ECS Journal of Solid State Science and Technology
·
2015
·Vol. 4
·期 5
·M25
·
IF 1.558
Vantu Nguyen,Yueli Liu,Yang Li,Shah Abdul Hakim,Xue Yang,Wen Chen
Fe2(MoO4)3/carbon nanotubes (CNTs) nanocomposite was prepared by a precipitation method and used as a cathode for sodium-ion batteries (SIBs). The field emission scanning electron microscopy (FESEM) test showed that the CNTs and Fe2(MoO4)3 nanosheets formed an interpenetrating network structure. The X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) analysis confirmed that the Fe2(MoO4)3 was a monoclinic crystal structure and mixed with element states in the nanocomposite. The electrochemical properties of the Fe2(MoO4)3/CNTs nanocomposite were studies by electrochemical impedance spectroscopy (EIS) and galvanostatic charge-discharge measurement. The results indicated that Fe2(MoO4)3/CNTs nanocomposite had high specific capacity and good cycling stability as a cathode material for SIBs. As the charge/discharge curent density is at 1 C, the initial specific capacity of Fe2(MoO4)3/CNTs nanocomposite is 85 mAhg−1, and it remains 79.81 mAhg−1 after 50 cycles.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Nali Li,Yong Yu,Yanwei Tong,Tiantian Liu,Xuefeng Zhang
An enhanced sol-gel combustion method was used to synthesize different porous Sc 3+ -doped Li 3 V 2-x Sc x (PO 4 ) 3 /C (x = 0.00, 0.05, 0.10 and 0.15) compounds. The substitution of Sc 3+ into the V 3+ sites of Li 3 V 2-x Sc x (PO 4 ) 3 /C expands the lattice volume along with the enlargement of Li + diffusion channel, which is beneficial for Li + transportation and ionic conductivity improvement. Besides, the Sc 3+ doping content exhibits a great impact on the morphology of Li 3 V 2-x Sc x (PO 4 ) 3 /C composite. The pristine Li 3 V 2 (PO 4 ) 3 /C are constituted of porous particles and nanorods , and the ratio of nanorods to particles can be controlled by adjusting the amount of Sc 3+ doping since the ratio of nanorods to particles decreases with increasing Sc 3+ doping content. When Sc 3+ doping content increases to a certain level (x = 0.15, Li 3 V 1.85 Sc 0.15 (PO 4 ) 3 /C), the nanorods are hardly seen. Li 3 V 1.90 Sc 0.10 (PO 4 ) 3 /C with higher tapped density, better reversibility, smaller resistance and larger Li + diffusion coefficient demonstrates outstanding rate performance and cyclic stability, together with high specific discharge capacities of 130.2 and 92.9 mAh g −1 at 0.5 and 20 C, respectively. Furthermore, a superior specific discharge capacity of 85.8 mAh g −1 was retained at 20 C following 1000 cycles. Overall, a novel approach for the preparation of high-performance Li 3 V 2-x Sc x (PO 4 ) 3 /C cathodes with different morphologies for lithium-ion batteries is provided.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2017
·Vol. 29
·期 3
·1817-1822
·
IF 2.019
Wang Zixing,Yuan Changlai,Zhu Baohua,Feng Qin,Liu Fei,Miao Lei,Zhou Changrong,Chen Guohua
A novel microwave dielectric ceramics Bi(Sc 1/3 Mo 2/3 )O 4 with low firing temperature were prepared via the solid reaction method. The specimens have been characterized using scanning electron microscopy, X-ray diffraction, Raman spectroscopy and DC conductivity. The Bi(Sc 1/3 Mo 2/3 )O 4 ceramics showed B-site ordered Scheelite-type structure with space group C2/c. Raman analysis indicated that prominent bands were attributed to the normal modes of vibration of MoO 4
2− tetrahedra. The dielectric loss of Bi(Sc 1/3 Mo 2/3 )O 4 ceramics can be depended strongly the bulk conductivity by DC measurement. The superior microwave dielectric properties are achieved in the Bi(Sc 1/3 Mo 2/3 )O 4 ceramic sintered at 875 °C/4 h, with dielectric constant ~ 25, Q × f ~ 51,716 GHz at 6.4522 GHz and temperature coefficient of resonance frequency ~ − 70.4 ppm/°C. It is a promising microwave dielectric material for low-temperature co-fired ceramics technology.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2022
·Vol. 9
·期 23
·6067-6074
·
IF 7.779
Man Zhang,Bingbing Zhang,Daqing Yang,Ying Wang
A new birefringent crystal [C(NH2)3]2S2O8 was obtained by combining the π-conjugated [C(NH2)3] cation and the [S2O8] groups with localized O–O π-bonds. Optical measurements show that the UV cutoff wavelength of [C(NH2)3]2S2O8 is 222 nm, and its birefringence is 0.102 at 546 nm. The calculated results show that its large birefringence is attributed to the synergistic effect of the [C(NH2)3] and [S2O8] units, which is the first case among known birefringent crystals. These results provide new insights into the design of superior birefringent materials.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
