ACS Applied Engineering Materials
·
2023
·
IF 0
Yu-cheng Zhang,Ya-qi Xue,Takayo Ogawa,Satoshi Wada,Jin-Ye Wang
Manufacturing biocompatible materials with higher-order structure has great significance because they can mimic the extracellular medium of the human organism and are a novel strategy for tissue regeneration. In this study, a device with stiffness-gradient characteristics based on two biocompatible materials, alginate with presolidification and photocurable acrylamide-containing supporting bath, was designed and constructed by the 3D printing technique. The presolidification can avoid rapid diffusion of alginate in aqueous solutions, improve mechanical properties without the introduction of heterogeneous gel precursor, and endow gradient stiffness by the controlled diffusion of calcium ions. Besides, a photocurable supporting bath was combined to manufacture a device with a dual-gradient structure by a 4-step procedure, including 3D printing, removal of the inner hydrogel, solidification of alginate, and curing of the supporting bath. A cylinder-like container was manufactured as the template, and the wall of the resultant container with two types of gradient structures showed parabola-like stiffness changes (open upward), resulting from calcium ion diffusion-controlled gradient solidification and alginate diffusion-controlled gradient photocuring. Moreover, the resultant device exhibited lower cytotoxicity to both adherent and suspension cells than containers manufactured with alginate. Because of the high water uptake of the photocured supporting bath, the removal of toxic metabolic products together with cell culture medium from the container leads to better cell compatibility. This diffusion-controlled device is also applicable to other additive manufacturers with biomedical significance.
研究领域:
生物材料
·
组织工程
·
增材制造
·
细胞培养
✓ 已验证
DOI
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2024
·
IF 5.8
Lei Xu,Weishuang Fang,Ying Tang,Huaicheng Xiang,Huixing Lin,Liang Fang
Co-substitution of Ce 3+ at the A-site and Nb 5+ at the B-site by smaller Ca 2+ and W 6+ in (Ce 1- x Ca x )(Nb 1- x W x )O 4 ceramics drives the structure from monoclinic fergusonite ( x = 0.1 - 0.3) to tetragonal scheelite ( x = 0.4). Adjusting the A-O and B-O bond characteristics could drastically tune the microwave dielectric properties . The ε r decreased from 20.7 to 16.2, and the negative deviations between ε r and ε r (C-M) resulted from the rattling effect of Nb 5+ /W 6+ cations in the octahedron along the b -axis direction. The τ f varied from negative (−11 ppm/°C at x = 0.1) to positive (+87.8 ppm/°C at x = 0.4), mainly attributed to the rattling effect of Nb 5+ /W 6+ . Q×f increased from 21,006 to 45,025 GHz ( x = 0.3) and then decreased to 36,563 GHZ ( x = 0.4), accompanied by increasing packing fraction and decreasing Raman FWHM. The ceramic at x = 0.15 exhibited the optimum microwave dielectric properties of ε r = 19.7, Q×f = 35,450 GHz, and τ f = 0.8 ppm/°C.
研究领域:
材料科学
·
无机化学
✓ 已验证
DOI
高影响因子
Materials Science & Engineering C-Materials for Biological Applications
·
2016
·
IF 3.42
Danfeng Cao,Yingchao Zhang,Zhanchen Cui,Yuanyuan Du,Zuosen Shi
In order to obtain an ideal material using for artificial corneal skirt, a porous polymer hydrogel containing 2-hydroxyethyl methacrylate (HEMA), trimethylolpropane triacrylate (TMPTA) and butyl acrylate was prepared through one-step radical polymerization method and the usage of CaCO 3 whisker as porogen. The physical-chemical properties of the fabricated polymer hydrogel can be adjusted by CaCO 3 whisker content, such as pore size, porosity, water content of materials and surface topography. Then a series of cell biology experiments of human corneal fibroblasts (HCFs) were carried out to evaluate its properties as an artificial corneal skirt, such as the adhesion of cells on the materials with different pore size and porosity, the apoptosis on materials with different characteristics, the distribution of the cells on the material surface. The results revealed that high porosity not only could improve water content of hydrogel, but also strengthen the adhesion of HCFs on hydrogel. In addition, high porosity hydrogel with the whisker shape of pores showed much elongate spindle-like morphology than those low porosity hydrogels. MTT assay certified that the resulted polymer hydrogel material possessed excellent biocompatibility and was suitable for HCFs growing, making it promising for being developed as artificial corneal skirt.
