Advanced Science
·
2022
·Vol. 10
·期 4
·2204755
·
IF 17.521
Shaoxin Cui,Hongping Wu,Zhanggui Hu,Jiyang Wang,Yicheng Wu,Hongwei Yu
Oxychalcogenides capable of exhibiting excellent balance among large second-harmonic generation (SHG) response, wide band gap ( E g ), and suitable birefringence (Δ n ) are ideal materials class for infrared nonlinear optical (IR NLO) crystals. However, rationally designing a new high-performance oxychalcogenide IR NLO crystal still faces a huge challenge because it requires the optimal orientations of the heteroanionic groups in oxychalcogenide. Herein, a series of antiperovskite-type oxychalcogenides, Ae 3 Q[GeOQ 3 ] (Ae = Ba, Sr; Q = S, Se), which were synthesized by employing the antiperovskite-type Ba 3 S[GeS 4 ] as the structure template. Their structures feature novel three-dimensinoal frameworks constructed by distorted [QAe 6 ] octahedra, which are further filled by [GeOQ 3 ] tetrahedra to form antiperovskite-type structures. Based on the unique antiperovskite-type structures, the favorable alignment of the polarizable [GeOQ 3 ] tetrahedra and distorted [QAe 6 ] octahedra have been achieved. These contribute the ideal combination of large SHG response (0.7–1.5 times that of AgGaS 2 ), wide E g (3.52–4.10 eV), and appropriate Δ n (0.017–0.035) in Ae 3 Q[GeOQ 3 ]. Theoretical calculations and crystal structure analyses revealed that the strong SHG and wide E g could be attributed to the polarizable [GeOQ 3 ] tetrahedra and distorted [QAe 6 ] octahedra. This research provides a new exemplification for the design of high-performance IR NLO materials.
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PubMed
高影响因子
JOURNAL OF FLUORESCENCE
·
2024
·
IF 2.6
Peng Fei,Ai Xiangnan,Bu Xiaoyu,Zhao Zixuan,Gao Baoxiang
Mitochondrial membrane potential (MMP) is crucial for mitochondrial function and serves as a key indicator of cellular health and metabolic activity. Traditional lipophilic cationic fluorescence intensity probes are unavoidably influenced by probe concentration, laser intensity, and photobleaching, limiting their accuracy. To address these issues, we designed and synthesized a pair of fluorescence molecules, OR-C8 and SiR-BA, based on the Förster Resonance Energy Transfer (FRET) mechanism, for dual-modality visualization of MMP. OR-C8 anchors to the inner mitochondrial membrane through strong hydrophobic interactions, while SiR-BA is expelled from mitochondria when MMP decreases, thereby regulating the FRET process. During MMP reduction, the fluorescence intensity and lifetime of OR-C8 increase, while the fluorescence intensity of SiR-BA decreases. By combining changes in fluorescence intensity ratio and fluorescence lifetime, dual-modality visualization of MMP was achieved. This method not only accurately reflects MMP changes but also provides a novel tool for in-depth studies of mitochondrial function and related disease mechanisms, offering significant potential for advancing mitochondrial research and therapeutic development.
研究领域:
细胞生物学
·
生物物理学
·
荧光显微镜技术
·
分子生物学
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PubMed
高影响因子
Horticulturae
·
2024
·Vol. 10
·期 6
·587
·
IF 3.1
Jiangmei Hu,Junhuo Cai,Xinrui Hu,Lijun Wang,Qiangqiang Cheng,Xiuhua Tao
Turpinia argutais an excellent medicinal plant mainly used for the treatment of pharyngitis, tonsillitis, and tonsillar abscesses. However, an efficient regeneration protocol using tissue cultures forT. argutadoes not exist. Its main medicinal constituents are flavonoids, particularly ligustroflavone and rhoifolin. Here, we aimed to establish a tissue culture system forT. argutafor the first time using annual stem segments with axillary buds harvested from the field of the Jiangxi Academy of Forestry as explants by dynamically determining the accumulation of effective functional components in the tissue culture plantlets. Orthogonal tests were conducted to compare the effects of different explant disinfection times, media, and exogenous hormone ratios on the induction of the axillary bud growth, successional proliferation, and rooting ofT. argutastem segments. The best explant disinfection effect was achieved by disinfecting theT. argutaexplant with 75% ethanol for 50 s, followed by 0.1% mercuric chloride (HgCl2) for 6 min, and the optimal media for successional proliferation and rooting were Murashige and Skoog (MS) + 0.2 mg/L of 6-benzyladenine (6-BA), + 0.03 mg/L of naphthaleneacetic acid (NAA), and ½ MS + 2.5 mg/L of indole-3-butyric acid + 0.5 mg/L of NAA, respectively. The detection of ligustroflavone and rhoifolin in tissue culture plantlets 0, 3, and 5 months after transplanting showed a significant increasing trend and eventually exceeded the content requirements of the 2020 Edition ofChinese Pharmacopoeia forT. arguta. Our findings provide, for the first time, an effective tissue culture system forT. arguta, thereby providing important information to support the germplasm preservation, innovation, and application ofT. argutain the future.
