Mass production of fluorescent nanodiamonds with a narrow emission intensity distribution

Štursa, Jan; Havlík, Jan; Petráková, Vladimíra; Gulka, Michal; Ráliš, J.; Zach, V.; Pulec, Zdenek; Štěpán, Václav; Zargaleh, Soroush Abbasi; Ledvina, M; Nesládek, Miloš; Treussart, François; Cígler, Petr

doi:10.1016/j.carbon.2015.09.111

Cited by 39 publications

(35 citation statements)

References 61 publications

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“…The trend observed for the samples e − , p + , and He 2+ (where the exact processing parameters are known) may originate in the irradiation process itself: Both e − and p + were irradiated in a macroscopic layer of nanoparticles on a solid target. The energy loss of protons is characterized by a Bragg curve, where significantly more vacancies are created in the region of the Bragg peak, which is positioned inside the particle layer . This effect is slightly less pronounced for electrons due to their higher penetration depth .…”

Section: Resultsmentioning

confidence: 99%

“…"> 2.Inhomogeneous irradiation. Depending on the exact process and sample geometry used to create vacancies via irradiation, the number of vacancies created in individual particles may vary widely . Hence, even in particles with identical nitrogen concentrations, the absence of vacancies can be the limiting factor for the formation of NV centers.…”

Section: Discussionmentioning

confidence: 99%

“…In HPHT diamond, high concentrations of NV centers are generally created via irradiation with high‐energy particles for the creation of vacancies, followed by annealing that enables vacancies to diffuse and form NV centers with substitutional nitrogen. Particles used commonly today for irradiation include electrons, protons, and He + . Also, various annealing processes as well as different milling and chemical and physical purification protocols for the fabrication of pure diamond nanoparticles exist .…”

Section: Introductionmentioning

confidence: 99%

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Not All Fluorescent Nanodiamonds Are Created Equal: A Comparative Study

Reineck

Trindade

Havlík

et al. 2019

Part & Part Syst Charact

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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 (T1) are investigated via single‐particle confocal fluorescence microscopy and in ensemble measurements in solution (T1 excepted). Particle sizes and shapes are determined using scanning electron microscopy and correlated with the optical results. Statistical tests are used to explore correlations between the properties of individual particles and also analyze average results to directly compare different fabrication techniques. Spectral unmixing is used to quantify the relative NV charge‐state (NV− and NV0) contributions to the overall fluorescence. A strong variation is found and quantified in the properties of individual particles within all analyzed samples and significant differences between the different particle types. This study is an important contribution toward understanding the properties of NV centers in nanodiamonds. It motivates new approaches to the improved engineering of NV‐containing nanodiamonds for future applications.

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Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Not All Fluorescent Nanodiamonds Are Created Equal: A Comparative Study

Reineck

Trindade

Havlík

et al. 2019

Part & Part Syst Charact

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“…Detailed descriptions for preparation of fluorescent NDs with NV centres57, their coating with HPMA polymer and synthesis of Gd 3+ complexes can be found in the Supplementary Information. Briefly, alkyne-modified HPMA-coated NDs were decorated with azide-modified Gd 3+ complexes using Cu(I)-catalysed azide-alkyne cycloaddition (CuACC).…”

Section: Methodsmentioning

confidence: 99%

Optical imaging of localized chemical events using programmable diamond quantum nanosensors

et al. 2017

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Development of multifunctional nanoscale sensors working under physiological conditions enables monitoring of intracellular processes that are important for various biological and medical applications. By attaching paramagnetic gadolinium complexes to nanodiamonds (NDs) with nitrogen-vacancy (NV) centres through surface engineering, we developed a hybrid nanoscale sensor that can be adjusted to directly monitor physiological species through a proposed sensing scheme based on NV spin relaxometry. We adopt a single-step method to measure spin relaxation rates enabling time-dependent measurements on changes in pH or redox potential at a submicrometre-length scale in a microfluidic channel that mimics cellular environments. Our experimental data are reproduced by numerical simulations of the NV spin interaction with gadolinium complexes covering the NDs. Considering the versatile engineering options provided by polymer chemistry, the underlying mechanism can be expanded to detect a variety of physiologically relevant species and variables.

