Nanodiamond arrays on glass for quantification and fluorescence characterisation
AuthorHeffernan, AH; Greentree, AD; Gibson, BC
Source TitleScientific Reports
PublisherNATURE PUBLISHING GROUP
AffiliationSchool of Physics
Document TypeJournal Article
CitationsHeffernan, A. H., Greentree, A. D. & Gibson, B. C. (2017). Nanodiamond arrays on glass for quantification and fluorescence characterisation. SCIENTIFIC REPORTS, 7 (1), https://doi.org/10.1038/s41598-017-09457-x.
Access StatusOpen Access
Quantifying the variation in emission properties of fluorescent nanodiamonds is important for developing their wide-ranging applicability. Directed self-assembly techniques show promise for positioning nanodiamonds precisely enabling such quantification. Here we show an approach for depositing nanodiamonds in pre-determined arrays which are used to gather statistical information about fluorescent lifetimes. The arrays were created via a layer of photoresist patterned with grids of apertures using electron beam lithography and then drop-cast with nanodiamonds. Electron microscopy revealed a 90% average deposition yield across 3,376 populated array sites, with an average of 20 nanodiamonds per site. Confocal microscopy, optimised for nitrogen vacancy fluorescence collection, revealed a broad distribution of fluorescent lifetimes in agreement with literature. This method for statistically quantifying fluorescent nanoparticles provides a step towards fabrication of hybrid photonic devices for applications from quantum cryptography to sensing.
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