Inorganic Chemistry Frontiers
·
2023
·Vol. 10
·期 23
·6869-6878
·
IF 7
Jinmiao Jiao,Conggang Li,Yuheng She,Ning Ye,Zhanggui Hu,Yicheng Wu
Nonlinear optical (NLO) materials currently attract significant interest and hold paramount importance in the optoelectronic field. Nevertheless, the fabrication of NLO crystals capable of transmitting ultraviolet to mid-infrared wavelengths remains a formidable challenge. Herein, we synthesized two novel NLO crystals, namely Cs3REGe3O9 (RE = Y, Gd), by employing a structural gene strategy that harmoniously merges flexible [YO6] and [GdO6] octahedra with rigid [GeO4] motifs. Remarkably, Cs3REGe3O9 (RE = Y, Gd) crystals exhibit substantial band gaps of 4.92 and 5.3 eV, respectively, while achieving the shortest reported ultraviolet cutoff edges at 210 and 215 nm among the boron-free germanate-based NLO materials. Importantly, these compounds also feature a remarkably broad infrared transparency range exceeding 6.8 μm. Furthermore, both compounds demonstrate a moderate second-harmonic-generation (SHG) response, comparable to that observed in KDP. Additionally, first-principles calculations unveil that the synergistic effect of the [REO6] octahedra and [GeO4] tetrahedra plays a pivotal role in governing the optical properties of Cs3REGe3O9 (RE = Y, Gd). These explored findings offer a novel avenue for leveraging the highly desired NLO materials in the region spanning from ultraviolet to mid-infrared wavelengths.
研究领域:
材料科学
·
光学工程
·
晶体化学
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DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2024
·
IF 5.8
Sijie Wang,Weishuang Fang,Daofu Wu,Kuiyi Meng,Ying Tang,Junfeng Yang,Mingjian Ding,Huixing Lin,Liang Fang
K20 microwave dielectric ceramics SrLnAlO 4 (Ln = Eu, Gd, and Ho) were prepared at 1440–1520 °C. SrEuAlO 4 and SrGdAlO 4 crystallized into tetragonal K 2 NiF 4 -type structures. While SrHoAlO 4 was a mixture (SrHo 2 Al 2 O 7 , Ho 2 O 3 , and Sr 3 HoAl 2 O 7.5 ) due to the too-small radius of Ho 3+ to bond in [HoO 9 ] dodecahedron . SrEuAlO 4 and SrGdAlO 4 exhibited near-zero τ f values of +1.7 and +4.3 ppm/°C and low ε r (19.37 and 19.14) along with contrasting Q × f values (70,030 and 5560 GHz). Compared with the modified molecular polarizability ( α Corr ) based on the bond valence deviation, the α obs values of SrEuAlO 4 and SrGdAlO 4 are much higher, indicating that their dielectric polarizabilities were underestimated, and this phenomenon was mainly influenced by rattling cations, which also causes their τ f with near-zero values. Due to the magnetic subsystem adversely affecting microwave dielectric losses , the worsened Q × f value of SrGdAlO 4 compared to that of SrEuAlO 4 is due to the high magnetic moment of Gd 3+ (7.94 μ B ).
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
M. Yousaf,Majid Niaz Akhtar,Baoyuan Wang,Asma Noor
Rare earths RE's (Pr, Y, Gd, Ho, Yb) substituted MnZn spinel ferrites with composition of Mn 0.5 Zn 0.5 M 0.02 Fe 1.98 O 4 (M = Pr, Y, Gd, Ho, Yb) are prepared by sol gel combustion approach. Low sintering temperature (500 °C) is used to sinter the RE's doped MnZn samples. MnZn samples are further characterized by X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM) to measure the cubic crystalline structure, particle size, morphology, porosity and grain size. Cubic crystalline phase of prepared RE's doped MnZn ferrites is confirmed by x-ray diffraction (XRD). The morphology, porosity and grain size are observed using FESEM. The magnetic properties of RE's doped MnZn nanoferrites are analyzed by vibrating sample magnetometer (VSM). Coercivity (H c ), remanence (M r ) and saturation magnetization (M s ) are calculated from the magnetic loops. The saturation and remanence of the nanoferrites are increased by the substitution of RE's metal ions and varies from 14.76 to 26.36 emu/g and 9.98–22.48 emu/g respectively. Bohr magneton and anisotropy constant are calculated from the recorded magnetic data. The conductive analysis of the prepared samples is studied at 40 °C −300 °C temperature, leading to the conductivity measurements from 1.12 × 10 -2 Ω -1 -cm -1 to 9.52 × 10 -2 Ω -1 -cm -1 . UV–Vis spectroscopy is used to determine the semi conducting nature of RE's doped MnZn spinel ferrite samples. The magnetic, conductive and optical study of the RE's doped MnZn nanoferrites sintered at low temperature suggests the use of these materials for microwave absorption, supercapacitor , lithium ion batteries and nanoelectronics industrial applications.