Solar RRL
·
2018
·Vol. 2
·期 10
·1800144
·
IF 0
Muhammad Ishaq,Hui Deng,Shengjie Yuan,Huan Zhang,Jahangeer Khan,Umar Farooq,Haisheng Song,Jiang Tang
Sb 2 (Se x S 1–x ) 3 has been proven a very promising light absorbing material for photovoltaic applications due to its high stability, tunable band gap, non-toxic element, and high extinction coefficient. For Sb 2 (Se x S 1–x ) 3 alloy film deposition, the authors develop a single source based rapid-thermal-evaporation (RTE) method instead of the traditional in-situ sulfurization or double source co-evaporation based RTE method. The absorber band gap can be precisely tuned from 1.1 to 1.7 eV by simply varying the molar ratio of Sb 2 Se 3 and Sb 2 S 3 source powder. From the systematical composition screening, FTO/CdS/Sb 2 (Se 0.68 S 0.32 ) 3 /Au devices show higher power conversion efficiency (PCE ∼ 4.17%) when compared with other absorber compositions based devices. In order to achieve thinner ETL layers and simultaneously avoid pinholes led by rough FTO surface, we introduce for the first time double buffer layer in the Sb 2 (Se 0.68 S 0.32 ) 3 device system which could further improve the device efficiency from 4.17% to 5.73%. The double buffer layer ZnO/CdS helped to form graded energy band alignment, suppress charge recombination and efficiently extract electrons. The devices obtained higher J sc and V oc supported by various physical characterization analyses. The facile single source deposition method, efficient double buffer layer device structure and notable PCE are expected to pronouncedly promote antimony chalcogenide device development.
研究领域:
材料科学
·
光伏技术
·
半导体物理
·
薄膜器件
·
能源材料
✓ 已验证
DOI
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Run Ye,Bin-Wen Liu,Xiao-Ming Jiang,Jian Lu,Hui-Yi Zeng,Guo-Cong Guo
Exploration of a new nonlinear optical (NLO)-active functional motif is important in the rational design of promising infrared (IR) NLO materials. Compared with typical tetrahedral MQ4 (M = IIB, III, IV metals; Q = S, Se) motifs, MQ3 (M = As, Sb) pyramids favor high second-harmonic generation (SHG) efficiency while frequently hindering phase matching (PM) because of excessively large optical anisotropy. The surfactant–thermal method was first adopted to achieve PM in MQ3-containing systems and synthesize mixed covalent–ionic IR NLO materials. Two new thioarsenates of AMnAs3S6 (A = Cs, Rb) exhibiting strong PM SHG efficiencies comparable to commercial AGS and laser-induced damage thresholds of one order higher than AGS were obtained. The [As3S6]3– unit in their structures is an unprecedented NLO-active functional motif, which can be useful in designing new IR NLO compounds with large SHG efficiency. In addition, the surfactant–thermal method provides a new general strategy for synthesizing new IR NLO materials.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
MICROCHIMICA ACTA
·
2021
·Vol. 188
·期 4
·1-8
·
IF 5.833
Wu Daohong,He Yuhan,Tong Liujuan,Wang Jianxiu,Liu Lin,Yi Xinyao,Hu Shengqiang
An electrochemical sensor capable of quantitative determination of caspase-3 activities was developed. A thiolated peptide whose sequence contained a caspase-3 cleaved site and a cell penetration sequence was preimmobilized onto an electrode. The quantification of caspase-3 was accomplished after cell penetration and the subsequent adsorption of silver nanoparticles (AgNPs). The oxidation current of AgNPs was found to be inversely proportional to the concentration of caspase-3 between 0.02 and 0.2 U/mL. A detection limit of 0.02 U/mL for caspase-3 was achieved due to the large number of positively charged AgNPs adsorbed onto the negatively charged cells. The proof of concept was demonstrated by monitoring the cleavage of surface-confined peptide substrates by caspase-3 in cell lysates. The current sensor could be extended to detect cells by replacing the surface-confined peptide with aptamers that recognize cells. Thus, the use of a cell as a matrix for AgNPs shows excellent potential for constructing electrochemical sensors and provides a useful alternative for sensor development in the future. Graphical abstract
Cells modified with silver nanoparticles were utilized as the electrochemical readout of an electrochemical assay.
