Science of Advanced Materials
·
2024
·Vol. 16
·期 11
·1150-1156
·
IF 0.9
Yang Shiqing,Lian Yunfei,Song Ge,Ni Huiyan,Jia Beidi,Qian Xinyu,He Guanxu,Ullah Aftab,Qi Xueyong
Background: The uterine endometrium plays a important role in the processes of fertilization and embryogenesis, with its impairment or dysfunction leading to pathologies such as intrauterine adhesions, miscarriage, and infertility. In addressing endometrial damage, the application
of stem cell has attracted considerable attention. To promote the paracrine capabilities of mesenchymal stem cells (MSCs), this study employed pro-inflammatory cytokines (Tumor Necrosis Factor-α and Interferon-γ, TNF-α and IFN-γ, IT) along with 3D culture techniques
on pretreated MSCs (3D-IT-MSCs). We focused on evaluating the therapeutic potential of 3D-IT-MSCs and elucidating the mechanisms involved in endometrial repair. Method: Pretreated MSCs were co-cultured with human umbilical vein endothelial cells (HUVECs) or drug-induced endometrial
stromal cells (ESCs) to observe the promoting effect on biological function. Results: The findings demonstrated that 3D-IT-MSCs exhibit markedly elevated paracrine molecule expression and secretion compared to conventional MSCs. Additionally, treatment with 3D-IT-MSCs significantly
promoted the proliferation and migration of HUVECs and ESCs, resulting in increased HUVECs angiogenesis and inhibition of mifepristone-induced ESCs apoptosis. Conclusion: Our findings demonstrated that the combined approach of applying pro-inflammatory cytokines and 3D culture techniques
on pretreated MSCs holds substantial promise as a therapeutic strategy for repairing endometrial injuries.
研究领域:
生殖生物学
·
干细胞治疗
·
组织工程
·
再生医学
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DOI
高影响因子
Science of Advanced Materials
·
2024
·Vol. 16
·期 8
·891-898
·
IF 0.9
Shi Yurou,Dou Peng,Fu Gaojie,Xie Chenyan,Shen Bin
Adsorption is intensively considered to be the most feasible and economical option for aged transformer oil treatment. In this work, five aminated hyper-crosslinked polymers were prepared from chloromethylated polystyrene–co-divinylbenzene (Cl-PS-DVB) through a two-stage modification
of crosslinking and five different reagents aminating. After modification, the specific surface area (SBET) and nitrogen content (CN) of prepared resins were greatly improved. To evaluate the reclamation performance of resins for removing oxides and contaminants from
aged transformer oils, the total acid number (TAN) and color of oils were mainly examined. The results shown that the prepared resins have superior oil reclamation capacity compared to commercial resin XAD-4 due to their higher microporous specific surface area (Smic) and surface
polarity. Among them, the NHC-R3, which used dimethyltriamine (DETA) as an aminating agent, had the best deacidification and decolorization performance. A series of experiments were designed to investigate the optimal regeneration program conditions for NHC-R3, and the additional electrical
characteristics of the reclaimed oil, including breakdown voltage, dielectric dissipation factor (DDF), and interfacial tension, were measured as evidence that aged oil was successfully reclaimed.
研究领域:
材料科学
·
环境工程
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DOI
高影响因子
Science of Advanced Materials
·
2019
·Vol. 11
·期 8
·1133-1139
·
IF 1.158
Wu Hai-Zhi,Meng Li-Fen,Song Wen-Guang
A novel and highly sensitive method for the selective trace analysis for lead (Pb2+) and cadmium (Cd2+) ions was reported, based on glutathione-modified silver nanoparticles and Fe3O4 magnetic nanoparticles. The presence of Pb2+
and Cd2+ induces the aggregation of AgNPs through cooperative metal-ligand interaction, and the aggregations were loaded on Fe3O4 magnetic nanoparticles as sorbents. After adsorption, phase separation was performed by centrifugation and the enriched analyte
in the sedimented phase was eluted by HCl solution and determined by flame atomic absorption spectrometry. The effects of experimental conditions including pH of sample solution, the volume of GSH-AgNPs, the mass of sorbent, type and volume of eluent, the effect of foreign ions were evaluated
in order to enhance sensitivity of the method. Under the optimal conditions, the enrichment factor of 60 was achieved with a sample volume of 10 mL. The detection limit of this method for Cd and Pb were 0.13 and 1.25 μg L–1, and the relative standard deviation were
1.5% and 1.8% at 10 μg L–1 concentration level of Pb and Cd, respectively. The method was successfully applied for these metals content evaluation in environmental water samples with satisfactory results.
