Polymers
·
2024
·Vol. 16
·期 5
·647
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IF 4.7
Lin Qi,Teng Hang,Weijie Jiang,Sinong Li,Hui Zhang,Xiang Liang,Le Lei,Qiangqiang Bi,Hang Jiang,Yunxing Li
Microalgae are highly regarded as ideal materials for the creation of liquid biofuels and have substantial potential for growth and utilization. However, traditional storage and culture methods for microalgae are plagued by challenges such as uncontrolled growth, bacterial contamination, and self-shading among algae. These issues severely impede the photosynthetic process and the efficient extraction of biomass energy. This study tackles these problems by utilizing magnetic hydrophobic protein particles to stabilize water-in-oil Pickering emulsions. This allows for the micro-compartment storage and magnetic transfer of algae. Additionally, the successful encapsulation of Chlorella cells in high-internal-phase water-in-oil Pickering emulsions effectively mitigates the settling problem of Chlorella cells in the liquid phase, thereby enabling the potential use of Pickering emulsions for the confined cultivation of microalgae.
研究领域:
生物技术
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环境科学
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材料科学
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LANGMUIR
·
2025
·
IF 3.9
Weijie Jiang,Xin Guan,Liang Wang,Yuqian Mao,Panfei Ma,Wei Liu,Yunxing Li,To Ngai,Hang Jiang
Methods based on double emulsions for producing porous microspheres have gained popularity as an effective and adaptable strategy. However, these microspheres are frequently composed of organic polymers that lack sufficient mechanical strength. Additionally, the conventional two-step process and the use of surfactants present notable challenges. A promising solution is to replace traditional surfactants with inorganic particles, utilizing a Pickering emulsion approach. Herein, we introduced a one-step approach for creating Pickering double emulsions, followed by a straightforward solvent evaporation process to produce porous proteinaceous microspheres. By harnessing the enhanced stability of Pickering emulsions, we can manipulate the morphology and pore structure of the microspheres by varying the oil-(ethanol/water) volume ratio, the size and type of emulsifier, ripening time, rotary evaporation temperature, and the addition of enzymes. Furthermore, we innovatively proposed the coencapsulation of glucose oxide (GOx) and horseradish peroxidase (HRP) for interfacial cascade catalysis, showing excellent catalytic activity, recovery, and reusability. This study presents a new, scalable approach for producing porous microspheres using a one-step Pickering double emulsion. It demonstrates significant potential for interfacial biocatalysis, and is expected to be applied in fields such as medicine, drug delivery, and biotechnology due to their suitability for encapsulating bioactive materials.
研究领域:
材料科学
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生物技术
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医学工程
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Nature Communications
·
2024
·Vol. 15
·期 1
·1-9
·
IF 14.7
Qi Cheng,Ma Xudong,Zeng Qi,Huang Zhangwei,Zhang Shanshan,Deng Xiaokang,Kong Tiantian,Liu Zhou
Hierarchical compartmentalization, a hallmark of both primitive and modern cells, enables the concentration and isolation of biomolecules, and facilitates spatial organization of biochemical reactions. Coacervate-based compartments can sequester and recruit a large variety of molecules, making it an attractive protocell model. In this work, we report the spontaneous formation of core-shell cell-sized coacervate-based compartments driven by spontaneous evaporation of a sessile droplet on a thin-oil-coated substrate. Our analysis reveals that such far-from-equilibrium architectures arise from multiple, coupled segregative and associative liquid-liquid phase separation, and are stabilized by stagnation points within the evaporating droplet. The formation of stagnation points results from convective capillary flows induced by the maximum evaporation rate at the liquid-liquid-air contact line. This work provides valuable insights into the spontaneous formation and maintenance of hierarchical compartments under non-equilibrium conditions, offering a glimpse into the real-life scenario.
