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Natural and long-term preservable anticoagulant property of SiO2 and TiO2 bilayer films

Frontiers in bioengineering and biotechnology 2025年 13卷 1578099页

作者： Xiangqin Liu Xiao Chen Hongrui Jiang Zikun He Hong Sun Qiongjian Huang Ansha Zhao Nan Huang Ping Yang Jiang Chen The Department of Ophthalmology Sichuan Provincial People's Hospital University of Electronic Science and Technology of China Chengdu China. Department of Laboratory Medicine Sichuan Academy of Medical Sciences and Sichuan Provincial People's Hospital University of Electronic Science and Technology Chengdu China. Department of Stomatology The Institute of Oral Science Longgang Otorhinolaryngology Hospital of Shenzhen Shenzhen China. Key Laboratory for Advanced Technologies of Materials Institute of Biomaterials and Surface Engineering Ministry of Education Southwest Jiaotong University Chengdu China. Department of Cardiology Sichuan Provincial People's Hospital University of Electronic Science and Technology of China Chengdu China. Office of Scientific Research Chongqing Industry Polytechnic College Chongqing China. Clinical Immunology Translational Medicine Key Laboratory of Sichuan Province Sichuan Provincial People's Hospital University of Electronic Science and Technology of China Chengdu China.

Introduction:Titanium dioxide (TiO2) films have been widely studied as blood-contacting materials, but their positively charged surface and low density of surface hydroxyl (-OH) groups result in poor intrinsic anticoagulant properties. Furthermore, TiO surfaces readily adsorb carbon-containing contaminants from the environment, causing a rapid decline in anticoagulant performance during storage. Thus, improving TiO's intrinsic anticoagulant properties and extending its shelf-life remain challenging. Methods:We fabricated a bilayer film by depositing a ∼40 nm silica (SiO2) overlayer onto TiO using unbalanced magnetron sputtering. surface properties (hydrophilicity, surface charge, and contaminant adsorption) and anticoagulant performance (platelet adhesion after storage) of the resulting SiO/TiO bilayer were characterized. Results:The SiO/TiO bilayer exhibited long-lasting hydrophilicity, a net negative surface charge, minimal adsorption of carbonaceous contaminants, and a high surface -OH group content. These characteristics are attributed to the formation of interfacial Si-O-Ti bonds, which in turn led to significantly enhanced anticoagulant properties. Notably, after 15 weeks of storage, platelet surface coverage on the bilayer was less than 30% of that on a TiO-only film, indicating greatly improved long-term hemocompatibility. Discussion:By maintaining a hydrophilic, clean surface with abundant surface -OH groups, the SiO/TiO bilayer achieved superior intrinsic anticoagulant performance that was preserved over long-term storage. This bilayer approach addresses key limitations of TiO, suggesting that SiO/TiO coatings are a promising alternative to pure TiO films for blood-contacting devices.

关键词： SiO2 and TiO2 bilayer films fibrinogen long-term anticogulant property long-term superhydrophilicity platelet

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Modeling of fuzzy BN prediction of a complex multi-level system considering multiple states 65

Modeling of fuzzy BN prediction of a complex multi-level sys...

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65th Annual Technical Meeting and Exposition of the Institute of Environmental Sciences and technology, ESTECH 2019

作者： Wang, Xiaohong Wang, Yuqing Wang, Lizhi Wang, Jingbin School of Reliability and Systems Engineering Beihang University Beijing100191 China Unmanned System Institute Beihang University Beijing100191 China Key Laboratory of Advanced Technology of Intelligent Unmanned Flight System of Ministry of Industry and Information Technology Beihang University Beijing100191 China AVIC Aeronautical Radio Electronics Research Institute Shanghai201100 China