研究领域:
药理学
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植物生物技术
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药用植物
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组织培养
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高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2024
·Vol. 38
·期 12
·e7696
·
IF 3.7
Xueze Wang,Huawei Zhou,Xianxi Zhang
Bi-based organic halides have attracted widespread attention as potential substitutes for lead-based organic halide perovskites and have been explored and applied in many optoelectronic devices. The rational design of organic Bi-based halides is a popular research topic. In this work, we used benzylammonium (BA) cations to synthesize BA 3 Bi 2 I 9 (BBI) perovskite material and FA 3 Bi 2 I 9 (FBI, FA [formamidinium]) as control. We observe that the benzene rings in BA cations overlap with each other due to the benzene rings Π-Π conjugation in the crystal structure of BBI, which exhibits large interplanar spacing due to large BA ions. BBI has preferential orientation along the (020) crystal plane. Due to conjugation, scanning electron microscopy (SEM) and energy dispersive spectrometer (EDS) mapping images indicate that the surface of the BBI thin film is smoother and more uniform than that of the FBI thin film. We fabricated the device by growing thin films of BBI and FBI on ITO interdigital electrodes. The photodetector based on BBI SC exhibits stability and regularity with turning on/off of the light at different intensities (10, 20, 30, and 40 W m −2 ) and wavelengths (386, 397, 405, and 433 nm). The ultraviolet–visible (UV–vis) absorption and reflection spectrum analysis shows that BBI has a slightly wider bandgap than FBI. This study can provide some ideas for the design Π-Π conjugation in organic metal halides.
研究领域:
材料科学
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光电学
·
化学
·
物理学
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高影响因子
Advanced Optical Materials
·
2023
·Vol. 11
·期 12
·2203016
·
IF 9
He Wang,Xi Zhang,Yali Ma,Mengke Wang,Jun Wang
Flexible optoelectronic devices have attracted enormous attention as an essential component in next-generation wearable devices. To meet the trend of biocompatibility, flexibility and low cost, paper-based optoelectronic devices have become compelling candidates. Moreover, 2D organic–inorganic metal halide perovskites have been extensively studied for the application in flexible optoelectronic devices owing to their long-term moisture stability, optoelectronic tunability, and multiple quantum well (MQW) structures. Herein, the paper-based flexible optoelectronic devices are designed by spin-coating PEDOT:PSS and (iso-BA) 2 MA n -1 Pb n I 3 n +1 ( n ≥ 1) on regular filter paper with responsivity of 2.62 mA W −1 and response time (τ rise /τ decay ) of 0.81/0.18 s at 35% relative humidity (RH). Furthermore, the responsivity may be increased by 250% within the humidity range from 35% to 90%, and remains above 92% of the initial value after measured for 1800 s at 60% RH. This work can pave the way for further studies about the humidity effect on perovskites for next-generation green wearable electronics.