研究领域:
化学
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生物物理学
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细胞生物学
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物理化学
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ACS Nano
·
2025
·
IF 16
Xue-Mei Dong,Chen Chen,Yin-Xiang Li,Hong-Chao Sun,Bin Liu,Zi-Fan Li,Kai-Li Wang,Zi-Xi He,Meng-Na Yu,Wei Huang,Ju-Qing Liu
Neuromorphic vision sensors capable of multispectral perception and efficient recognition are highly desirable for bioretina emulation, but their realization is challenging. Here, we present a cocrystal strategy for preparing an organic nanowire retinamorphic vision sensor with UV–vis–NIR perception and fast recognition. By leveraging molecular-scale donor–acceptor interpenetration and charge-transfer interfaces, the cocrystal nanowire device exhibits ultrawide photoperception ranging from 350 to 1050 nm, fast photoresponse of 150 ms, high specific detectivity of 8.2 × 1012 Jones, and responsivity of 15 A W–1, as well as retina-like photosynaptic plasticity behaviors. Utilizing the sensor nerve and convolutional neural network, the architecture achieves 90% accuracy in recognizing colorful images. The cocrystal design offers an effective method for constructing nanowire photosynases with high performance in artificial visual systems.
研究领域:
材料科学
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神经形态工程
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光电传感
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Journal of Energy Chemistry
·
2025
·
IF 14.9
Weiting Gao,Jiajun Li,Xuelang Gao,Qinglin Liu
Anion exchange membranes (AEMs) are pivotal for advancing fuel cells and water electrolysis. However, their widespread adoption is hindered by the sluggish ion transport and inadequate durability. Herein, by tuning the number of conjugated aromatic rings and the branching sites within the monomers, a series of hyperbranched poly(aryl piperidinium) AEMs with coplanar polycyclic aromatic units are prepared to address the poor mechanical properties of rigid conjugated AEMs. The results indicate that the introduction of planar-conjugated triphenylene (TY) units in the polymer backbone facilitates ordered interchain aggregation driven by π-π stacking interaction to form well-defined ion-conductive channels while suppressing excessive swelling and enhancing the membrane stability. The hyperbranched AEM containing the TY units (QTPTY) possesses excellent mechanical properties with 55.9 MPa of stress and 60.3% of strain. Additionally, the QTPTY membrane achieves an exceptional OH − conductivity of 146.4 mS cm −1 at 80 °C, with 94.7% conductivity retention and mechanical properties reduction below 2% after 1600 h in 2 M NaOH. In an H 2 /O 2 fuel cell, QTPTY delivers a peak power density of 1.43 W cm −2 , surpassing linear and the other two π-conjugated hyperbranched analogs. In water electrolysis, the AEM exhibits a current density of 2.30 A cm −2 at 1.80 V, exceeding the 2026 targets of the U.S. Department of Energy. This work demonstrates that planar-conjugated hyperbranched architectures have a significant potential in designing robust, high-performance AEMs for sustainable energy technologies.
研究领域:
材料科学
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能源技术
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高分子化学
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电化学
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可持续能源
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2024
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IF 4.3
Junmei Fan,Ruitao Zhu,Wei Han,Hongfei Han,Liping Ding
Flavonoids are a kind of natural polyphenols which are closely related to human health, and the identification of flavonoids with similar structures is an important but difficult issue. We herein easily constructed a powerful fluorescent sensor ensemble by using surfactant cetyltrimethylammoniumbromide (CTAB) encapsulating two commercially available fluorescent probes ( F1 and F2 ) with multi-wavelength emission. Fluorescence measurements illustrate the present sensor ensemble exhibits turn-off responses to flavones and flavonols but ratiometric responses to isoflavones, owing to different FRET processes. The heat map and linear discriminant analysis (LDA) results show that this single sensor can effectively distinguish 6 flavonoids belong to three subgroups by collecting the fluorescence variation at four typical wavelengths. Moreover, it can be applied to identify different flavonoids even in biofluids like serum and urine, providing potential practical application.
