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一种高效稳定的大电流密度产氢电催化剂

Science Bulletin 2020年第2期65卷 123-130,87-88页

作者：薛森刘志博马超群成会明任文才 School of materials Science and engineering Northeastern UniversityShenyang 110819China Shenyang National Laboratory for materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of materials Science and engineering University of Science and Technology of Chin1Shenyang 110016China Tsinghua-Berkeley Shenzhen Institute(TBSI) Tsinghua UniversityShenzhen 518055China

电解水制氢具有工艺简单、原料来源广泛、无污染、氢气纯度高等优点,是最具发展前景的制氢技术之一.然而电解水制氢存在的最大问题是析氢析氧过程能耗过高,需要添加催化剂降低反应能垒.目前,电催化产氢性能最好的材料依然是价格昂贵且... 详细信息

电解水制氢具有工艺简单、原料来源广泛、无污染、氢气纯度高等优点,是最具发展前景的制氢技术之一.然而电解水制氢存在的最大问题是析氢析氧过程能耗过高,需要添加催化剂降低反应能垒.目前,电催化产氢性能最好的材料依然是价格昂贵且储量有限的贵金属铂基催化剂.发展高效稳定的大电流密度制氢非贵金属催化剂,对于氢气的规模化制备和商业化应用意义重大.本工作采用三维导电泡沫镍为自支撑电极材料,引入钼源和硫源构建高活性催化析氢Mo-Ni-S体系.通过水热反应和退火处理,在泡沫镍基底上制备得到了具有高担载量、细长浓密的Mo S2/Ni3S2同轴异质结构纳米线.催化剂结构设计方面,在水热反应过程中创新性地引入表面活性剂(P123),调控催化剂形貌,增加了活性位点数目.在组分调控方面,通过后期退火处理去除低活性物相,增强了催化性能.基于以上结构和组分设计调控,该催化剂在碱性体系下具有优异的大电流密度催化产氢性能,仅需较低过电势便可获得较高的电流密度,同时具有优异的大电流密度产氢稳定性,其电催化产氢性能超过了已报道的众多催化剂.

关键词： MoS2/Ni3S2 nanowire Co-axial heterostructure Large current density HER Alkaline electrolyte

Preface to Special Issue on Novel Semiconductor-biochemical Sensors

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Journal of Semiconductors 2023年第2期44卷 9-10页

作者： Zhao Li Xiangmei Lin Dongxian He Yingxin Ma Yuanjing Lin State Key Laboratory on Integrated Optoelectronics Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China center of materials Science and Optoelectronics engineering University of Chinese Academy of SciencesBeijing 100049China Beijing Key Laboratory of Genome and Precision Medicine Technologies Beijing 100101China Chinese Academy of Inspection and Quarantine Beijing 100123China College of Water Resources and Civil engineering China Agricultural UniversityBeijing 100083China CAS Key Laboratory of Quantitative engineering Biology Guangdong Provincial Key Laboratory of Synthetic Genomics and Shenzhen Key Laboratory of Synthetic GenomicsShenzhen Institute of Synthetic BiologyShenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China School of Microelectronics Southern University of Science and TechnologyShenzhen 518033China

Since 2020,the global outbreak and continued evolution of the COVID-19 pandemic have brought the concepts of nucleic acid,antigen-antibody,gene sequencing,and other biochemical testing into ordinary *** this regard,novel semiconductor-biochemical sensors that convert biochemical information into monitorable electrical and optical signals according to specific rules have become increasingly important and *** sensors deeply fuse the technical advantages of semiconductors and biochemistry,integrating interdisciplinary subjects such as molecular biology,nanomaterials,microfluidics,artificial intelligence(AI),*** the advantages of fast speed,high sensitivity,high integration,easy mass manufacturing,the novel technologies are the"pioneer"of biomedical information acquisition and the"heart"of modern medical diagnostic ***,the technologies are showing a spurt of development,with new products emerging,new functions being developed,and new application scenarios being *** research hotspots cover a wide range,including immediate detection,non-invasive analysis,wearable devices,on-site monitoring,*** issue looks at the latest advances in the novel technologies for physiological dynamic monitoring of animals/plants and rapid detection of highly pathogenic pathogens,while covering applications in agriculture,fisheries,animal husbandry,biosecurity,and wearable medicine.

