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Hydrophobic aerogel-modified hemostatic gauze with thermal management performance

Bioactive Materials 2023年第8期26卷 142-158页

作者： Xiaoli Jia Chao Hua Fengbo Yang Xiaoxiao Li Peng Zhao Feifan Zhou Yichi Lu Hao Liang Malcolm Xing guozhong lyu Engineering Research Center of the Ministry of Education for Wound Repair Technology Jiangnan UniversityAffiliated Hospital of Jiangnan UniversityWuxi214000China Wuxi School of Medicine Jiangnan UniversityWuxi214000China Medical School of Nantong University Nantong226019China Nanjing University of Traditional Chinese Medicine Nanjing210023China Changhai Clinical Research Unit Shanghai Changhai HospitalNaval Medical UniversityShanghai200433China Department of Mechanical Engineering University of ManitobaWinnipegR3T 2N2Canada

Current hemostatic agents or dressings are not efficient under extremely hot and cold environments due to deterioration of active ingredients,water evaporation and ice crystal growth.To address these challenges,we engineered a biocompatible hemostatic system with thermoregulatory properties for harsh conditions by combining the asymmetric wetting nano-silica aerogel coated-gauze(AWNSA@G)with a layer-by-layer(LBL)structure.Our AWNSA@G was a dressing with a tunable wettability prepared by spraying the hydrophobic nano-silica aerogel onto the gauze from different distances.The hemostatic time and blood loss of the AWNSA@G were 5.1 and 6.9 times lower than normal gauze in rat’s injured femoral artery model.Moreover,the modified gauze was torn off after hemostasis without rebleeding,approximately 23.8 times of peak peeling force lower than normal gauze.For the LBL structure,consisting of the nano-silica aerogel layer and a n-octadecane phase change material layer,in both hot(70℃)and cold(-27℃)environments,exhibited dual-functional thermal management and maintained a stable internal temperature.We further verified our composite presented superior blood coagulation effect in extreme environments due to the LBL structure,the pro-coagulant properties of nano-silica aerogel and unidirectional fluid pumping of AWNSA@G.Our work,therefore,shows great hemostasis potential under normal and extreme temperature environments.

关键词： Hydrophobic hemostasis Thermal management Hydrophobic methyl modified nano-silica aerogel Harsh environments Unidirectional fluid pumping

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长白山苔原植物深色有隔内生真菌物种多样性

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应用生态学报 2024年第6期35卷 1689-1694页

作者：苏丹孙蕊许榕凡张文浩吕国忠沈阳大学生命科学与工程学院沈阳110044 大连民族大学环境与资源学院辽宁大连116600

从长白山自然保护区苔原带典型植物牛皮杜鹃、毛毡杜鹃、笃斯越橘、仙女木的根系分离获得深色有隔内生真菌(DSE)菌株,研究其侵染定殖情况。采用形态特征与rDNA ITS序列分析相结合进行分类鉴定,研究了4种苔原植物的DSE真菌群落组成和物... 详细信息

从长白山自然保护区苔原带典型植物牛皮杜鹃、毛毡杜鹃、笃斯越橘、仙女木的根系分离获得深色有隔内生真菌(DSE)菌株,研究其侵染定殖情况。采用形态特征与rDNA ITS序列分析相结合进行分类鉴定,研究了4种苔原植物的DSE真菌群落组成和物种多样性。结果表明:4种苔原植物的根系内均形成DSE的典型结构“微菌核”。共分离出69株DSE菌株,分属于10个属12个种,分别是福廷瓶头霉、链格孢、细极链格孢、黑附球菌、小孢金丝酵母、白蜡树炭疽菌、茶树炭疽菌、小球腔菌属、枝状枝孢霉、茎点霉属、淡领瓶霉属、Discosia italica,具有丰富的物种多样性,且所有种均为我国高山苔原带首次报道的DSE真菌,其中福廷瓶头霉为各苔原植物的共有种和优势种。4种苔原植物DSE真菌的Simpson、Pielou和Shannon多样性指数均差异显著。表明苔原植物具有丰富的DSE真菌多样性,且二者能够形成良好的共生关系,增强苔原植物对环境的适应性。