研究领域:
材料科学
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光电技术
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纳米技术
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可穿戴技术
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DOI
高影响因子
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
·
2022
·Vol. 39
·期 10
·2625-2636
·
IF 2.058
Hang Liu,Xingke Zheng,Pengcheng Wang,Haiyan Wang,Yuhong Zhang
In this work, a comparative study of the upconversion (UC) luminescence properties of ${{\rm Er}^{3 +}} {-} {{\rm Yb}^{3 +}}$-co-doped ${{\rm AWO}_4}$ (${\rm A} = {\rm Ba}$, Sr, and Ca) scheelite phosphors and ${{\rm Er}^{3 +}} {-} {{\rm Yb}^{3 +}} $-co-doped ${{\rm MgWO}_4}$ wolframite phosphors is reported. Under 980 nm excitation, all the samples emit green and red emissions. The ${{\rm Er}^{3 +}} {-} {{\rm Yb}^{3 +}}$-doped ${{\rm MgWO}_4}$ phosphor has a higher UC emission intensity. Furthermore, the optical temperature sensing properties in ${{\rm Er}^{3 +}} {-} {{\rm Yb}^{3 +}}$-co-doped ${{\rm AWO}_4}$ (${\rm A} = {\rm Ba}$, Sr, Ca, and Mg) phosphor samples are investigated. The relative sensitivity (${{\rm S}_r}$) based on thermally coupled levels (TCLs) increases gradually with an increase in matrix phonon energy. The absolute sensitivity (${{\rm S}_a}$) values of the samples are accurately predicted by the chemical bonding parameter (${{\rm f}_c}$). The results of the correlation between the UC luminescence properties and the microscopic crystal structure, and the relationship of the temperature sensitivity and the host parameters, provide us with a guiding insight for the selection of a host material with ideal temperature measurement capability.
研究领域:
材料科学
·
光学
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高影响因子
Journal of Materials Chemistry C
·
2022
·Vol. 10
·期 10
·3826-3837
·
IF 8.067
Qing Yao,Jie Zhang,Kaiyu Wang,Changqian Li,Chenyu Shang,Haiqing Sun,Weiwei Zhang,Tianliang Zhou,Huiling Zhu,Jianxu Ding
Recently, quasi-two-dimensional (quasi-2D) organic–inorganic hybrid perovskites, such as those obtained by introducing long-chain organic cations like n-butylammonium (BA) into 3D MAPbI3 perovskites, have been widely investigated as optoelectronic devices owing to their high light absorption coefficient, ultra-long carrier diffusion length, and high defect tolerance. Controlling the BA content to obtain (BA)2(MA)n−1PbnI3n+1 with homogeneous n values is crucial for extraction of photo-carriers because volatile n value related interior heterojunctions are unfavorable for extraction of photo-carriers. Here, we revealed the fundamental growth mechanism of (BA)2(MA)n−1PbnI3n+1. The growth mechanism of (BA)2(MA)n-1PbnI3n+1 SCs is controlled by the evolution of macroscopic spiro dislocations and its derived growth steps. In terms of the understanding of the surface growth mechanism, we grew a series of single crystals with individual n values, avoiding interior heterojunctions, and obtained a lower dark current of 0.247 nA, a high photocurrent (74.5 nA) and high responsiveness (0.064 A W−1) and an external quantum efficiency of 19.5% for a photodetector based on the (BA)2(MA)3Pb4I13 SC. This contributes to an in-depth understanding of the growth mechanism of quasi-2D (BA)2(MA)n−1PbnI3n+1 SCs and the development and optimization of quasi-2D layered materials and devices for optoelectronics.
研究领域:
材料科学
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光电子学
·
晶体生长
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半导体器件
·
钙钛矿材料
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高影响因子
ChemCatChem
·
2026
·Vol. 18
·期 13
·e70894
·
IF 4.1
Siqi Tan,Jie Gu,Kexin Sha,Yihan Jiao,Yanxi Wu,Yiru Wang,Hongjian Yu,Jie Han
Niobates have emerged as promising candidates for environmental catalysis, particularly in the realm of piezocatalysis, owing to their distinctive layered architectures and robust physicochemical performance. In this study, we report the successful fabrication of A-site cation-tailored ABi 2 Nb 2 O 9 (A = Sr, Ca, and Ba) layered oxides via a molten salt strategy. Notably, the molten salt-synthesized SrBi 2 Nb 2 O 9 exhibits superior piezocatalytic performance in H 2 O 2 evolution with a yield reaching 1836.1 µmol g −1 h −1 , approximately 2.1 times higher than that of SrBi 2 Nb 2 O 9 prepared by the solid-state method. Furthermore, this material demonstrates exceptional piezocatalytic activity, degrading 98.0% of Rhodamine B within 75 min, with a reaction rate constant of 0.04966 min −1 . In addition, the catalyst shows durable stability, maintaining 97% of its original activity after four cycles. The influence of environmental factors, including solution pH and inorganic anions (Cl − and CO 3 2− ), was also systematically evaluated. This work elucidates that the synergistic integration of A-site cation engineering and molten salt synthesis effectively modulates the piezoelectric response of ABi 2 Nb 2 O 9 (A = Sr, Ca, and Ba), offering new insights and a viable pathway for the design of novel, high-performance piezocatalysts for environmental remediation. Graphical Molten salt-mediated A-site cation engineering of ABi 2 Nb 2 O 9 effectively modulates piezoelectric response, achieving superior piezocatalytic H 2 O 2 production and pollutant degradation. This work provides a viable pathway for designing high-performance piezocatalysts for environmental remediation.
