@prefix prodottidellaricerca: . @prefix istituto: . @prefix prodotto: . istituto:CDS070 prodottidellaricerca:prodotto prodotto:ID298167 . @prefix pubblicazioni: . @prefix unitaDiPersonaleInterno: . unitaDiPersonaleInterno:MATRICOLA720 pubblicazioni:autoreCNRDi prodotto:ID298167 . @prefix modulo: . modulo:ID2177 prodottidellaricerca:prodotto prodotto:ID298167 . unitaDiPersonaleInterno:MATRICOLA12993 pubblicazioni:autoreCNRDi prodotto:ID298167 . @prefix rdf: . prodotto:ID298167 rdf:type prodotto:TIPO1304 . @prefix retescientifica: . prodotto:ID298167 rdf:type retescientifica:ProdottoDellaRicerca . @prefix rdfs: . prodotto:ID298167 rdfs:label "FLAME SYNTHESIS OF METAL NANOPARTICLES (Abstract/Poster in convegno)"@en . @prefix xsd: . prodotto:ID298167 pubblicazioni:anno "2012-01-01T00:00:00+01:00"^^xsd:gYear . @prefix skos: . prodotto:ID298167 skos:altLabel "
G. De Falco*, M. Commodo**, P. Minutolo**, A. D'Anna* (2012)
FLAME SYNTHESIS OF METAL NANOPARTICLES
in 2012 MRS Fall Meeting & Exhibit - Symposium Y: Combustion Synthesis of Functional Nanomaterials, Boston, MA, November 25-30, 2012
"^^rdf:HTML ; pubblicazioni:autori "G. De Falco*, M. Commodo**, P. Minutolo**, A. D'Anna*"^^xsd:string ; skos:note "Abstract"^^xsd:string ; pubblicazioni:affiliazioni "*Dipartimento di Ingegneria Chimica, Universit\u00E0 Federico II, Napoli, ITALY\n**Istituto di Ricerche sulla Combustione, C.N.R., Napoli, ITALY"^^xsd:string ; pubblicazioni:titolo "FLAME SYNTHESIS OF METAL NANOPARTICLES"^^xsd:string ; prodottidellaricerca:abstract "Nanosized materials are playing an increasing crucial role across a wide range of applications, and new advanced techniques for the production of engineered organic and inorganic nanoparticles and their characterization are now in great demand. \nThe aim of this work is the development and control of a high temperature reactor for the production of engineered nanoparticles, taking advantage from our previous studies on combustion-generated fine carbonaceous particles. The reactor consists of a laminar premixed flame, homogenously doped with monodisperse droplets of metal precursors dissolved or dispersed in volatile solvents. The droplets are generated by a vibrating orifice aerosol generator, and injected into the burner, composed by a stainless steel tube with Mullite Zirconia placed on its top. The burner is heated to 135\u00B0C to ensure solvent evaporation and the feeding of the precursor metal particles directly in the high-temperature environment generated by the flame. Fuel-lean and stoichiometric flames allow to produce pure metal oxide particles of nanometric sizes; by changing the flame stoichiometry to fuel-rich conditions, it is possible to obtain mixtures of metal oxide and carbonaceous nanoparticles. \nParticles are collected by thermophoresis, inserting a cold substrate in the flame by means of a pneumatic actuator, that assures a constant sampling time (in the range 10-100ms) for each insertion. Morphological and dimensional analysis are performed on the collected particles by Atomic Force Microscopy (AFM) and Scanning Electron Microscopy (SEM). The latter technique is coupled with Energy-Dispersive X-Ray Spectroscopy measurements, in order to obtain the chemical composition of the generated nanoparticles. SEM and AFM allow inferring both qualitative and quantitative information on many physical properties including size, morphology, surface texture and roughness.\nExperimental results have been obtained from a premixed stoichiometric flame of ethylene and air, doped with 75 microns droplets of magnesium nitrate hexahydrate dissolved in ethanol. Roughly monodisperse magnesium oxide particles, having a desired size ranging from 50 nm down to 4 nm, have been produced by altering the precursors concentration in the solution and the residence time of the synthesis process. Thermophoretic collection of synthesized particles with a significantly high number of multiple insertions of the substrate in flame provides an attractive tool for the formation of functional nanostructured films."@en ; prodottidellaricerca:prodottoDi istituto:CDS070 , modulo:ID2177 ; pubblicazioni:autoreCNR unitaDiPersonaleInterno:MATRICOLA720 , unitaDiPersonaleInterno:MATRICOLA12993 .