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Dr. Marija Gizdavic-Nikolaidis
School of Chemical Sciences, The University of Auckland, Auckland 1142, New Zealand

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0 Biopolymers
0 Electrospinning
0 Nanotechnology
0 Polymer Composites
0 conducting polymers

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Journal article
Published: 16 March 2018 in Materials
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Antimicrobial surfaces can be applied to break transmission pathways in hospitals. Polyaniline (PANI) and poly(3-aminobenzoic acid) (P3ABA) are novel antimicrobial agents with potential as non-leaching additives to provide contamination resistant surfaces. The activity of PANI and P3ABA were investigated in suspension and as part of absorbent and non-absorbent surfaces. The effect of inoculum size and the presence of organic matter on surface activity was determined. PANI and P3ABA both demonstrated bactericidal activity against Escherichia coli and Staphylococcus aureus in suspension and as part of an absorbent surface. Only P3ABA showed antimicrobial activity in non-absorbent films. The results that are presented in this work support the use of P3ABA to create contamination resistant surfaces.

ACS Style

Julia Robertson; Marija Gizdavic-Nikolaidis; Simon Swift. Investigation of Polyaniline and a Functionalised Derivative as Antimicrobial Additives to Create Contamination Resistant Surfaces. Materials 2018, 11, 436 .

AMA Style

Julia Robertson, Marija Gizdavic-Nikolaidis, Simon Swift. Investigation of Polyaniline and a Functionalised Derivative as Antimicrobial Additives to Create Contamination Resistant Surfaces. Materials. 2018; 11 (3):436.

Chicago/Turabian Style

Julia Robertson; Marija Gizdavic-Nikolaidis; Simon Swift. 2018. "Investigation of Polyaniline and a Functionalised Derivative as Antimicrobial Additives to Create Contamination Resistant Surfaces." Materials 11, no. 3: 436.

Journal article
Published: 01 April 2016 in Materials Chemistry and Physics
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The microwave-assisted synthesis of polyaniline (PANI) was performed using ammonium persulphate (APS) as oxidizing agent in 0.5 M–2.5 M concentration range of aqueous sulphuric acid (H2SO4) at 93 W applied microwave power of 10 min duration. The microwave (MW) synthesized PANIs had 3 times higher yield in comparison to PANI samples prepared using a classical method, CS (0 W MW power) at the same temperature for 10 min synthesis duration period. Fourier Transform Infrared (FTIR) and UV–Vis spectroscopies confirmed the formation of PANI structure in all products. The influence of H2SO4 acid dopant on the spin concentration of MW and CS H2SO4 doped PANI samples were examined by EPR spectroscopy, while the morphological characteristics were investigated by using scanning electron microscopy (SEM). XRD results showed amorphous phases in both MW and CS H2SO4 doped PANI samples. Conductivity measurements revealed ∼1.5 times higher conductivity values for MW H2SO4 doped PANI samples in comparison with PANI samples prepared by the CS method under same condition. The influence of sulfate anion in comparison to chloride anion as a dopant on morphological, dopant levels and conductivity properties of MW PANI samples were also investigated.

ACS Style

Marija R. Gizdavic-Nikolaidis; Milutin M. Jevremovic; Maja Milenkovic; Morgan C. Allison; Dragomir Stanisavljev; Graham A. Bowmaker; Zoran D. Zujovic. High yield and facile microwave-assisted synthesis of conductive H2SO4 doped polyanilines. Materials Chemistry and Physics 2016, 173, 255 -261.

AMA Style

Marija R. Gizdavic-Nikolaidis, Milutin M. Jevremovic, Maja Milenkovic, Morgan C. Allison, Dragomir Stanisavljev, Graham A. Bowmaker, Zoran D. Zujovic. High yield and facile microwave-assisted synthesis of conductive H2SO4 doped polyanilines. Materials Chemistry and Physics. 2016; 173 ():255-261.

Chicago/Turabian Style

Marija R. Gizdavic-Nikolaidis; Milutin M. Jevremovic; Maja Milenkovic; Morgan C. Allison; Dragomir Stanisavljev; Graham A. Bowmaker; Zoran D. Zujovic. 2016. "High yield and facile microwave-assisted synthesis of conductive H2SO4 doped polyanilines." Materials Chemistry and Physics 173, no. : 255-261.

