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Dr Philani N. Mashazi

Headshot Dr Mashazi

DR PHILANI NKOSINATHI MASHAZI

BSC, BSC(HONS), MSC, PHD (RHODES)
LECTURER (ANALYTICAL AND INORGANIC CHEMISTRY)

 
Dr Mashazi, spent 7 years at the Council for Minerals Technology (Mintek) as a research scientist from February 2007 to September 2013. During his tenure at Mintek, Dr Mashazi studied his doctoral degree part-time and graduated with the Doctor of Philosophy (PhD) degree at Rhodes University in April 2012. He rejoins Rhodes University Chemistry Department as a Senior Lecturer of Inorganic Chemistry since October 2013. He is currently involved in many departmental activities whilst pursuing his research interests. He further provides support to the National Facility funded by the Department of Science and Technology, the Nanotechnology Innovation Centre (DST NIC). He manages two state-of-the-art equipments, that is the X-ray photoelectron spectroscopy (XPS) and the soon-to-be-commissioned TOF-SIMS (Time-of-flight Secondary Ion Mass Spectrometry). Both these techniques are a very sensitive surface analytical techniques well established for many industrial and research applications.
 
TEACHING

  • 1st Year – Kinetics and Electrochemistry
  • 2nd Year – Kinetics and Electroanalytical Techniques
  • 3rd Year – Crystallography
  • Honours - Intelligent Nanomaterials and Their Applications, Design and Development of Biosensors


RESEARCH INTERESTS

  • Optical, Electrochemical and Immunochromatographic Lateral Flow (Bio)Sensors Design and Developments for Point-of-Care Applications
  • Nanoelectrochemistry - methods of modifying electrode surfaces with nanomaterials and electrocatalytic materials as thin films for sensor applications. 
  • Disease biomarker detection using electrochemical and optical biosensors – design and development of cheap, sensitive and reliable electrochemical and optical diagnostic systems for the detection of biomarkers for communicable and non-communicable diseases. 
  • Nanobioconjugate strategies – methods of integrating biological molecules with nano-sized materials for the design of highly sensitive and selective novel sensors and/or biosensors.
  • Design of Lateral-Flow and Electrochemical detection systems for diagnostic applications. 


PUBLICATIONS

2017 Publications:

  1.  Daniel Mwanza, Sindisiwe Mvango, Samson Khene, Tebello Nyokong, Philani Mashazi**, Exploiting click chemistry for the covalent immobilization of tetra (4-propargyloxyphenoxy) metallophthalocyanines onto prehylazide grafted gold surfaces, Electrochimica Acta, 254 (2017) 89 – 100. https://doi.org/10.1016/j.electacta.2017.09.115.
  2. Zainab O. Makinde, Marcel Louzada, Philani Mashazi, Tebello Nyokong, Samson Khene, Electrocatalytic behaviour surface of confined pentanethio cobalt (II) binuclear phthalocyanines towards the oxidation of 4-chlorophenol, Applied Surface Science, 425 (2017) 702–712. http://dx.doi.org/doi:10.1016/j.apsusc.2017.06.271.
  3. Daniel Mwanza, Samson Khene, Philani Mashazi**, Tetra (4-propargyloxyphenoxy) phthalocyanines: facile synthesis, fluorescence and thermal properties, Polyhedron, 134 (2017) 263–274, http://dx.doi.org/10.1016/j.poly.2017.06.029.
  4. Sandile S. Gwebu, Philiswa N. Nomngongo, Philani N Mashazi, Tebello Nyokong, Nobanathi Maxakato, Platinum Nanoparticles Supported on Carbon Nanodots as Anode Catalysts for Direct Alcohol Fuel Cells, Int. J. Electrochem. Sci., 12 (2017) 6365 – 6378, http://dx.doi.org/10.20964/2017.07.09.
  5. Siphesihle Robin Nxele, Philani Mashazi, Tebello Nyokong, Surface functionalization of glassy carbon electrodes via adsorption, electrografting and click chemistry using quantum dots and alkynyl substituted phthalocyanines: a brief review, Proceedings SPIE,  V10036 (2017) 100360D, Fourth Conference on Sensors, MEMS, and Electro-Optic Systems. http://dx.doi.org/10.1117/12.2245687.
  6. Mbuso Mlambo, Richard A. Harris, Philani Mashazi, Myalowenkosi Sabela, Suvardhan Kanchi, Lawrence M. Madikizela, Prince N. Shumbula, Nosipho Moloto, Thulani T. Hlatshwayo, Phumlani S. Mdluli, Computational and experimental evaluation of selective substitution of thiolated coumarin derivatives on gold nanoparticles: surface enhancing Raman scattering and electrochemical studies, Applied Surface Science 396 (2017) 695 - 704. http://dx.doi.org/10.1016/j.apsusc.2016.11.011.

