Small
·
2021
·Vol. 17
·期 20
·2100137
·
IF 13.281
Ping Chen,Zexin Li,Dongyan Li,Lejing Pi,Xitao Liu,Junhua Luo,Xing Zhou,Tianyou Zhai
High color purity and color rendition of 2D luminescent materials have long been pursued for applications in low-dimensional lighting, display, biolabeling, and laser. However, the reported photoluminescence (PL) linewidth of most 2D luminescent materials is about dozens of meV. Herein, a brand-new luminescent system of 2D rare earth (RE) material EuOCl (1.1 nm) with ultra-narrow linewidth (1.2 meV) at room temperature is successfully synthesized via chemical vapor deposition (CVD). The linewidth of EuOCl flakes at room temperature is even narrower than most 2D luminescent materials and heterostructures detected at below 10 K. Impressively, the as-synthesized EuOCl flakes show abnormal temperature-dependent photoluminescent properties, which is absolutely different from the relatively stable 4f–4f transitions in RE owing to shielding from outer shell electrons. J-mixing effect has been successfully applied for this phenomenon. Undoubtedly, luminescent 2D EuOCl flakes will open new territory for the applications of 2D RE materials in the 2D luminescent areas, especially for the applications at room temperature.
研究领域:
材料科学
·
光学
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DOI
高影响因子
Advanced Optical Materials
·
2021
·Vol. 10
·期 5
·2102512
·
IF 9.926
Ping Chen,Xin Feng,Dongyan Li,Lejing Pi,Zexin Li,Xiang Xu,Haoyun Wang,Xing Zhou,Tianyou Zhai
Light manipulation has promoted applications in all-optical processing. 2D anisotropic rare earth (RE) materials are promising for light modulation to realize information transmission and encryption due to the unique optical behaviors of RE ions. Here, image transmission and encryption have been realized by using 2D anisotropic RE material Eu 2 O 3 . The polarized photoluminescence (PL) of Eu 2 O 3 has been innovatively applied for information transmission by switching the on/off states. The opposite two modes of polarization-dependent PL have been applied to grayscale-resolved image transmission and encryption with high security. This novel approach, polarization manipulation on the PL of 2D anisotropic RE materials, will shed light on the development of information processing, all-optical switch, and all-optical computation.
研究领域:
光学
·
材料科学
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信息处理
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2022
·Vol. 33
·期 5
·2607-2618
·
IF 2.779
Gao Zhihua,Fu Fengyan,Niu Lili,Jin M.
In the recent years, luminescent phosphor materials have contributed much to reduce the serious environmental problems such as environmental pollution, greenhouse effect, and energy crisis, but most of them commercially used for fabricating white LEDs are rare earth (RE) ions doped materials. Here, the non-RE Bi 3+ -doped Ba 2 (Y,Sc)NbO 6 solid solution nanocrystals are prepared using a high temperature solid state route followed by a ball milling and griddle selection. Our experiments show that when the Y 3+ ions are replaced by the Sc 3+ ions, the obtained solid solution nanocrystals show a shift of X-ray reflection positions to higher angle, and the emission peaks from blue to blue-green. At the same time, a 1.35 time of PL intensity enhancement under 365 nm excitation is achieved in the Ba 2 (Y 0.58 ,Sc 0.4 )NbO 6 :0.02Bi sample when compared to the Ba 2 Y 0.98 NbO 6 :0.02Bi sample. In addition, this optimal sample shows the quantum efficiency of 76% and good thermal stability with T 50% value of 205 °C. By depositing the Ba 2 (Y 0.58 ,Sc 0.4 )NbO 6 :0.02Bi and commercial red Sr 2 Si 5 N 8 :Eu 2+ phosphors on a 365 nm UV LED chip at a driving current of 30 mA, a white LED device, with a CIE coordinates at (0.364, 0.379), a high color rendering index of 76.8 and luminous efficiency of 67 lm, and a low color temperature of 3469 K, is achieved.
