Browsing Chemistry by Author "Baker, Priscilla"
Now showing items 1-16 of 16
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Actuation behaviour of a derivatized pyrrole accordion type polymer
Ward, Meryck; Botha, Shanielle; Iwuoha, Emmanuel I.; Baker, Priscilla (ESG, 2014)A monomer (Phenazine-2,3-diimino(pyrrole-2-yl)–PDP) derived from the condensation reaction between 2,3-diaminophenazine and a pyrrole derivative has been synthesized as a hinge molecule in the design of a zig-zag polymer. ... -
Application on gold nanoparticles-dotted 4-nitrophenylazo graphene in a label-free impedimetric deoxynivalenol immunosensor
Sunday, Christopher Edozie; Masikini, Malua; Wilson, Lindsay; Rassie, Candice; Waryo, Tesfaye T.; Baker, Priscilla; Iwuoha, Emmanuel I. (MDPI, 2015)In this paper, we report a new concept to construct a label-free electrochemical inhibition-based immunosensor for the detection of the mycotoxin deoxynivalenol (DON) in cereal samples. The electrochemical impedance ... -
Aptameric recognition-modulated electroactivity of poly(4-styrenesolfonic acid)-doped polyaniline films for single-shot detection of tetrodotoxin
Fomo, Gertrude; Waryo, Tesfaye T.; Sunday, Christopher Edozie; Baleg, Abd A.; Baker, Priscilla; Iwuoha, Emmanuel I. (MDPI, 2015)The work being reported is the first electrochemical sensor for tetrodotoxin (TTX). It was developed on a glassy carbon electrodes (C) that was modified with poly(4-styrenesolfonic acid)-doped polyaniline film (PANI/PSSA). ... -
Carcinoembryonic antigen immunosensor developed with organoclay nanogold composite film
Kemmegne-Mbouguen, Justin Claude; Ngameni, Emmanuel; Baker, Priscilla; Waryo, Tesfaye T.; Kgarebe, Boitumelo; Iwuoha, Emmanuel I. (ESG, 2014)Organoclay nanogold composite were prepared using gold nanoparticles and the natural Cameroonian clay grafted with amino organosilane. The functionnalization of clay provided abundant amino group to assemble gold nanoparticles. ... -
Correction: Baker, P. et al. electrochemical aptasensor for endocrine disrupting 17β-estradiol based on a poly(3,4-ethylenedioxylthiopene)-gold nanocomposite platform. Sensors 2010, 10, 9872-9890
Olowu, Rasaq A.; Arotiba, Omotayo A.; Mailu, Stephen N.; Waryo, Tesfaye T.; Baker, Priscilla; Iwuoha, Emmanuel I. (MDPI, 2011)Herewith please find corrected structures for Figure 8 in our paper published in Sensors in 2010. -
Determination of anthracene on Ag-Au alloy nanoparticles/overoxidized-polypyrrole composite modified glassy carbon electrodes
Mailu, Stephen N.; Waryo, Tesfaye T.; Ndangili, Peter M.; Ngece, Fanelwa R.; Baleg, Abd A.; Baker, Priscilla; Iwuoha, Emmanuel I. (MDPI, 2010)A novel electrochemical sensor for the detection of anthracene was prepared by modifying a glassy carbon electrode (GCE) with over-oxidized polypyrrole (PPyox) and Ag-Au (1:3) bimetallic nanoparticles (Ag-AuNPs). The ... -
Determination of binding constants for the complexes between heavy metal ions and cucurbit[n]uril
Murray, Alenzo; Baker, Priscilla; Iwuoha, Emmanuel (John Wiley and Sons Inc, 2024)One of the major concerns worldwide is the rapid increase in water pollution with hazardous heavy metals. The Cucurbit[n]uril (CB[n]) structure provides an inner hydrophobic cavity accessible through two electrostatically ... -
Electrochemical aptasensor for endocrine disrupting 17β-estradiol based on a poly(3,4-ethylenedioxylthiopene)-gold nanocomposite platform
Olowu, Rasaq A.; Mailu, Stephen N.; Waryo, Tesfaye T.; Baker, Priscilla; Iwuoha, Emmanuel I.; Arotiba, Omotayo A. (MDPI, 2010)A simple and highly sensitive electrochemical DNA aptasensor with high affinity for endocrine disrupting 17β-estradiol, was developed. Poly(3,4-ethylenedioxylthiophene) (PEDOT) doped with gold nanoparticles (AuNPs) was ... -
