Nanoscale
·
2025
·
IF 5.1
Dong Zhu,Chunfeng Wang,Fuhang Jiao,Jiujun Xu,Haoran Xu,Shun Han,Peijiang Cao,Yuxiang Zeng,Ming Fang,Wenjun Liu,Deliang Zhu,Youming Lu
Optical physical unclonable functions (PUFs) are powerful tools to combat counterfeiting, owing to their unpredictable preparation processes and unique, identifiable information content. Achieving high entropy and robustness in optical PUFs is essential for practical applications but remains challenging. This study demonstrates a multilevel, solar-blind, and thermostable PUF based on host-sensitized luminescence of trivalent dysprosium (Dy3+) in β-phase gallium oxide (β-Ga2O3). The controllable occupation of Dy3+ in both tetrahedral and octahedral Ga3+ sites of β-Ga2O3 results in heterochromatic optical emission, which affords the resulting PUFs with a multilevel encoding capacity of 44096 at 64 × 64 pixels. The wide bandgap (∼4.6 eV) of β-Ga2O3:Dy3+ confines the PUF response to solar-blind irradiation, encompassing a light spectrum in the range 230–270 nm, which does not overlap with ambient light, ensuring interference-free stimulation and therefore achieving 100% recognition accuracy. Additionally, the high thermal quenching activation energy (0.386 eV) of β-Ga2O3:Dy3+ provides thermal stability, enabling the PUFs to operate from room temperature up to 125 °C. With near-ideal uniformity, uniqueness, and reproducibility, these PUFs hold considerable promise for practical applications in anticounterfeiting and encryption.
研究领域:
材料科学
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光学工程
·
信息安全
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Xiaoyan Wang,Yu Yuan,Jingru Lai,Xiaoli Shi,Mingye Ding
Solar-driven water splitting for hydrogen production is a pivotal technique for sustainable energy conversion. However, its efficiency is constrained by intermittent solar irradiation and rapid charge recombination. To overcome these limitations, designing a round-the-clock photocatalyst with high charge storage capacity that can still operate effectively under low light flux after sunset and promote charge carrier separation is a promising strategy. Herein, by selecting SrAl 2 O 4 :Eu 2+ /Dy 3+ persistent phosphors as electron-trapped centers and g-C 3 N 4 semiconductor as visible-light photocatalyst, SrAl 2 O 4 :Eu 2+ /Dy 3+ @g-C 3 N 4 composite has been successfully synthesized via in-situ growth strategy to form a conventional type II heterojunction photocatalyst. Benefiting from the excellent ability of charge storage and release from electron traps and the improved electron-hole separation efficiency, the designed round-the-clock photocatalyst exhibits the improved hydrogen production from 153.8 μmol g −1 h −1 to 560 μmol g −1 h −1 under visible-light irradiation, infrared-light-driven H 2 production of 932 μmol g −1 for 3 h and a dark activity of 269.1 μmol g −1 h −1 lasing for 0.5 h. This work provides a promising strategy for designing a highly efficient photocatalyst for wide-spectral-responsive and all-weather photocatalytic hydrogen production.
