Microscopic structure of nickel-dopant centers in diamond

Larico, R.; Machado, W.V.M.; Justo, J. F.; Assali, L. V. C.

doi:10.1590/s0103-97332006000300009

Cited by 2 publications

(4 citation statements)

References 14 publications

(24 reference statements)

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“…As some properties of Ni-and Cr-containing luminescence ND centres (e.g. atom positions, chemical interactions, charge) continue to be uncertain, [20][21][22][23][30][31][32][33][34][35][36][37]46 DFT modelling should be a very useful tool for understanding the specific conditions of the observed luminescence processes.…”

Section: Resultsmentioning

confidence: 99%

“…16,[25][26][27][28] Nickel-related emitters have been studied as plausible candidates. [30][31][32][33] Recently discovered chromium-related centres 16,[34][35][36] are particularly attractive owing to their narrow bandwidth emission observed even at room temperature. It has been shown that Cr emitters can be successfully fabricated by ion implantation of chromium with oxygen or sulfur atoms.…”

Section: Introductionmentioning

confidence: 99%

“…It has been shown that Cr emitters can be successfully fabricated by ion implantation of chromium with oxygen or sulfur atoms. 29,30 Ni-and Cr-containing luminescence centres have very short emission lifetimes-from 1 to 4 ns, whereas NV centres have emission lifetimes an order of magnitude longer: NV 0 -29 ns, NV À -13 ns. 27 New experimental findings bring the need for theoretical analysis.…”

Section: Introductionmentioning

confidence: 99%

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Tuning of nanodiamond particles' optical properties by structural defects and surface modifications: DFT modelling

et al. 2011

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Tuning of nanodiamond particles' optical properties by structural defects and surface modifications: DFT modelling

et al. 2011

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“…The exact positions of the 1.4-eV lines depend on the strain in the sample [11]. Despite the variability of some characteristic, the Ni-related centers can be observed for many synthetic and natural diamonds [21,22] including high-temperature highpressure ND [17,23].…”

Section: Resultsmentioning

confidence: 99%

Near-Infrared Fluorescence from Nanodiamond for Multimodal Bioimaging

Lin¹,

Tsai²,

Perevedentseva³

et al. 2018

Sovrem Tehnol Med

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Nanodiamonds (ND) are emerging as a promising candidate for the multimodal bioimaging due to their optical and spectroscopic properties. Fluorescence properties of ND are determined by defects and admixtures in the crystal lattice. The most developed bioapplications of the ND fluorescence are using nitrogen-vacancy centers. However they emit fluorescence in the visible region which overlaps with the autofluorescence from biological objects.The aim of the study was to analyze the fluorescence of nickel-related color center in nanodiamond with emission in the near-infrared range (883-885 nm) in terms of its applications for bioimaging using one-photon and two-photon excitations.Materials and Methods. Synthetic diamond powders (Kay Diamond, USA) of sizes in the range from 100 nm to 2.5 μm were carboxylated and characterized with Raman and photoluminescence spectroscopy at one-photon and two-photon excitation. Baby hamster kidney cells were treated with 500 nm ND for 8 h and subjected to microscopic investigations using laser confocal fluorescence scanning microscopy and photoluminescence mapping.Results. The effects of the particles size, temperature and excitation conditions on the fluorescence of Ni-related center are studied. Variability of the emission with sizes (as well as with excitation wavelength and temperature) gives the possibility to select the most suitable nano-or microparticles to use as a fluorescent probe. The two-photon excitation of Ni centers in nano-and microdiamond are demonstrated. The possibility to use Ni color center for bioimaging is presented using confocal fluorescence imaging and fluorescence mapping of distribution of 500 nm ND in baby hamster kidney cells. The emission of Ni-related center (885 nm) showing no photobleaching and no damage to the baby hamster kidney cells and the location of ND is clearly observed relatively the cells.Conclusion. Fluorescence from Ni-related color center at one-photon and two-photon excitation can be an option in biological imaging to avoid cell autofluorescence and to shift the excitation to lower energy laser excitation which is safer and transparent for biological objects.Key words: nanodiamond; Ni-related defects; near-infrared emission; color center; fluorescence; bioimaging. Corresponding author: Chia-Liang Cheng, e-mail: clcheng@gms.ndhu.edu.tw RussianФлюоресценция наноалмазов в ближнем инфракрасном диапазоне. Использование для мультимодального биоимиджингаОптические и спектральные свойства наноалмазов в настоящее время рассматриваются с точки зрения применения в биоме-дицинских исследованиях, в частности как флюоресцентные метки для биоимиджинга. Флюоресценция наноалмазов определяется в первую очередь дефектами и примесями в кристаллической решетке. Наиболее хорошо изученными и используемыми флюорес-центыми центрами в наноалмазах являются азотные вакансии. Однако они излучают в видимой области спектра и их излучение перекрывается с автофлюоресценцией большинства биологических объектов.Цель исследования -изучение флюоресценции никелевого центра...

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Microscopic structure of nickel-dopant centers in diamond

Cited by 2 publications

References 14 publications

Tuning of nanodiamond particles' optical properties by structural defects and surface modifications: DFT modelling

Tuning of nanodiamond particles' optical properties by structural defects and surface modifications: DFT modelling

Near-Infrared Fluorescence from Nanodiamond for Multimodal Bioimaging

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