研究领域:
环境化学
·
分析化学
·
纳米材料
·
痕量金属分析
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DOI
高影响因子
Science of Advanced Materials
·
2016
·Vol. 8
·期 7
·1478-1483
·
IF 1.812
Chai Yong-Ming,Shang Xiao,Han Guan-Qun,Dong Bin,Hu Wen-Hui,Liu Yan-Ru,Li Xiao,Liu Chen-Guang
A simple sol–gel thermolysis method has been utilized to prepare plate-like Ni3N films supported on nickel foam (Ni3N/NF) as electrocatalysts for oxygen evolution reaction (OER). The as-prepared samples have been characterized by X-ray diffraction (XRD),
scanning electron microscopy (SEM) and X-ray photoelectron spectra (XPS). XRD shows a typically crystal phase of Ni3N on nickel foam. The broad peak of (100) suggests smaller particle size of Ni3N on NF. SEM images confirm that Ni3N films cover on the surface
of NF. Ni3N films are composed of many uniform nanoparticles, implying larger surface area and more exposed active sites. Electrochemical measurements show that Ni3N/NF exhibits superior OER activity with excellent stability, which can be attributed to more active sites
and the enhanced conductivity derived from NF as support. Ni3N/NF as electrocatalysts for OER may provide novel idea for preparing highly active electrocatalysts from non-noble metallic nitrides.
研究领域:
材料科学
·
电化学
·
催化
·
能量存储与转换
✓ 已验证
DOI
高影响因子
Science of Advanced Materials
·
2015
·Vol. 7
·期 5
·985-992
·
IF 2.598
Sun Yue,Liu Jiangang,Wang Haiyang,Yu Xinhong,Xing Rubo,Han Yanchun
Bicontinuous phase structure in Poly(3,3 -didodecylquaterthiophene) (PQT-12)/[6,6]-phenyl-C71-butyric acid methyl ester (PC71BM) blend films was formed by using thiophene as solvent to suppress the compatibility between PC71BM and side chains of PQT-12. The interaction
between PQT-12 chains was enhanced and the interaction between PC71BM and PQT-12 was weakened in thiophene because of the good compatibility of thiophene with PQT-12 and its planar molecular structure. Thus, the energy barrier for PC71BM nucleation was overcome. As a
result, spherical PC71BM domains surrounded by the continuous phase of PQT-12 were formed after spin-coating. This structure was not stable and secondary phase separation was induced by thermal annealing. During thermal annealing, adjacent spherical PC71BM domains grew
and connected together, which cut off PQT-12 continuous phase. Subsequently, the PQT-12 phase grew further and connected again. At last, bicontinuous structure was formed. The power conversion efficiency of the device prepared from solution in thiophene was almost 1.9 times of the one from
chloroform.
研究领域:
材料科学
·
有机电子学
·
聚合物物理
·
光伏技术
✓ 已验证
DOI
高影响因子
Science of Advanced Materials
·
2014
·Vol. 6
·期 6
·1091-1098
·
IF 2.908
Chen Lu-Ya,Zhang Wei-De
Composite photocatalysts based on graphite-like carbon nitride (g-C3N4) and SnO2 nanoparticles were prepared by heating a mixture of SnO2 nanoparticles and melamine in a muffle furnace. The as-synthesized samples were characterized by X-ray
diffraction, scanning electron microscopy, transmission electron microscopy, ultraviolet-visible light absorbance spectra, FT-IR and TG analyses. The kinetic constant over an optimized nanocomposite catalyst was 1.37 h–1, which was 4.54 times higher than that over the pristine
g-C3N4 towards the decomposition of rhodamine B under visible light. The significantly higher photocatalytic activity of the composite photocatalysts was attributed to the enhancement of electron–hole separation at the interface between g-C3N4
and SnO2.