关键词： husbandry integrating expanded

Magnetostrictive alloys:Promising materials for biomedical applications

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Bioactive materials 2022年第2期7卷 177-195页

作者： Chengde Gao Zihao Zeng Shuping Peng Cijun Shuai State Key Laboratory of High Performance Complex Manufacturing College of Mechanical and Electrical EngineeringCentral South UniversityChangsha410083China NHC Key Laboratory of Carcinogenesis The Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of EducationSchool of Basic Medical ScienceCentral South UniversityChangsha410078HunanChina School of Energy and Machinery engineering Jiangxi University of Science and TechnologyNanchang330013China Institute of Bioadditive Manufacturing Jiangxi University of Science and TechnologyNanchang330013China Shenzhen Institute of Information technology Shenzhen518172China

Magnetostrictive alloys have attracted increasing attention in biomedical applications because of the ability to generate reversible deformation in the presence of external magnetic *** review focuses on the advances in magnetostrictive alloys and their biomedical *** theories of magnetostriction are systematically *** different types of magnetostrictive alloys and their preparation methods are also reviewed in *** magnetostrictive strains and phase compositions of typical magnetostrictive alloys,including iron based,rare-earth based and ferrite materials,are ***,a variety of approaches to preparing rods,blocks and films of magnetostriction materials,as well as the corresponding methods and setups for magnetostriction measurement,are summarized and ***,the interactions between magnetostrictive alloys and cells are analyzed and emphasis is placed on the transduction and transformation process of mechanochemical signals induced by *** latest applications of magnetostrictive alloys in remote microactuators,magnetic field sensors,wireless implantable devices and biodegradable implants are also ***,future research directions of magnetostrictive alloys are prospected with focus on their potential applications in remote cell actuation and bone repair.

关键词： Magnetostriction alloys Magnetostriction theories Preparation techniques Measurement methods Biomedical applications

Facile and Low-Cost Fabrication of a Thread/Paper-Based Wearable System for Simultaneous Detection of Lactate and pH in Human Sweat

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Advanced Fiber materials 2020年第5期2卷 265-278页

作者： Gang Xiao Jing He Yan Qiao Feng Wang Qingyou Xia Xin Wang Ling Yu Zhisong Lu Chang-Ming Li Institute for Clean Energy and Advanced materials School of Materials and EnergySouthwest University1 Tiansheng RoadChongqing 400715People’s Republic of China State Key Laboratory of Silkworm Genome Biology Southwest University1 Tiansheng RoadChongqing 400715People’s Republic of China Chongqing engineering and technology research center for Novel Silk materials Southwest University1 Tiansheng RoadChongqing 400715People’s Republic of China College of Food Science Southwest UniversityNo.2 Tiansheng RoadBeibei DistrictChongqing 400715People’s Republic of China Institute of Advanced Cross-Field Science Qingdao UniversityQingdao 266071People’s Republic of China

Wearable devices have received tremendous interests in human sweat analysis in the past few ***,the widely used polymeric substrates and the layer-by-layer stacking structures greatly influence the cost-efficiency,conformability and breathability of the devices,further hindering their practical ***,we report a facile and low-cost strategy for the fabrication of a skin-friendly thread/paper-based wearable system consisting of a sweat reservoir and a multi-sensing component for simultaneous in situ analysis of sweat pH and *** the system,hydrophilic silk thread serves as the micro-channel to guide the liquid *** papers were functionalized to prepare colorimetric sensors for lactate and *** smartphone-based quantitative analysis shows that the sensors are sensitive and *** pH may interfere the lactate detection,the pH detected simultaneously could be employed to correct the measured data for the achievement of a precise lactate *** being integrated with a hydrophobic arm guard,the system was successfully used for the on-body measurement of pH and lactate in the sweats secreted from the *** low-cost,easy-to-fabricate,light-weight and flexible thread/paper-based microfluidic sensing device may hold great potentials as a wearable system in human sweat analysis and point-of-care diagnostics.

关键词： Wearable sensors Thread/paper-based microfluidics Sweat analysis Point-of-care diagnostics Multi-sensing system

Retina-inspired organic neuromorphic vision sensor with polarity modulation for decoding light information

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Light(Science & Applications) 2023年第11期12卷 2508-2518页