 

Older:

(7)            Donovan M. Mafukidze, Philani Mashazi, Tebello Nyokong, Synthesis and singlet oxygen production by a phthalocyanine when embedded in asymmetric polymer membranes, Polymer 105 (2016) 203 - 213. http://dx.doi.org/10.1016/j.polymer.2016.10.032.

(8)            Olawale L. Osifeko, Imran Uddin, Philani N. Mashazi, Tebello Nyokong, Physicochemical and antimicrobial photodynamic chemotherapy of unsymmetrical indium phthalocyanines alone on in the presence of magnetic nanoparticles, New Journal of Chemistry, 2016 (40) 2710 - 2721. http://dx.doi.org/10.1039/c5nj01922b.

(9)            Stephen Nyoni, Philani Mashazi, Tebello Nyokong, Electrode modification using nanocomposites of electropolymerised cobalt phthalocyanines supported on multi-walled carbon nanotubes, Journal of Solid State Electrochemical, 2016 (20) 1075 – 1086. http://dx.doi.org/10.1007/s10008-015-2985-6.

(10)         Oluwasesan Adegoke, Philani Mashazi, Tebello Nyokong, Patricia B.C. Forbes, Fluorescence properties of alloyed ZnSeS quantum dots overcoated with ZnTe and ZnTe/ZnS shells, Optical Materials , 2016 (54) 104 - 110. http://dx.doi.org/10.1016/j.optmat.2016.02.024.

(11)         Munyaradzi Shumba, Philani Mashazi, Tebello Nyokong “Turn on” fluorescence enhancement of Zn octacarboxy phthaloyanine-Graphene Oxide Conjugates by hydrogen peroxide. Journal of Luminescence, 2016 (170) 317-324. http://dx.doi.org/10.1016/j.jlumin.2015.11.001.

(12)         Sihle Nxele, Philani Mashazi, Tebello Nyokong, Construction of a Hydrazine Sensor using an Alkynyl Tetra-Substituted Fe(II) Phthalocyanine via Electrografting and Click Chemistry, Electroanalysis, 2015 (27) 2468-2478. http://dx.doi.org/10.1002/elan.201500212.

(13)         Sarah D’Souza, Philani Mashazi, Jonathan Britton, Tebello Nyokong, Effects of differently shaped silver nanoparticles on the photophysics of mercaptopyridine-substituted phthalocyanines, Polyhedron, 2015 (99) 112–121. http://dx.doi.org/10.1016/j.poly.2015.06.038.

(14)         David Oluwole, Jonathan Britton, Philani Mashazi, Tebello Nyokong, 'Synthesis and photophysical properties of nanocomposites of aluminum tetrasulfonated phthalocyanine covalently linked to glutathione capped CdTe/CdS/ZnS quantum dots, Synthetic Metals, 2015 (205) 212-221. http://dx.doi.org/10.1016/j.synthmet.2015.04.015.