An electrochemical DNA biosensor developed on a nanocomposite platform of gold and poly(propyleneimine) dendrimer
Arotiba, Omotayo A.; Owino, Joseph; Songa, Everlyne; Hendricks, Nicolette; Waryo, Tesfaye T.; Jahed, Nazeem; Baker, Priscilla; Iwuoha, Emmanuel I. (MDPI, 2008)An electrochemical DNA nanobiosensor was prepared by immobilization of a 20mer thiolated probe DNA on electro-deposited generation 4 (G4) poly(propyleneimine) dendrimer (PPI) doped with gold nanoparticles (AuNP) as ... -
Electrochemical immunosensor based on polythionine/gold nanoparticles for the determination of Aflatoxin B1
Owino, Joseph H.O.; Arotiba, Omotayo A.; Hendricks, Nicolette; Songa, Everlyne; Jahed, Nazeem; Waryo, Tesfaye T.; Ngece, Rachel F.; Baker, Priscilla; Iwuoha, Emmanuel I. (MDPI, 2008)An aflatoxin B1 (AFB1) electrochemical immunosensor was developed by the immobilisation of aflatoxin B1-bovine serum albumin (AFB1-BSA) conjugate on a polythionine (PTH)/gold nanoparticles (AuNP)-modified glassy carbon ... -
Electrochemically reduced graphene oxide pencil-graphite in situ plated bismuth-film electrode for the determination of trace metals by anodic stripping voltammetry
Pokpas, Keagan; Zbeda, Salma; Jahed, Nazeem; Mohamed, Nuralli; Baker, Priscilla; Iwuoha, Emmanuel I. (ESG, 2014)An electrochemical platform was developed based on a pencil-graphite electrode (PGE) modified with electrochemically reduced graphene oxide (ERGO) sheets and in conjunction with an in situ plated bismuth-film (ERGO-PG-BiE). ... -
Few-layer binder free graphene modified mercury film electrode for trace metal analysis by square wave anodic stripping voltammetry
Zbeda, Salma; Pokpas, Keagan; Titinchi, Salam J.J.; Jahed, Nazeem; Baker, Priscilla; Iwuoha, Emmanuel I. (ESG, 2013)A binding agent free graphene modified glassy carbon electrode in combination with an in situ plated mercury film electrode (Gr-GC-HgFE) was used as a highly sensitive electrochemical platform for the determination of Zn2+, ... -
Impedimetric and electrochemical evaluation of a new redox active steroid derivative for hormone immunosensing
Kelch, Jessica; Delaney, Aoife; Baker, Priscilla (Elsevier, 2020)Preparation and electrochemical interrogation of a novel redox active progesterone derivative progesterone thiosemicarbazone (PATC) is presented here together with an investigation into its suitability as conjugate ... -
Influence of quantum dot surface on electrochemical DNA sensing mechanism
Fuku, Xolile; Baker, Priscilla; Iwuoha, Emmanuel (Wiley, 2020)Owing to their high surface‐to‐volume ratio, electrocatalytic activity, biocompatibility and novel electron transport properties, quantum dots (QDs) are highly attractive materials for the ultrasensitive detection of ... -
Metallo-graphene nanocomposite electrocatalytic platform for the determination of toxic metal ions
Willemse, Chandre M.; Tlhomelang, Khotso; Jahed, Nazeem; Baker, Priscilla; Iwuoha, Emmanuel I. (MDPI, 2011)A Nafion-Graphene (Nafion-G) nanocomposite solution in combination with an in situ plated mercury film electrode was used as a highly sensitive electrochemical platform for the determination of Zn2+, Cd2+, Pb2+ and Cu2+ ... -
Polyester sulphonic acid interstitial nanocomposite platform for peroxide biosensor
Al-Ahmed, Amir; Ndangili, Peter M.; Jahed, Nazeem; Baker, Priscilla; Iwuoha, Emmanuel I. (MDPI, 2009)A novel enzyme immobilization platform was prepared on a platinum disk working electrode by polymerizing aniline inside the interstitial pores of polyester sulphonic acid sodium salt (PESA). Scanning electron microscopy ...