研究领域:
材料科学
·
物理学
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Hang Liu,Jinkai Zhang,Chuanyu Yang,Runkang Lv,Yihao Wen,Yuhong Zhang
In this paper, the nanosheet structure of Gd-doped ZnO nanosheets is prepared by single-step hydrothermal method. The gas sensitive performance of Gd-doped ZnO nanosheets is investigated. The Gd-ZnO sensor not only improves the response to ethanol gas by a factor of 11.8 compared to a pure ZnO sensor, but also reduces the optimal working temperature by 20 °C. The response/recovery time are also reduced to varying degrees. In addition, the Gd-ZnO sensor maintain a certain performance to ethanol gas under different humidity conditions. This article elaborates on the sensing mechanism of the Gd-ZnO sensor for ethanol gas. The research in this paper opens up a new idea for improving zinc oxide sensors.
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DOI
高影响因子
Journal of Physical Chemistry C
·
2025
·
IF 3.2
Ke Wang,Chaoqing Dong,Xiangyi Huang,Ke Gong,Xue Yang,Xuedan Zhang,Aidi Zhang,Jicun Ren
Quantum dots (QDs) were emerging as compelling candidates for optoelectronic applications, attributed to their unique size-tunable optical characteristics, narrow emission spectra, and superior photoluminescent quantum yield (PLQY). Notably, the low toxicity of InP materials makes them a promising alternative in the field of environmentally friendly optoelectronic components compared to QDs containing toxic elements (such as Cd, Hg, and Pb). However, synthetic conditions of InP QDs were extremely harsh, and the reagents were very expensive. In this study, we reported a new method for the synthesis of Gd-doped InP/ZnSe/ZnS QDs by using two inexpensive and low-reactivity phosphine precursors as the phosphorus source at a lower temperature. The InP QDs were synthesized via a one-pot solvothermal method, incorporating rare-earth Gd ions as dopants during the core growth process, and the influence of Gd doping on their stability was investigated. Gd:InP/ZnSe/ZnS QDs exhibited improved stability, as evidenced by their enhanced resistance to photo- and thermal degradation. And first-principles method reveals that Gd doping introduces shallow trap states that effectively passivates surface defects, which contribute to the overall stability of quantum dots. Furthermore, Gd:InP/ZnSe/ZnS QDs were integrated into QDs enhanced film (QDEFs) for LCD backlight display with excellent reliability performance over 2000 h.
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高影响因子
JOURNAL OF NANOBIOTECHNOLOGY
·
2024
·Vol. 22
·期 1
·1-13
·
IF 10.6
Shi Yupeng,Xia Yaning,Zhou Mengyang,Wang Yifei,Bao Jianfeng,Zhang Yong,Cheng Jingliang
Functional metal doping endows fluorescent carbon dots with richer physical and chemical properties, greatly expanding their potential in the biomedical field. Nonetheless, fabricating carbon dots with integrated functionality for diagnostic and therapeutic modalities remains challenging. Herein, we develop a simple strategy to prepare Gd/Ru bimetallic doped fluorescent carbon dots (Gd/Ru-CDs) via a one-step microwave-assisted method with Ru(dcbpy) 3 Cl 2 , citric acid, polyethyleneimine, and GdCl 3 as precursors. Multiple techniques were employed to characterize the morphology and properties of the obtained carbon dots. The Gd/Ru-CDs are high mono-dispersity, uniform spherical nanoparticles with an average diameter of 4.2 nm. Moreover, X-ray photoelectron spectroscopy (XPS), and Fourier transform infrared (FTIR) confirmed the composition and surface properties of the carbon dots. In particular, the successful doping of Gd/Ru enables the carbon dots not only show considerable magnetic resonance imaging (MRI) performance but also obtain better fluorescence (FL) properties, especially in the red emission area. More impressively, it has low cytotoxicity, excellent biocompatibility, and efficient reactive oxygen species (ROS) generation ability, making it an effective imaging-guided tumor treatment reagent. In vivo experiments have revealed that Gd/Ru-CDs can achieve light-induced tumor suppression and non-invasive fluorescence/magnetic resonance bimodal imaging reagents to monitor the treatment process of mouse tumor models. Thus, this simple and efficient carbon dot manufacturing strategy by doping functional metals has expanded avenues for the development and application of multifunctional all-in-one theranostics.