研究领域:
材料科学
·
光学
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产品关联
DOI
高影响因子
Laser & Photonics Reviews
·
2024
·
IF 9.8
Mengyang Lu,Yao Xie,Jiwei Li,Wenting Gu,Lining Sun,Xin Liu
Optical encryption is a potential scheme for information security that exploits abundant degrees of freedom of light to encode information. However, conventional encryption based on fluorescent materials faces challenges in handling complex secret information. Alternatively, single-pixel imaging (SPI) provides a computational modality to solve these problems. In this study, a high-capacity fluorescence encryption scheme, achieved by introducing lanthanide materials and steganography into the encoding and decoding processes of SPI is proposed. Two types of well-designed lanthanide luminescent materials are utilized and excited to generate fluorescence images (fluo-images), which are crucial in this scheme. Various practical experiments using fluo-images as secret keys demonstrate the robustness, effectiveness, and repeatability of this scheme. Furthermore, multi-image experiments indicate the potential of this method to increase secret information capacity. Thus, the proposed fluorescence encryption scheme does provide an efficient computational encryption strategy based on lanthanide luminescent materials for information security, which can improve the security of traditional optical encryption and simultaneously enhance the flexibility of SPI computational decryption.
研究领域:
光学
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材料科学
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计算成像
·
密码学
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产品关联
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2025
·Vol. 108
·期 8
·e20574
·
IF 3.8
Ruifeng Wu,Yafei Liu,Hao Sun,Jianan Xu,Jia Chen,Aimin Chang,Bo Zhang
Tungsten-bronze materials are widely used in the fields of electro-optic, photorefractive, pyroelectric, millimeter-wave, and piezoelectric devices. In particular, tungsten-bronze Ba 4.5 Sm 9 Ti 18 O 54 is believed to be useful for fabricating high-temperature thermistors owing to its semiconductor properties. However, inherent shortcomings such as poor linearity (electrical properties deviate from the Arrhenius equation) and high aging coefficients limit the practical applications of these materials. Incorporating rare-earth ( Re ) ions is an effective means of improving the electrical properties of thermistor materials. In this study, we explore the phase composition and thermosensitive properties of Ba 4.5 Re 9 Ti 18 O 54 (Re = Y, La, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb, and Lu) ceramics with tungsten–bronze structures. The results indicate that the tungsten–bronze phase (Ba 4.5 Re 9 Ti 18 O 54 ) is generated when the radius of the Re 3+ ion exceeds 1.04 Å and the tolerance factor surpasses 0.82. Conversely, a pyrochlore phase (Re 2 Ti 2 O 7 ) accompanied by a monoclinic impurity phase (BaTi 2 O 5 ), is formed. Moreover, all Ba 4.5 Re 9 Ti 18 O 54 ceramics with a tungsten-bronze structure exhibit exceptional linear electrical properties ( R 2 ≥ 999.09‰) and high sensitivity coefficients ( α 1000°C ≥ −0.79%/K). In particular, after aging at 1100°C for 600 h, both the aging coefficient and drift rate of material constant are as low as 5.76% and 1.79%, respectively. These results indicate that Ba 4.5 Re 9 Ti 18 O 54 ceramics are promising for high-temperature and high-accuracy temperature measurements.
研究领域:
材料科学
·
陶瓷
·
固体物理
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热敏电阻技术
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稀土材料
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Xueyu Wang,Qiao Yu,Hang Zhou,Rui Li,Yanqiu Yang,Qingjiang Pan,Songdong Ding
The nitrilotriacetamide n-octyl derivative ligand (NTAamide(n-Oct)) is promising for minor actinide/lanthanide separation, yet periodic trends in its extraction and complexation across the lanthanide series remained unclear. This study systematically investigated its behavior with trivalent rare-earth ions (Ln3+, Y3+, and Sc3+) using solvent extraction, 1H NMR titration, UV–vis spectrophotometric titration, microcalorimetric titration, single-crystal X-ray diffractometry, ESI-MS, and FTIR. Key findings reveal opposing ionic radius dependencies. Solvent extraction showed that extraction efficiency negatively correlates with the ionic radius, decreasing with the ionic radius. Slope analysis indicated Sc3+ forms 1:2 metal–ligand extracted complexes, while other RE3+ ions form 1:1 complexes. Conversely, homogeneous and solid-state studies uniformly identified 1:2 stoichiometry for all RE3+ complexes, with complexation strength positively dependent on the ionic radius, increasing as the ionic radius decreases. Overall, the extraction and complexation ability trends of NTAamide(n-Oct) toward RE3+ exhibit opposing tendencies. Combined with the results of solvent extraction and complexation studies, the compositions of the complexes formed by NTAamide(n-Oct) with Sc3+ or other RE3+ are [ScL2](NO3)3 and [REL2][RE(NO3)6] (L = NTAamide(n-Oct)), respectively. Furthermore, an ion-pair extraction model is also proposed and discussed.
