ORGANIC ELECTRONICS
·
2021
·
IF 3.721
Xiaowen Zhou,Yu Zhao,Wenzhe Huang,Yuanyuan Wu,Zhongen Wu,Gufeng He
Perovskite lighting-emitting diodes (PeLEDs) with inverted structure have been considered as promising display technology due to their suitable driving schemes with n-type thin-film transistors. However, the defects and imbalanced charge carriers in the CsPbBr 3 nanocrystal (NC) PeLED are key hurdles, limiting the performance. Herein, we have successfully doped Zn 2+ ions into CsPbBr 3 NCs by ligand-assisted reprecipitation method, exhibiting an 85% enhancement of the photoluminescence quantum yield (PLQY). In addition, the optimized energy level alignment via Zn doping facilitates the carrier balance in the devices, improving the efficiencies. The obtained CsPbBr 3 :Zn-based PeLED reaches a high luminance of 3124 cd/m 2 and a maximum external quantum efficiency (EQE) of 0.85%, which are superior to those of CsPbBr 3 -based PeLED (luminance = 564 cd/m 2 , EQE = 0.09%). The results demonstrate that Zn doping significantly enhances the performance of PeLED, which increases the potential of these inverted PeLEDs connected with n-type TFTs towards practical applications.
研究领域:
材料科学
·
光电子学
✓ 已验证
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2015
·
IF 3.453
Hong Jiang,Qing Yan,Rizhi Chen,Weihong Xing
Pd@ZIF-8 nanoparticles with uniform size and morphology were prepared via an assembly method that enables the crystallization of ZIF-8 in methanol in the presence of polyvinylpyrrolidone (PVP)-modified Pd nanoparticles. The molar ratios of Pd/Zn 2+ and 2-methylimidazole (Hmim)/Zn 2+ are important parameters affecting the physical and catalytic properties of the Pd@ZIF-8. The catalytic activities of the hybrid catalysts were evaluated by the hydrogenation of p -nitrophenol to p -aminophenol. The results indicate that the increase of Pd loading and p -nitrophenol conversion can be tuned by adding more amounts of PVP-Pd colloid, but a suitable amount of PVP-Pd (Pd/Zn 2+ ≤ 0.012) is helpful to the control of particle size of Pd@ZIF-8 and encapsulation of the Pd nanoparticles within the ZIF-8 crystals. Pd@ZIF-8 catalysts prepared with excessive or equal molar of Hmim relative to Zn 2+ have similar morphology and uniform particle size, where the Pd nanoparticles are fully confined within the ZIF-8 crystals without aggregation. Furthermore, the Pd@ZIF-8 catalysts exhibit the better catalytic performance for the p -nitrophenol hydrogenation owing to the high loading of well-dispersed Pd nanoparticles with the decreased Hmim/Zn 2+ molar ratio. This work would aid the development of high-performance Pd@ZIF-8 catalysts.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
PREPARATIVE BIOCHEMISTRY & BIOTECHNOLOGY
·
2018
·
IF 1.241
Mingcong Shao,Lili Xiu,Haijiang Zhang,Jianying Huang,Xingwen Gong
Chitosan/cellulose-based beads (CCBs) for the affinity purification of histidine-tagged proteins were prepared from chitosan/cellulose dissolved in ionic liquid as a solvent, and their structures were characterized by Fourier transform infrared spectroscopy, transmission electron microscopy, and thermogravimetric analysis. The affinity purification was used to separate hexahistidine-tagged (his-tagged) enhanced green fluorescent protein (EGFP) from Escherichia coli. The results showed that Zn2+–CCB exhibited more specific adsorption capacity toward the target protein compared with Ni2+–CCB and Cu2+–CCB. The maximum adsorption of EGFP was 1.84 mg/g of Zn2+–CCB, with 90% purity under the optimized conditions (ionic strength (1.0 M NaCl), pH (7.2) and imidazole concentration (500 mM)). In addition, a regeneration method for the sorbent was further developed by washing with ethylenediaminetetraacetic acid disodium and then reimmobilizing with metal ions. This technique is an alternative method for the purification of his-tagged proteins, making the process more economical, fast, stable, and large batch.
