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dc.contributor.authorVillani, M.
dc.contributor.authorOnesto, V.
dc.contributor.authorColuccio, M.L.
dc.contributor.authorValpapuram, I.
dc.contributor.authorMajewska, R.
dc.contributor.authorAlabastri, A.
dc.contributor.authorBattista, E.
dc.contributor.authorSchirato, A.
dc.contributor.authorCalestani, D.
dc.contributor.authorCoppedé, N.
dc.contributor.authorZappettini, A.
dc.contributor.authorAmato, F.
dc.contributor.authorDi Fabrizio, Enzo M.
dc.contributor.authorGentile, F.
dc.date.accessioned2019-03-11T07:16:21Z
dc.date.available2019-03-11T07:16:21Z
dc.date.issued2018-12-18
dc.identifier.citationVillani M, Onesto V, Coluccio ML, Valpapuram I, Majewska R, et al. (2019) Transforming diatomaceous earth into sensing devices by surface modification with gold nanoparticles. Micro and Nano Engineering 2: 29–34. Available: http://dx.doi.org/10.1016/j.mne.2018.11.006.
dc.identifier.issn2590-0072
dc.identifier.doi10.1016/j.mne.2018.11.006
dc.identifier.urihttp://hdl.handle.net/10754/631538
dc.description.abstractDiatomaceous earth, or diatomite, is produced through the accumulation of diatom (Bacillariophyceae) skeletons (i.e. cell walls called frustules) made of amorphous silica. The porous, highly symmetrical structure and microscopic size of diatom cell walls make them ideal constituents of sensing devices and analytical chips. Here, we propose chemical methods to purify diatom frustules extracted from diatomaceous earth. Using photo deposition techniques, we grow gold nanoparticles on the surface of diatom skeletons and within the pores of the skeletons, where the size and density of nanoparticles can be controlled by changing the parameters of the synthesis. Resulting devices have an internal porous structure that can harvest molecules from a solution, and an external shell of gold nanoparticles that amplifies the electromagnetic field generated by the measurement laser in Raman or other spectroscopies. The combination of these effects enables the analysis of biological specimens, chemical analytes and pollutants in extremely low abundance ranges. The devices were demonstrated in the analysis of Bovine Serum Albumin in water with a concentration of 100 aM, and mineral oil with a concentration of 50 ppm.
dc.publisherElsevier BV
dc.relation.urlhttps://www.sciencedirect.com/science/article/pii/S2590007218300169
dc.rightsThis is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectBio-sensors
dc.subjectDiatomite
dc.subjectDiatoms
dc.subjectGold nanoparticles
dc.subjectPhoto-deposition
dc.subjectSERS
dc.titleTransforming diatomaceous earth into sensing devices by surface modification with gold nanoparticles
dc.typeArticle
dc.contributor.departmentMaterial Science and Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalMicro and Nano Engineering
dc.eprint.versionPublisher's Version/PDF
dc.contributor.institutionIMEM-CNR, Parco Area delle Scienze 37/A, Parma, 43124, , Italy
dc.contributor.institutionDepartment of Experimental and Clinical Medicine, University Magna Graecia, Catanzaro, 88100, , Italy
dc.contributor.institutionSouth African Institute for Aquatic Biodiversity, Grahamstown, 6140, , South Africa
dc.contributor.institutionUnit for Environmental Sciences and Management, School of Biological Sciences, North-West University, Potchefstroom, 2520, , South Africa
dc.contributor.institutionDepartment of Physics and Astronomy, Rice University, Houston, TX, 77005, , United States
dc.contributor.institutionInterdisciplinary Research Center on Biomaterials, University Federico II, Naples, 80125, , Italy
dc.contributor.institutionDepartment of Physics, Politecnico di Milano, Milan, I-20133, , Italy
dc.contributor.institutionDepartment of Electrical Engineering and Information Technology, University Federico II, Naples, 80125, , Italy
kaust.personDi Fabrizio, Enzo M.
refterms.dateFOA2019-03-11T08:21:50Z
dc.date.published-online2018-12-18
dc.date.published-print2019-03


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This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Except where otherwise noted, this item's license is described as This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)