研究领域:
材料科学
·
组织工程
·
眼科
✓ 已验证
DOI
高影响因子
Communications Materials
·
2024
·Vol. 5
·期 1
·1-8
·
IF 7.5
Qiu Zexiong,Liu Jiale,Han Chuanzhou,Wang Chaoyang,Xiang Junwei,Zheng Ziwei,Xia Minhao,Zhou Yang,Mei Anyi,Han Hongwei
Hole-conductor-free printable mesoscopic perovskite solar cells (p-MPSCs) have attracted widespread attention for their low cost, up-scalability, and exceptional stability. However, the high defect density of perovskite and the absence of interfacial barrier layer between perovskite and carbon electrode cause profound open-circuit voltage ( V OC ) loss, which results in uncompetitive power conversion efficiency (PCE). Herein, an anion-cation synergy of decylammonium sulfate (DA 2 SO 4 ) is utilized for suppressing V OC loss of p-MPSCs via a facile post-treatment method. DA + cations transform the perovskite adjacent to carbon electrode into wide-bandgap 2D perovskite for blocking electrons, while the SO 4 2− anions interact with undercoordinated lead centers for reducing defect density. As a result, the modified device delivers an enhanced PCE from 17.78% to 19.59%, with an improved V OC from 0.98 V to 1.06 V. Meanwhile, the modified device without any encapsulation exhibits excellent moisture stability with the PCE remained almost 99% of the initial value after 528 h aging in 75% RH air at room temperature.
研究领域:
材料科学
·
能源技术
·
化学工程
✓ 已验证
DOI
高影响因子
Energy Technology
·
2022
·Vol. 10
·期 7
·2200262
·
IF 4.149
Tian Zhang,Xichuan Yang,Li Zhang,Zijian Deng,Kaiyuan Yang,Haiyang Cui,Qingning Hou,Wenxi Ji
The lattice defects in perovskite solar cells comprising polycrystalline films affect the cell's humidity stability and photovoltaic performance. Herein, a donor–pi–acceptor organic dye molecule ( ZT001 ) containing a carboxyl group on the acceptor moiety and long alkyl chains on the donor moiety is synthesized and used as an effective passivator in perovskite solar cells. It is revealed in the results that the carboxyl group of ZT001 successfully passivates the film defects by forming coordination with uncoordinated Pb 2+ , and the humidity stability of the device is improved and maintained above 80% of the original photoelectric conversion efficiency (PCE). Therefore, ZT001 -passivated perovskite devices exhibit a superior PCE of 20.6% compared with the PCE of unpassivated devices (19.5%).
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
Autophagy
·
2024
·
IF 14.6
Qin Xia,Xuan Liu,Lu Zhong,Jun Qu,Lei Dong
The calcium-activated phosphatase PPP3/calcineurin dephosphorylates TFEB (transcription factor EB) to trigger its nuclear translocation and the activation of macroautophagic/autophagic targets. However, the detailed molecular mechanism regulating TFEB activation remains poorly understood. Here, we highlighted the importance of SMURF1 (SMAD specific E3 ubiquitin protein ligase 1) in the activation of TFEB for lysosomal homeostasis. SMURF1 deficiency prevents the calcium-triggered ubiquitination of the catalytic subunit of PPP3/calcineurin in a manner consistent with defective autophagic degradation of damaged lysosomes. Mechanically, PPP3CB/CNA2 plays a bridging role in the recruitment of SMURF1 by LGALS3 (galectin 3) upon lysosome damage. Importantly, PPP3CB increases the dissociation of the N-terminal tail (NT) and C-terminal carbohydrate-recognition domain (CRD) of LGALS3, which may promote the formation of open conformers in a PPP3CB dephosphorylation activity-dependent manner. In addition, PPP3CB is ubiquitinated at lysine 146 by the recruited SMURF1 in response to intracellular calcium stimulation. The K63-linked ubiquitination of PPP3CB enhances the recruitment of TFEB. Moreover, TFEB directly interacts with both PPP3CB and the regulatory subunit PPP3R1 which facilitate the conformational correction of TFEB for its activation for the transcription of TFEB-targeted genes. Altogether, our results highlighted a critical mechanism for the regulation of PPP3/calcineurin activity via its ubiquitin ligase SMURF1 in response to lysosomal membrane damage, which may account for a potential target for the treatment of stress-related diseases.
