Thermochromic upconversion nanoparticles for visual temperature sensors with high thermal, spatial and temporal resolution

Savchuk, Oleksandr A.; Carvajal, Joan J.; Cascales, C.; Massons, J.; Aguiló, Magdalena; Díaz, Francesc

doi:10.1039/c6tc01841f

Cited by 65 publications

(47 citation statements)

References 52 publications

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“…Some of these materials are required in case of low energy consumption and high information processing power multielectronic equipment useful in different industrial sectors such as space, aerospace, aeronautics as well as in nuclear fields or packaging and store industries. [8]…”

Section: Introductionmentioning

confidence: 99%

“…Within this context, the development of multistimuli‐responsive materials is quite meaningful for ever‐growing multiple requirements, e.g., simultaneous mechanochromic and thermochromic luminescence or temperature and pressure sensors. Some of these materials are required in case of low energy consumption and high information processing power multielectronic equipment useful in different industrial sectors such as space, aerospace, aeronautics as well as in nuclear fields, or packaging and store industries …”

Section: Introductionmentioning

confidence: 99%

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Multistimuli Response Micro‐ and Nanolayers of a Coordination Polymer Based on Cu₂I₂ Chains Linked by 2‐Aminopyrazine

Conesa‐Egea

Gallardo-Martínez

Delgado

et al. 2017

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A nonporous laminar coordination polymer of formula [Cu I (2-aminopyrazine)] is prepared by direct reaction between CuI and 2-aminopyrazine, two industrially available building blocks. The fine tuning of the reaction conditions allows obtaining [Cu I (2-aminopyrazine)] in micrometric and nanometric sizes with same structure and composition. Interestingly, both materials show similar reversible thermo- and pressure-luminescent response as well as reversible electrical response to volatile organic solvents such as acetic acid. X-ray diffraction studies under different conditions, temperatures and pressures, in combination with theoretical calculations allow rationalizing the physical properties of this compound and its changes under physical stimuli. Thus, the emission dramatically increases when lowering the temperature, while an enhancement of the pressure produces a decrease in the emission intensity. These observations emerge as a direct consequence of the high structural flexibility of the Cu I chains which undergo a contraction in CuCu distances as far as temperature decreases or pressure increases. However, the strong structural changes observed under high pressure lead to an unexpected effect that produces a less effective CuCu orbital overlapping that justifies the decrease in the intensity emission. This work shows the high potential of materials based on Cu I chains for new applications.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Multistimuli Response Micro‐ and Nanolayers of a Coordination Polymer Based on Cu₂I₂ Chains Linked by 2‐Aminopyrazine

Conesa‐Egea

Gallardo-Martínez

Delgado

et al. 2017

Small

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show abstract

“…4b . The relative temperature sensitivity can reach as high as 3.0% K −1 at low temperature, and is still greater than 1.0% K −1 at high temperature, which is better than the performance of most materials 18 19 20 25 .…”

Section: Resultsmentioning

confidence: 91%

Real-time micro-scale temperature imaging at low cost based on fluorescent intensity ratio

Xiong

Zhao

Han

et al. 2017

Sci Rep

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Real-time temperature imaging with high spatial resolution has been a challenging task but also one with wide potential applications. To achieve this task, temperature sensor is critical. Fluorescent materials stand out to be promising candidates due to their quick response and strong temperature dependence. However, former reported temperature imaging techniques with fluorescent materials are mainly based on point by point scanning, which cannot fulfill the requirement of real-time monitoring. Based on fluorescent intensity ratio (FIR) of two emission bands of SrB4O7:Sm2+, whose spatial distributions were simultaneously recorded by two cameras with special filters separately, real-time temperature imaging with high spatial resolution has been realized with low cost. The temperature resolution can reach about 2 °C in the temperature range from 120 to 280 °C; the spatial resolution is about 2.4 μm and the imaging time is as fast as one second. Adopting this system, we observed the dynamic change of a micro-scale thermal distribution on a printed circuit board (PCB). Different applications and better performance could also be achieved on this system with appropriate fluorescent materials and high sensitive CCD detectors according to the experimental environment.

