Investigation on photoluminescence properties of MWCNTs@Gd2O3: RE3+ (RE = Eu, Tb, and Tm) hybrid nanocomposites

Mishra, Shikha; Jain, Neha; Pandey, Mukesh Kumar; Pandey, Ashutosh; Srivastava, Alka; Dubey, Ritesh Kumar; Singh, Jai

doi:10.1016/j.jlumin.2022.118803

Cited by 2 publications

(1 citation statement)

References 43 publications

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“…A broad excitation peak appears at 259 nm, which is caused by the 4f 8 ‐4f 7 5d 1 transition of Tb 3+ ions. [ 37 ] The three excitation peaks at 318 nm, 354, and, 371 nm can be assigned to the transitions of Tb 3+ ions from 7 F 6 to 5 D 1 (318 nm), 5 D 2 (354 nm), and 5 D 3 (371 nm), respectively. [ 35 ] In Figure 2D , there are four obvious emission peaks in the photoluminescence spectra of GC samples, which are located at 488 nm ( 5 D 4 ‐ 7 F 6 ), 544 nm ( 5 D 4 ‐ 7 F 5 ), 584 nm ( 5 D 4 ‐ 7 F 4 ), and 621 nm ( 5 D 4 ‐ 7 F 3 ).…”

Section: Resultsmentioning

confidence: 99%

Enabling Broadband Solar‐Blind UV Photodetection by a Rare‐Earth Doped Oxyfluoride Transparent Glass‐Ceramic

Jia,

Zhang,

Niu

et al. 2024

Advanced Science

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Oxyfluoride transparent glass‐ceramics (GC) are widely used as the matrix for rare‐earth (RE) ions due to their unique properties such as low phonon energy, high transmittance, and high solubility for RE ions. Tb3+ doped oxyfluoride glasses exhibit a large absorption cross section for ultraviolet (UV) excitation, high stability, high photoluminescence quantum efficiency, and sensitive spectral conversion characteristics, making them promising candidate materials for use as the spectral converter in UV photodetectors. Herein, a Tb3+ doped oxyfluoride GC is developed by using the melt‐quenching method, and the microstructure and optical properties of the GC sample are carefully investigated. By combining with a Si‐based photo‐resistor,a solar‐blind UV detector is fabricated, which exhibits a significant photoelectric response with a broad detection range from 188 to 400 nm. The results indicate that the designed UV photodetector is of great significance for the development of solar‐blind UV detectors.

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Section: Resultsmentioning

confidence: 99%

Enabling Broadband Solar‐Blind UV Photodetection by a Rare‐Earth Doped Oxyfluoride Transparent Glass‐Ceramic

Jia,

Zhang,

Niu

et al. 2024

Advanced Science

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Multifunctional Mesoporous Hollow Silica Nanorod for Optical Imaging and Drug Delivery

wu,

guan,

et al. 2023

Preprint

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In this work, a multifunctional drug delivery system (DDS) composed of mesoporous hollow silica nanorod core and luminescent Gd2O3:Eu shell (MHSNR@Gd2O3:Eu) was fabricated and applied for optical imaging and drug carrying. The formation process, phase and morphology of the DDS were investigated. The results show that the multifunctional DDS possess uniform core-shell hollow structure, in which the core length of the hollow silica nanorods as approximately 400 nm and a width of approximately 150 nm and the Gd2O3:Eu shell was approximately 30 nm thick. Due to the doping of the Eu3+, the as prepared MHSNR@Gd2O3:Eu emitted bright red light. The in vitro assays with NCI-H460 lung cancer cells domenstrated that the as-obtained MHSNR@Gd2O3:Eu could rapidly and massively enter the cell. Using ibuprofen as a model drug, the release process of the synthesized MHSNR@Gd2O3:Eu was monitored in-vitro. In particular, as the amount of ibuprofen released increases, the photoluminescence intensity of DDS increases. Thus，it is possible to monitor and track the release process through changes in luminous intensity. In summary, it is expected that MHSNR@Gd2O3:Eu may be applied in drug carrying, luminescent tracking and monitoring, and optical imaging. Furthermore, this work provides a reliable approach for the design and preparation of silica/RE2O3 nanocomposite with mesoporous hollow rod-like structures.

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Investigation on photoluminescence properties of MWCNTs@Gd2O3: RE3+ (RE = Eu, Tb, and Tm) hybrid nanocomposites

Cited by 2 publications

References 43 publications

Enabling Broadband Solar‐Blind UV Photodetection by a Rare‐Earth Doped Oxyfluoride Transparent Glass‐Ceramic

Enabling Broadband Solar‐Blind UV Photodetection by a Rare‐Earth Doped Oxyfluoride Transparent Glass‐Ceramic

Multifunctional Mesoporous Hollow Silica Nanorod for Optical Imaging and Drug Delivery

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