研究领域:
材料科学
·
能源化学
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产品关联
DOI
高影响因子
DYES AND PIGMENTS
·
2025
·
IF 4.2
Jiaxiang Liu,Yanan Guo,Qian Zhang,Huizhe Niu,Da Li,Zhenhao Xu,Wentao Li,Yuzhen Zhao,Zongcheng Miao
Circularly polarized luminescence (CPL) in weakly emissive organo-Dy 3+ complexes has been largely unexplored. The energy gap between the Dy 3+ excited 4 F 9/2 -emitting state and adjacent 6 F 1/2 state is extremely narrow. In order to address this challenge, we have adopted a heteroleptic molecular strategy to construct a pair of novel chiral binary coumarin-based Dy 3+ enantiomers: [Dy(Coum) 3 ( R , R - i pr-PyBox)] ( 2 ) and [Dy(Coum) 3 ( S , S - i pr-PyBox)] ( 5 ), where Coum = 3-acetyl-4-hydroxy-coumarin and R , R / S , S - i pr-PyBox = 2,6-bis(( R / S )-4-isopropyl-4,5-dihydrooxazol-2-yl)pyridine. A synergistic integration of the coumarin-derived Coum ligand with high-efficiency sensitization and light-harvesting capabilities and the CPL-induced bis(oxazoline) Chiral- i pr-PyBox derivatives resulted in complexes 2 and 5 exhibiting intense high-purity yellow light ( Φ PL = 18–19 %) with intense CPL signals (| g lum | = 0.017–0.090). This approach has enabled an effective trade-off with respect to quantum efficiency and degree of polarization. An integrated superior CPL brightness ( B CPL ; 22.2–46.9 M −1 cm −1 ) has been established for the two Dy 3+ enantiomers across multiple 4 F 9/2 → 6 H J/2 transitions (J = 15, 13 and 11). The findings of this study have demonstrated the viability of the binary molecular design strategy in developing high-performance chiroptical organo-Dy 3+ luminophores.
研究领域:
无机化学
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材料科学
·
光学材料
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发光
·
配位化学
·
手性光学性质
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DOI
高影响因子
DALTON TRANSACTIONS
·
2020
·Vol. 49
·期 22
·7397-7405
·
IF 4.174
Jie Chen,Yixin Gao,Haifeng Jiang,Yan Liu,Zhaohui Jin
Optimizing structure and varying doped ions are two main strategies to obtain excellent luminescence performance. Spherical morphology is considered to be the most ideal phosphor structure due to the least surface defects. Herein, a series of spherical and monodispersed Dy3+/Eu3+ co-activated SiO2@Gd2O3 core–shell phosphors with multicolor tunable luminescence were successfully prepared via a facile urea assisted precipitation method. Related chemical reactions and the possible growth mechanism of Gd2O3:Ln3+ directional deposition on the surface of SiO2 microspheres were put forward. Upon 273 nm UV radiation excitation, SiO2@Gd2O3:Dy3+ and SiO2@Gd2O3:Eu3+ samples exhibited characteristic yellow (4F9/2–6H13/2) and blue (4F9/2–6H15/2) emissions of Dy3+ and red (5D0–7F2) emission of Eu3+, respectively. Meanwhile, multicolor emissions (warm white, yellow and orange) could be easily obtained by modulating the relative content of Dy3+ and Eu3+ in SiO2@Gd2O3:Ln3+ samples under a single excitation wavelength. Moreover, it was confirmed that Dy3+ could transfer energy to Eu3+ in the form of quadrupole–quadrupole interaction and further improved the luminescence intensity of Eu3+ by comparing experimental data with theoretical calculations. These results imply that tunable luminescence Dy3+,Eu3+ co-doped SiO2@Gd2O3 microspheres have great potential applications in multicolor displays and biolabeling fields.
研究领域:
材料科学
·
光学
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DOI
高影响因子
ACS Applied Optical Materials
·
2024
·
IF 0
Haitang Hu,Miaomiao Wang,Shoujun Ding,Chuancheng Zhang,Hao Ren,Yong Zou,Wenpeng Liu
Rare earth ion-doped luminescent materials exhibit significant potential for application in visible solid-state laser and anticounterfeiting applications. The Czochralski method was employed to successfully synthesize high-quality Dy3+, Eu3+ codoped Gd3Sc2Al3O12 (GSAG), and Gd2.79Y0.21Sc2Al3O12 (GYSAG) single crystals. Comprehensive studies were conducted on their structural and physicochemical properties, luminescence properties, and fluorescence lifetime. The Dy,Eu:GSAG and Dy,Eu:GYSAG crystals both display favorable thermal conductivity values of 5.56 and 5.43 W m–1 K–1, respectively, along with commendable hardness properties of 7.241 and 7.247 kg/mm2. The emission color of the Dy,Eu:G(Y)SAG crystals can be adjusted from white light under a 355 nm excitation to orange-red light under a 405 nm excitation and bright yellow light under a 450 nm excitation. Additionally, the maximum stimulated emission cross-section for both crystals was calculated under various wavelength laser excitations. The fluorescence lifetime of the crystals at the 4F9/2 level (Dy3+) and the 5D0 level (Eu3+) was also examined. Notably, the fluorescence quantum efficiencies at the 4F9/2 level in Dy,Eu:GSAG and Dy,Eu:GYSAG were measured to be impressive at 91.3 and 92.7%, respectively. The mechanism of resonance energy transfer between Dy3+ and Eu3+ was analyzed, indicating promising applications of Dy,Eu:G(Y)SAG in visible solid-state lasers and multimode anticounterfeiting.