研究领域:
材料科学
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生物医学工程
·
医学影像学
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DOI
PubMed
高影响因子
ANALYTICA CHIMICA ACTA
·
2026
·
IF 6.1
Siyang Chen,Jingyi Huang,Jiaqi Zhou,Yue Wang,Hongmin Jia,Qingtao Meng,Zhiqiang Zhang
Background Glutathione (GSH), as the most abundant intracellular biothiol, plays pivotal roles in maintaining redox homeostasis and regulating cellular functions. Abnormal GSH levels are closely associated with various pathological states, including cancer, neurodegenerative diseases, and oxidative stress-related disorders. However, accurately monitoring GSH dynamics in complex biological systems remains challenging due to the limitations of single-modal imaging techniques, which often lack either sufficient sensitivity or adequate spatial resolution and tissue penetration. In this context, fluorescent/magnetic resonance (MR) dual-modal imaging has emerged as a powerful approach, enabling simultaneous acquisition of high-resolution anatomical structures and highly sensitive functional information. Results This study reports a novel fluorescent/magnetic resonance (MR) dual-modal probe, RG , for detecting GSH. The probe synergizes the high sensitivity of fluorescence imaging with the deep-tissue penetration of MR imaging, overcoming the limitations of single-modal methods. In the presence of GSH, a nucleophilic reaction triggers rhodamine spirolactam ring-opening, releasing the fluorophore. Concurrently, the gadolinium complex coordinates an additional water molecule, markedly increasing its longitudinal relaxivity (r 1 ), thus enabling synchronous dual-signal activation. Probe RG exhibits high stability, specificity for GSH, a rapid response (5 ms), physiological pH compatibility, and low cytotoxicity, achieving a detection limit of 2.47 μM. Ultimately, probe RG was successfully applied for fluorescence and magnetic resonance dual-modal imaging of GSH in a mouse model. Significance This success provides not only a reliable means to track GSH in real time but also a generalizable design strategy for dual-modal probes, advancing our capacity to decipher GSH-related biology and disease mechanisms.
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DOI
PubMed
高影响因子
LANGMUIR
·
2014
·
IF 4.384
Min Liu,Hui Liu,Shufen Sun,Xuejiao Li,Yanmin Zhou,Zhiyao Hou,Jun Lin
Porous hydroxyapatite (HAp) composite fibers functionalized with up-conversion (UC) luminescent and magnetic Na(Y/Gd)F4:Yb3+,Er3+ nanocrystals (NCs) have been fabricated via electrospinning. After transferring hydrophobic oleic acid-capped Na(Y/Gd)F4:Yb3+,Er3+ NCs into aqueous solution, these water-dispersible NCs were dispersed into precursor electrospun solution containing CTAB. Na(Y/Gd)F4:Yb3+,Er3+@HAp composite fibers were fabricated by the high temperature treatment of the electrospun Na(Y/Gd)F4:Yb3+,Er3+ NCs decorated precursor fibers. The biocompatibility test on MC 3T3-E1 cells using MTT assay shows that the HAp composite fibers have negligible cytotoxity, which reveals the HAp composite fibers could be a drug carrier for drug delivery. Because the contrast brightening is enhanced at increased concentrations of Gd3+, the HAp composite fibers can serve as T1 magnetic resonance imaging contrast agents. In addition, the composites uptaken by MC 3T3-E1 cells present the UC luminescent emission of Er3+ under the excitation of a 980 nm near-infrared laser. The above findings reveal Na(Y/Gd)F4:Yb3+,Er3+@HAp composite fibers have potential applications in drug storage/release and magnetic resonance/UC luminescence imaging.