研究领域:
无机化学
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配位化学
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核化学
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分离科学
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稀土材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-10
·
IF 15.7
Zhang Wen,Zheng Wei,Huang Ping,Yang Dengfeng,Shao Zhiqing,Zhang Wei,Zhang Hao,Xie Zhi,Xu Jin,Chen Xueyuan
Yb 3+ /Er 3+ activated upconversion (UC) materials have been widely applied in many advanced technologies owing to their high UC efficiency in the visible region. However, it is challenging to achieve efficient ultraviolet (UV) UC luminescence (UCL) in Yb 3+ /Er 3+ system, due to the dense energy levels of Er 3+ that impose deleterious nonradiative relaxation. Herein, we report a strategy to liberate the UV-UCL of Er 3+ based on the confined energy transfer in Yb 3+ /Er 3+ co-doped 0D Rb 3 InCl 6 with a low phonon energy and a large interionic distance. This facilitates the population of Er 3+ at the 4 G 11/2 state, which yields intense upconverted UV emission at 384 nm, with a much higher UV-to-green ratio ( I 384 / I 554 = 0.864) than that of traditional UC materials ( < 0.1). By leveraging the intense upconverted UV emission of Er 3+ , we demonstrate the application of Rb 3 InCl 6 :Yb 3+ /Er 3+ nanocrystals as a NIR-to-UV transducer for NIR-triggered anion exchange of CsPbX 3 perovskite nanocrystals with high efficiency and good controllability. These findings offer an approach for the exploration of novel UC materials via energy transfer and crystal lattice engineering towards versatile applications.
研究领域:
材料科学
·
光学材料
·
光子学
·
纳米技术
·
固体物理
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稀土材料
·
能量传递
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Libo He,Yongkun Wang,Guoxiang Zhang,Wei Zhao,Lu Zhang,Peipei Li,Chen Su,Zhifeng Wu,Xiaowei Liu
In this work, we report a facile strategy for synthesizing hydrophilic Gd(OH)3 sheets via a Gd-based interfacial precipitation reaction at the interface of organosilane-modified Gd2O3 nanoparticles and a cation exchange resin. This strategy, independent of the specific organosilane used, produces two-dimensional sheets with a distinct lamellar structure and excellent aqueous dispersibility. Characterization confirms the formation of Gd(OH)3 sheets with promising fluorescent and magnetic properties.
研究领域:
无机纳米材料
·
生物医学成像
·
纳米化学
·
功能材料
·
稀土材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Wei Cai,Xinqi Zhang,Jianwei Zheng,Jingwu Zheng,Rongyao Li,Haibo Chen,Liang Qiao,Yao Ying,Wangchang Li,Jing Yu,Juan Li,Shenglei Che
To address the operational safety hazards associated with using high-concentration inorganic phosphoric acid as a surface treatments to enhance the high-temperature oxidation resistance of Nd-Fe-B magnetic powders, this study innovatively proposes an environmentally friendly organic phosphonic acid (methylene diphosphonic acid, MDPA) as an alternative solution. By comparing the effects of inorganic phosphoric acid and MDPA surface treatments on the magnetic properties and thermal stability of magnetic powders, it was found that phosphating-treated samples exhibited slight decrease in coercivity H cj and maximum magnetic energy product (BH) max at room temperature compared to untreated samples. However, at 340 °C, the (BH)max and Hcj of untreated samples dropped sharply by 98.55 % (from 4.97 to 0.07 MGOe) and 92.72 % (from 9.62 to 0.70 kOe), respectively. In contrast, the inorganic phosphate-treated samples showed only a slight decline of 13.55 % (from 4.53 to 3.92 MGOe) and 1.22 % (from 9.39 to 9.28 kOe). The MDPA-treated samples exhibited the best thermal stability, with minimal losses in both (BH)max and Hcj, decreasing by only 6.88 % (from 4.66 to 4.34 MGOe) and 0.69 % (from 9.43 to 9.36 kOe), respectively. Microstructural analysis revealed that the dense metal phosphate conversion layer formed during phosphating was the key to maintaining high-temperature magnetic performance. Specifically, inorganic phosphoric acid treatment preferentially corroded Nd-rich intergranular phases, resulting in a higher Nd content in the conversion layer. In contrast, the iron phosphate salt formed by MDPA treatment dominates the transformation layer, effectively reduces the damage to the microstructure of the magnetic powder. Our research provides a surface treatment solution that combines safety and efficiency for the performance protection of rare-earth magnetic powders in high-temperature injection molding processes.