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“…Along with the non-radiative relaxation from the 3 F 2 level, Tm-Tm cross-relaxation processes have been previously reported which involve depopulation of the 1 G 4 level and population of the 3 F 3 and 3 H 4 levels. These mechanisms are favored as Tm 3+ concentration and temperature increase [30]. Furthermore, a non-radiative decay after the second energy transfer from the 2 F 5/2 level of Yb 3+ allows for populating the 3 H 4 level of Tm 3+ very efficiently, since its energy gap (~3400 cm −1 ) matches the phonon energy of OHgroups adsorbed on the silica surface [27].…”

Section: Resultsmentioning

confidence: 99%

Bifunctional Tm3+,Yb3+:GdVO4@SiO2 Core-Shell Nanoparticles in HeLa Cells: Upconversion Luminescence Nanothermometry in the First Biological Window and Biolabelling in the Visible

et al. 2020

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The bifunctional possibilities of Tm,Yb:GdVO4@SiO2 core-shell nanoparticles for temperature sensing by using the near-infrared (NIR)-excited upconversion emissions in the first biological window, and biolabeling through the visible emissions they generate, were investigated. The two emission lines located at 700 and 800 nm, that arise from the thermally coupled 3F2,3 and 3H4 energy levels of Tm3+, were used to develop a luminescent thermometer, operating through the Fluorescence Intensity Ratio (FIR) technique, with a very high thermal relative sensitivity. Moreover, since the inert shell surrounding the luminescent active core allows for dispersal of the nanoparticles in water and biological compatible fluids, we investigated the penetration depth that can be realized in biological tissues with their emissions in the NIR range, achieving a value of 0.8 mm when excited at powers of 50 mW. After their internalization in HeLa cells, a low toxicity was observed and the potentiality for biolabelling in the visible range was demonstrated, which facilitated the identification of the location of the nanoparticles inside the cells, and the temperature determination.

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Thermochromic upconversion nanoparticles for visual temperature sensors with high thermal, spatial and temporal resolution

Abstract: A luminescent thermometer changing from blue to red as temperature increases and based on Yb3+,Tm3+:GdVO4@SiO2 nanoparticles excited at 980 nm is presented.

Cited by 65 publications

References 52 publications

Multistimuli Response Micro‐ and Nanolayers of a Coordination Polymer Based on Cu₂I₂ Chains Linked by 2‐Aminopyrazine

Multistimuli Response Micro‐ and Nanolayers of a Coordination Polymer Based on Cu₂I₂ Chains Linked by 2‐Aminopyrazine

Real-time micro-scale temperature imaging at low cost based on fluorescent intensity ratio

Bifunctional Tm3+,Yb3+:GdVO4@SiO2 Core-Shell Nanoparticles in HeLa Cells: Upconversion Luminescence Nanothermometry in the First Biological Window and Biolabelling in the Visible

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Thermochromic upconversion nanoparticles for visual temperature sensors with high thermal, spatial and temporal resolution

Abstract: A luminescent thermometer changing from blue to red as temperature increases and based on Yb3+,Tm3+:GdVO4@SiO2 nanoparticles excited at 980 nm is presented.

Cited by 65 publications

References 52 publications

Multistimuli Response Micro‐ and Nanolayers of a Coordination Polymer Based on Cu2I2 Chains Linked by 2‐Aminopyrazine

Multistimuli Response Micro‐ and Nanolayers of a Coordination Polymer Based on Cu2I2 Chains Linked by 2‐Aminopyrazine

Real-time micro-scale temperature imaging at low cost based on fluorescent intensity ratio

Bifunctional Tm3+,Yb3+:GdVO4@SiO2 Core-Shell Nanoparticles in HeLa Cells: Upconversion Luminescence Nanothermometry in the First Biological Window and Biolabelling in the Visible

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Multistimuli Response Micro‐ and Nanolayers of a Coordination Polymer Based on Cu₂I₂ Chains Linked by 2‐Aminopyrazine

Multistimuli Response Micro‐ and Nanolayers of a Coordination Polymer Based on Cu₂I₂ Chains Linked by 2‐Aminopyrazine