Showing papers by "Aoife Morrin published in 2007"
TL;DR: PANI nanodispersions doped with dodecylbenzenesulfonic acid were synthesized and successfully inkjet-printed using a piezoelectric desktop printer, resulting in the highest conductivity and electrochemistry of the resulting films was well-defined and stable.
Abstract: Aqueous polyaniline (PANI) nanodispersions doped with dodecylbenzenesulfonic acid (DBSA) were synthesized and successfully inkjet-printed using a piezoelectric desktop printer. This paper examines the optimization and characterization of the nanoparticulate formulation for optimal film electrochemistry and stability. PANI nanoparticle synthesis was optimized in terms of the ratio of monomer (aniline) to oxidant (ammonium persulphate, APS) and dopant (DBSA). Particle size, UV−vis spectroscopy, electrochemical, and conductivity analyses were performed on all materials. Optimal synthesis conditions were found to be at a molar ratio of 1.0:0.5:1.2 aniline/APS/DBSA. This resulting nanodispersion showed a uniform particle size distribution of ∼82 nm, and UV−vis analysis indicated a high doping level. These synthetic conditions resulted in the highest conductivity, and the electrochemistry of the resulting films was well-defined and stable. Surface tension analysis and rheological studies demonstrated that the a...
121 citations
TL;DR: In this paper, the interaction of an electropolymerised polyaniline film with silica microparticles on glassy carbon electrodes was investigated, and it was found that the polymer grew preferentially around the silica particles rather than on the underlying electrode surface.
41 citations
TL;DR: A family of nanostructured polyaniline (PANI) materials including polystyrene (PS)/PANI core/shell particles, PANI hollow spheres, PANi/PS nanocomposite and nanoporous PANI, were conveniently prepared by surface charge control of PS nanoparticle templates which resulted in different polymer growth mechanisms when PANI was electropolymerized around the templates.
33 citations
29 citations
Patent•
13 Apr 2007TL;DR: In this paper, a printing composition for printing onto a substrate, the composition comprising nanoparticles of a conducting polymer such as polyanaline, is described, and a sensor is defined.
Abstract: A sensor comprises a substrate having nanoparticles of a conducting polymer such as polyanaline printed thereon. Also described is a printing composition for printing onto a substrate, the composition comprising nanoparticles of a conducting polymer such as polyanaline.
23 citations
TL;DR: In this paper, a colloidal gold-labeled antigoat antibody was used for the visualization of two immunosensor platforms where an antiatrazine single chain antibody and an antibiotin were immobilized on the surface, respectively.
Abstract: A method to visualize an immunointeraction occurring at an electrode surface by the use of scanning electron microscopy is demonstrated. A colloidal gold-labeled antigoat antibody was used for the visualization of two immunosensor platforms where an antiatrazine single chain antibody and an antibiotin were immobilized on the surface, respectively. Firstly, a silver enhancement treatment was optimized in order to improve the visualization of the gold label. Subsequently, protein distribution on the surface was evaluated in relation to the immobilization time. Finally, this method was adopted to evaluate specific immunological interactions. Comparing the images of the immunosensor surfaces with those of different control surfaces, it was established that the immunological interactions were effectively occurring at the electrode and it was also possible to gain an appreciation of the extent and distribution of the immunological interaction at the electrode surface and the level of non-specific binding occurring. Energy Dispersive X-ray (EDX) analysis was also performed for a qualitative evaluation of the atomic electrode surface composition.
3 citations