Reliability modeling of a multi-level system is of great significance to ensure safety, while also presenting new requirements in order to define a full description of the system. However, in traditional reliability research, most systems are considered to have only two states, which is often inadequate and leads to inaccurate predictions. The difference between reality and analysis can be significant such that the analyses cannot meet the needs of more complex systems. In this study, to reach a full understanding for a multi-level system, a modeling framework based on a fuzzy Bayesian Network (BN) is presented. First, state probabilities of root nodes are obtained by integrating the mature prediction model at the component-level. The logical association mapping is developed to achieve a system-level prediction. Second, fuzzy fusion theory is introduced into the BN reliability model to enable it to handle fuzzy information. Finally, by modifying the conditional probability table for the higher-level nodes, all root nodes in the BN are more finely divided into multi-states. The proposed framework is applied to a solar-power unmanned system to illustrate the validity of the model. The network and results from this framework can be used to further analyze the reliability and security of a complex multi-level system with fuzzy and uncertain information in life cycle management. © 2019 Institute of Environmental Sciences and technology. All rights reserved.

关键词： Bayesian networks

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Nucleation-controlled growth of superior lead-free perovskite Cs3Bi2I9 single-crystals for high-performance X-ray detection (vol 11, 2304, 2020)

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NATURE COMMUNICATIONS 2020年第1期11卷 2304-2304页

作者： Zhang, Yunxia Liu, Yucheng Xu, Zhuo Ye, Haochen Yang, Zhou You, Jiaxue Liu, Ming He, Yihui Kanatzidis, Mercouri G. Liu, Shengzhong (Frank) Laboratory of Applied Surface and Colloid Chemistry Ministry of Education Shaanxi Key Laboratory for Advanced Energy Devices Shaanxi Engineering Lab for Advanced Energy Technology Institute for Advanced Energy Materials School of Materials Science and Engineering Shaanxi Normal University Xi’an 710119 China Dalian National Laboratory for Clean Energy iChEM Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 China University of the Chinese Academy of Sciences Beijing 100039 China Department of Chemistry Northwestern University Evanston IL 60208 United States Electronic Materials Research Laboratory Key Laboratory of the Ministry of Education and International Center for Dielectric Research Xi’an Jiaotong University Xi’an 710049 China

An amendment to this paper has been published and can be accessed via a link at the top of the paper.

关键词： Optical materials Electronic devices

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Optical binding and lateral forces on chiral particles in linearly polarized plane waves

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Physical Review A 2020年第4期101卷 043808-043808页

作者： Hongsheng Shi Hongxia Zheng Huajin Chen Wanli Lu Shiyang Liu Zhifang Lin School of Electrical and Information Engineering Guangxi University of Science and Technology Liuzhou Guangxi 545006 China State Key Laboratory of Surface Physics (SKLSP) and Department of Physics Fudan University Shanghai 200433 China School of Physics China University of Mining and Technology Xuzhou Jiangsu 221116 China Institute of Information Optics Zhejiang Normal University Jinhua Zhejiang 321004 China Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing 210093 China

We demonstrate numerically and analytically the optical binding between a pair of chiral nanoparticles immersed in a plane wave of linear polarization. The numerical results based on the full wave simulation show that, when the electric field of the incident wave is polarized along the pair axis (the line connecting the particle pair), the closest dimer can be formed at particle separation around 1.25λ, with λ denoting the incident wavelength, while when the electric field is polarized normal to the pair axis, the nearest dimer is formed with a separation of one wavelength. In both cases, there exist multiple stable dimer states due to the spatially oscillatory decaying behavior of the binding force with the increase of particle distance. Interestingly, there also appears a lateral optical force exerted on each particle in the direction normal to both the pair axis and light flow, when either or both particles have chirality. Analytical analysis within the dipole approximation indicates that the binding force comes dominantly from the gradient of the optical potential, irrespective of particle chirality. The lateral force, on the other hand, has multiple origins. In addition to the gradient force, the radiation force, the curl force, and the spin force may make significant contributions dependent on the particle chirality, as the particles approach each other.