研究领域:
材料科学
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光学
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物理化学
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DOI
Nanomaterials
·
2023
·Vol. 13
·期 9
·1558
·
IF 5.3
Qianyi Chen,Minbo Wu,Puxian Xiong,Yajing Zhao,Shuhang Tian,Yao Xiao,Yongsheng Sun,Dongdan Chen,Shanhui Xu,Zhongmin Yang
Yellow lasers are of great interest in biology, medicine and display technology. However, nonlinear emission of near-infrared lasers at yellow still presents particularly complex optical alignment to date. Here, to the best of our knowledge, we demonstrate the fabrication of a NaLa(WO4)2: Dy3+glass-ceramic fiber (GCF) for the first time. More importantly, the emission band of the GCF, which is around 575 nm, has a wide full-width half maximum (FWHM) of 18~22 nm, which is remarkably larger than that of the Dy3+-doped YAG crystal (<7 nm). The precursor fiber (PF) was drawn using the molten core drawing (MCD) method. In particular, benefiting from the in situ nanocrystals fabricated in the amorphous fiber core after thermal treatment, the resultant glass-ceramic fiber exhibits a five-times enhancement of luminescence intensity around 575 nm, compared with the precursor fiber, while retaining its broadband emission. Overall, this work is anticipated to offer a high potential GCF with prominent bandwidth for the direct access of a tunable yellow laser.Keywords:glass-ceramic fiber;broadband;yellow emission
研究领域:
光学
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材料科学
·
激光技术
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2021
·Vol. 32
·期 11
·14932-14943
·
IF 2.478
Deng Huawei,Liu Jun,Zhang Hang,Li Chaorui,Liu Zhen,Chen Dihu
Multimodal imaging has attracted tremendous attention in biotechnology and nanomedicine applications. Monoclinic Gd 2 O 3 :Dy 3+ nanoparticles (NPs) with dual-color fluorescence imaging (FI) and magnetic resonance imaging (MRI) have been successfully synthesized by employing laser ablation in liquid (LAL) technique. The synthesized nanoparticles can be used as yellow fluorescence nanoprobe as well as blue ones due to their sharp and strong yellow and blue emissions. Magnetic resonance imaging (MRI) measurement shows that the longitudinal relaxivity (r 1 ) of the Gd 2 O 3 :1%Dy 3+ NPs is 4.5 times higher than that of the commercial Gd-DTPA. The experiment of in vitro cell fluorescence imaging and magnetic resonance imaging of female Balb/c mouse indicates that the Gd 2 O 3 :Dy 3+ NPs synthesized by LAL technique are promising candidates of dual-color FI nanoprobe and MRI contrast agent in further clinical applications.