研究领域:
材料科学
·
光催化
·
纳米技术
✓ 已验证
DOI
高影响因子
Science of Advanced Materials
·
2017
·
IF 1.671
Wang Jin,Zhang Haoran,Lei Bingfu,Dong Hanwu,Zhang Haiming,Liu Yingliang,Zheng Mingtao,Xiao Yong
Red-emitting nitridoaluminosilicate phosphor CaAlSiN3: Eu2+ was prepared by high temperature solid-state reaction method using calcium hydride (CaH2) as the reducing agent and calcium source. Influence of synthesis temperature on the crystalline structure,
morphology and photoluminescence properties of CaSiAlN3: Eu2+ was examined in detail. It was found that samples synthesized at low (1300∼1470 °C) or high (1650∼1700 °C) temperatures, had relatively poor composition, structural properties and performance,
such as wider half peak width and lower photoluminescence intensity. Meantime, the relevance of oxygen content and photoluminescence properties was discussed. After that, dependence of photoluminescence and diffuse reflection spectra on Eu2+ ion concentration was investigated. The
series of Ca1–x
Eu
x
AlSiN3 (x = 0.005∼0.12) phosphors showed broad excitation and absorption bands (200∼600 nm) and their peak positions redshifted from 642 to 681 nm with the Eu2+ ion content increasing. Surprisingly,
red persistent luminescence was observed in CaAlSiN3: Eu2+ with a longer duration in low Eu2+ concentration regions (x ≤ 0.01).
研究领域:
材料科学
·
发光材料
·
固态化学
·
荧光粉技术
✓ 已验证
DOI
高影响因子
Science of Advanced Materials
·
2017
·
IF 1.671
Zheng Jiayu,Li Liyi,Peng Mingying
Unusually, valent Bi2+ ions doped into solids can exhibit near ultraviolet or blue excitation and red emissions. Previously the ion has only been found stabilized in compounds such as borate, sulfate or phosphate, and has not yet been reported in other types of compounds.
In this work, we found that Bi2+ can also survive in CaAl12O19. Time resolved emission spectra reveal that there are two types of Bi2+ ions in the compound due to the substitution of calcium lattice sites. Both types of Bi2+ ions show
blue excitations and red emissions, with energy transfer occurring from the longer wavelength emission center to the shorter wavelength emission center. As bismuth content x increases, Bi2+ luminescence intensifies at first, but is then quenched afterwards when x exceeds
0.3 mol%. The dominant mechanism of quenching was found to be due to electric quadrupole–quadrupole rather than exchange interactions. This work suggests that CaAl12O19:Bi2+ is a potential red phosphor for application in white light LEDs (WLEDs).
研究领域:
材料科学
·
光学材料
·
固态化学
·
光子学
·
LED技术
✓ 已验证
DOI
高影响因子
Science of Advanced Materials
·
2017
·
IF 1.671
Li Zhaozhi,Li Yuebin,Zhang Xianghui,Wang Lin,Hu Bo,Zhang Yi,Gu Haoshuang,Chen Wei
Near infrared (NIR)-to-visible upconversion nanoparticles of pure hexagonal phase β-NaYF4: Yb3+, Er3+ nanocrystals were successfully synthesized by a high boiling temperature organic phase synthesis strategy in oleic acid (OA), which acted
as a ligand. The upconversion photoluminescence intensity of the nanocrystals was modulated by varying the reaction temperature and the concentration of sensitizer Yb3+ ions and activator Er3+ ions. The prepared nanocrystals were investigated by transmission electron
microscopy (TEM), X-ray powder diffraction (XRD), and photoluminescence spectroscopy. All the results show that the as-prepared monodispersed upconversion nanocrystals emit high photoluminescence when excited by a 980 nm laser. It was found that the up-conversion emission spectra of β-NaYF4:
Yb3+, Er3+ presented three peaks at about 655, 540, and 521 nm. The optimized concentrations of the sensitizer Yb3+ and the activator Er3+ are 20% and 2% mmol, respectively. These highly efficient nanocrystals have exhibited great potential in bioimaging
and photoelectronic devices.