研究领域:
生物化学
·
分析化学
·
纳米技术
✓ 已验证
DOI
PubMed
高影响因子
Journal of Superconductivity and Novel Magnetism
·
2025
·Vol. 38
·期 2
·112
·
IF 1.7
Li Xiaofeng,Gao Yuxia,Tian Zhaoming,Ren Weijie,Sun Xin,Wang Mingli
KNi(PO 3 ) 3 was successfully synthesized by solid-state method and the magnetic properties were characterized. The crystal structure of KNi(PO 3 ) 3 belongs to trigonal crystal system with space group R 3, where Ni 2+ ions form the distorted honeycomb-lattice within the ab-plane stacking in the “ABAB” type fashion along the c -axis. Magnetization measurements reveal the presence of antiferromagnetic (AFM) interaction with Curie Weiss (CW) temperature θ CW = − 12.905 K but without long-range magnetic order down to 2 K. Notably, the CW fitted effective moment µ eff = 3.35µ B and saturated magnetization M S = 2 μ B /Ni 2+ at 2 K support KNi(PO 3 ) 3 as an S = 1 spin system. Intriguingly, the zero-field specific heat exhibits a broad peak maximized at ~ 2.5 K indicating the onset of short-range spin correlation between Ni 2+ ions, while the integrated magnetic entropy ( S mag ) is close to the expected Rln3 for S = 1 system, indicative of large spin fluctuation below 2 K driven by spin frustration.
研究领域:
无机化学
·
固体化学
·
磁学
·
凝聚态物理
·
材料科学
·
晶体工程
✓ 已验证
产品关联
DOI
高影响因子
MEDICINAL CHEMISTRY RESEARCH
·
2018
·Vol. 28
·期 2
·133-142
·
IF 1.607
Feng Yu,Teng Xingxing,Gu Jinhua,Yu Bangwei,Luo Yan,Ye Lianbao
In the previous research, our group designed and synthesized 2,3,4,5-tetrahydro-1 H -pyrido-[4,3-b] indoles, which showed high anti-tumor activity. In this study, a series of novel 2,3,4,5-tetrahydro-1 H -pyrido-[4,3-b] indole derivatives were designed by introducing an alkyl or aralkyl and a sulfonyl group, which are considered as the pharmacophores of some antitumor drugs based on the combination principles, and synthesized. The antiproliferative activity of all the target compounds were evaluated against Hela, A549, HepG2, and MCF-7 cell lines using the MTT assay in vitro. The results were represented by IC 50 values. All compounds showed moderate to excellent antiproliferative activity with IC 50 values between 0 μM and 100 μM against cancer cells. The proliferations of Hela, A549, HepG2, and MCF-7 cell lines were inhibited in a dose-dependent manner, and the cytolytic activity was markedly inhibited at the same time. The IC 50 values of intermediate 3 inhibited against Hela, A549, HepG2, and MCF-7 cell lines were 52.75, 50.30, 60.31, and 54.39 μM, respectively, which were higher than the new compounds that we expected. The compounds 4a – 4d bearing sulfonyl, substituted by electron donating group, showed moderate to significant antiproliferative activity, in which compound 4c was the best with the IC 50 values of 13.71, 9.42, 15.06, and 14.77 μM, and these results suggested that the introduction of sulfonyl could increase the antiproliferative activity of 2,3,4,5-tetrahydro-1 H -pyrido-[4,3-b]indole. Compounds 4e – 4g bearing alkyl, phenyl, and arylated alkyl produced good antiproliferative activity and the IC 50 value of 4 g was lower than 30 μM. The target compounds were more potent against A549 compared to the other three cell lines. Molecular docking studies revealed the binding orientations of all the synthesized compounds in the active site of c-Met. Moreover, molecular dynamics simulations have been performed to evaluate the binding stabilities between the synthesized compounds and their receptors.