研究领域:
材料科学
·
表面工程
·
磁学
·
环境化学
·
稀土材料
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHEMISTRY COMMUNICATIONS
·
2023
·
IF 5.4
Guilin Xiang,Cunying Xu,Shuxian Wang,Jianru Li,Wenkang Chen,Daiyun Gu,Qibo zhang,Yixin Hua
The electrodeposition of neodymium was investigated in betaine-ethylene glycol (Bet-EG) deep eutectic solvent (DES) containing neodymium oxide (Nd 2 O 3 ) at different temperatures ranging from 353 K to 373 K. The electrochemical behavior of Nd 2 O 3 dissolved in Bet-EG DES was researched by cyclic voltammetry, potentiodynamic polarization and chronoamperometry methods. Cyclic voltammograms (CVs) manifest that Nd(III) reduction in Bet-EG is an irreversible process with diffusion-controlled, and the reduction overpotential of Nd(III) decreases with the increase of the temperature. The temperature has an impact on the diffusion coefficient of Nd(III) species, obeying the Arrhenius equation. The activation energy is estimated to be 36.78 kJ mol −1 . The cathodic polarization analysis shows that the rise of temperature promotes the reduction of Nd(III). The UV–Vis and ESI-MS analyses show that [Nd 2 (bet) 8 (H 2 O) 4 ] 6+ complex anions are formed as Nd 2 O 3 is dissolved in Bet-EG DES. Electrodeposited neodymium with various morphologies were characterized and analyzed by EDX, XPS, XRD and SEM. It is found that the electrodeposition temperature has a great effect on the morphology of Nd electrodeposits. Depending on the deposition temperature, metallic Nd with submicron particles or porous structures were obtained.
研究领域:
电化学
·
稀土材料
·
材料科学
·
绿色溶剂
·
金属沉积
✓ 已验证
DOI
高影响因子
MATERIALS LETTERS
·
2025
·
IF 2.7
Dinghan Jin,Tingting Yan,Dongyang Xi,Gege Li,Meng Li
This work synthesizes 2D layered K 6 H 4 Nd 2 Ge 6 O 20 via hydrothermal methods. Structural analysis reveals vertex-linked NdO 6 and GeO 4 /GeO 4 H units with interlayer K + and hydrogen bonding, while X-ray photoelectron spectroscopy (XPS) confirms the trivalent state of Nd ions. Correlative microscopy conclusively establish the correspondence between macroscopic lamellar morphology and the c-axis layered framework, with the c-axis dictating crystal growth. The compound exhibits intense Nd 3+ near-infrared (NIR) emission (1064 nm), showcasing potential for photonic applications and advancing rare-earth germanate design principles.
研究领域:
材料科学
·
无机化学
·
光物理
·
稀土材料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2023
·
IF 3.6
Yanting Liu,Yanzhu Wang,Lili Meng,Qi Pang,Hua Yao,Qian Chen,Sidi Ye,Yanting Li,Minyi Zheng
Herein, we successfully obtained Ho 3+ and Ag + -codoped Cs 2 NaBiCl 6 halide double perovskites (DPs) via a hydrothermal method , which exhibit orange-red broadband self-trapped excitons (STE) emission and visible (Vis) and near-infrared (NIR) narrow band emission attributed to Ho 3+ f-f transition, under 360 nm excitation. Compared to the single Ho 3+ -doped sample, the Vis PL intensity of the codoped sample was increased by nearly 13.8 times, and an enhanced photoluminescence quantum yield (PLQY) of 87.45 % was achieved. The PL enhancement is attributed to the partial substituting of Na + with Ag + , leading to an efficient STE emission, and the more energy transition from STE to Ho 3+ . Moreover, the synthesized phosphor exhibits good stability in thermal and atmospheric environments. White light-emitting diode (WLED) is fabricated by employing Cs 2 Na 0·997 Ag 0·003 Bi 0.935 Ho 0.065 Cl 6 on near-ultraviolet (n-UV) LED chips, achieving a color rendering index (CRI) of 95.0 and correlated color temperature (CCT) of 3814 K. Anti-counterfeit patterns and the application for night vision monitoring were also discussed. This study inspires the designing of high-quality phosphors of rare earth-doped DPs and expands the multi-domain luminescence applications of halide DPs.
研究领域:
材料科学
·
光学工程
·
稀土材料
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）