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dc.contributor.authorGentile, Francesco
dc.contributor.authorLaura Coluccio, Maria
dc.contributor.authorCandeloro, Patrizio
dc.contributor.authorBarberio, Marianna
dc.contributor.authorPerozziello, Gerardo
dc.contributor.authorFrancardi, Marco
dc.contributor.authorDi Fabrizio, Enzo M.
dc.date.accessioned2015-05-04T16:10:47Z
dc.date.available2015-05-04T16:10:47Z
dc.date.issued2014-04-04
dc.identifier.citationElectroless deposition of metal nanoparticle clusters: Effect of pattern distance 2014, 32 (3):031804 Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures
dc.identifier.issn2166-2746
dc.identifier.issn1520-8567
dc.identifier.doi10.1116/1.4870058
dc.identifier.urihttp://hdl.handle.net/10754/552145
dc.description.abstractElectroless plating is a deposition technique in which metal ions are reduced as atoms on specific patterned sites of a silicon surface to form metal nanoparticles (NPs) aggregates with the desired characteristics. Those NPs, in turn, can be used as constituents of surface enhanced Raman spectroscopy substrates, which are devices where the electromagnetic field and effects thereof are giantly amplified. Here, the electroless formation of nanostructures was studied as a function of the geometry of the substrate. High resolution, electron beam lithography techniques were used to obtain nonperiodic arrays of circular patterns, in which the spacing of patterns was varied over a significant range. In depositing silver atoms in those circuits, the authors found that the characteristics of the aggregates vary with the pattern distance. When the patterns are in close proximity, the interference of different groups of adjacent aggregates cannot be disregarded and the overall growth is reduced. Differently from this, when the patterns are sufficiently distant, the formation of metal clusters of NPs is independent on the spacing of the patterns. For the particular subset of parameters used here, this critical correlation distance is about three times the pattern diameter. These findings were explained within the framework of a diffusion limited aggregation model, which is a simulation method that can decipher the formation of nanoaggregates at an atomic level. In the discussion, the authors showed how this concept can be used to fabricate ordered arrays of silver nanospheres, where the size of those spheres may be regulated on varying the pattern distance, for applications in biosensing and single molecule detection.
dc.publisherAmerican Vacuum Society
dc.relation.urlhttp://scitation.aip.org/content/avs/journal/jvstb/32/3/10.1116/1.4870058
dc.rightsArchived with thanks to Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures
dc.titleElectroless deposition of metal nanoparticle clusters: Effect of pattern distance
dc.typeArticle
dc.contributor.departmentMaterial Science and Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalJournal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures
dc.eprint.versionPublisher's Version/PDF
dc.contributor.institutionBioNEM (Bio Nano Engineering and Technology for Medicine), University Magna Graecia of Catanzaro—Catanzaro 88100, Italy and Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
dc.contributor.institutionBioNEM (Bio Nano Engineering and Technology for Medicine), University Magna Graecia of Catanzaro—Catanzaro 88100, Italy
dc.contributor.institutionBioNEM (Bio Nano Engineering and Technology for Medicine), University Magna Graecia of Catanzaro—Catanzaro 88100, Italy
dc.contributor.institutionDepartment of Physics, Università della Calabria, Via P. Bucci 33c, 87036 Rende, Italy
dc.contributor.institutionBioNEM (Bio Nano Engineering and Technology for Medicine), University Magna Graecia of Catanzaro—Catanzaro 88100, Italy
kaust.personFrancardi, Marco
kaust.personDi Fabrizio, Enzo M.
refterms.dateFOA2018-06-14T07:32:45Z
dc.date.published-online2014-04-04
dc.date.published-print2014-05


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