研究领域:
细胞生物学
·
分子生物学
·
生物化学
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Huaibing Liu,Jingchao Xiao,Kuo Cao,Naiqing Ren,Haiyan He,Yixuan Li,Juntao Si,Sihan Zeng,Bicai Pan,Chunhua Chen
On account of the low operating potential and slow electrochemical kinetics, graphite anode suffers from poor rate performance and severe safety problems in lithium-ion batteries (LIBs). Therefore, it’s urgent to find alternatives. Due to the abundant intrinsic vacancies and ion migration channels, A-site deficient perovskites could be used as not only solid state electrolytes (SSEs), but also anodes for LIBs. Here, Li 0.38 Pr 0.54 TiO 3 is firstly demonstrated as a high-rate anode material without any additional modification. With an average operating potential of 0.76 V vs. Li + /Li, the Li 0.38 Pr 0.54 TiO 3 anode possesses a high specific capacity of 217 mAh g −1 at 0.1C (1C = 200 mA g −1 ), impressive rate capability (124 mAh g −1 at 40C), and excellent cycling performance (96.75 % capacity retention over 2100 cycles at 10C). Through in-situ analysis and theoretical computations, we confirm the outstanding performance originates from small cell volume change (5.98 %), low band gap (2.57 eV), and low diffusion energy barrier (0.11 eV). The LiFePO 4 //Li 0.38 Pr 0.54 TiO 3 full cell shows superior cycling stability (79.78 % capacity retention over 1000 cycles at 5C). Moreover, the relationship between A-site structure and electrochemical properties is discussed from the perspective of vacancy concentration. Our finding also provides a novel perspective for the discovery of high-performance oxide perovskite anodes.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
MATERIALS & DESIGN
·
2020
·
IF 6.289
Yuefeng Gao,Xinxiang Pan,Sai Xu,Zhijian Liu,Junsheng Wang,Kezhen Yu,Chengfa Wang,Haichao Yuan,Sen Wu
Sensitive on-line detection of Cu 2+ in lubricating oil of marine power plant is important for displaying equipment wear status and fault pre-judgment in real time. However, there are few reports on in-situ, portable and highly sensitive Cu 2+ detection devices in organic media before. In this report, CsPbBr 3 perovskite quantum dots (PQDs) are employed as fluorescence probe for Cu 2+ detection in microfluidic chip. The size effect of the CsPbBr 3 QDs on the detection performances is firstly investigated. To obtain preferable sensitivity and detection limit, polymethyl methacrylate opal photonic crystals (PMMA OPCs) film is developed as microfluidic sensor substrate, which can tremendously improve the fluorescence intensity of PQDs as high as 26-fold. The enhancement effect can be attributed to the coupling between photonic crystal stopband effect and the excitation light field. Moreover, the use of photomultiplier module for fluorescence signal measurement enables the detection device to be portable. The novel strategy offers the advantages of higher sensitivity (8.62 μM –1 ) and lower detection limit (0.40 nM). Otherwise, this sensor also provides wide detection range and good selectivity, thus, it will have potential in oil quality in-situ detection and mechanical wear prediction in the future.
研究领域:
分析化学
·
材料科学
·
环境监测
✓ 已验证
DOI
高影响因子
CHEMISTRY OF MATERIALS
·
2021
·
IF 9.811
Qinggang Zhang,Xiaochuan Sun,Weilin Zheng,Qun Wan,Mingming Liu,Xinrong Liao,Takeshi Hagio,Ryoichi Ichino,Long Kong,Huamiao Wang,Liang Li
For next-generation high-definition displays, the newly recommendation 2020 (Rec. 2020) standard calls for the emission wavelength of green emitters to be kept at 525–535 nm with narrow emission line width below 25 nm. All-inorganic lead halide perovskite CsPbBr3 nanocrystals (NCs) with sharp emission seem as the prefect one to match the call, however, it is a great challenge to tune their emission wavelength to the target window of 525–535 nm because of the intrinsic band gap of CsPbBr3. Herein, we report a facile strategy to prepare CsPbBr3 NCs with finely tunable emissions in the narrow range of 525–535 nm by establishing a CsPbBr3–Cs4PbBr6:Na Type II structure. The doping of the Na ions is the key factor to construct the Type II structure, which induces the formation of the Cs4PbBr6:Na phase and builds CsPbBr3–Cs4PbBr6:Na Type II structure, leading to the tunable emission wavelength of CsPbBr3 NCs. The as-synthesized CsPbBr3 NCs exhibit an ideal emission at 525–535 nm with a narrow emission line width of 23 nm and a high photoluminescence quantum yield (PLQY) of 85%. As a green downconverter, an ultrapure green backlight covers 97% of the Rec. 2020 standard in the CIE 1931 color space, representing the “greenest” backlight up to now.
