1,721,041 research outputs found
Self-organized ion-beam synthesis of nanowires with broadband plasmonic functionality
No full textThe controlled production of nanostructures endowed with well-selected shapes and reduced dimensionality represents a multidisciplinary key activity in nanotechnology. In particular, a great effort is currently oriented at the development of metal nanoparticle arrays in order to exploit the strong field-enhancement effects associated with the excitation of localized surface plasmon resonances. Here we demonstrate that ion-beam sputtering can be successfully employed to convert a polycrystalline metal film into a disconnected array of nanowires supported on a flat dielectric substrate. The nanowire arrays exhibit spectrally selective dichroic absorption due to the excitation of localized plasmon oscillations. The possibility to tailor the broadband plasmonic response has been demonstrated by finely tuning the morphological parameters of the arrays
Procedimento per la produzione di un dispositivo fotonico comprendente un array di nanofili metallici
No full textTransparent Plasmonic Nanowire Electrodes via Self‐Organised Ion Beam Nanopatterning
No full textHere we report on a self-organised approach for the synthesis of transparent metal nanowire arrays based on defocused ion beam sputtering. The nanowire arrays supported on low cost dielectric substrates (glass slides) feature a dual functionality: they exhibit anisotropic conductivity, with sheet resistances which are reduced in comparison to the transparent conductive oxides, and additionally support localised plasmon resonances. The latter represents an attractive feature in view of Plasmon enhanced photon harvesting applications in which the nanostructured metal electrodes are employed as an alternative to conventional transparent conductive oxides
Tailoring broadband light trapping of GaAs and Si substrates by self-organised nanopatterning
No full textMethod for the synthesis of an array of metal nanowire capable of supporting localized plasmon resonances and photonic device comprising said array
No full textMethod for the synthesis of an array of metal nanowires supporting localized Plasmon resonances , and photonic device comprising said array
No full textIl brevetto descrive la sintesi auto-organizzata di Nanofili metallici supportati su substrati a basso costo di vetro. I nanofili metallici presentano bassa resistenza elettrica di strato inferiore ai 5 Ohm sq, buona trasparenza ottica. Vantaggiosamente inoltre i nanofili metallici supportano risonanza plasmoniche localizzate. Queste proprietà rendono i nuovi materiali una promettente alternativa agli ossidi conduttori trasparenti convenzionali, se utilizzati come substrati per dispositivi fotonici quali celle solari a film sottile
METHOD FOR THE SYNTHESIS OF AN ARRAY OF METAL NANOWIRES CAPABLE OF SUPPORTING LOCALIZED PLASMON RESONANCES AND METHOD FOR MAKING A PHOTONIC DEVICE COMPRISING SAID ARRAY
No full textSelf-organized broadband light trapping in thin film amorphous silicon solar cells
No full textNanostructured glass substrates endowed with high aspect ratio one-dimensional corrugations are prepared by defocused ion beam erosion through a self-organized gold (Au) stencil mask. The shielding action of the stencil mask is amplified by co-deposition of gold atoms during ion bombardment. The resulting glass nanostructures enable broadband anti-reflection functionality and at the same time ensure a high efficiency for diffuse light scattering (Haze). It is demonstrated that the patterned glass substrates exhibit a better photon harvesting than the flat glass substrate in p-i-n type thin film a-Si:H solar cells
METHOD FOR THE SYNTHESIS OF AN ARRAY OF METAL NANOWIRES CAPABLE OF SUPPORTING LOCALIZED PLASMON RESONANCES AND PHOTONIC DEVICE COMPRISING SAID ARRAY
No full textMethod for the synthesis of an array of metal nanowires (w) capable of supporting localized plasmon resonances, wherein a metal film (M) deposited on a planar substrate (D) is irradiated with a defocused beam of noble gas ions (IB) under high vacuum, so that, with increasing ion doses: a corrugation is produced on the metal film surface, formed by a plurality of mutually parallel nanoscale self-organized corrugations (r); subsequently, the height of the self-organized corrugations peaks is increased relative to the valleys (t) interposed therebetween; then, the whole the metal film is eroded so as to expose the substrate at the valleys, and to mutually disconnect the self-organized corrugations, thereby generating said array of metal nanowires; and finally, the transversal cross-section of the nanowires is reduced in a controlled manner so as to adjust the localized plasmon resonances wavelength which can be associated thereto. The nanowires array constitutes an electrode of an improved photonic device
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