P.G.; Mamba, B.B.; Iwuoha, E. The Application of Electrodeposited Poly(Propylene imine) Dendrimer as an Immobilisation Layer in a Simple Electrochemical DNA Biosensor. Int. J. Electrochem. Sci. 2011, 6, 673.

Ndlovu, T.; Arotiba, O.A.; Sampath, S.; Krause, R.W.; Mamba, B.B. Electrochemical detection and removal of lead in water using Poly(propyleneimine) modified re-compressed exfoliated graphite electrodes. Journal of Applied Electrochemistry 2011, 41, 1389.

Malinga, S.P.; Arotiba O.A.; Krause, R.W.; Mapolie, S.F.; Mamba, B.B. Synthesis and characterisation of generation 2 and 3 poly(propylene imine) dendrimer capped NiFe nanoalloy. Material letters 2012, 68, 324.

Ntsendwana, B.; Mamba, B.B.; Sampath, S.; Arotiba, O.A. Electrochemical Detection of Bisphenol A Using Graphene-Modified Glassy Carbon Electrode. Int. J. Electrochem. Sci. 2012, 7, 3501.

Ndlovu, T.; Arotiba, O.A.; Sampath, S.; Krause, R.W.; Mamba, B.B. An Exfoliated Graphite-Based Bisphenol A Electrochemical Sensor. Sensors, 2012, 12 (9), 11601.

Adekunle, A.S.; Arotiba, O.A.; Mamba, B.B. Electrochemical Studies and Sensing of Iodate, Periodate and Sulphite Ions at carbon Nanotubes/ Prussian Blue Films Modified Platinum Electrode. Int. J. Electrochem. Sci., 2012, 7, 8503.

Ndlovu, T.; Arotiba, O.A.; Sampath, S.; Krause, R.W.; Mamba, B.B. Electroanalysis of copper as heavy metal pollutant in water using cobalt oxide modified exfoliated graphite electrode. Physics and Chemistry of the Earth Part A/B/C. 2012. In Press  

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