作者： Ting Jiang Yiru Wang Wanxin Huang Haifeng Ling Guofeng Tian Yunfeng Deng Yanhou Geng Deyang Ji Wenping Hu Tianjin Key Laboratory of Molecular Optoelectronic Science Department of ChemistryInstitute of Molecular Aggregation ScienceTianjin University300072 TianjinChina Haihe Laboratory of Sustainable Chemical Transformations 300192 TianjinChina State Key Laboratory of Organic Electronics and Information Displays&Institute of Advanced materials Nanjing University of Posts&Telecommunications210023 NanjingChina State Key Laboratory of Chemical Resource engineering Beijing University of Chemical Technology100029 BeijingChina School of materials Science and engineering Tianjin University300072 TianjinChina Tianjin Key Laboratory of Molecular Optoelectronic Sciences Department of ChemistrySchool of ScienceTianjin University300072 TianjinChina Collaborative Innovation center of Chemical Science and engineering Tianjin University300072 TianjinChina

The neuromorphic vision sensor(NeuVS),which is based on organic field-effect transistors(OFETs),uses polar functional groups(PFGs)in polymer dielectrics as interfacial units to control charge ***,the mechanism of modulating charge transport on basis of PFGs in devices is ***,the carboxyl group is introduced into polymer dielectrics in this study,and it can induce the charge transfer process at the semiconductor/dielectric interfaces for effective carrier transport,giving rise to the best device mobility up to 20 cm^(2) V^(−1) s^(−1) at a low operating voltage of−1 ***,the polarity modulation effect could further increase the optical figures of merit in NeuVS devices by at least an order of magnitude more than the devices using carboxyl group-free polymer ***,devices containing carboxyl groups improved image sensing for light information decoding with 52 grayscale signals and memory capabilities at an incredibly low power consumption of 1.25 fJ/*** findings provide insight into the production of high-performance polymer dielectrics for NeuVS devices.

关键词： charge polarity light

一维有相互作用系统中拓扑相的分类与演生幺正性

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Science Bulletin 2021年第17期66卷 1731-1739,M0003页

作者：奚文杰张智浩顾正澄陈伟强 Shenzhen Key Laboratory of Advanced Quantum Functional materials and devices Southern University of Science and TechnologyShenzhen 518055China Institute for Quantum Science and engineering and Department of Physics Southern University of Science and TechnologyShenzhen 518055China School of Mathematical Sciences University of Science and Technology of ChinaHefei 230026China Department of Physics The Chinese Uinversity of Hong KongHong KongChina

近年来,非厄米系统中的拓扑相是一个重要的研究热点.本文尝试分类一维有相互作用非厄米系统中的拓扑相.首先,作者将SSH模型推广到了非厄米情形,并详细讨论该模型的拓扑多体贝里相位.在准厄米系统(能谱为实数的非厄米系统)中,多体贝里相... 详细信息

近年来,非厄米系统中的拓扑相是一个重要的研究热点.本文尝试分类一维有相互作用非厄米系统中的拓扑相.首先,作者将SSH模型推广到了非厄米情形,并详细讨论该模型的拓扑多体贝里相位.在准厄米系统(能谱为实数的非厄米系统)中,多体贝里相位是具备良好定义的.之后,该工作展示对于准厄米系统,其拓扑分类与厄米情况是相同的.最后,对于一般性的一维有相互作用非厄米系统,该工作构造了它们的不动点配分函数,并且发现这些不动点配分函数仍然与厄米系统的不动点配分函数有着一一对应.因此,可以得出结论,即对于一般性的一维有相互作用非厄米系统,其拓扑分类与厄米情况是相同的.

关键词：配分函数不动点相互作用系统 SSH模型贝里相位拓扑相拓扑分类一一对应

Hydroiodic Acid Additive Enhanced the Performance and Stability of PbS-QDs Solar Cells via Suppressing Hydroxyl Ligand

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纳微快报：英文版 2020年第3期12卷 117-128页

作者： Xiaokun Yang Ji Yang Jahangeer Khan Hui Deng Shengjie Yuan Jian Zhang Yong Xia Feng Deng Xue Zhou Farooq Umar Zhixin Jin Haisheng Song Chun Cheng Mohamed Sabry Jiang Tang Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyLuoyu Road 1037Wuhan 430074People’s Republic of China Department of materials Science and engineering and Shenzhen Key Laboratory of Nanoimprint technology South University of Science and TechnologyShenzhen 518055People’s Republic of China Shenzhen R&D center of Huazhong University of Science and technology Shenzhen 518000People’s Republic of China School of Optical and Electronic Information Huazhong University of Science and Technology1037 Luoyu RoadWuhan 430074People’s Republic of China National center for Magnetic Resonance in Wuhan State Key Laboratory of Magnetic Resonance and Atomic and Molecular PhysicsWuhan Institute of Physics and MathematicsChinese Academy of SciencesWuhan 430071People’s Republic of China Physics Department College of Applied ScienceUmm Al-Qura UniversityMeccaKingdom of Saudi Arabia Solar Physics Lab National Research Institute of Astronomy and GeophysicsCairoEgypt