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“…In that way, 15% of the original mass was transformed to the powder below 10 nm size. The more recent approach with irradiation in aqueous colloidal solution [17] increased the fNDs fraction but the ideal way of production of fNDs remains as a serious challenge.…”

Section: The Manufacturing Of Diamond Containing Nv Centersmentioning

confidence: 99%

Diamond nanocrystals with nitrogen-vacancy centers as new type temperature sensors

Rudnicki¹,

Mrózek²,

Gawlik³

et al. 2016

Mechanik

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Nitrogen vacancy color centers in diamond (NVs) as a new type of temperature sensors were presented in the article. Recent progress in the field of NV thermometry and summarize the techniques of NVs manufacturing was briefly discussed. The use of NVs for characterization of thermoelectric materials was proposed. KEYWORDS: nitrogen-vacancy, NV, thermometry, thermoelectrics, nanodiamondsW artykule zaprezentowano centra barwne azot-wakancja (NV) w diamentach w roli czujnika temperatury nowego typu. Krótko omówiono ostatnie doniesienia naukowe oraz podsumowano techniki wytwarzania diamentów z centrami NV. Zaproponowano nowatorskie wykorzystanie centrów NV do badania materiałów termoelektrycznych SŁOWA KLUCZOWE: azot-wakancja, NV, termometria, termoelektryki, nanodiamenty Modern thermometryMany methods have been developed for measuring temperature. Among the most important challenges remaining in the thermometry field are high-sensitivity measurements with a sub-micrometer spatial resolution. The development of precise micro-/nanoscale temperature measurements is important in many research fields [1]. It might be very useful e.g. to track and control intracellular processes in biology/medicine [2], chemical reactions [1] and/or quality of the new materials (e.g. thermoelectrics or semiconductors). These issues motivate a demand for new sensors and drive the progress in the field. Examples of the new developments are scanning thermal microscopes [3], dispersed or scanned fluorescent nanoprobes [4,5], and Raman spectroscopes [6]. Despite many novel techniques, precise nanoscale temperature measurements have not been realized so far. The nitrogen-vacancy (NV) center in diamond is a promising candidate to fill this gap. Diamond with NV center as a temperature sensorDiamond crystals are known for high hardness and chemical inertness. Thanks to the superb thermal conductivity, diamond is also an ideal material to host a temperature sensor. In this paper the nitrogen-vacancy color centers are introduced [7]. These extraordinary objects are used as sensors in different fields, like quantum information processing [8], magnetometry [9], optical tracking [2] and thermometry [1]. The NV center may be incorporated into nanodiamonds (NDs) and serve as a thermometric sensor, which might be localized with a nanometer resolution [1]. Moreover, nanodiamonds are biocompatible and might be introduced and tracked within living cells [2]. The sensing is performed optically in an non-contact and non-destructive way. The sensitivity of such sensors could potentially reach 1 mK [10]. They can be used for temperature measurements up to about 600 K.The NV center consists of a substitutional-nitrogen atom and an adjacent lattice vacancy. The electronic structure of the center contains two triplet levels (spin equal to 1) split by 1.945 eV, which lie within the diamond electronic band gap. The optical excitation of the center with a green light results in a strong and stable red fluorescence [11] (see figure). In room-temperature the ground-stat...

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Mass production of fluorescent nanodiamonds with a narrow emission intensity distribution

Cited by 39 publications

References 61 publications

Not All Fluorescent Nanodiamonds Are Created Equal: A Comparative Study

Not All Fluorescent Nanodiamonds Are Created Equal: A Comparative Study

Optical imaging of localized chemical events using programmable diamond quantum nanosensors

Diamond nanocrystals with nitrogen-vacancy centers as new type temperature sensors

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