In an article published in the journal ‘Acs Nano’, researchers from the Institute for chemical and physical processes (iPCF) CNR of Messina, in collaboration with colleagues at the University ‘of Heidelberg, the Italian Institute of Technology and the University of Genoa’ Paris 13, have created special ‘optical nanoantennas’ new generation, which may serve as the basis for the development of nanobiosensors in able to identify cancer biomarkers. The newness’ of the study consists in having developed nanoantennas capable of operating simultaneously in the visible and infrared, allowing the unique identification of molecular compounds revealed. The optical nanoantennas exploit a property ‘physics known as’ surf ace plasmon resonance’, collective oscillation of free electrons in the metal, to amplify weak optical signals by several orders of magnitude, “said Christian D’Andrea IPCF-CNR , who led the research. “Our work has focused on the design and development of a sensor based on linear optical nanoantennas for the detection of molecules with Raman spectroscopy techniques (Sers) and infrared (Seirs) enhanced by surface plasmon resonance,” added Pietro Gucciardi, coordinator Research, in an interview for the new issue of the Almanac of Science online Cnr. “This result and ‘arrived through careful engineering of the size and geometry, so’ as to excite selectively nanoantennas in the visible and infrared,” says Guicciardini. The study paves the way to the realization of plasmonic nanobiosensors multifunctional, ultra-compact and highly miniaturized easily integrated into architecture ‘lab-on-chip’ that allow you to mini mize the amount ‘of the substance required for analysis. The research is part of the European project FP7-HEALTH-nanoantenna whose NanoSoftLab IPCF the CNR of Messina belongs, together with eleven other academic and industrial partners. Part of the funding come from technology district Sicily ‘Micro and nano-systems’ within the project ‘Hippocrates’.
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