(15)         Racheal Ogbodu, Edith Amuhaya, Philani Mashazi, Tebello Nyokong, Photophysical Properties of Zinc Phthalocyanine-Uridine Single Walled Carbon Nanotube – conjugates, Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2015(149) 231-239. http://dx.doi.org/10.1016/j.saa.2015.04.040.

(16)         Stephen Nyoni, Philani Mashazi, Tebello Nyokong, Iodine-Doped Cobalt Phthalocyanine Supported on Multiwalled Carbon Nanotubes for Electrocatalysis of Oxygen Reduction Reaction, Electroanalysis, 2015 (27) 1176-1187. http://dx.doi.org/10.1002/elan.201400499.

(17)         Audacity Maringa, Philani Mashazi, Tebello Nyokong, Electrocatalytic activity of bimetallic Au-Pd nanoparticles in the presence of cobalt tetra-amino phthalocyanine, Journal of Colloidal and Interface Science 2015 (440) 151–161. http://dx.doi.org/10.1016/j.jcis.2014.10.056.

(18)         Audacity Maringa, Philani Mashazi, Tebello Nyokong, Characterization of electrodes modified by one-pot or step-by-step electro-click reaction and axial ligation of iron tetra-carboxy phthalocyanine, Electrochimica Acta, 2014 (145) 237 - 244. http://dx.doi.org/10.1016/j.electacta.2014.09.011.

(19)         Philani Mashazi**, Sibulelo Vilakazi, Tebello Nyokong, Design and evaluation of an electrochemical immunosensor for measles serodiagnosis using measles-specific Immunoglobulin G antibodies, Talanta, 2013 (115) 694 – 701. http://dx.doi.org/10.1016/j.talanta.2013.06.036.

(20)         Mbuso Mlambo, Siyasanga Mpelane, Phumlane Mdluli, Philani Mashazi, Lucky Sikhwivhilu, Nosipho Moloto and Makwena Moloto, Unique flexible silver dendrites thin films fabricated on cellulose dialysis cassettes, Journal of Material Science, 2013 (48) 6418 - 6425. http://dx.doi.org/10.1007/s10853-013-7442-2.

(21)         Philani Mashazi**, Phumlani Tetyana, Sibulelo Vilakazi and Tebello Nyokong, Electrochemical impedimetric immunosensor for the detection of measles-specific IgG antibodies after measles infections, Biosensors and Bioelectronics, 2013 (49) 32 - 38. http://dx.doi.org/10.1016/j.bios.2013.04.028.

(22)         Philani N. Mashazi**, Nolwazi Nombona, Munkombwe Muchindu and Sibulelo Vilakazi, metallophthalocyanines and metalloporphyrins as electrocatalysts: a case of hydrogen peroxide and glucose detection, Journal of Porphyrins and Phthalocyanines, 2012 (16) 741 - 753. http://dx.doi.org/10.1142/S1088424612300066.

(23)         Ndabenhle M. Sosibo, Phumlani S. Mdluli, Philani N. Mashazi**, Robert T. Tshikhudo, Amanda Skepu, Sibulelo Vilakazi and Tebello Nyokong, Facile Deposition of Gold Nanoparticle Thin Films on Semi-Permeable Cellulose Substrate, Material Letters, 2012 (88) 132 - 135. http://dx.doi.org/10.1016/j.matlet.2012.08.043.

(24)         Ndabenhle M. Sosibo, Phumlani S. Mdluli, Philani N. Mashazi, Busiswa Dyan, Tebello Nyokong, Robert T. Tshikhudo, Amanda Skepu and Elma van der Lingen, Synthesis, Density Functional Theory, Molecular Dynamics and Electrochemical Studies of 3-Thiopheneacetic Acid-Capped Gold Nanoparticles, Journal of Molecular Structure, 2011 (1006) 494 - 501.  http://dx.doi.org/10.1016/j.molstruc.2011.09.057.