Journal article
Published: 01 December 2015 in Colloids and Surfaces B: Biointerfaces
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The purpose of the present study was to investigate the antimicrobial effects of functionalized polyanilines (fPANIs) against stationary phase cells and biofilms of Pseudomonas aeruginosa and Staphylococcus aureus using homopolymer of sulfanilic acid (poly-SO3H) as a model. The chemically synthesized poly-SO3H was characterized using Fourier Transform Infra-Red (FTIR) and Ultraviolet–Visible (UV–Vis) spectroscopies. The molecular weight (Mw) and elemental analysis of homopolymer poly-SO3H were also examined. We found that poly-SO3H was bactericidal against stationary phase cells of P. aeruginosa and S. aureus at a concentration of 20 mg ml−1. Surprisingly, we discovered that the same concentration (20 mg ml−1) of poly-SO3H significantly disrupted and killed bacterial cells present in pre-established forty-eight hour static biofilms of these organisms, as shown by crystal violet and bacterial live/dead fluorescence staining assays. In support of these data, poly-SO3H extensively diminished the expression of bacterial genes related to biofilm formation in stationary phase cells of P. aeruginosa, and seemed to greatly reduce the amount of the quorum sensing molecule N-(3-oxododecanoyl)-l-homoserine lactone (3OC12-HSL) able to be recovered from biofilms of this organism. Furthermore, we found that poly-SO3H was able to effectively penetrate and kill cells in biofilms formed by the P. aeruginosa (AESIII) isolate derived from the sputum of a cystic fibrosis patient. Taken together, the results of the present study emphasise the broad antimicrobial activities of fPANI, and suggest that they could be developed further and used in some novel ways to construct medical devices and/or industrial equipment that are refractory to colonization by biofilm-forming bacteria.

ACS Style

Marija R. Gizdavic-Nikolaidis; Joanne C. Pagnon; Naseem Ali; Reuben Sum; Noel Davies; Louise Roddam; Mark Ambrose. Functionalized polyanilines disrupt Pseudomonas aeruginosa and Staphylococcus aureus biofilms. Colloids and Surfaces B: Biointerfaces 2015, 136, 666 -673.

AMA Style

Marija R. Gizdavic-Nikolaidis, Joanne C. Pagnon, Naseem Ali, Reuben Sum, Noel Davies, Louise Roddam, Mark Ambrose. Functionalized polyanilines disrupt Pseudomonas aeruginosa and Staphylococcus aureus biofilms. Colloids and Surfaces B: Biointerfaces. 2015; 136 ():666-673.

Chicago/Turabian Style

Marija R. Gizdavic-Nikolaidis; Joanne C. Pagnon; Naseem Ali; Reuben Sum; Noel Davies; Louise Roddam; Mark Ambrose. 2015. "Functionalized polyanilines disrupt Pseudomonas aeruginosa and Staphylococcus aureus biofilms." Colloids and Surfaces B: Biointerfaces 136, no. : 666-673.

Journal article
Published: 31 December 2011 in Acta Biomaterialia
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The antimicrobial properties of conductive functionalized polyanilines (fPANI) were investigated by exploring their interaction with bacterial cells. In sharp contrast to polyaniline (PANI), lower concentrations of fPANI were needed to strongly inhibit the growth of wild-type Escherichia coli, Pseudomonas aeruginosa and Staphylococcus aureus, as well as several antibiotic-resistant clinical pathogens. To gain an insight into how fPANI have an impact on cellular physiology we used a whole genome expression study in the model E. coli MG1655 strain exposed to a representative fPANI. The expression levels of 218 (∼5.1%) genes changed significantly. Moreover, we found that certain oxidative damage-responsive genes were strongly induced, while genes potentially involved in energy metabolism and transport and in forming bacterial cell walls and stress-resistant cellular communities (biofilms) were repressed. Taken together, our results appear to indicate that the antimicrobial effects of fPANI, in part at least, might stem from their ability to target the operations of multiple and diverse cellular processes, and suggest that fPANI could be useful ingredients for biomaterials used in the development of food packaging and medical devices.

ACS Style

Marija R. Gizdavic-Nikolaidis; Jared R. Bennett; Simon Swift; Allan J. Easteal; Mark Ambrose. Broad spectrum antimicrobial activity of functionalized polyanilines. Acta Biomaterialia 2011, 7, 4204 -4209.

AMA Style

Marija R. Gizdavic-Nikolaidis, Jared R. Bennett, Simon Swift, Allan J. Easteal, Mark Ambrose. Broad spectrum antimicrobial activity of functionalized polyanilines. Acta Biomaterialia. 2011; 7 (12):4204-4209.

Chicago/Turabian Style

Marija R. Gizdavic-Nikolaidis; Jared R. Bennett; Simon Swift; Allan J. Easteal; Mark Ambrose. 2011. "Broad spectrum antimicrobial activity of functionalized polyanilines." Acta Biomaterialia 7, no. 12: 4204-4209.