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高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Jie Li,Ziyi Zhang,Hongji Zou,Ying Tang,Weiping Gong,Liang Fang
Dense ALaGa 3 O 7 (A = Ba, Sr, Ca) ceramics with tetragonal melilite structure were prepared by the solid-phase method. The optimal microwave dielectric properties were obtained with ε r = 11.1 ± 0.1, 11.3 ± 0.1, 13.3 ± 0.1; Q × f = 49,400 ± 300, 31,100 ± 300, 17,100 ± 300 GHz; and τ f = −41.5 ± 1.0, −36.6 ± 1.0, −28.8 ± 1.0 ppm/°C for BaLaGa 3 O 7 , SrLaGa 3 O 7 , and CaLaGa 3 O 7 , respectively. The increased ε r and τ f while reduced Q × f in the order of BaLaGa 3 O 7 , SrLaGa 3 O 7 , and CaLaGa 3 O 7 were mainly due to the enhanced rattling effect of A-site, which resulted in large positive discrepancy Δ ε r between ε r ( Corr ) and ε r (C-M) increasing from +31.8 % to +74.7 %. The vibration modes, chemical bond characteristic and intrinsic dielectric properties were analysed by Raman, P-V-L theory, and far-infrared reflectance spectroscopy. Additionally, a dielectric resonator antenna based on BaLaGa 3 O 7 ceramic was designed with a bandwidth of 270 MHz at 6.8–7.1 GHz and a gain of 5.6 dBi at 6.9 GHz, indicating the potential candidate for dielectric resonator antennas.
研究领域:
材料科学
·
电子功能材料
·
微波技术
·
无机非金属材料
·
介电材料
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高影响因子
Journal of Materials Research and Technology-JMR&T
·
2025
·
IF 6.6
Geng Tang,Hong Yang,Bingqing Zhao,Dunying Wang,Fangfang Zeng,Qibin Liu
The rapid repair of bone defects remains a challenging clinical goal, with bio-piezoelectric composites emerging as promising materials due to their ability to replicate bone’s natural composition and electrical functionality. This study developed hydroxyapatite (HA)-based composites incorporating (Ba,Ca)(Ti,Sn)O3-based piezoceramics, achieving piezoelectric coefficients of 28.7 ± 2.48 pC/N, 11.1 ± 0.57 pC/N, and 5.7 ± 0.98 pC/N at HA mass fractions of 10%, 20%, and 30%, respectively, with a porosity around 20%. The composites were synthesized with a solid-state sintering method. The phase structure, surface morphology, and ferroelectric domain configuration of the composites were characterized. Electrical properties, compressive strengthen, hydrophilicity, in vitro bioactivity, biocompatibility and osteogenic ability were assessed. X-ray diffraction (XRD) analysis confirmed that all composites consisted of perovskite structure and HA phases. Microscopic observations revealed the (Ba,Ca)(Ti,Sn)O 3 -based piezoceramics particles embedded within the HA matrix. Evenly dispersed, irregular pores were formed, and pore size decreased as the HA content increased. The composite with 20 wt.% HA exhibited dense, small wedge-shaped domains and ferroelectric orthogonal (O) phase. Importantly, these composites demonstrated favorable compressive strength, surface wettability and biocompatibility, along with enhanced bioactivity and osteogenic differentiation ability in vitro , underscoring their potential in bone tissue engineering applications.