研究领域:
材料科学
·
纳米技术
·
光学材料
·
光子学
·
发光光谱学
✓ 已验证
DOI
高影响因子
Science of Advanced Materials
·
2017
·Vol. 9
·期 12
·2223-2233
·
IF 1.671
Tan Haihu,Xie Shaowen,Xu Jianxiong,Li Na,Zhang Changfang,Xu Lijian,Zheng Jie
Rational design and fabrication of multimodal imaging nanoprobes are of great significance for many imaging applications. Here, we report the systhesis of water-soluble hexagonal NaYF4:Yb, Er up-conversion phosphors (UCPs) with branched structure by hexadecylpyridinium chloride
(CPC) and tri-sodium citrate (Na3Cit) binary cationic/anionic capping agents assisted hydrothermal reaction. The crystal phase, morphology, and size of NaYF4:Yb, Er UCP were controlled by the concentration of Na3Cit and CPC, molar ratio of NaF:RE3+,
hydrothermal temperature, hydrothermal time, as well as analyzed by transmission electron microscopy (TEM), high-resolution TEM (HRTEM), X-ray diffraction (XRD). By tuning and optimizing hydrothermal conditions, NaYF4 UCPs experienced the phase transition from pure cubic phase to
mixed cubic/hexagonal phases to pure hexagonal phase, as well as morphology changes from spherical nanoparticles to short pillar structures, and ultimately to branched structures. Due to the special geometrical shape, the branched NaYF4:Yb, Er UCPs could be blended with host materials
without further surface modification. As a proof-of-concept, branched NaYF4:Yb, Er phosphors were then incorporated into polyvinyl alcohol (PVA) matrix to develop a novel luminescence composite film. The resulting PVA/NaYF4:Yb, Er composite film possessed optical transparence
at daylight and emitted green fluorescence at the irradiation of a 980 nm laser. NaYF4:Yb, Er phosphors and hybrid PVA/NaYF4:Yb, Er demonstrate high potential of fluorescent materials used for anti-counterfeiting and other optical applications.
研究领域:
材料科学
·
纳米技术
·
光学材料
·
发光学
·
防伪技术
✓ 已验证
DOI
高影响因子
Science of Advanced Materials
·
2023
·Vol. 15
·期 12
·1621-1628
·
IF 0.9
Tang Hongmei,Deng Zhe,Zhao Tianlan
This research was aimed to explore the application of chitosan (CS) nanoparticles (NPs) loaded with vascular endothelial growth factor (VEGF) in rat skin injury. Method: the VEGF-loaded CS NPs (VEGF/CS-NPs) were prepared, and a skin injury model on the back skin of rats was established.
The VEGF/CS-NPs were applied to the injury model to observe the skin changes in the wound area of each group, compare the healing rate, the number of micro-vessels, and VEGF expression in each group of rats, so as to explore the intervention effect of VEGF/CS-NPs in skin injury. Results:
the prepared VEGF/CS-NPs were spherical or quasi-spherical in morphology, uniformly dispersed, with smooth surfaces and relatively uniform size. The average particle size (PS) of the blank CS-NPs was 267.5 nm± 25.3 nm, while that of the drug-loaded CS-NPs was 298.6 nm ±44.7 nm,
and the PS distribution was also very concentrated. The genipin cross-linked NPs could effectively prevent the degradation of the spherical wall and achieve the slow release of VEGF. After VEGF was applied to rats in the form of NPs, its healing rate and micro-vessel count were markedly superior
to those of VEGF injection alone and blank group (P < 0.05), and VEGF expression in skin injury tissues was also greatly increased (P < 0.05). Conclusion: VEGF/CS-NPs could improve the bioavailability of VEGF and promote the healing of rat skin injuries.
研究领域:
药学
·
生物医学工程
·
组织工程
·
伤口愈合
✓ 已验证
DOI
高影响因子
Science of Advanced Materials
·
2019
·Vol. 11
·期 3
·418-424
·
IF 1.158
Lv Yao,Huang Shifei,Zhao Yufeng
The N-B-F tridoping 3D hierarchical porous graphitized carbon network is produced by a one-step synthesis using chitosan as a precursor. The N-B-F tridoping 3D hierarchical porous graphitized carbon network is rich of nitrogen, boron and fluorine hetero atoms and exhibited relatively
high specific capacitance value of 316 F g–1 in 6 M KOH at a current density of 20.0 A g–1. As well as good cycling stability with capacitance retention of 100% over 10000 cycles, and good rate performance (90.3% capacity retention from 0.5 A g–1
to 20.0 A g–1). When used as supercapacitor electrode, the all carbon symmetric supercapacitor based on N-B-F tridoping 3D hierarchical porous graphitized carbon network delivers a high energy density of 23.87 Wh kg–1, outperforming the state-of-the-art carbon
material.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）