Journal article
Published: 09 September 2011 in Journal of Polymer Science Part A: Polymer Chemistry
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Poly(aniline‐co‐ethyl 3‐aminobenzoate) (3EABPANI) copolymer was blended with poly(lactic acid) (PLA) and co‐electrospun into nanofibers to investigate its potential in biomedical applications. The relationship between electrospinning parameters and fiber diameter has been investigated. The mechanical and electrical properties of electrospun 3EABPANI‐PLA nanofibers were also evaluated. To assess cell morphology and biocompatibility, nanofibrous mats of pure PLA and 3EABPANI‐PLA were deposited on glass substrates and the proliferation of COS‐1 fibroblast cells on the nanofibrous polymer surfaces determined. The nanofibrous 3EABPANI‐PLA blends were easily fabricated by electrospinning and gave enhanced mammalian cell growth, antioxidant and antimicrobial capabilities, and electrical conductivity. These results suggest that 3EABPANI‐PLA nanofibrous blends might provide a novel bioactive conductive material for biomedical applications. © 2011 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2011.

ACS Style

Marija Gizdavic‐Nikolaidis; Sudip Ray; Jared Bennett; Simon Swift; Graham Bowmaker; Allan Easteal. Electrospun poly(aniline‐ co ‐ethyl 3‐aminobenzoate)/poly(lactic acid) nanofibers and their potential in biomedical applications. Journal of Polymer Science Part A: Polymer Chemistry 2011, 49, 4902 -4910.

AMA Style

Marija Gizdavic‐Nikolaidis, Sudip Ray, Jared Bennett, Simon Swift, Graham Bowmaker, Allan Easteal. Electrospun poly(aniline‐ co ‐ethyl 3‐aminobenzoate)/poly(lactic acid) nanofibers and their potential in biomedical applications. Journal of Polymer Science Part A: Polymer Chemistry. 2011; 49 (22):4902-4910.

Chicago/Turabian Style

Marija Gizdavic‐Nikolaidis; Sudip Ray; Jared Bennett; Simon Swift; Graham Bowmaker; Allan Easteal. 2011. "Electrospun poly(aniline‐ co ‐ethyl 3‐aminobenzoate)/poly(lactic acid) nanofibers and their potential in biomedical applications." Journal of Polymer Science Part A: Polymer Chemistry 49, no. 22: 4902-4910.

Journal article
Published: 15 March 2010 in Journal of Polymer Science Part A: Polymer Chemistry
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Copolymers of aniline and ethyl 3‐aminobenzoate (3EAB) were synthesized by chemical polymerization in several mole ratios of aniline to functionalized aniline, and their physicochemical properties were compared to those of poly(aniline‐co‐3‐aminobenzoic acid) (3ABAPANI) copolymers. The copolymers were characterized with UV–vis, FTIR, Raman, SEM, EPR, and solid‐state NMR spectroscopy, elemental analysis, and conductivity measurements. The influence of the carboxylic acid and ester group ring substituents on the copolymers was investigated. The spectroscopic studies confirmed incorporation of 3ABA or 3EAB units in the copolymers and hence the presence of CO group in the copolymer chains. The conductivity and EPR signals both decreased with increasing 3EAB content of the copolymers emeraldine salt (ES) form. The conductivity of the ES form of 3ABAPANI was found to be high (1.4 × 10−1 S cm−1) compared with the conductivity (10−2–10−3 S cm−1) of 3EABPANI (ES) copolymers. © 2010 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 48: 1339–1347, 2010

ACS Style

Marija R. Gizdavic-Nikolaidis; Zoran D. Zujovic; Sudip Ray; Allan J. Easteal; Graham A. Bowmaker. Chemical synthesis and characterization of poly(aniline-co-ethyl 3-aminobenzoate) copolymers. Journal of Polymer Science Part A: Polymer Chemistry 2010, 48, 1339 -1347.

AMA Style

Marija R. Gizdavic-Nikolaidis, Zoran D. Zujovic, Sudip Ray, Allan J. Easteal, Graham A. Bowmaker. Chemical synthesis and characterization of poly(aniline-co-ethyl 3-aminobenzoate) copolymers. Journal of Polymer Science Part A: Polymer Chemistry. 2010; 48 (6):1339-1347.

Chicago/Turabian Style

Marija R. Gizdavic-Nikolaidis; Zoran D. Zujovic; Sudip Ray; Allan J. Easteal; Graham A. Bowmaker. 2010. "Chemical synthesis and characterization of poly(aniline-co-ethyl 3-aminobenzoate) copolymers." Journal of Polymer Science Part A: Polymer Chemistry 48, no. 6: 1339-1347.