研究领域:
分析化学
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生物医学
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分子生物学
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JOURNAL OF MEMBRANE SCIENCE
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2013
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IF 4.093
Zhiming Yang,Zhaogen Wang,Xueping Yao,Xiaoqiang Chen,Yong Wang
Fluorescent polymeric spheres with uniform sizes are of great interests in the measurement and calibration of the pore sizes and defects of porous media, including separating membranes. We reported the preparation of such nanospheres by dissolving amphiphilic block copolymers of polystyrene- block -poly(2-vinyl pyridine) (PS- b -P2VP) together with chromophores (perylene and pyrene) in acetic acid at elevated temperatures. Micellar nanosphere with the chromophores residing in the cores were formed through the heating-enabled micellization process. Following quaternization of the P2VP coronae gave the spheres a positively charged surface and a good water dispersibility. Scanning and transmission electron microscopy and dynamic light scattering analysis confirmed that the micellar nanospheres were uniform in size both in the dry and wet state. The micelle size and the thickness of coronae can be tuned by altering the molecular weight of the constituent blocks. Encapsulation of chromophores in the micelle cores provided a strong fluorescent emission to the micellar nanospheres, while quaternization of the P2VP coronae gave the nanospheres a greatly variable size according to pHs and salt concentrations in the surroundings. Taking advantages of their uniform size, water dispersibility, and fluorescent emission for accurate detection, we demonstrated that the micellar nanospheres were capable of characterizing pore sizes of separating membranes and detecting their large-pore defects.
研究领域:
材料科学
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化学工程
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JOURNAL OF CHROMATOGRAPHY A
·
2024
·
IF 3.8
Yibo Yan,Ruilin Yang,Yanan Wang,Yinan Wu,Xiaofei Gu,Xiaoqiang Qiao
Styrene-maleic acid (SMA) copolymer has received much attention for its excellent solubilization characteristics. In this work, SMA copolymer brush-based chromatographic stationary phases were exploited and developed for the first time. First, SMA copolymer brush was in situ grown on the surface of spherical silica via living/controlled reversible addition-fragmentation chain transfer (RAFT) polymerization method. Subsequently, as a proof-of-concept demonstration, the copolymer was esterified by diethylene glycol mono-2-ethylhexyl ether (DGME) and 2-(2-ethylhexyloxy) ethanol (EHOE), respectively. The obtained Sil-SMA-DGME and Sil-SMA-EHOE copolymer-brush chromatographic stationary phases were characterized by transmission electron microscopy, Fourier transform infrared spectrometer, X-ray photoelectron spectroscopy, and thermogravimetric analysis, respectively. The chromatographic retention mechanism indicated that both the two packed columns exhibited hydrophilic/reverse mixed-mode retention modes. The maximum column efficiency was up to 71,000 N/m. The chromatographic separation performance evaluation indicated that the novel kind of stationary phases had excellent separation capabilities for hydrophilic, hydrophobic compounds and phospholipid standards. In addition, by combination with mass spectrometry identification, the Sil-SMA-DGME column was further exploited for separation and identification of phospholipids in human lung cancer cells. Totally, 9 classes including 186 phospholipid species were successfully identified. The results demonstrated the promising application prospects of the novel kind of SMA copolymer-brush chromatographic stationary phases.
研究领域:
分析化学
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材料科学
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生物技术
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FOOD HYDROCOLLOIDS
·
2023
·
IF 10.7
Yajuan Sun,Chenglei Wang,Hang Jiang,Bingtian Zhao,Cheng Yang,Yunxing Li
Herein we reported highly biocompatible and stable oil-in-water-in-oil (o/w/o) Pickering double emulsions (PDEs) using a one-step emulsification procedure. Natural phytosterol (PS) particles and chitosan (CS) self-assembled into PS/CS complex paritlces to serve as particulate stabilizers while gelatin was used as viscosity modifier for aqueous phase. By varying the viscosity of aqueous phase, water/oil volume ratio, and homogenization time, the formation and stabilization mechanism of o/w/o PDEs were explored. The viscosity of aqueous phase and occurrence of phase inversion are essential for the formation of PDEs. Additionally, the adsoprtion of PS/CS complex particles on the oil/water interface and high viscosity of aqueous phase both aid in the stabilization of PDEs. Furthermore, the o/w/o PDEs showed good storage stability at 4 °C and 25 °C (at least 2 months), with essentially little change in emulsion structure . And a variety of oils can be used to prepare the PDEs. What's more, the o/w/o PDEs can co-encapsulate hydrophilic and hydrophobic bioactive compounds , shielding them against UV exposure and long-term storage. In summary, these findings will not only aid in the development of biocompatible o/w/o PDEs, but also provide a guidance for co-encapsulating and protecting bioactive compounds that are both hydrophilic and hydrophobic.