关键词： Light-matter interaction Mechanical effects of light on material media Chiral symmetry Optical tweezers

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Spontaneous Interface Healing by a Dynamic Liquid-Crystal Transition for High-Performance Perovskite Solar Cells

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advanced materials (Deerfield Beach, Fla.) 2022年第49期34卷 e2207362页

作者： Xinyi Du Lu Zhang Ran Chen Jiaxue You Yabin Ma Jungang Wang Yin Wu Baibai Liu Kui Zhao Jiangzhao Chen Xinbing Chen Zhongwei An Shengzhong Frank Liu Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education Shaanxi Key Laboratory for Advanced Energy Devices Shaanxi Engineering Lab for Advanced Energy Technology International Joint Research Center of Shaanxi Province for Photoelectric Materials Science Institute for Advanced Energy Materials School of Materials Science and Engineering Shaanxi Normal University Xi'an 710119 P. R. China. Key Laboratory of Optoelectronic Technology & Systems (Ministry of Education) College of Optoelectronic Engineering Chongqing University Chongqing 400044 P. R. China. Dalian National Laboratory for Clean Energy iChEM Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 P. R. China. University of the Chinese Academy of Sciences Beijing 100039 P. R. China.

Low-temperature solution processing of thin-film semiconductors is more cost-effective than traditional vacuum processing; however, it leads to more defects during fast bulk crystallization and residual tensile stress. Herein, a new strategy of dynamic liquid-crystal transition (DLCT) is developed to solve these problems in one step. The design principle is used to suggest that the DLCT molecule should firstly interact with the perovskite grains in the bulk and meanwhile go through a dynamic transition to spontaneously heal the interface. A thermotropic LC molecule (CBO6SS6OCB) is then designed to demonstrate the strategy. The LC interacting with perovskite colloid forms an intermediate adduct to retard the crystallization. The annealing processes stimulate the concentrated LC solid, causing it to flow to the electron transport layer to release the residual stress to attain improved electron extraction. Consequently, the device efficiency is increased to 24.38%, where its V of 1.184 V is among the best for the formamidine-based perovskite solar cells. Furthermore, the ambient stability (93.0% of initial efficiency after 2000 h of aging) and light stability (96.3% of initial efficiency after 500 h of aging) are much improved. This work conceives a new engineering of additive phase transition for high-performance perovskite solar cells.

关键词： crystallization retardation dynamic liquid-crystal transitions high efficiency and stability interfacial healing perovskite solar cells

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Giant Biquadratic Exchange in 2D Magnets and its Role in Stabilizing Ferromagnetism of NiCl2 Monolayer

arXiv

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arXiv 2021年

作者： Ni, J.Y. Li, X.Y. Amoroso, D. He, X. Feng, J.S. Kan, E.J. Picozzi, S. Xiang, H.J. Key Laboratory of Computational Physical Sciences Ministry of Education State Key Laboratory of Surface Physics Department of Physics Fudan University Shanghai200433 China Shanghai Qizhi Institution Shanghai200232 China Consiglio Nazionale delle Ricerche CNR-SPIN Via dei Vestini 31 Chieti66100 Italy CSIC BIST Campus UAB Bellaterra Barcelona08193 Spain School of Physics and Materials Engineering Hefei Normal University Hefei230601 China Department of Applied Physics Institution of Energy and Microstructure Nanjing University of Science and Technology Jiangsu Nanjing210094 China Collaborative Innovation Center of Advanced Microstructures Nanjing210093 China

Two-dimensional (2D) van der Waals (vdW) magnets provide an ideal platform for exploring, on the fundamental side, new microscopic mechanisms and for developing, on the technological side, ultra-compact spintronic applications. So far, bilinear spin Hamiltonians have been commonly adopted to investigate the magnetic properties of 2D magnets, neglecting higher order magnetic interactions. However, we here provide quantitative evidence of giant biquadratic exchange interactions in monolayer NiX2 (X=Cl, Br and I), by combining first-principles calculations and the newly developed machine learning method for constructing Hamiltonian. Interestingly, we show that the ferromagnetic ground state within NiCl2 single layers cannot be explained by means of bilinear Heisenberg Hamiltonian;rather, the nearest-neighbor biquadratic interaction is found to be crucial. Furthermore, using a three-orbitals Hubbard model, we propose that the giant biquadratic exchange interaction originates from large hopping between unoccupied and occupied orbitals on neighboring magnetic ions. On a general framework, our work suggests biquadratic exchange interactions to be important in 2D magnets with edge-shared octahedra. Copyright © 2021, The Authors. All rights reserved.