研究领域:
生物化学
·
蛋白质工程
✓ 已验证
DOI
PubMed
高影响因子
TETRAHEDRON LETTERS
·
2016
·
IF 2.347
Ben Dong,Baoyan Li,Yi Cao,Xinlei Meng,Han Yan,Shusheng Ge,Yun Lu
Two series of thiophene oligomers and terthiophene oligomers consisting of both thiophene and indole moieties have been synthesized. They have same excitation-dependent photoluminescence characteristics, but different bandgaps and absorption behaviors, which relates to the number and denseness of indoles in the conjugated oligomers and the length of alkyl chains on indole moiety due to varied the π-π stacking interaction of conjugated structures in the as-prepared oligomers. A simple electrochromic device based on such a conjugated oligomer displays a novel four-color electrochromism from red to yellow, green and puce with the increased potential and possesses good environmental and redox stability. Such conjugated oligomer also exhibits high sensitivity and selectivity for Zn 2+ detection.
研究领域:
材料科学
·
光电化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yuanwei Chu,Tingting Luo,Jingcheng Li,Hong Zhang,Wenjing Dai,Yingning Zhou,Yijin Zhang,Yaweixue Deng,Bo Zou,Junchen Chen,Yun Huang,Mingshan Wang,Yang Gao,Xing Li
Despite the widely acknowledged and remarkable advantages of aqueous zinc-ion batteries (ZIBs), issues such as uncontrollable dendrite growth and hydrogen evolution reaction, which severely affect their rechargeable stability and cycle life. To address these issues, a dynamic Zn 2+ ions rectification interfacial layer (DRIL) was constructed via in-situ spin coating and crosslinking of hydrophilic borax-modified hydroxypropyl guar gum on the Zn anode (BHPG@Zn). During the process of in-situ crosslinking, BHPG formed a carded molecular chain structure through synergistic crosslinking with borax, which re-regulated the uniform distribution of Zn 2+ ion fluxes at the interface. Leveraging the abundant oxygen-containing functional groups on BHPG, the inherent strong hydrogen-bonding network environment formed by water molecules is disrupted through strong coupling with Zn 2+ ions, thus promoting the transportation and desolvation of Zn 2+ ions. Furthermore, the stronger binding energy and affinity between BHPG and zinc induce the formation of a (002) plane-oriented Zn deposition layer. Based on the DRIL modification, the BHPG@Zn displays stable cycling for over 7100 h at 2 mA cm −2 with coulombic efficiency of 99.3 %, while the AC@Ti||BHPG@Zn zinc-ion capacitor retains a capacity of 65 mAh g −1 after 10,000 cycles at 2 A g −1 .
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2020
·
IF 4.189
Junxiao Liu,Jin Feng,You Yu,Liandi Xu,Qi Liu,Hao Zhang,Jinglin Shen,Wei Qi
Gold nanoclusters (AuNCs) have been recognized as an emerging category of inorganic–organic hybrid luminescent materials owing to their ultrasmall size, good biocompatibility, and especially the aggregation-induced emission (AIE) property. Some works have been reported about the AIE property of AuNCs; however, the mechanism is still indistinct. In the present work, we studied the coassembly behavior of thiobarbituric acid-modified AuNCs (TBA-AuNCs) with Zn2+. The coassembly system could not only enhance the emission of AuNCs but also induce the gelation along with the morphology transformation from nanofibers to micron-sized bowknot-like aggregates. Various methods were used to characterize the properties of a hydrogel such as photoluminescent (PL) spectra, morphology, lifetime, and intermolecular interaction. Significantly, time-/temperature-dependent PL spectra as well as morphological evolution monitoring were implemented to analyze the structure–emission property relationship of TBA-AuNCs assembly systems. It is verified that the π–π stacking of ligands, ligand-to-metal charge transition (LMCT), and the orderliness degree of aggregates contribute uniquely to the emission energy/intensity of TBA-AuNCs, which is significant for the comprehension of the AIE nature of nanoclusters. Besides, the gelation and photoluminescence of TBA-AuNCs are sensitive to heating and ethylenediaminetetraacetic acid disodium salt (EDTA-2Na), making the hydrogels promising candidates as smart luminescent switches. This work is of interest for not only providing a versatile methodology for lighting up AuNCs through gelation but also pointing out a way to understand and regulate the emission of AuNCs.
