0000000000358559

AUTHOR

Davide Cammi

showing 3 related works from this author

Shifting the Photoresponse of ZnO Nanowires into the Visible Spectral Range by Surface Functionalization with Tailor-Made Carbon Nanodots

2018

We report on the surface functionalization of ZnO nanowires (NWs) with specifically synthesized carbon nanodots (C-dots, CDs) that allows us to shift the photoresponse of the NWs far into the visib...

Materials scienceVisible spectral rangeZno nanowiresNanotechnology02 engineering and technology010402 general chemistry021001 nanoscience & nanotechnology01 natural sciences0104 chemical sciencesSurfaces Coatings and FilmsElectronic Optical and Magnetic MaterialsGeneral EnergyCarbon nanodotsSurface modificationPhysical and Theoretical Chemistry0210 nano-technologyThe Journal of Physical Chemistry C
researchProduct

Enhancement of the sub-band-gap photoconductivity in ZnO nanowires through surface functionalization with carbon nanodots

2018

We report on the surface functionalization of ZnO nanowire (NW) arrays by attachment of carbon nanodots (C-dots) stabilized by polyethylenimine. The photoconductive properties of the ZnO NWs/C-dots devices were investigated under photoexcitation with photon energies below and above the ZnO band gap. The results indicate an increased photoresponse of the functionalized devices in the visible spectral range, as well as enhanced UV photoconductivity. This is attributed to the fast injection of photoexcited electrons from the C-dots into the conduction band of the ZnO NWs, and the subsequent slower desorption of molecular species from the NW surface, which reduces the surface depletion region i…

Materials scienceBand gapNanowire02 engineering and technology010402 general chemistry01 natural sciencesDepletion regionNanotechnologyPhysical and Theoretical ChemistryPhotocurrentbusiness.industryNanotecnologiaPhotoconductivityNanostructured materials021001 nanoscience & nanotechnology0104 chemical sciencesSurfaces Coatings and FilmsElectronic Optical and Magnetic MaterialsPhotoexcitationGeneral EnergyOptoelectronicsSurface modificationCharge carrierMaterials nanoestructurats0210 nano-technologybusiness
researchProduct

Non-resonant Raman spectroscopy of individual ZnO nanowires via Au nanorod surface plasmons

2016

We present a non-resonant Raman spectroscopy study of individual ZnO nanowires mediated by Au nanorod surface plasmons. In this approach, selective excitation of the plasmonic oscillations with radiation energy below the semiconductor bandgap was used to probe surface optical modes of individual ZnO nanowires without simultaneous excitation of bulk phonons modes or band-edge photoluminescence. The development of a reproducible method for decoration of nanowires with colloidal Au nanorods allowed performing an extensive statistical analysis addressing the variability and reproducibility of the Raman features found in the hybrid nanostructures. An estimated field enhancement factor of 103 was…

Materials sciencePhotoluminescencePhononNanowirePhysics::OpticsNanotechnology02 engineering and technology010402 general chemistry01 natural sciencesCondensed Matter::Materials Sciencesymbols.namesakeMaterials ChemistryPlasmonbusiness.industrySurface plasmonGeneral ChemistryCondensed Matter::Mesoscopic Systems and Quantum Hall Effect021001 nanoscience & nanotechnology0104 chemical sciencesSemiconductorsymbolsOptoelectronicsNanorod0210 nano-technologybusinessRaman spectroscopyJournal of Materials Chemistry C
researchProduct