关键词： Magnets

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Two-dimensional (PEA)2PbBr4 perovskite single crystals for a high performance UV-detector

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Journal of Materials Chemistry C 2019年第6期7卷 1584-1591页

作者： Yunxia Zhang Yucheng Liu Zhuo Xu Haochen Ye Qingxian Li Mingxin Hu Zhou Yang Shengzhong (Frank) Liu Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education Shaanxi Key Laboratory for Advanced Energy Devices Shaanxi Engineering Lab for Advanced Energy Technology Institute for Advanced Energy Materials School of Materials Science and Engineering Shaanxi Normal University Xi’an 710119 China iChEM Dalian National Laboratory for Clean Energy Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian China

Two-dimensional (2D) metal halide perovskites have shown great potential in high performance optoelectronic applications due to their intrinsic quantum well structure, enhanced moisture- and photo-stability. Unfortunately, there is still no effective method to produce large-size 2D hybrid perovskite single crystals, and consequently there is lack of research on its optoelectronic applications. Herein, we report the utilization of a controlled evaporation process to grow well-defined large-size (>200 mm²) 2D (PEA)₂PbBr₄ (C₆H₅CH₂CH₂NH₃⁺, PEA⁺) single crystals. Upon careful examination of the crystal growth kinetics, it was found that the optimum temperature for the growth of (PEA)₂PbBr₄ single crystal wafer was 23 ± 0.5 °C. The wafers that were harvested showed high mu-tau (μτ) product, superior environmental stability and irradiation resistance. Furthermore, an array of planar-type UV photodetectors were designed and fabricated with extremely low dark current (∼10⁻¹³ A), large ON/OFF current ratio (∼10⁵), very high specific detectivity (∼10¹³ cm Hz^1/2 W⁻¹) and fast response rate (∼0.4 ms). All the above performance data are among the best achieved compared to those of the state-of-the-art materials including ZnO, TiO₂ and GaN in the field. It makes us believe that the availability of these materials may pave the way for ultrafast optical computing and optical communications.

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Ligand engineering Enables Efficient Pure Red Tin-Based Perovskite Light-Emitting Diodes

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Angewandte Chemie 2023年第50期135卷

作者： Wenhao Bai Mingming Liang Dr. Tongtong Xuan Ting Gong Prof. Liang Bian Prof. Huili Li Prof. Rong-Jun Xie Fujian Key Laboratory of Surface and Interface Engineering for High Performance Materials College of Materials Xiamen University Xiamen 361005 P. R. China Shenzhen Research Institute of Xiamen University Shenzhen 518000 P. R. China State Key Laboratory of Environment-friendly Energy Materials Southwest University of Science and Technology Sichuan 621010 P. R. China Engineering Research Center for Nanophotonics and Advanced Instrument Ministry of Education School of Physics and Electronic Science East China Normal University Shanghai 200241 P. R. China State Key Laboratory of Physical Chemistry of Solid Surfaces Xiamen 361005 P. R. China

With increasing ecological and environmental concerns, tin (Sn)-based perovskite light-emitting diodes (PeLEDs) are competitive candidates for future displays because of their environmental friendliness, excellent photoelectric properties, and low-cost solution-processed fabrication. Nonetheless, their electroluminescence (EL) performance still lags behind that of lead (Pb)-based PeLEDs due to the fast crystallization rate of Sn-based perovskite films and undesired oxidation from Sn 2+ to Sn 4+ , leading to poor film morphology and coverage, as well as high density defects. Here, we propose a ligand engineering strategy to construct high-quality phenethylammonium tin iodide (PEA 2 SnI 4 ) perovskite films by using L-glutathione reduced (GSH) as surface ligands toward efficient pure red PEA 2 SnI 4 -based PeLEDs. We show that the hydrogen-bond and coordinate interactions between GSH and PEA 2 SnI 4 effectively reduce the crystallization rate of the perovskites and suppress the oxidation of Sn 2+ and formation of defects. The improved pure red perovskite films not only show excellent uniformity, density, and coverage but also exhibit enhanced optical properties and stability. Finally, state-of-the-art pure red PeLEDs achieve a record external quantum efficiency of 9.32 % in the field of PEA 2 SnI 4 -based devices. This work demonstrates that ligand engineering represents a feasible route to enhance the EL performance of Sn-based PeLEDs.