研究领域:
材料科学
·
化学
·
生物医学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2016
·
IF 7.145
Meng He,Xiaoyi Chen,Kui Cheng,Wenjian Weng,Huiming Wang
The topography at the micro-/nanoscale level and bioactive composition of material surfaces have been thought to play vital roles in their interactions with cells. However, it is still a challenge to further modify special topography with biodegradable composition or vice versa. In this study, TiO2 nanorod films covered with microscale-distributed Zn-containing calcium phosphate (Zn-CaP) were prepared, trying to create a micro-/nanoscale topography and Zn2+ release capability. MC3T3-E1 cells cultured on TiO2 nanorod film with sparsely distributed Zn-CaP (TiO2/S-ZCP) had significantly higher biological responses than those on the films with densely distributed Zn-CaP (TiO2/D-ZCP) and fully covered Zn-CaP (F-ZCP). TiO2/S-ZCP film was demonstrated to facilitate osteogenic differentiation much more strongly than F-ZCP and TiO2/D-ZCP films based on evaluations of ALP, related gene expressions, and extracellular matrix mineralization. The higher osteogenic differentiation on TiO2/S-ZCP film is ascribed to the micro-/nanoscale topography from Zn-CaP coverage promoting cell adhesion and filopodia extension, and inducing differentiation-orientation in the initial stage. And consequently Zn2+ release results in enhancement of differentiation. Therefore, we believe that better organization of the micro-/nanotopography and bioactive ion release on the surface would be a promising way to enhance osteogenic activity for orthopedic and dental implants.
研究领域:
生物材料学
·
组织工程学
·
细胞生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Wei Liu,Yuanxun Li,Xinyan Liu,Yongcheng Lu
In millimeter-wave communication, signal delay becomes increasingly pronounced as the operating frequency of the equipment rises. To accelerate signal transmission, substrates with low dielectric constants (ε r < 6) are required. This study synthesized a novel microwave dielectric material, NaMg (1- x ) Zn x (PO 3 ) 3 (NMZPO), using the conventional solid-phase method. The microwave dielectric properties of NaMg(PO 3 ) 3 ceramics were enhanced by substituting Mg 2+ with Zn 2+ . Specifically, Zn 2+ doping increased the ceramics' densification and reduced dielectric loss. The NaMg 0.9625 Zn 0.0375 (PO 3 ) 3 ceramic exhibited optimal microwave dielectric properties at sintering temperature 880 °C for 4h: ε r = 4.49, Q × f = 58237.2 GHz (at 17.792 GHz), τ f = −50.6 ppm/°C. In addition, NMZPO ceramics demonstrate excellent chemical compatibility with Ag electrodes. These findings indicate that NMZPO represents a promising candidate for the next generation of ultra-low dielectric constant LTCC materials.
研究领域:
材料科学
·
通信工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2024
·Vol. 40
·期 3
·499-507
·
IF 3.1
Tao He,Ji Chengshan,Zhang Jian,Yin Yuanyuan,Jia Wenwen,Jiang Xin,Xu Jie,Yang Yulin
The abuse of tetracycline antibiotics has caused great harm to human health and ecosystems. Developing inexpensive, convenient and sensitive methods for the detection of tetracycline antibiotics is highly desirable. Herein, based on the H 4 ddp ligand [H 4 ddp=3-(3,5-dicarboxyphenyl)pyridine-2,6-dicarboxylic acid], two novel zinc-based metal-organic frameworks (MOFs) {[Zn 3 (ddp) 2 (H 2 O) 4 ]·3H 2 O} n (Zn1-ddp) and {[Zn 3 (ddp) 2 (H 2 O) 4 ]·3H 2 O} n (Zn2-ddp) were successfully designed by delicate structural regulation. Both Zn1-ddp and Zn2-ddp exhibited excellent water and chemical stability and showed excellent fluorescence quenching performance for tetracycline antibiotics. Notably, the more advanced framework structure and better fluorescent performance make Zn1-ddp more sensitive than Zn2-ddp in fluorescent detection with a detection limit of 0.29 µmol/L for tetracycline (TC), 0.09 µmol/L for doxycycline (DOX), 0.10 µmol/L for minocycline (MIN) and metacycline (MEL), 0.19 µmol/L for chlortetracycline (CTC), and 0.67 µmol/L for oxytetracycline (OTC) among tetracycline antibiotics. The fluorescence quenching mechanism of Zn1-ddp and Zn2-ddp for tetracycline antibiotics detection was deeply investigated. The reasons for the superior detection performance of Zn1-ddp over Zn2-ddp were also analyzed in depth through Fourier transform infrared spectrophotometry (FTIR), X-ray photoelectron spectroscopy (XPS) analysis and framework structure analysis. The developed method opens up a new perspective for antibiotics detection based on zinc-based MOFs.
