The 1.53μm spectroscopic properties of Er3+/Ce3+/Yb3+ tri-doped tellurite glasses containing silver nanoparticles

Huang, Bin; Zhou, Yaxun; Yang, Fengjing; Wu, Libo; Qi, Yawei; Li, Jun

doi:10.1016/j.optmat.2015.11.004

Cited by 35 publications

(9 citation statements)

References 53 publications

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“…In order to achieve bright NIR-IIb emission, suppression of upconversion emission is important, which can be achieved through reducing the electron numbers in the 4 I 11/2 state and correspondingly enhancing the population of the 4 I 13/2 level. 40 The energy difference of the two energy levels of 2 F 7/2 and 2 F 5/2 of Ce 3+ ions is 2300 cm −1 , which is approximated to the energy spacing between 4 I 11/2 and 4 I 13/2 of Er 3+ ions (3700 cm −1 ). Based on this, the cross relaxation between Ce 3+ ( 2 F 7/2 → 2 F 5/2 ) and Er 3+ ( 4 I 11/2 → 4 I 13/2 ) takes place, leading to the transition of electrons from the 4 I 11/2 to 4 I 13/2 level by nonradiative decay.…”

Section: Resultsmentioning

confidence: 98%

“…Nonetheless, the downshifting emission process is competitive with the upconversion emission process, since they are highly dependent on the intermediate 4 I 11/2 state of Er 3+ . In order to achieve bright NIR-IIb emission, suppression of upconversion emission is important, which can be achieved through reducing the electron numbers in the 4 I 11/2 state and correspondingly enhancing the population of the 4 I 13/2 level . The energy difference of the two energy levels of 2 F 7/2 and 2 F 5/2 of Ce 3+ ions is 2300 cm –1 , which is approximated to the energy spacing between 4 I 11/2 and 4 I 13/2 of Er 3+ ions (3700 cm –1 ).…”

Section: Resultsmentioning

confidence: 99%

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Dye-Sensitized Rare Earth-Doped Nanoparticles with Boosted NIR-IIb Emission for Dynamic Imaging of Vascular Network-Related Disorders

Wang

Liang

et al. 2021

ACS Appl. Mater. Interfaces

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Real-time dynamic vascular network imaging can provide accurate hemodynamic and anatomical information, facilitating the diagnosis of blood circulatory system-related diseases and achieving precise evaluation of therapeutic effects. In vivo luminescence imaging in the NIR-IIb biological window (1500–1700 nm) has developed into a next generation of optical imaging method with significantly improved temporal–spatial resolution and penetration depth. Unfortunately, an imaging contrast agent capable of emitting NIR-IIb luminescence with sufficient brightness in this region is lacking. Herein, we designed and proposed a type of dye-sensitized rare earth-doped nanoparticle (RENPs@Alk-pi) with obviously boosted NIR-IIb emission and high biocompatibility, which can be used to realize the real-time NIR-IIb luminescence imaging with high temporal–spatial resolution and contrast. The dye sensitization process provides a 40-fold enhanced brightness of the NIR-IIb emission at 1525 nm of Er3+. Consequently, the RENPs@Alk-pi was not only able to depict a vascular network but also applicable in noninvasively monitoring the dynamic vascular processes and changes in the vascular anatomy of two blood circulatory system-related disorders, including hindlimbs ischemia and atherosclerosis. Our research provides a powerful tool for evaluating vascular network-related dysfunction and physiological processes.

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Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

Dye-Sensitized Rare Earth-Doped Nanoparticles with Boosted NIR-IIb Emission for Dynamic Imaging of Vascular Network-Related Disorders

Wang

Liang

et al. 2021

ACS Appl. Mater. Interfaces

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“…The downshifted 1525 nm emission was mainly attributed to nonradiative decay from the 4 I 11/2 to the 4 I 13/2 level (Figure i). A Ce-doping strategy was adopted to facilitate the downshifting process of the Er ion through enhancing the nonradiative decay of Er 3+ ( 4 I 11/2 → 4 I 13/2 ) by using the cross-relaxation between Er and Ce ions. ,,− All of these characteristics have ensured a bright NIR-IIb emission for further biomedical applications. After the core was coated with an inert shell, the NIR-IIb emission was significantly enhanced by ∼2 times due to the decreased surface quenching effect (Figure j).…”

Section: Results and Discussionmentioning

confidence: 99%

In Vivo High-Resolution Bioimaging of Bone Marrow and Fracture Diagnosis Using Lanthanide Nanoprobes with 1525 nm Emission

Wen

Deng

et al. 2022

Nano Lett.

