Search results for "RAY PHOTOELECTRON-SPECTROSCOPY"

showing 2 items of 2 documents

Spectroscopic and Theoretical Study of the Grafting Modes of Phosphonic Acids on ZnO Nanorods

2013

Metal oxides are versatile substrates for the design of a wide range of SAM-based organic-inorganic materials among which ZnO nanostructures modified with phosphonic SAM are promising semiconducting systems for applications in technological fields such as biosensing, photonics, and field-effect transistors (FET). Despite previous studies reported on various successful grafting approaches, issues regarding preferred anchoring modes of phosphonic acids and the role of a second reactive group (i.e., a carboxylic group) are still a matter of controversial interpretations. This paper reports on an experimental and theoretical study on the functionalization of ZnO nanorods with monofunctional alk…

Materials scienceNanostructureOXIDE SURFACESNanoparticleMetalchemistry.chemical_compoundSELF-ASSEMBLED MONOLAYERSNANOPARTICLESOrganic chemistrySELF-ASSEMBLED MONOLAYERS; RAY PHOTOELECTRON-SPECTROSCOPY; POLARIZABLE CONTINUUM MODEL; MOLECULAR-ORBITAL METHODS; SENSITIZED SOLAR-CELLS; SURFACE FUNCTIONALIZATION; OXIDE SURFACES; ZINC-OXIDE; NANOPARTICLES; ALUMINUMZINC-OXIDEPhysical and Theoretical ChemistryBifunctionalSelf-assembled monolayerSURFACE FUNCTIONALIZATIONALUMINUMCombinatorial chemistrySurfaces Coatings and FilmsElectronic Optical and Magnetic MaterialsMOLECULAR-ORBITAL METHODSGeneral EnergychemistryPOLARIZABLE CONTINUUM MODELvisual_artRAY PHOTOELECTRON-SPECTROSCOPYvisual_art.visual_art_mediumSurface modificationNanorodSENSITIZED SOLAR-CELLSBiosensorThe Journal of Physical Chemistry C
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Light absorption in silicon quantum dots embedded in silica

2009

The photon absorption in Si quantum dots (QDs) embedded in SiO2 has been systematically investigated by varying several parameters of the QD synthesis. Plasma-enhanced chemical vapor deposition (PECVD) or magnetron cosputtering (MS) have been used to deposit, upon quartz substrates, single layer, or multilayer structures of Si-rich- SiO2 (SRO) with different Si content (43-46 at. %). SRO samples have been annealed for 1 h in the 450-1250 °C range and characterized by optical absorption measurements, photoluminescence analysis, Rutherford backscattering spectrometry and x-ray Photoelectron Spectroscopy. After annealing up to 900 °C SRO films grown by MS show a higher absorption coefficient a…

SOLAR-CELLSPhotoluminescenceMaterials scienceEFFICIENCYSiliconAnalytical chemistryGeneral Physics and Astronomychemistry.chemical_elementChemical vapor depositionOPTICAL-PROPERTIESRutherford backscattering spectrometryFILMSSettore ING-INF/01 - Elettronica3RD-GENERATION PHOTOVOLTAICSSettore FIS/03 - Fisica Della MateriaMULTIPLE EXCITON GENERATIONchemistryX-ray photoelectron spectroscopyPlasma-enhanced chemical vapor depositionQuantum dotRAY PHOTOELECTRON-SPECTROSCOPYLUMINESCENCESI NANOCRYSTALSCOEFFICIENTAbsorption (electromagnetic radiation)
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