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Advanced Science
·
2023
·Vol. 10
·期 30
·2303944
·
IF 15.1
Xuemei Dong,Chen Chen,Keyuan Pan,Yinxiang Li,Zicheng Zhang,Zixi He,Bin Liu,Zhe Zhou,Yueyue Wu,Dengfeng Zhang,Hongchao Sun,Xinkai Qian,Min Xu,Wei Huang,Juqing Liu
Neuromorphic vision based on photonic synapses has the ability to mimic sensitivity, adaptivity, and sophistication of bio-visual systems. Significant advances in artificial photosynapses are achieved recently. However, conventional photosyanptic devices normally employ opaque metal conductors and vertical device configuration, performing a limited hemispherical field of view. Here, a transparent planar photonic synapse (TPPS) is presented that offers dual-side photosensitive capability for nearly panoramic neuromorphic vision. The TPPS consisting of all two dimensional (2D) carbon-based derivatives exhibits ultra-broadband photodetecting (365–970 nm) and ≈360° omnidirectional viewing angle. With its intrinsic persistent photoconductivity effect, the detector possesses bio-synaptic behaviors such as short/long-term memory, experience learning, light adaptation, and a 171% pair-pulse-facilitation index, enabling the synapse array to achieve image recognition enhancement (92%) and moving object detection.
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Energy Storage Materials
·
2023
·
IF 20.4
Chen Wu,Jieming Hu,Hanxian Chen,Chengyi Zhang,Mingli Xu,Lin Zhuang,Xinping Ai,Jiangfeng Qian
Prussian blue analogues (PBAs) have been attracting intense attention owing to its two-electron storage capability and considerable cost advantage, especially in Na-ion and K-ion batteries. However, things are quite different when it comes to Li-ion batteries, because lithium-containing Li 4 Fe(CN) 6 precursor is not commercially available and thus the traditionally prepared Li-deficient FeFe(CN) 6 products fail to couple with commercial graphite anode for full cells. Herein, we put forward a potential matching principle to guide the chemical pre-lithiation of FeFe(CN) 6 into a Li-rich Li x FeFe(CN) 6 ( x varies from 0 to 2) cathode. The potential matching principle was convincingly confirmed by theoretical analysis and over-lithiation experiments. Perylene-Li reagent was elaborately screened to serve as both Li + and electron donor for controllable chemical lithiation reaction while preserving the host framework stable. Our work provided a general guiding principle and effective methodology for controllable synthesis of Prussian blue analogues in gradient lithiation depth, which could be served as a platform for in-depth, systematic and comprehensive research on the properties of PBAs materials.
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MICROCHIMICA ACTA
·
2018
·Vol. 185
·期 2
·1-7
·
IF 5.705
Yang Meiding,Zhou Huipeng,Zhang Yunyi,Hu Zhenzhen,Niu Niu,Yu Cong
A new water soluble fluorescent coronene probe (CTCA) was synthesized and is shown to display strong fluorescence (with excitation/emission maxima at 313/450 nm) in aqueous solution. Dopamine was oxidized under air to form polydopamine (PDA) which quenches the fluorescence of CTCA. The enzyme acetylcholinesterase (AChE) is known catalyze the hydrolysis of acetylthiocholine to produce thiocholine. Thiocholine inhibits the polymerization of DA, and this leads to recovery in CTCA fluorescence. These findings form the basis for a new method for detection of AChE activity. The assay has a detection limit as low as 0.05 mU·mL −1 of AChE. It is highly selective, and other enzymes do no noticeably interfere. It was applied to the determination of AChE activity in (spiked) human serum, and of AChE inhibitors in (spiked) lake water samples.
Controlled synthesis of polydopamine for the highly sensitive and selective sensing of AChE activity is reported for the first time.
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