Journal article
Not All Fluorescent Nanodiamonds Are Created Equal: A Comparative Study
P Reineck, LF Trindade, J Havlik, J Stursa, A Heffernan, A Elbourne, A Orth, M Capelli, P Cigler, DA Simpson, BC Gibson
Particle and Particle Systems Characterization | WILEY-V C H VERLAG GMBH | Published : 2019
Abstract
Fluorescent nanodiamonds (FNDs) are vital to many emerging nanotechnological applications, from bioimaging and sensing to quantum nanophotonics. Yet, understanding and engineering the properties of fluorescent defects in nanodiamonds remain challenging. The most comprehensive study to date is presented, of the optical and physical properties of five different nanodiamond samples, in which fluorescent nitrogen-vacancy (NV) centers are created using different fabrication techniques. The FNDs' fluorescence spectra, lifetime, and spin relaxation time (T 1 ) are investigated via single-particle confocal fluorescence microscopy and in ensemble measurements in solution (T 1 excepted). Particle size..
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Funding Acknowledgements
This work was supported by the Australian Research Council (ARC) through its Centre of Excellence for Nanoscale BioPhotonics (Grant No. CE140100003) and the LIEF program (Grant No. LE160100051). The authors are grateful to Ondrej Paces (IOCB of the CAS) for valuable help in design and construction of irradiation containers, and to Dr. David Chvatil and Prof. Jan Kucera (Nuclear Physics Institute of the CAS) for irradiation of nanodiamonds and to Dr. Lucie Bednarova for measurement of IR spectra. P.R. acknowledges funding through the RMIT Vice Chancellor's Research Fellowship. The work of P.C. was supported by the Czech Science Foundation project Nr. 18-17071S, MSM project Nr. 8C18004 (NanoSpin), and European Regional Development Fund; OP RDE; Projects: "Chemical biology for drugging undruggable targets (Chem-BioDrug)" (No. CZ.02.1.01/0.0/0.0/16_019/0000729) and "Carbon allotropes with rationalized nanointerfaces and nanolinks for environmental and biomedical applications" (No. CZ.02.1.01/0.0/0.0/16_026/0008382). Irradiations were supported through Czech Academy of Sciences project Nr. RVO61389005 and through MSMT project Nos. LM2011019 and LM2015056 within the CANAM infrastructure of the NPI CAS Rez. The authors acknowledge the facilities, and the scientific and technical assistance, of the Australian Microscopy & Microanalysis Research Facility at the RMIT Microscopy & Microanalysis Facility, at RMIT University. The authors also acknowledge the use of the MicroNano Research facilities at RMIT University.