The recent emerging progress of quantum dot ink(QD-ink)has overcome the complexity of multiple-step colloidal QD(CQD)film preparation and pronouncedly promoted the device ***,the detrimental hydroxyl(OH)ligands induced from synthesis procedure have not been completely ***,a halide ligand additive strategy was devised to optimize QD-ink *** simultaneously reduced sub-bandgap states and converted them into iodide-passivated surface,which increase carrier mobility of the QDs films and achieve thicker absorber with improved *** corresponding power conversion efficiency of this optimized device reached 10.78%.(The control device was 9.56%.)Therefore,this stratege can support as a candidate strategy to solve the QD original limitation caused by hydroxyl ligands,which is also compatible with other CQD-based optoelectronic devices.

关键词： Hydroxyl ligand HI additive Surface passivation Quantum dots ink Solar cells

Strain-Insensitive Hierarchically Structured Stretchable Microstrip Antennas for Robust Wireless Communication

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Nano-Micro Letters 2021年第8期13卷 1-12页

作者： Jia Zhu Senhao Zhang Ning Yi Chaoyun Song Donghai Qiu Zhihui Hu Bowen Li Chenghao Xing Hongbo Yang Qing Wang Huanyu Cheng Department of engineering Science and Mechanics The Pennsylvania State UniversityUniversity ParkPA 16802USA Division of Life Sciences and Medicine School of Biomedical Engineering(Suzhou)University of Science and Technology of ChinaHefei 230022People’s Republic of China Institute of Biomedical engineering and technology Chinese Academy of ScienceSuzhou 215011People’s Republic of China Department of materials Science and engineering The Pennsylvania State UniversityUniversity ParkPA 16802USA School of engineering and Physical Sciences Heriot-Watt UniversityUniversity ParkEdinburgh EH144ASScotlandUK Department of Electrical engineering The Pennsylvania State UniversityUniversity ParkPA 16802USA

As the key component of wireless data transmission and powering,stretchable antennas play an indispensable role in flexible/stretchable ***,they often suffer from frequency detuning upon mechanical deformations;thus,their applications are limited to wireless sensing with wireless transmission capabilities remaining ***,a hierarchically structured stretchable microstrip antenna with meshed patterns arranged in an arched shape showcases tunable resonance frequency upon deformations with improved overall *** almost unchanged resonance frequency during deformations enables robust on-body wireless communication and RF energy harvesting,whereas the rapid changing resonance frequency with deformations allows for wireless *** proposed stretchable microstrip antenna was demonstrated to communicate wirelessly with a transmitter(input power of−3 dBm)efficiently(i.e.,the receiving power higher than−100 dBm over a distance of 100 m)on human bodies even upon 25%*** flexibility in structural engineering combined with the coupled mechanical-electromagnetic simulations,provides a versatile engineering toolkit to design stretchable microstrip antennas and other potential wireless devices for stretchable electronics.

关键词： Stretchable microstrip antennas Strain-insensitive resonance frequency Wireless communication RF energy harvesting Wearable and bio-integrated electronics

High-temperature continuous-wave operation of 1310 nm InAs/GaAs quantum dot lasers

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中国物理B:英文版 2023年第9期32卷 510-513页

作者：苏向斌邵福会郝慧明刘汗青李叔伦戴德炎尚向军王天放张宇杨成奥徐应强倪海桥丁颖牛智川 State Key Laboratory for Superlattices and Microstructures Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China center of materials Science and Optoelectronics engineering University of Chinese Academy of SciencesBeijing 100049China Beijing Academy of Quantum Information Sciences Beijing 100193China James Watt School of engineering University of GlasgowGlasgowG128LTUK

Here we report 1.3μm electrical injection lasers based on InAs/GaAs quantum dots(QDs)grown on a GaAs substrate,which can steadily work at 110-℃without visible *** QD structure is designed by applying the Stranski-Krastanow growth mode in solid source molecular beam *** density of InAs QDs in the active region is increased from 3.8×10^(10)cm^(-2)to 5.9×10^(10)cm^(-2).As regards laser performance,the maximum output power of devices with lowdensity QDs as the active region is 65 m W at room temperature,and that of devices with the high-density QDs is 103 *** the output power of high-density devices is 131 mW under an injection current of 4 A at 110-℃.

关键词： InAs/GaAs quantum dots high-operating-temperature laser molecular beam epitaxy(MBE)