Near-infrared luminescence from double-perovskite Sr&lt;sub&gt;3&lt;/sub&gt;Sn&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;7&lt;/sub&gt;:Nd&lt;sup&gt;3+&lt;/sup&gt;: A new class of probe for in vivo imaging in the second optical window of biological tissue

Kamimura, Sunao; Xu, Chao‐Nan; Yamada, Hiroshi; Marriott, Gerard; Hyodo, Koji; Ohno, Teruhisa

doi:10.2109/jcersj2.17051

Cited by 29 publications

(16 citation statements)

References 21 publications

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“…[100] T -and [010] T -axes (α ≠ β). 49 The phase transition Pccn→Bmab at 420 K in Sr 2 SnO 4 structure is well consistent with the neutron diffraction studies carried by Fu et al 13 However, the second phase transition Bmab→I4/mmm may occur at lower temperature of 480-500 K, comparing with Fu et al results at 573 K. Such inaccuracy may be a result of large gap between two measured temperature points (473-573 K).…”

Section: -supporting

confidence: 87%

Temperature-Induced Structural Transformations in Undoped and Eu³⁺-Doped Ruddlesden–Popper Phases Sr₂SnO₄ and Sr₃Sn₂O₇: Relation to the Impedance and Luminescence Behaviors

Stanulis

Katelnikovas²,

Salak

et al. 2019

Inorg. Chem.

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We report that luminescence of Eu 3+ ion incorporated into Ruddlesden-Popper phases allows monitoring phase transition in powders (instead of single crystals), in a time efficient manner (compared to neutron diffraction), and importantly, with greater sensitivity than previous methods. Crystal structure and dielectric response of undoped and 0.5%Eu 3+-doped Sr 3 Sn 2 O 7 ceramics were studied as a function of temperature over the temperature range of 300-800 K. The luminescence studies of 0.5%Eu 3+-doped Sr 2 SnO 4 and Sr 3 Sn 2 O 7 samples were performed in the temperature range of 80-500 K. These results were compared with the respective dependences for the undoped compounds. The structural transformations in 0.5%Eu 3+-doped Sr 3 Sn 2 O 7 were found at 390 and 740 K. The former is associated with the isostructural atomic rearrangement resulted in a negative thermal expansion along two of three orthorhombic crystallographic axes, while the latter corresponds to the structural transition from the orthorhombic Amam phase to the tetragonal I4/mmm one. A similar temperature behavior with the structural transformations in the same temperature ranges was observed in undoped Sr 3 Sn 2 O 7 , although the values of lattice parameters of the Eu 3+-doped and undoped compounds were found to be slightly different 2 indicating an incorporation of europium in the crystal lattice A dielectric anomaly associated with a structural phase transition was observed in Sr 3 Sn 2 O 7 at 390 K. Optical measurements carried out over a wide temperature range demonstrated a clear correlation between structural transformations in Eu 3+doped Sr 2 SnO 4 and Sr 3 Sn 2 O 7 and the temperature anomalies of their luminescence spectra; suggesting the efficacy of this method for the determination of subtle phase transformations.

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Section: -supporting

confidence: 87%

Temperature-Induced Structural Transformations in Undoped and Eu³⁺-Doped Ruddlesden–Popper Phases Sr₂SnO₄ and Sr₃Sn₂O₇: Relation to the Impedance and Luminescence Behaviors

Stanulis

Katelnikovas²,

Salak

et al. 2019

Inorg. Chem.

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“…When Nd 3+ content is 0.2 mol%, ML emission spectrum first appears, which consists of two emission bands of 700‐850 nm and 850‐1000 nm. The 850‐1000 nm emission band comes from the transition ( 4 F 3/2 → 4 I 9/2 ) of Nd 3+ ions, and the host Sr 3 Sn 2 O 7 is responsible for the 700‐800 nm emission band, since the blank sample shows similar photo‐emission as Figures illustrates. When the Nd 3+ content increases to 0.5 mol%, the ML intensity of host begins to decrease.…”

Section: Resultsmentioning

confidence: 77%

Near infrared mechanoluminescence from Sr₃Sn₂O₇: Nd³⁺for in situ biomechanical sensor and dynamic pressure mapping

et al. 2019

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Mechanoluminescence (ML) is a phenomenon upon external mechanical stimuli and it has found diverse applications such as stress sensing, structure health diagnosis, 3‐D signature, energy harvesting etc because of its unique properties of in situ and real‐time response to the stimuli. However, ML of most of the state‐of‐art phosphors primarily appears within the spectral range from ultraviolet to visible, which does not lie in the biological transparent windows, and, therefore, limits its applications in biological field. Here, we report a strong near infrared (NIR) ML from orthorhombic Cmcm perovskite Sr3Sn2O7: Nd3+, which is peaked at ~ 900 nm and located exactly within the first optical transparent window of tissues. The ML apparates after gradual discharge of the traps deeper than 0.73 eV triggered by the external mechanical stimuli and subsequently excitation of Nd3+ to the state of 4F3/2. The rechargable ML presents well repeatable linearity to loaded force at least up to 5000 N, and it can penetrate tissues easily that are thick up to 30 mm such as pigskin and the ceramic disk of hydroxy apatite which is the main constituent of bone. These results demonstrate the potential application for in situ biomechanical sensor. Meanwhile, by recording and processing these ML signals during signing on a pellet sample, for the first time, we provide a novel signature system based on NIR ML. This could raise the security level of existed signature anti‐countering to a higher level.