关键词：深色有隔内生真菌侵染特征群落组成物种多样性

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基于高通量测序技术的大连童牛岭风景区土壤真菌群落特征研究

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林业调查规划 2024年第2期49卷 124-131页

作者：郝然赵雨晨尚佳航杨红孙晓东李琳琳吕国忠大连民族大学环境与资源学院西安建筑科技大学环境与市政工程学院三峡大学艺术学院

为了解大连市童牛岭风景区土壤真菌多样性及其功能区的变化趋势,采用多点取样法,在景区几个代表性功能区收集土壤样品,利用高通量测序技术对土壤真菌进行检测。结果表明,此次分析土壤真菌包括9个门,33个纲,82个目,170个科,312个属,407... 详细信息

为了解大连市童牛岭风景区土壤真菌多样性及其功能区的变化趋势,采用多点取样法,在景区几个代表性功能区收集土壤样品,利用高通量测序技术对土壤真菌进行检测。结果表明,此次分析土壤真菌包括9个门,33个纲,82个目,170个科,312个属,407个种。景区土壤真菌多样性在多种因素的综合影响下,不同功能区之间均表现出明显的差异,总的趋势是人流量较少区域最高,路旁草地次之。

关键词：真菌多样性群落结构高通量测序 FUNGuild功能预测童牛岭风景区大连

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Superior efficiency and stability of YbO_(x)-enhanced perovskite solar cells

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Science China Materials 2024年第4期67卷 1356-1358页

作者： Qifeng Zhang guozhong Cao Department of Electrical and Computer Engineering North Dakota State UniversityFargoND 58108-6050USA Department of Materials Science and Engineering University of WashingtonSeattleWA 98195-2120USA

Perovskite solar cells represent a revolutionary class of photovoltaic devices that have gained substantial attention for their exceptional performance and potential to provide an affordable and efficient solution for harnessing solar energy. These cells utilize perovskite-structured materials, typically hybrid organicinorganic lead halide compounds, as the light-absorbing layer.

关键词： energy perovskite stability

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Weakly Polarized Organic Cation-Modified Hydrated Vanadium Oxides for High-Energy Efficiency Aqueous Zinc-Ion Batteries

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Nano-Micro Letters 2024年第7期16卷 169-186页

作者： Xiaoxiao Jia Chaofeng Liu Zhi Wang Di Huang guozhong Cao Department of Materials Science and Engineering University of WashingtonSeattleWA 98195USA School of Materials Science and Engineering Tongji UniversityShanghai 201804People’s Republic of China

Vanadium oxides,par-ticularly hydrated forms like V_(2)O_(5)·nH_(2)O(VOH),stand out as promising cathode candidates for aqueous zinc ion batteries due to their adjustable layered structure,unique electronic characteristics,and high theoretical capacities.However,challenges such as vanadium dissolution,sluggish Zn^(2+)diffusion kinetics,and low operating voltage still hinder their direct application.In this study,we present a novel vanadium oxide([C_(6)H_(6)N(CH_(3))_(3)]_(1.08)V_(8)O_(20)·0.06H_(2)O,TMPA-VOH),developed by pre-inserting trimethylphenylammonium(TMPA+)cations into VOH.The incorporation of weakly polarized organic cations capitalizes on both ionic pre-intercalation and molecular pre-intercalation effects,resulting in a phase and morphology transition,an expansion of the interlayer distance,extrusion of weakly bonded interlayer water,and a substantial increase in V^(4+)content.These modifications synergistically reduce the electrostatic interactions between Zn^(2+)and the V-O lattice,enhancing structural stability and reaction kinetics during cycling.As a result,TMPA-VOH achieves an elevated open circuit voltage and operation voltage,exhibits a large specific capacity(451 mAh g^(-1)at 0.1 A g^(-1))coupled with high energy efficiency(89%),the significantly-reduced battery polarization,and outstanding rate capability and cycling stability.The concept introduced in this study holds great promise for the development of high-performance oxide-based energy storage materials.