研究领域:
药物化学
·
肿瘤学
·
计算生物学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2018
·Vol. 6
·期 22
·5908-5915
·
IF 5.976
Gaoliang Fang,Daqin Chen,Su Zhou,Xiao Chen,Lei Lei,Jiasong Zhong,Zhenguo Ji
Successful development of all-inorganic CsPbX3 (X = Cl, Br, or I) perovskite quantum dots (PQDs) has been witnessed due to their unique optical and electrical properties. However, the heavy usage of Pb element in PQDs has limited the commercial application of these PQDs, and the preparation of low-Pb or Pb-free PQDs is imperative. In this study, we report room-temperature reverse synthesis of CsPbxMn1−xCl3 PDQs from CsMnCl3 precursor nanocrystals through cation exchange. Interestingly, two-step phase transformation processes from hexagonal CsMnCl3 to rhombohedral Cs4PbxMn1−xCl6 and finally to cubic CsPbxMn1−xCl3 are evidenced. With an increase in the reaction time, Mn2+ ions in the PQD lattice are gradually replaced by Pb2+ ions. Notably, Mn2+ d → d broadband luminescence is not detected for the Cs4PbxMn1−xCl6 product, but it is intense for the CsPbxMn1−xCl3 sample owing to efficient energy transfer from CsPbCl3 to Mn2+. Moreover, it is found that the introduction of Br− into the reaction system will prohibit the complete phase transformation from rhombohedral Cs4PbxMn1−x(Cl/Br)6 to cubic CsPbxMn1−x(Cl/Br)3. By controlling the ratio between the CsMnCl3 precursor and PbBr2, tunable luminescence is easily achieved due to the combined emissions from both CsPb(Cl/Br)3 PQDs and Mn2+-emitting centers.
研究领域:
材料科学
·
纳米技术
·
光电
✓ 已验证
DOI
高影响因子
MACROMOLECULAR RAPID COMMUNICATIONS
·
2018
·Vol. 39
·期 11
·1800048
·
IF 4.441
Shuang Pan,Mingjing Zhu,Luze He,Hongdong Zhang,Feng Qiu,Zhiqun Lin,Juan Peng
An intriguing morphological transition from poly(3-hexylthiophene) (P3HT) 1D nanofibers to 2D nanoribbons enabled by the addition of a series of alkylthiols is reported. First, P3HT 1D nanofibers are formed due to strong anisotropic π–π stacking between planar rigid backbones. Upon the addition of alkylthiols, P3HT nanofibers are transformed into nanoribbons associated with the crystallographic transition from edge-on orientation to flat-on orientation. The content of alkylthiols has a great influence on the P3HT morphology in the solution. The mechanism of such a morphological transformation is discussed based on the interaction between alkylthiols and P3HT chains. This work offers an effective strategy to tailor the crystal morphology and dimension of P3HT, which not only improves the understanding of P3HT crystallization but also may enable such discovery into conjugated polymer-based optoelectronic devices.
研究领域:
高分子化学
·
材料科学
·
凝聚态物理
·
纳米科技
·
有机电子学
✓ 已验证
DOI
高影响因子
ORGANIC & BIOMOLECULAR CHEMISTRY
·
2019
·Vol. 17
·期 4
·930-938
·
IF 3.49
Yue-Wei Sun,Yue-Ming Bei,Lan-Zhi Wang
Various functional 3-acyl-1,5-benzodiazepines containing carboxyl, ester and acyl groups at the 2-position were synthesized via an efficient, sustainable and catalyst-free domino reaction. During the synthesis process, one new cycle and four new bonds (one C–C, two C–N and one CC) were constructed by the nucleophilic substitution, nucleophilic addition, dehydration and cyclization reaction by the H+ shift. Furthermore, a total of 26 examples were examined by reacting inexpensive starting materials of N,N-dimethylformamide dimethyl acetal, aromatic ketones, 1,2-phenylenediamine compounds and aldehyde derivatives. Therefore, it displayed a broad substrate scope, good functional group tolerance, high yields (77–97%) and the ease of obtaining target compounds without the involvement of toxic solvents and column chromatography, which provided a novel method for the synthesis of a wide variety of biologically relevant 1,5-benzodiazepines.
研究领域:
有机化学
·
药物化学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）