研究领域:
分析化学
·
环境科学
·
生物医学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2023
·
IF 5.7
Fangyi Huang,Hua Su,Qin Zhang,Yuanxun Li,Qihai Lu,Xiaoli Tang
In this study, crystal structure and microwave dielectric properties of phosphate CaMgP 2 O 7 were comprehensively investigated. As a novel microwave dielectric ceramic , CaMgP 2 O 7 consists of highly dense structure with optimal microwave dielectric properties ( ε r = 7.8 ± 0.124, Q×f = 13,165 ± 836 GHz, and τ f = −85.04 ± 1.205 ppm/℃) at a low sintering temperature (950 ℃). The Rietveld refinement of XRD patterns revealed that CaMgP 2 O 7 belongs to a triclinic system with P-1 symmetry type. Moreover, the substitution of Zn 2+ for Mg 2+ in CaMgP 2 O 7 can further reduce the sintering temperature , effectively promote the densification process, and improve the Q×f value. The effects of porosity (or density) and chemical bond characteristics on the performance of CaMg 1- x Zn x P 2 O 7 ceramics were carefully analyzed as well. Outstanding performance ( ε r = 8.05 ± 0.12, Q×f = 20,670 ± 923 GHz, and τ f = −87.59 ± 3.24 ppm/℃) can be achieved for the CaMg 0.84 Zn 0.16 P 2 O 7 ceramic sintered at 875 ℃ for 3 h.
研究领域:
材料科学
·
陶瓷工程
✓ 已验证
产品关联
DOI
高影响因子
Chemical Science
·
2023
·Vol. 14
·期 18
·4824-4831
·
IF 8.4
Yong-Jun Chen,Ming Liu,Jie Chen,Xin Huang,Qiao-Hong Li,Xiao-Liang Ye,Guan-E. Wang,Gang Xu
Dangling bond formation for COF materials in a rational manner is an enormous challenge, especially through post-treatment which is a facile strategy while has not been reported yet. In this work, a “chemical scissor” strategy is proposed for the first time to rationally design dangling bonds in COF materials. It is found that Zn2+ coordination in post-metallization of TDCOF can act as an “inducer” which elongates the target bond and facilitates its fracture in hydrolyzation reactions to create dangling bonds. The number of dangling bonds is well-modulated by controlling the post-metallization time. Zn-TDCOF-12 shows one of the highest sensitivities to NO2 in all reported chemiresistive gas sensing materials operating under visible light and room temperature. This work opens an avenue to rationally design a dangling bond in COF materials, which could increase the active sites and improve the mass transport in COFs to remarkably promote their various chemical applications.
研究领域:
材料科学
·
化学传感器
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYTICA CHIMICA ACTA
·
2018
·
IF 5.123
Dan Li,Yadan Ma,Huazhen Duan,Fei Jiang,Wei Deng,Xingang Ren
A fluorescent and surface-enhanced Raman spectroscopy (SERS) dual-mode probe is developed for imaging of intracellular Zn 2+ based on N-(2-(bis(pyridine-2-ylmethyl)amino)ethyl)-2-mercaptoacetamide (MDPA) modified gold nanoparticles (MDPA-GNPs). Benefiting from the chelation-enhanced fluorescence (CHEF) between MDPA-GNPs and Zn 2+ , the fluorescent intensities of MDPA-GNPs are substantially enhanced with the increment of Zn 2+ concentrations, which can be clearly observed by the naked eye. Under physiological conditions, the probe exhibits a stable response for Zn 2+ from 1 μM to 120 μM, with a detection limit of 0.32 μM in aqueous solutions. The resultant MDPA-GNPs can be used for ultrasensitive SERS detection of Zn 2+ because of the strong inter-particle plasmonic coupling generated in the process of Zn 2+ -triggered MDPA-GNPs self-aggregation, with a low detection limit of 0.28 pM, which is eight order of magnitude lower than the United States Environmental Protection Agency (US EPA)-defined limit (76 μM) in drinkable water. More importantly, the proposed probe can be applied for efficient detection of intracellular Zn 2+ with excellent biocompatibility and cellular imaging capability. Therefore, a highly sensitive and selective nanosensor has been demonstrated for both reliable quantitative detection of Zn 2+ in aqueous solution and real-time imaging of intracellular Zn 2+ , suggesting its significant potential utility in bioanalysis and biomedical detection in the future.
研究领域:
生物分析
·
生物医学
·
化学传感
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）