关键词： Zinc-ion battery Vanadium oxide V_(2)O_(5)·nH_(2)O Pre-intercalation Interlayer engineering

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Efficient single‑pixel imaging based on a compact fiber laser array and untrained neural network

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Frontiers of Optoelectronics 2024年第1期17卷 85-93页

作者： Wenchang Lai guozhong Lei Qi Meng Yan Wang Yanxing Ma Hao Liu Wenda Cui Kai Han College of Advanced Interdisciplinary Studies National University of Defense TechnologyChangsha 410073China Nanhu Laser Laboratory National University of Defense TechnologyChangsha 410073China

This paper presents an efficient scheme for single-pixel imaging(SPI)utilizing a phase-controlled fiber laser array and an untrained deep neural network.The fiber lasers are arranged in a compact hexagonal structure and coherently combined to generate illuminating light fields.Through the utilization of high-speed electro-optic modulators in each individual fiber laser module,the randomly modulated fiber laser array enables rapid speckle projection onto the object of interest.Furthermore,the untrained deep neural network is incorporated into the image reconstructing process to enhance the quality of the reconstructed images.Through simulations and experiments,we validate the feasibility of the proposed method and successfully achieve high-quality SPI utilizing the coherent fiber laser array at a sampling ratio of 1.6%.Given its potential for high emitting power and rapid modulation,the SPI scheme based on the fiber laser array holds promise for broad applications in remote sensing and other applicable fields.

关键词： Single-pixel imaging Fiber laser array Deep learning Remote sensing

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Superior efficiency and stability of YbO-enhanced perovskite solar cells

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Science China Materials 2024年

作者： Qifeng Zhang guozhong Cao Department of Materials Science and Engineering University of Washington Department of Electrical and Computer Engineering North Dakota State University

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Oxygen‑Coordinated Single Mn Sites for Efficient Electrocatalytic Nitrate Reduction to Ammonia

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Nano-Micro Letters 2024年第1期16卷 147-159页

作者： Shengbo Zhang Yuankang Zha Yixing Ye Ke Li Yue Lin Lirong Zheng guozhong Wang Yunxia Zhang Huajie Yin Tongfei Shi Haimin Zhang Laboratory of Materials Physics Centre for Environmental and Energy NanomaterialsAnhui Key Laboratory of Nanomaterials and NanotechnologyCAS Center for Excellence in NanoscienceInstitute of Solid State PhysicsHFIPSChinese Academy of SciencesHefei 230031People’s Republic of China University of Science and Technology of China Hefei 230026People’s Republic of China Key Laboratory of Agricultural Sensors Ministry of AgricultureSchool of Information and ComputerAnhui Agricultural UniversityHefei 230026People’s Republic of China Hefei National Research Center for Physical Sciences at the Microscale University of Science and Technology of ChinaHefei 230026People’s Republic of China Beijing Synchrotron Radiation Facility Institute of High Energy PhysicsChinese Academy of Sciences19B Yuquan RoadBeijing 100049People’s Republic of China