研究领域:
生物技术
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纳米医学
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材料科学
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医学成像
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2021
·Vol. 32
·期 24
·28077-28087
·
IF 2.478
Zhao Jiaqi,Hu Chen,Lu Jingyao,Sun Ruyi,Wang Zhen,Yin Yanzhen,Liu Wenlong,Gu Chengcheng,Li Zichao,Zhong Degao,Teng Bing
A series of single-phase white-emitting phosphors Ba 3 Bi(PO 4 ) 3 (BBP):8 at.% Dy, x at.% Eu were successfully synthesized through high temperature solid-phase method. The luminescence properties of BBP:8 at.% Dy, x at.% Eu were systematically investigated. Experimental results indicate the doping of Eu 3+ ions can effectively compensate the red light component in the emission spectrum and tune the correlated color temperature of BBP:8 at.% Dy, x at.% Eu from cool white light (5097 K) to warm white light (3661 K). Moreover, BBP:8 at.% Dy 3+ , 0.8 at.% Eu 3+ phosphor exhibits excellent thermal stability and the fluorescence intensity at 150 °C can still maintain 76% of that at 25 °C, while the activation energy is determined to be ~ 0.23 eV. In addition, the quantum efficiency of BBP:8 at.% Dy 3+ , 0.8 at.% Eu 3+ phosphor were measured to be 61%. These results suggest that BBP:8 at.% Dy 3+ , 0.8 at.% Eu 3+ can be a NUV-pumped single-phase white phosphors with excellent comprehensive performances.
研究领域:
材料科学
·
发光材料
·
无机化学
·
光学材料
·
固体化学
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Kangliang Peng,Huiqing Xu,Xueqing Yang,Lin Chen,Lifang Chen
The exploitation of phosphors with tunable color emissions is of great significance in the field of display and lighting. Herein, a series of Eu 3+ /Dy 3+ /Eu 2+ ions single-/multiple-doped NaMgPO 4 phosphors have been successfully synthesized via a high-temperature solid-state reaction method. The luminescence properties of the synthesized NaMgPO 4 phosphors were systematically investigated. The incorporation of Dy 3+ enables the tuning of emission peaks in NaMgPO 4 :Eu 3+ phosphors through an efficient energy transfer (ET) process from Eu 3+ to Dy 3+ , thereby facilitating white light emission in a single-composition phosphor. Eu 3+ and Eu 2+ co-activated NaMgPO 4 phosphors were achieved by controlling the reduction of Eu 3+ to Eu 2+ under a reducing atmosphere generated by activated carbon. Photoluminescence (PL) spectra revealed simultaneous blue emission from Eu 2+ and red emission from Eu 3+ . By varying the amount of activated carbon, tunable emission colors can be realized in the Eu 3+ /Eu 2+ codoped NaMgPO 4 phosphors. Consequently, through the strategic design of rare-earth ion codoping, the Eu 3+ /Dy 3+ /Eu 2+ ions single-/multiple-doped NaMgPO 4 phosphors exhibit promising practical applications in phosphor-converted white light-emitting diodes (LEDs).
研究领域:
材料科学
·
发光材料
·
光电子学
·
固态化学
·
照明技术
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产品关联
DOI
高影响因子
Heliyon
·
2022
·
IF 3.776
Hao Song,Xiuping Wu,Yanjie Zhang,Shichang Xu,Bing Li
Deep-trap luminescent materials have attracted great attention for optical information storage applications. However, the flexible luminescence films based on red luminescence materials with temperature and infrared response are scarce. In this study, we have successfully developed various novel flexible red emitting films based on Eu 2+ /Dy 3+ co-doped Sr 2 Si 5 N 8 phosphors through screen-printing and spin-coating technologies, respectively. Interestingly, the fabricated flexible luminescence films exhibit unique temperature and infrared responsive properties for optical information storage by releasing photons in response to thermal or infrared stimulation. Notably, deep-trap red emitting Eu 2+ /Dy 3+ co-doped Sr 2 Si 5 N 8 phosphors are crucial for the optical information storage properties of the films. Two emission peaks of Sr 2 Si 5 N 8 :Dy 3+ phosphors at 476 nm and 577 nm are observed under excitation at 345 nm, corresponding to the radiative transition occurs from the 4 F 9/2 level to the 6 H 13/2 and 6 H 15/2 levels of Dy 3+ . When Dy 3+ and Eu 2+ ions are co-doped in Sr 2 Si 5 N 8 , the energy transfer from Dy 3+ to Eu 2+ in Sr 2 Si 5 N 8 matrix is found and the decay time confirms that Dy 3+ ions can be acted as deep trap centers to storage photons. For Sr 2 Si 5 N 8 :Eu 2+ ,Dy 3+ phosphors and the corresponding flexible luminescence films, the specific patterns (for example apple and note patterns) are firstly recorded under NUV or blue light excitation and then reappear through thermal stimulation or near-infrared photo-stimulation (980 nm laser). This work not only validates the feasibility of Sr 2 Si 5 N 8 :Eu 2+ ,Dy 3+ phosphors as deep-trap red emitting luminescence materials, but also suggests the applications of flexible luminescence films for optical information storage.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2022
·
IF 4.171
Chuandong Zuo,Wei Tang,Chaoyang Ma,Chen Chang,Kaifu Fan,Yingkui Li,Xuanyi Yuan,Zicheng Wen,Yongge Cao
Inorganic photochromic (PC) materials are increasingly being considered potential candidates for security and optical storage applications. Although great progress has been made in inorganic photochromic materials, it is still challenging to reach both strong photochromic efficiency and large luminescence modulation in inorganic materials . In this work, an effective method is proposed to simultaneously achieve strong photochromic efficiency and large luminescence modulation in ferroelectric oxides BaMg 0·28 Zr 0·16 Ta 0·56 O 3 : Dy 3+ (BZMT: Dy 3+ ) via inducing a large number of oxygen vacancies . The obtained BZMT: Dy 3+ ceramics exhibits a reversible white-black color change (∼59.5%) upon alternating illumination at 365 nm and 450 nm (or thermal stimulus 300 °C). Meanwhile, a large luminescence modulation (∼87.6%) had been achieved in BZMT: Dy 3+ due to the well overlap between the absorb peak of BZMT and the emission peaks of Dy 3+ . Benefiting from these excellent properties, the obtained BZMT: Dy 3+ ceramics can be used as electronic devices, security, and information storage multifunctional materials. Moreover, this study provides an effective method for developing other inorganic photochromic materials.
研究领域:
材料科学
·
光学
·
陶瓷
·
光化学
·
安全技术
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产品关联
DOI
高影响因子
CHEMOSPHERE
·
2025
·
IF 8.1
Si-yuan He,Wei Wen,Peng Wu,Zhe Meng
Developing a green and efficient technology for decomposing aflatoxin B 1 (AFB 1 ) and ochratoxin A (OTA) in grains has important theoretical value and application prospects for ensuring food safety. A dual Z-scheme ternary heterojunction photocatalyst, Sr 2 MgSi 2 O 7 :Eu 2+ ,Dy 3+ /BiVO 4 /NH 2 -UiO-66 (SBN), was prepared via a self-assembling hydrothermal approach. The SBN heterojunction photocatalyst exhibits round-the-clock photocatalytic activity due to the intrinsic light source of Sr 2 MgSi 2 O 7 : Eu 2+ , Dy 3+ (SMS). Dual Z-scheme mechanism was proposed and validated through detailed analysis of quenching experiments, ESR spectra, band arrangement, and charge transfer processes. The dual Z-scheme mechanism not only promotes the effective transfer and separation of photo generated charge carriers during charge carrier transport, but also maintains significant reduction and oxidation potentials. SBN photocatalyst exhibits stable and persistent photocatalytic performance, significantly enhancing the degradation efficiency of AFB 1 and OTA under all-weather conditions. Experimental data shows that the removal rate of AFB 1 increased from 69.60 % after 60 min of illumination to 83.9 % after 4 h of turning off the light source; At the same time, the removal rate of OTA increased from 64.8 % to 78.1 %. •O 2 − and •OH were identified as key active species in photocatalytic reactions. Based on the analysis of AFB 1 and OTA degradation intermediates and the prediction of degradation sites using density functional theory (DFT), degradation pathways for AFB 1 and OTA were proposed. Collectively, these findings suggest a highly promising practical approach for the detoxification of mycotoxins in grain commodities.
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产品关联
DOI
PubMed
高影响因子
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