研究领域:
生物材料学
·
医学影像学
·
纳米医学
✓ 已验证
DOI
PubMed
高影响因子
Nanoscale Research Letters
·
2021
·Vol. 16
·期 1
·1-10
·
IF 4.703
Xie Jun,Zhou Zonglang,Ma Sihan,Luo Xian,Liu Jiajing,Wang Shengyu,Chen Yuqiang,Yan Jianghua,Luo Fanghong
X-ray computed tomography (CT) has been widely used in clinical practice, and contrast agents such as Iohexol are often used to enhance the contrast of CT imaging between normal and diseased tissue. However, such contrast agents can have some toxicity. Thus, new CT contrast agents are urgently needed. Owing to the high atomic number ( Z = 83), low cost, good biological safety, and great X-ray attenuation property (5.74 cm 2 kg −1 at 100 keV), bismuth has gained great interest from researchers in the field of nano-sized CT contrast agents. Here, we synthesized BiF 3 : Ln@PVP nanoparticles (NPs) with an average particle size of about 380 nm. After coating them with polyvinylpyrrolidone (PVP), the BiF 3 : Ln@PVP NPs possessed good stability and great biocompatibility. Meanwhile, compared with the clinical contrast agent Iohexol, BiF 3 : Ln@PVP NPs showed superior in vitro CT imaging contrast. Subsequently, after in situ injection with BiF 3 : Ln@PVP NPs, the CT value of the tumor site after the injection was significantly higher than that before the injection (the CT value of the pre-injection and post-injection was 48.9 HU and 194.58 HU, respectively). The morphology of the gastrointestinal (GI) tract can be clearly observed over time after oral administration of BiF 3 : Ln@PVP NPs. Finally, the BiF 3 : Ln@PVP NPs were completely discharged from the GI tract of mice within 48 h of oral administration with no obvious damage to the GI tract. In summary, our easily synthesized BiF 3 : Ln@PVP NPs can be used as a potential clinical contrast agent and may have broad application prospects in CT imaging.
研究领域:
医学影像学
·
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Kaichen Qian,Jiantai Fan,Zongyun Shen,Lulu Zhang,Xianglong Fan,Tao Feng,Weiwen Zhou,Minghui Feng,Benxue Jiang,Long Zhang
A citrate-nitrate combustion method was applied to synthesize fine composite Gd 2-x Y x O 3 -MgO (x = 0, 0.02, 0.2, 0.3, 0.4, 0.6) nanopowders . Y 2 O 3 substitution inhibited Gd 2 O 3 phase transition from cubic structure to monoclinic structure during sintering, thereby stabilizing its cubic structure to room temperature. This approach led to nanocomposite ceramics with a grain size of about 190 nm and increased the transmittance to 85% over the 3–5 μm wavelength range when x = 0.3. However, the addition of Y 2 O 3 weakened the mechanic properties of the nanocomposite ceramics.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 48
·期 3
·1233-1240
·
IF 3.3
Li Ding,Xin Kong,Yan Gong,Shanxin Yang,Yongde Yan,Yuan Deng,Yun Xue,Kai Zhu,Fuqiu Ma,Wei Liu
Bismuth (Bi) is a potential cathode material to drive the development of Gd extraction by molten salt electrolysis. However, study on the electrolytic reduction of Gd by Bi electrode in melts has not receive sufficient attention and understanding. Therefore, in this work, the electrochemical reactions, kinetic processes and thermodynamic properties in the electrolytic extraction of Gd were investigated by various electrochemical methods. The electrochemical results showed that only two Gd–Bi alloys were formed in the electrode reaction. Moreover, the exchange current density and activity coefficient during electrolysis were determined by galvanostatic pulse (GP) and Coulomb titration, respectively. The temperature dependence of both exchange current density and activity coefficient was further revealed. Finally, Gd was successfully extracted in the form of alloys through potentiostatic electrolysis.
研究领域:
冶金学
·
电化学
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产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 46
·16143-16151
·
IF 6.4
Yixiao Han,Leipeng Li,Chongyang Cai,Pei Li,Tao Li,Xiumei Han,Dengfeng Peng,Yanmin Yang
Mechanoluminescent materials have gained considerable attention over the past few years due to their unique characteristic of converting some useless mechanical actions in our daily life like compression and friction into usable light sources. However, the application scenarios of mechanoluminescent materials are still quite limited, mainly to stress sensors and visualization of pressure. Our work aims to solve this problem. Here, we demonstrate that Y2O2S:Er3+ with excellent mechanoluminescence (ML) could be used for energy-saving temperature sensing. Upon stimulation of external force, Y2O2S:Er3+ emits bright green ML that is attributed to the 2H11/2 → 4I15/2 and 4S3/2 → 4I15/2 transitions of Er3+. These transitions are confirmed to conform with the Boltzmann distribution during a dynamic temperature-changing test. In addition, we confirm the feasibility of the ML thermometry framework in Er3+-doped Gd2O2S and Lu2O2S. Our work provides a new perspective for broadening the application scenarios of mechanoluminescent materials.
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高影响因子
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