关键词： Electroluminescence Lead-Free Light-Emitting Diode Perovskite Pure-Red

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One-Step Approach for Constructing High-Density Single-Atom Catalysts toward Overall Water Splitting at Industrial Current Densities

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Angewandte Chemie 2022年第9期135卷

作者： Dr. Dong Cao Dr. Zhirong Zhang Yahui Cui Runhao Zhang Prof. Lipeng Zhang Prof. Jie Zeng Prof. Daojian Cheng State Key Laboratory of Organic-Inorganic Composites and Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical Technology Beijing 100029 P. R. China School of Chemistry & Chemical Engineering Anhui University of Technology Ma'anshan Anhui 243002 P. R. China Hefei National Laboratory for Physical Sciences at the Microscale Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes Department of Chemical Physics University of Science and Technology of China Hefei Anhui 230026 P. R. China

The construction of highly active, durable, and cost-effective catalysts is urgently needed for green hydrogen production. Herein, catalysts consisting of high-density Pt (24 atoms nm −2 ) and Ir (32 atoms nm −2 ) single atoms anchored on Co(OH) 2 were constructed by a facile one-step approach. Remarkably, Pt 1 /Co(OH) 2 and Ir 1 /Co(OH) 2 only required 4 and 178 mV at 10 mA cm −2 for hydrogen evolution reaction and oxygen evolution reaction, respectively. Moreover, the assembled Pt 1 /Co(OH) 2 //Ir 1 /Co(OH) 2 system showed mass activity of 4.9 A mg noble metal −1 at 2.0 V in an alkaline water electrolyzer, which is 316.1 times higher than that of Pt/C//IrO 2 . Mechanistic studies revealed that reconstructed Ir−O 6 single atoms and remodeled Pt triple-atom sites enhanced the occupancy of Ir−O bonding orbitals and improved the occupation of Pt−H antibonding orbital, respectively, contributing to the formation of the O−O bond and the desorption of hydrogen. This one-step approach was also generalized to fabricate other 20 single-atom catalysts.

关键词： Hydrogen Evolution Reaction Oxygen Evolution Reaction Reaction Mechanisms Single-Atom Catalysts

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Rational surface-Defect Control via Designed Passivation for High-Efficiency Inorganic Perovskite Solar Cells

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Angewandte Chemie 2021年第43期133卷

作者： Xiaojing Gu Prof. Wanchun Xiang Prof. Qingwen Tian Prof. Shengzhong (Frank) Liu Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education Shaanxi Key Laboratory for Advanced Energy Devices Shaanxi Engineering Lab for Advanced Energy Technology School of Materials Science and Engineering Shaanxi Normal University Xi'an 710119 China Dalian National Laboratory for Clean Energy iChEM Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 China

Iodine vacancies (V I ) and undercoordinated Pb 2+ on the surface of all-inorganic perovskite films are mainly responsible for nonradiative charge recombination. An environmentally benign material, histamine (HA), is used to passivate the V I in perovskite films. A theoretical study shows that HA bonds to the V I on the surface of the perovskite film via a Lewis base–acid interaction; an additional hydrogen bond (H-bond) strengthens such interaction owing to the favorable molecular configuration of HA. Undercoordinated Pb 2+ and Pb clusters are passivated, leading to significantly reduced surface trap density and prolonged charge lifetime within the perovskite films. HA passivation also induces an upward shift of the energy band edge of the perovskite layer, facilitating interfacial hole transfer. The combination of the above raises the solar cell efficiency from 19.5 to 20.8 % under 100 mW cm −2 illumination, the highest efficiency so far for inorganic metal halide perovskite solar cells (PSCs).

关键词： CsPbI3−xBrx histamine inorganic perovskite solar cells Lewis base–acid interaction surface passivation

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