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“…Moreover, it has been shown that the NIR ML of Nd 3+ -doped materials include line emissions in the second optical window of biological tissue (NIR2, as shown in Fig. 67) [124,125,368,369]. The ability to generate NIR light from ML materials using ultrasound excitation [23,102,174,326], coupled with the greater transmission of NIR photons through living tissue could lead to exciting developments in medicine, including high-contrast in vivo imaging of tumors and other diseased states.…”

Section: Nir-ml Imagingmentioning

confidence: 99%

Trap-controlled mechanoluminescent materials

Zhang

Wang

Marriott

et al. 2019

Progress in Materials Science

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282

196

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Mechanoluminescence (ML) is generated during exposures of certain materials to mechanical stimuli. Many solid materials produce ML during their fracturing, however, the irreversibility of fracto-induced ML limits the practical applications of these materials. In 1999, Chao-Nan Xu discovered an intense and reproducible ML from trap-controlled materials, including ZnS:Mn 2+ and SrAl 2 O 4 :Eu 2+ , and introduced the principles and applications of hybrid inorganic/organic mechanoluminescent (ML) composites, and related sensors to visualize stress/strain in target structures. This discovery has triggered intense research interest in trap-controlled ML materials and composites over the past 2 decades. Notable achievements of this research include the development of trap-controlled materials that exhibit bright ML emission from the ultraviolet to the near infra-red, and multiscale mechano-optical sensitivities. This research has also increased our understanding of the mechanisms of ML phenomena, enabling the rational design of trap-controlled ML materials. Practical applications of ML are also being driven by the discovery that ML composites can serve as "mechano-optical sensitive skin" for structural health diagnosis, stress sensors for biomechanics, and mechanically-activated light sources. This review focuses on the design, synthesis, characterization, optimization and application of trap-controlled ML materials, and concludes with discussions on future directions of ML research and specific challenges to improve ML materials for real-world applications.

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Near-infrared luminescence from double-perovskite Sr<sub>3</sub>Sn<sub>2</sub>O<sub>7</sub>:Nd<sup>3+</sup>: A new class of probe for in vivo imaging in the second optical window of biological tissue

Cited by 29 publications

References 21 publications

Temperature-Induced Structural Transformations in Undoped and Eu³⁺-Doped Ruddlesden–Popper Phases Sr₂SnO₄ and Sr₃Sn₂O₇: Relation to the Impedance and Luminescence Behaviors

Temperature-Induced Structural Transformations in Undoped and Eu³⁺-Doped Ruddlesden–Popper Phases Sr₂SnO₄ and Sr₃Sn₂O₇: Relation to the Impedance and Luminescence Behaviors

Near infrared mechanoluminescence from Sr₃Sn₂O₇: Nd³⁺for in situ biomechanical sensor and dynamic pressure mapping

Trap-controlled mechanoluminescent materials

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Near-infrared luminescence from double-perovskite Sr<sub>3</sub>Sn<sub>2</sub>O<sub>7</sub>:Nd<sup>3+</sup>: A new class of probe for in vivo imaging in the second optical window of biological tissue

Cited by 29 publications

References 21 publications

Temperature-Induced Structural Transformations in Undoped and Eu3+-Doped Ruddlesden–Popper Phases Sr2SnO4 and Sr3Sn2O7: Relation to the Impedance and Luminescence Behaviors

Temperature-Induced Structural Transformations in Undoped and Eu3+-Doped Ruddlesden–Popper Phases Sr2SnO4 and Sr3Sn2O7: Relation to the Impedance and Luminescence Behaviors

Near infrared mechanoluminescence from Sr3Sn2O7: Nd3+for in situ biomechanical sensor and dynamic pressure mapping

Trap-controlled mechanoluminescent materials

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Temperature-Induced Structural Transformations in Undoped and Eu³⁺-Doped Ruddlesden–Popper Phases Sr₂SnO₄ and Sr₃Sn₂O₇: Relation to the Impedance and Luminescence Behaviors

Temperature-Induced Structural Transformations in Undoped and Eu³⁺-Doped Ruddlesden–Popper Phases Sr₂SnO₄ and Sr₃Sn₂O₇: Relation to the Impedance and Luminescence Behaviors

Near infrared mechanoluminescence from Sr₃Sn₂O₇: Nd³⁺for in situ biomechanical sensor and dynamic pressure mapping