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dc.contributor.authorMahfouz, Remi
dc.contributor.authorFloyd, Daniel L.
dc.contributor.authorPeng, Wei
dc.contributor.authorChoy, Jennifer
dc.contributor.authorLončar, Marko
dc.contributor.authorBakr, Osman
dc.date.accessioned2015-08-03T10:42:04Z
dc.date.available2015-08-03T10:42:04Z
dc.date.issued2013
dc.identifier.issn20403364
dc.identifier.pmid24121668
dc.identifier.doi10.1039/c3nr03320a
dc.identifier.urihttp://hdl.handle.net/10754/562544
dc.description.abstractWe present a facile method for the production of fluorescent diamond nanocrystals (DNCs) of different sizes and efficiently quantify the concentration of emitting defect color centers (DCCs) of each DNC size. We prepared the DNCs by ball-milling commercially available micrometer-sized synthetic (high pressure, high temperature (HPHT)) diamonds and then separated the as-produced DNCs by density gradient ultracentrifugation (DGU) into size-controlled fractions. A protocol to enhance the uniformity of the nitrogen-vacancy (NV) centers in the diamonds was devised by depositing the DNCs as a dense monolayer on amino-silanized silicon substrates and then subjecting the monolayer to He+ beam irradiation. Using a standard confocal setup, we analyzed the average number of NV centers per crystal, and obtained a quantitative relationship between the DNC particle size and the NV number per crystal. This relationship was in good agreement with results from previous studies that used more elaborate setups. Our findings suggest that nanocrystal size separation by DGU may be used to control the number of defects per nanocrystal. The efficient approaches described herein to control and quantify DCCs are valuable to researchers as they explore applications for color centers and new strategies to create them. © 2013 The Royal Society of Chemistry.
dc.description.sponsorshipThe authors acknowledge the financial support of the Office of Competitive Research Funds (OCRF) at King Abdullah University of Science and Technology (KAUST) under the "Competitive Research Grant" (CRG) program no. FIC/2010/02. ML and DLF also acknowledge support from the Schlumberger-Doll Research Center.
dc.publisherRoyal Society of Chemistry (RSC)
dc.titleSize-controlled fluorescent nanodiamonds: A facile method of fabrication and color-center counting
dc.typeArticle
dc.contributor.departmentFunctional Nanomaterials Lab (FuNL)
dc.contributor.departmentKAUST Catalysis Center (KCC)
dc.contributor.departmentKAUST Solar Center (KSC)
dc.contributor.departmentMaterials Science and Engineering Program
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Division
dc.identifier.journalNanoscale
dc.contributor.institutionSchool of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, United States
kaust.personMahfouz, Remi
kaust.personBakr, Osman M.
kaust.personPeng, Wei
kaust.grant.numberFIC/2010/02
kaust.acknowledged.supportUnitCompetitive Research Grant" (CRG)
kaust.acknowledged.supportUnitOffice of Competitive Research Funds (OCRF)


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