(25)         Phumlani S. Mdluli, Ndabenhle M. Sosibo, Philani N. Mashazi, Tebello Nyokong, Robert T. Tshikhudo, Amanda Skepu and Elma van der Lingen, Selective Adsorption of PVP on the Surface of Silver Nanoparticles: A Molecular Dynamics Study, Journal of Molecular Structure, 2011 (1004) 131 – 137. http://dx.doi.org/10.1016/j.molstruc. 2011.07.049.

(26)         Philani Mashazi, Tawanda Mugadza, Ndabenhle Sosibo, Phumlani Mdluli, Sibulelo Vilakazi and Tebello Nyokong , The effects of carbon nanotubes on the electrocatalysis of hydrogen peroxide by metallo-phthalocyanines. Talanta, 2011 (85) 2202 - 2211. http://dx.doi.org/10.1016/j.talanta.2011.07.069.

(27)         Philani Mashazi; Chamunorwa Togo, Janice Limson, Tebello Nyokong, Applications of polymerized metal tetra-amino phthalocyanines towards hydrogen peroxide detection, Journal of Porphyrins and Phthalocyanines, 2010 (14) 252-263. http://dx.doi.org/10.1142/S1088424610001994.

(28)         Philani Mashazi, Tebello Nyokong, Electrocatalytic studies of covalently immobilized metal tetra-amino phthalocyanines onto derivatized screen-printed gold electrodes, Microchimica Acta, 2010, (171) 321-332. http://dx.doi.org/10.1007/s00604-010-0438-6.

(29)         Philani Mashazi, Edith Antunes, Tebello Nyokong, Probing electrochemical and electrocatalytic properties of cobalt(II) and manganese(III) octakis(hexylthio)phthalocyanine as self-assembled monolayers, Journal of Porphyrins and Phthalocyanines, 2010 (14) 932-947. http://dx.doi.org/10.1142/S108842461000277X.

(30)         Ronen Fogel, Philani Mashazi, Tebello Nyokong, Janice Limson, Critical assessment of the Quartz Crystal Microbalance with Dissipation as an analytical tool for biosensor development and fundamental studies: Metallophthalocyanine-?glucose oxidase biocomposite sensors, Biosensors & Bioelectronics (2007), 23(1), 95-101. http://dx.doi.org/10.1016/j.bios.2007.03.012.

(31)         Philani N. Mashazi, Philippe Westbroek, Kenneth I. Ozoemena, Tebello Nyokong, Surface chemistry and electrocatalytic behavior of tetra-carboxy substituted iron, cobalt and manganese phthalocyanine self-assembled monolayers on gold electrode, Electrochimica Acta,  2007 (53) 1858-1869. http://dx.doi.org/10.1016/j.electacta.2007.08.044.

(32)        Philani N. Mashazi, Kenneth I. Ozoemena, Tebello Nyokong, Tetracarboxylic acid cobalt phthalocyanine SAM on gold: Potential applications as amperometric sensor for H2O2 and fabrication of glucose biosensor, Electrochimica Acta, 2006 (52) 177-186. http://dx.doi.org/10.1016/j.electacta.2006.04.056.

(33)        Philani N. Mashazi, Kenneth I. Ozoemena, David M. Maree, Tebello Nyokong, Self-assembled monolayers (SAMs) of cobalt tetra-carboxylic acid chloride phthalocyanine covalently attached onto a preformed mercaptoethanol SAM: A novel method, Electrochimica Acta, 2006 (51) 3489-3494. http://dx.doi.org/10.1016/j.electacta.2005.10.004.

 

CONTACT INFORMATION


Tel: +27 46 6038846
Fax: +2746 6225109
Email: p.mashazi@ru.ac.za
Postal Address: Department of Chemistry, Rhodes University, PO Box 94, Grahamstown, 6140, SOUTH AFRICA.
Courier Address: Room F44, Department of Chemistry, Corner of University and Artillery Roads, Rhodes University, Grahamstown, 6140, SOUTH AFRICA.

Last Modified: Thu, 29 Mar 2018 08:59:34 SAST