研究领域:
生物医学工程
·
材料科学
·
骨组织工程
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高影响因子
Polymers
·
2021
·Vol. 13
·期 2
·285
·
IF 4.329
Lingfei Li,Qiu Sun,Xiangqun Chen,Zhaohua Jiang,Yongjun Xu
The low dielectric constant of the nonpolar polymer poly(1-butene) (PB-1) limits its application as a diaphragm element in energy storage capacitors. In this work, Ba(Zr0.2Ti0.8)O3-coated multiwalled carbon nanotubes (BZT@MWCNTs) were first prepared by using the sol–gel hydrothermal method and then modified with polydopamine (PDA) via noncovalent polymerization. Finally, PB-1 matrix composite films filled with PDA-modified BZT@MWCNTs nanoparticles were fabricated through a solution-casting method. Results indicated that the PDA-modified BZT@MWCNTs had good dispersion and binding force in the PB-1 matrix. These characteristics improved the dielectric and energy storage performances of the films. Specifically, the PDA-modified 10 vol% BZT@ 0.5 vol% MWCNTs/PB-1 composite film exhibited the best dielectric performance. At 1 kHz, the dielectric constant of this film was 25.43, which was 12.7 times that of pure PB-1 films. Moreover, its dielectric loss was 0.0077. Furthermore, under the weak electric field of 210 MV·m−1, the highest energy density of the PDA-modified 10 vol% BZT@ 0.5 vol% MWCNTs/PB-1 composite film was 4.57 J·cm−3, which was over 3.5 times that of PB-1 film (≈1.3 J·cm−3at 388 MV·m−1).Keywords:sol–gel hydrothermal method;PDA-modified BZT@MWCNTs nanoparticles;dielectric performance;synergistic effect
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高影响因子
Journal of Materials Chemistry C
·
2019
·Vol. 7
·期 43
·13536-13547
·
IF 6.641
Dongjie Liu,Peipei Dang,Xiaohan Yun,Guogang Li,Hongzhou Lian,Jun Lin
Recently, controllable luminescence tuning and single-phased white light emission have been extensively studied to improve the luminescence performances of phosphors for white light-emitting diodes (WLEDs). In this work, the controllable photoluminescence tuning from bluish-green to red was successfully achieved in Bi3+,Eu3+-codoped Sr2−yBayLaGaO5 solid solutions, combining the effects of crystallographic site engineering and energy transfer. The phase composition and structural variation of the designed phosphors were thoroughly analyzed through X-ray powder diffraction (XRD) and Rietveld refinement. The effects of cation substitutions on the photoluminescence properties were investigated in detail and the corresponding mechanism was proposed. A regular red-shift of Sr2−yBayLaGaO5:0.02Bi3+ in the bluish-green region could be observed when Sr2+ was substituted by Ba2+, which is attributed to the crystal field splitting and nephelauxetic effect. The red-shift of emission of Ba2LaGaO5:0.02Bi3+ phosphor with gradually increasing excitation wavelength reveals that Bi3+ ions occupy different cation sites to form multiple luminescent centers. Besides, the efficient energy transfer was designed and successfully realized in Sr2−yBayLaGaO5:0.02Bi3+,zEu3+ (y = 0–2.0; z = 0–0.20) samples. The energy transfer efficiency can reach up to 88%, 91% and 77% at z = 0.20 for y = 0, 1.0 and 2.0, respectively. Moreover, the thermal quenching behaviors of the studied phosphors reveal that the codoping of Eu3+ could efficiently improve the thermal stability of Sr2LaGaO5:0.02Bi3+ phosphor. Finally, the WLED devices were fabricated by composing 370 nm UV chips and single-phased Sr2−yBayLaGaO5:0.02Bi3+,0.05Eu3+ (y = 0, 1.0, 2.0) phosphors. The as-fabricated devices presented relatively excellent EL performances, the color coordinates of which all locate in the warm white light region. These results indicate the as-prepared Sr2−yBayLaGaO5:Bi3+,Eu3+ phosphors can be potential candidates for color tuning and efficient single-phased white emission in UV-based WLED lighting applications.
研究领域:
材料科学
·
光学材料
·
固态照明
·
荧光粉化学
·
能量传递
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高影响因子
危险品化学品经营许可证（带存储）