研究领域:
材料科学
·
显示技术
·
纳米科技
✓ 已验证
DOI
高影响因子
Chinese Physics B
·
2023
·Vol. 32
·期 11
·117802
·
IF 1.7
Jiayu Tan,Yixuan Zhou,De Lu,Xukun Feng,Yuqi Liu,Mengen Zhang,Fangzhengyi Lu,Yuanyuan Huang,Xinlong Xu
Tin halide perovskites recently have attracted extensive research attention due to their similar electronic and band structures but non-toxicity compared with their lead analogues. In this work, we prepare high-quality CsSnX3 (X = Br, I) microplates with lateral sizes of around 1–4 μm by chemical vapor deposition and investigate their low-temperature photoluminescence (PL) properties. A remarkable splitting of PL peaks of the CsSnBr3 microplate is observed at low temperatures. Besides the possible structural phase transition at below 70 K, the multi-peak fittings using Gauss functions and the power-dependent saturation phenomenon suggest that the PL could also be influenced by the conversion from the emission of bound excitons into free excitons. With the increase of temperature, the peak position shows a blueshift tendency for CsSnI3, which is governed by thermal expansion. However, the peak position of the CsSnBr3 microplate exhibits a transition from redshift to blueshift at ∼160 K. The full width at half maximum of CsSnX3 broadens with increasing temperature, and the fitting results imply that longitudinal optical phonons dominate the electron–phonon coupling and the coupling strength is much more robust in CsSnBr3 than in CsSnI3. The PL intensity of CsSnX3 microplates is suppressed due to the enhanced non-radiative relaxation and exciton dissociation competing with radiative recombination. According to the Arrhenius law, the exciton binding energy of CsSnBr3 is ∼38.4 meV, slightly smaller than that of CsSnI3.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
NANOTECHNOLOGY
·
2024
·Vol. 35
·期 17
·175404
·
IF 2.9
Yafei Xu,Cong Yan,Hongfei Liang,Sheng Huang,Ping Feng,Jian Song
Silicon solar cell is the most mature photovoltaic conversion device, and in order to further improve the performance of the device, application of downshifting films has become a research hotspot. In this paper, CsPbBr3 perovskite quantum dot/EVA composite adhesive film was prepared by melting method with CsPbBr3 perovskite quantum dot film under solution processing as masterbatch and EVA particles as excipient. The effect of synthesis conditions on the luminescence properties of the composite films were thoroughly studied. The optimized CsPbBr3 perovskite quantum dot/EVA composite adhesive film has excellent performance, and its light transmission reaches 85%. The CsPbBr3 perovskite quantum dot/EVA composite adhesive film absolutely improves the efficiency of silicon solar cells by 1.08%, which is much higher than that of pure EVA adhesive film (0.63%). In addition, the device efficiencies have almost no change after 30 d in the air, maintaining the working stability of the device and contributing to industrial applications. This study provides a novel, industrial and low-cost synthesis route for the synthesis of CsPbBr3 perovskite quantum dot/EVA composite adhesive film, which is expected to have broad application.
研究领域:
材料科学
·
光伏技术
·
纳米技术
✓ 已验证
DOI
高影响因子
DYES AND PIGMENTS
·
2019
·
IF 4.018
Xiaoxia Ye,Xiaojuan Zhao,Qingyun Li,Yunfei Ma,Wenwen Song,Yun-Yun Quan,Zhencao Wang,Mingkui Wang,Zu-Sheng Huang
Four novel benzotriazole-based donor-acceptor-donor (D-A-D) type hole transport materials (HTMs) BTA1-2 and DT1-2 are synthesized to investigate the effect of the acceptors on the photovoltaic performance of perovskite solar cells (PSCs). The acceptors include nonfused core (thiophene-benzotriazole-thiophene) and fused core (dithienopyrrolobenzotriazole, DTBT). Systematical investigation reveals that the acceptor greatly influences the absorption, energy level, hole transfer and extraction, and photovoltaic performances of the HTMs. The dopant-free HTMs DT1-2 with DTBT core exhibit better hole transfer and extraction performance, and then obtain better photovoltaic performance than that of BTA1-2 . Especially, the PSC using DT2 without any dopants obtains a power conversion efficiency of 13.22%, which is outperforming than that of spiro-OMeTAD (10.41%). When doping with Li-TFSI/TBP (lithium bis(trifluoromethylsulphonyl)imide/tert-butylpyridine), DT2 -based cell achieves an improved efficiency of 15.77%. In addition, the different alkoxyl chain lengths on triphenylamine has a significant impact on the conductivity, hole mobility, hole extraction, and photovoltaic performance. The stability testing of the PSCs shows that the four HTMs based devices display improved stability than spiro-OMeTAD. These results certify that the fused acceptor core DTBT is a promising core for efficient D-A-D type HTMs towards PSCs.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）