Er:Yb:NaY<sub>2</sub>F<sub>5</sub>O up-converting nanoparticles for sub-tissue fluorescence lifetime thermal sensing

Savchuk, Oleksandr A.; Haro‐González, P.; Carvajal, Joan J.; Jaque, Daniel; Massons, J.; Aguiló, Magdalena; Díaz, Francesc

doi:10.1039/c4nr02305f

Cited by 139 publications

(91 citation statements)

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“…[4][5][6][7][8][9][10][11] Indeed, although contact thermometers (such as thermocouples and thermistors) represent the major share of the present market, they require a thermal connection that disturbs the measurements in small systems being, in general, unsuitable for scales below 10 μm. 12 Recent years have witnessed an enormous development in the design of distinct phosphors based on organic dyes, 12 polymers, 13 semiconductor nanocrystals, 14 and trivalent lanthanide (Ln 3+ ) ions 1,2,5,[15][16][17][18][19][20] as luminescence temperature sensors. 12 Recent years have witnessed an enormous development in the design of distinct phosphors based on organic dyes, 12 polymers, 13 semiconductor nanocrystals, 14 and trivalent lanthanide (Ln 3+ ) ions 1,2,5,[15][16][17][18][19][20] as luminescence temperature sensors.…”

Section: Introductionmentioning

confidence: 99%

Boosting the sensitivity of Nd³⁺-based luminescent nanothermometers

et al. 2015

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Luminescence thermal sensing and deep-tissue imaging using nanomaterials operating within the first biological window (ca. 700-980 nm) are of great interest, prompted by the ever-growing demands in the fields of nanotechnology and nanomedicine. Here, we show that (Gd1-xNdx)2O3 (x = 0.009, 0.024 and 0.049) nanorods exhibit one of the highest thermal sensitivity and temperature uncertainty reported so far (1.75 ± 0.04% K(-1) and 0.14 ± 0.05 K, respectively) for a nanothermometer operating in the first transparent near infrared window at temperatures in the physiological range. This sensitivity value is achieved using a common R928 photomultiplier tube that allows defining the thermometric parameter as the integrated intensity ratio between the (4)F5/2 → (4)I9/2 and (4)F3/2 → (4)I9/2 transitions (with an energy difference between the barycentres of the two transitions >1000 cm(-1)). Moreover, the measured sensitivity is one order of magnitude higher than the values reported so far for Nd(3+)-based nanothermometers enlarging, therefore, the potential of using Nd(3+) ions in luminescence thermal sensing and deep-tissue imaging.

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Section: Introductionmentioning

confidence: 99%

Boosting the sensitivity of Nd³⁺-based luminescent nanothermometers

et al. 2015

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“…Up to now, one of the most popular arrangement applied for the remote temperature sensing is the Er 3+ , Yb 3+ up-converting system [13][14][15][16] . The Yb 3+ -Er 3+ belongs to the first class of temperature probing, where the 2 H 11/2 level of Er 3+ ion stays in thermal equilibrium with metastable 3 S 3/2 level within the same ion.…”

Section: Introductionmentioning

confidence: 99%

Near infrared absorbing near infrared emitting highly-sensitive luminescent nanothermometer based on Nd³⁺ to Yb³⁺ energy transfer

Marciniak

Bednarkiewicz

Stefański

et al. 2015

Phys. Chem. Chem. Phys.

183

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A new type of near infrared absorbing near infrared emitting (NANE) luminescent nanothermometer is presented, with a physical background that relies on efficient Nd(3+) to Yb(3+) energy transfer under 808 nm photo-excitation. The emission spectra of LiLa0.9-xNd0.1YbxP4O12 (x = 0.05, 0.1, 0.2, 0.3, 0.5) nanocrystals were measured in a wide 100-700 °C temperature range. The ratio between the Nd(3+) ((4)F3/2→(4)I9/2) and Yb(3+) ((2)F5/2→(2)F7/2) luminescence bands, and the thermometer sensitivity were found to be strongly dependent on the Yb(3+) concentration. These phenomenological relations were discussed in terms of the competition between three phenomena, namely (a) Nd(3+)→ Yb(3+) phonon assisted energy transfer, (b) Yb(3+)→ Nd(3+) back energy transfer and (c) energy diffusion between Yb(3+) ions. The highest sensitivity of the temperature measurement was found for x = 0.5 (LiLa0.4Nd0.1Yb0.5P4O12), which was equal to 4 × 10(-3) K(-1) at 330 K. In stark contrast to conventional approaches, the proposed phosphate host matrix allows for a high level of doping, and thus, owing to the negligible concentration quenching, the presented luminophores exhibit a high absorption cross section and bright emission. Moreover, such optical remote thermometers, whose excitation and emission wavelengths are weakly scattered or absorbed and fall into the optical transmission window of the skin, may therefore become a practical solution for biomedical applications, such as remote control of thermotherapy.

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“…The sensitivity of the microdiamonds has been evaluated in order to compare them with other common probes used for lifetime thermal sensing. [25][26][27][28] (Details are presented in Ref. 23.)…”

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confidence: 99%

Diamond contact-less micrometric temperature sensors

Homeyer

Pailhés

Debord

et al. 2015

Applied Physics Letters

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An alternative approach for high-speed temperature measurement with micrometer-scale spatial resolution based on the luminescence of Ni-doped diamond micro-particles is described. Under picosecond pulsed laser excitation, these particles exhibit intense green luminescence; the lifetime of this luminescence decreases by several orders of magnitude upon heating from 120 K up to 900 K. The intensity of the luminescence remains constant over this temperature range. Real-time measurements were performed with repetition rates of up to 100 Hz with a temperature resolution of better than 1 °C.

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Er:Yb:NaY₂F₅O up-converting nanoparticles for sub-tissue fluorescence lifetime thermal sensing

Cited by 139 publications

References 50 publications

Boosting the sensitivity of Nd³⁺-based luminescent nanothermometers

Boosting the sensitivity of Nd³⁺-based luminescent nanothermometers

Near infrared absorbing near infrared emitting highly-sensitive luminescent nanothermometer based on Nd³⁺ to Yb³⁺ energy transfer

Diamond contact-less micrometric temperature sensors

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Er:Yb:NaY2F5O up-converting nanoparticles for sub-tissue fluorescence lifetime thermal sensing

Cited by 139 publications

References 50 publications

Boosting the sensitivity of Nd3+-based luminescent nanothermometers

Boosting the sensitivity of Nd3+-based luminescent nanothermometers

Near infrared absorbing near infrared emitting highly-sensitive luminescent nanothermometer based on Nd3+ to Yb3+ energy transfer

Diamond contact-less micrometric temperature sensors

Contact Info

Product

Resources

About

Er:Yb:NaY₂F₅O up-converting nanoparticles for sub-tissue fluorescence lifetime thermal sensing

Boosting the sensitivity of Nd³⁺-based luminescent nanothermometers

Boosting the sensitivity of Nd³⁺-based luminescent nanothermometers

Near infrared absorbing near infrared emitting highly-sensitive luminescent nanothermometer based on Nd³⁺ to Yb³⁺ energy transfer