In this study, we have investigated for the first time the use of isoindigo derivatives as sensitizers in NiObased\ud dye-sensitized solar cells (DSSCs). For this purpose, two indigo sensitizers were prepared and their\ud electronic properties were characterized by UV/visible spectroscopy, cyclic voltammetry and timedependent\ud density functional theory (TD-DFT). The first dye contains a N,N-di(4-benzoic acid)\ud phenylamine moiety acting as anchoring/donor group, and the isoindigo acting as the acceptor, while\ud the second compound is a dyad which is based on the same structure, but is additionally\ud functionalized with a naphthalene imide unit, acting as a secondary electron acceptor. The electronic\ud properties were also modeled by TD-DFT quantum chemistry calculations and they revealed that\ud a charge transfer band is present between the trisarylamine donor part and the isoindigo moiety. The\ud photovoltaic performances of these new dyes were evaluated in NiO-based DSSCs with both iodide/\ud triiodide and cobalt electrolytes. It turned out that they perform well since the photocurrent was\ud generated up to the wavelength of 700 nm. Altogether, these results underscore the viability of\ud isoindigo dyes for p-DSSCs

The detection of Rhamnolipid virulence factor produced by Pseudomonas aeruginosa involved in nosocomial infections is reported by using the redox liposome single impact electrochemistry. Redox liposomes based on 1,2dimyristoyl-sn-glycero-3-phosphocholine as a pure phospholipid and potassium ferrocyanide as an encapsulated redox content are designed for using the interaction of the target toxin with the lipid membrane as a sensing strategy. The electrochemical sensing principle is based on the weakening of the liposomes lipid membrane upon interaction with Rhamnolipid toxin which leads upon impact at an ultramicroelectrode to the breakdown of the liposomes and the release/electrolysis of its encapsulated redox probe. We present as a proof of concept the sensitive and fast sensing of a submicromolar concentration of Rhamnolipid which is detected after less than 30 minutes of incubation with the liposomes, by the appearing of current spikes in the chronoamperometry measurement.