Electrocatalytic nitrate reduction reaction has attracted increasing attention due to its goal of low carbon emission and environmental protection.Here,we report an efficient NitRR catalyst composed of single Mn sites with atomically dispersed oxygen(O)coordination on bacterial cellulose-converted graphitic carbon(Mn-O-C).Evidence of the atomically dispersed Mn-(O-C_(2))_(4)moieties embedding in the exposed basal plane of carbon surface is confirmed by X-ray absorption spectroscopy.As a result,the as-synthesized Mn-O-C catalyst exhibits superior NitRR activity with an NH_(3)yield rate(RNH_(3))of 1476.9±62.6μg h^(−1)cm^(−2)at−0.7 V(vs.reversible hydrogen electrode,RHE)and a faradaic efficiency(FE)of 89.0±3.8%at−0.5 V(vs.RHE)under ambient conditions.Further,when evaluated with a practical flow cell,Mn-O-C shows a high RNH_(3)of 3706.7±552.0μg h^(−1)cm^(−2)at a current density of 100 mA cm−2,2.5 times of that in the H cell.The in situ FT-IR and Raman spectroscopic studies combined with theoretical calculations indicate that the Mn-(O-C_(2))_(4)sites not only effectively inhibit the competitive hydrogen evolution reaction,but also greatly promote the adsorption and activation of nitrate(NO_(3)^(−)),thus boosting both the FE and selectivity of NH_(3)over Mn-(O-C_(2))_(4)sites.

关键词： Atomically dispersed Oxygen coordination Nitrate reduction reaction In situ spectroscopic studies Hydrogen evolution reaction

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重申负压伤口治疗技术规范合理应用的重要性

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中华烧伤杂志 2015年第2期31卷 84-85页

作者：吕国忠无锡市第三人民医院烧伤整形科 214041

近年来，我国烧／创伤外科领域许多医疗单位均先后开展了负压伤口治疗（NPWT）技术，不但在应用范围、使用方法等方面进行了创新，并且对促愈合、促肉芽组织形成等机制进行了探讨和临床研究”[1-3]。本期重点号围绕NPWT问题，介绍不同... 详细信息

近年来，我国烧／创伤外科领域许多医疗单位均先后开展了负压伤口治疗（NPWT）技术，不但在应用范围、使用方法等方面进行了创新，并且对促愈合、促肉芽组织形成等机制进行了探讨和临床研究”[1-3]。本期重点号围绕NPWT问题，介绍不同救治单位的应用经验和对这项技术的认识。

关键词：负压伤口疗法规范创面修复

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Highly sensitive flexible strain sensor based on the two-dimensional semiconductor tellurium with a negative gauge factor

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Science China(Information Sciences) 2024年第7期67卷 295-304页

作者： Jiarui HE Yusong QU Shengyao CHEN Cong WANG Lena DU Xiaoshan DU Yuanyuan ZHENG guozhong ZHAO He TIAN College of Mathematics and Physics Beijing University of Chemical Technology School of Integrated Circuits Tsinghua University Beijing China & The Beijing National Research Center for Information Science and Technology (BNRist)Tsinghua University CAS Center for Excellence in Nanoscience National Center for Nanoscience and Technology &University of Chinese Academy of Sciences Beijing Key Lab of Terahertz Spectroscopy and Imaging Key Lab of Terahertz OptoelectronicsMinistry of Education Department of Physics Capital Normal University

Research on flexible strain sensors has advanced rapidly in recent years, with particular attention being devoted to two-dimensional(2D) semiconductor materials owing to their exceptional mechanical and electrical properties that are conducive to sophisticated sensing performance. However, resistive strain sensors based on 2D semiconductor materials typically exhibit positive gauge factors(GF), while materials for strain sensors with a negative GF remain elusive. We have identified a trend of reduction in the band gap of the emerging 2D semiconductor material tellurium(Te) under strain in simulations reported in past research,and have observed a negative GF in the Te-based strain sensor. In this study, we combined Te with a flexible polyethylene terephthalate(PET) substrate to manufacture a flexible strain sensor with a significantly negative GF. The results of tests revealed that the Te-based strain sensor achieved an impressive maximum sensitivity of-139.7 within a small range of bending-induced strain(< 1%). Furthermore, it exhibited excellent linearity and good cyclic stability, and was successfully applied to monitor limb movements. The work here verifies the significant potential for the use of Te-based strain sensors in next-generation flexible electronics.

关键词： 2D semiconductor materials 2D tellurium flexibleelectronics strain sensors negative gauge factor high sensitivity

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