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Bones play vital roles in human health. Noninvasive visualization of the full extent of bones is highly demanded to evaluate many bone-related diseases. Herein, we report poly (acrylic acid) (PAA)-modified NaLuF4:Yb/Er/Gd/Ce@NaYF4 nanoparticles (PAA-Er) with second near-infrared emission beyond 1500 nm (also referred as NIR-IIb) for high-resolution bone/bone marrow imaging and bone fracture diagnosis. The NIR-IIb optical-guided bone marrow imaging presents a high signal to noise ratio, which is superior to that for imaging in the NIR-II window (1000–1400 nm, NIR-IIa). Importantly, we also investigated the size-dependent accumulation of the nanoparticles and the possible accumulation mechanism of the designed PAA-Er nanoprobes in bone marrow. Due to the high affinity capability of the PAA-Er nanoprobes, a highly sensitive NIR-IIb optical-guided bone fracture diagnosis was successfully achieved. This novel technology paves the way to design lanthanide nanoprobes for NIR-IIb optical-guided high-resolution bone marrow imaging and bone-related disease diagnosis.

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“…It is noted that both the downshifting and UC emitting processes are all highly related to the intermediate 4 I 11/2 state of Er 3+ , presenting a competitive emission process. Therefore, to achieve highly efficient NIR-IIb emission, a suppressed UC emission by decreasing the population of the 4 I 11/2 state and simultaneously increasing the electron numbers in the 4 I 13/2 level are demanded. ,− Fortunately, the energy level difference between the 2 F 5/2 and the 2 F 7/2 state of Ce 3+ is about 2300 cm –1 , which is approximated to the energy level spacing of 4 I 11/2 and 4 I 13/2 (about 3700 cm –1 ) of Er 3+ , enabling phonon-mediated nonradiative decay from the 4 I 11/2 to the 4 I 13/2 level of Er 3+ via the efficient cross relaxation (CR, Figure c) between Er 3+ ( 4 I 11/2 → 4 I 13/2 ) and Ce 3+ ( 2 F 7/2 → 2 F 5/2 ). Moreover, Dai’s group proposed a Ce 3+ doping strategy to boost the 1525 emission in NaYbF 4 -based core/shell nanoparticles for high temporal resolution brain vessel imaging.…”

Section: Resultsmentioning

confidence: 99%

Non-Invasive Optical Guided Tumor Metastasis/Vessel Imaging by Using Lanthanide Nanoprobe with Enhanced Down-Shifting Emission beyond 1500 nm

2019

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Visualization of tumor vessels/metastasis and cerebrovascular architecture is vitally important for analyzing pathological states of brain diseases and a tumor's abnormal blood vessels to improve cancer diagnoses. In vivo fluorescence imaging using second near-infrared emission beyond 1500 nm (NIR-IIb) has emerged as a next generation optical imaging method with significant improvement in imaging sensitivity and spatial resolution. Unfortunately, a highly biocompatible probe capable of generating NIR-IIb emission with sufficient brightness and uniformed size is still scarce. Here, we have proposed the poly(acrylic acid) (PAA)-modified NaLnF 4 :40Gd/20Yb/2Er nanorods (Ln = Y, Yb, Lu, PAA-Ln-NRs) with enhanced downshifting NIR-IIb emission, high quantum yield (QY), relatively narrow bandwidth (∼160 nm), and high biocompatibility via Ce 3+ doping for high performance NIR-IIb bioimaging. The downshifting emission beyond 1500 nm is improved by 1.75−2.2 times with simultaneously suppressing the upconversion (UC) path in Y, Yb, and Lu hosts via Ce 3+ doping. Moreover, compared with the traditionally used Ybased host, the QY of NIR-IIb emission in the Lu-based probe in water is improved from 2.2% to 3.6%. The explored bright NIR-IIb emitted PAA-Lu-NRs were used for high sensitivity small tumor (∼4 mm)/metastatic tiny tumor detection (∼3 mm), tumor vessel visualization with high spatial resolution (41 μm), and brain vessel imaging. Therefore, our findings open up the opportunity of utilizing the lanthanide based NIR-IIb probe with bright 1525 nm emission for in vivo optical-guided tumor vessel/metastasis and noninvasive brain vascular imaging.

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The 1.53μm spectroscopic properties of Er3+/Ce3+/Yb3+ tri-doped tellurite glasses containing silver nanoparticles

Cited by 35 publications

References 53 publications

Dye-Sensitized Rare Earth-Doped Nanoparticles with Boosted NIR-IIb Emission for Dynamic Imaging of Vascular Network-Related Disorders

Dye-Sensitized Rare Earth-Doped Nanoparticles with Boosted NIR-IIb Emission for Dynamic Imaging of Vascular Network-Related Disorders

In Vivo High-Resolution Bioimaging of Bone Marrow and Fracture Diagnosis Using Lanthanide Nanoprobes with 1525 nm Emission

Non-Invasive Optical Guided Tumor Metastasis/Vessel Imaging by Using Lanthanide Nanoprobe with Enhanced Down-Shifting Emission beyond 1500 nm

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