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Journal of Shanghai jiaotong university(Science) 2004年第3期9卷 83-87页

作者：张正国李倩侠方晓明本田博司 key Lab. of Enhanced Heat Transfer and Energy Conservation Ministry of Education South China Univ. of Technology Guangzhou 510640 China Inst. of materials Chemistry and Eng. Kyushu Univ. Kasuga 816-8580 Japan

The present research is an experimental study on heat transfer characteristics of a natural circulation cooling system for electronic components. A smooth chip and two micro-pin-finned chips were tested. The chip is mounted on the base of a rectangular horizontal duct located at the bottom of 250 mm high natural circulation ***-72 is used as a coolant. The test conditions are set that the operation pressure of experimental system is 1. 013. 105 Pa, the flow rate of FC-72 is 150 g/min and the subcoolings are 10 K, 25 K and 3. k, respectively. Effect of the subcooling on nucleate boiling and critical heat flux(CHF) were investigated. The results show that subcoolingis found to significantly affect CHF for all chips and micro-pin-finned chips sharply enhanced the boiling heat transfer, CHF of micro-pin-finned chips are 2.5～3.times as large as that of smooth chip at the same subcooling.

关键词： electronic component micro-pin-finned heat transfer enhancement

Mesoporous Ag nanocubes synthesized via selectively oxidative etching at room temperature for surface- enhanced Raman spectroscopy

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Nano research 2015年第7期8卷 2351-2362页

作者： Lin Gan Meijia Yang xi Ke Guofeng Cui Xudong Chen Shiva Gupta William Kellogg Drew Higgins Gang Wu key Laboratory for Polymeric Composite and Functional materials of ministry of {3. of china Sun Yat-sen University Guangzhou 510275 China electronic Packaging Electrochemistry Laboratory School of Chemistry and Chemical Engineering Sun Yat-sen University Guangzhou 510275 China Department of Chemical and Biological Engineering University at Buffalo The State University of New York Buffalo New York 14260 USA Department of Chemical Engineering University of Waterloo Waterloo Ontario N2L 36 I Canada

Silver nanocubes enriched with {100} facets have been extensively used for surface-enhanced Raman scattering. Herein, we report a new water-phase synthesis method for weU-defined Ag nanocubes with tunable sizes via a two-step procedure at room temperature. First, irregularly shaped Ag nanoparticles （INPs） were prepared by reducing silver ammonia solution using ethylal. Second, the agglomerated INPs were selectively etched with HNO3.and C1- to yield {100} facet-rich mesoporous Ag nanocubes. The mechanism of Ag-nanocube formation and growth was investigated in detail by elucidating the involved chemical reactions and physical changes at each step during the synthesis. The addition of C1- anions was responsible for facilitating Ag nanoparticle growth by removing surface-adsorbed Ag＋ species, thereby eliminating inter-particle repulsive forces. This agglomeration was found crucial for the subsequent selective oxidation of Ag nanoparticles because the protective agent used, polyvinylpyrrolidone （PVP）, was the most effective one for adsorption on the surfaces of Ag nanoparticles of size greater than approximately 50 nm. Importantly mesopores were found inside the Ag nanocubes; this can be attributed to the unavoidable imperfect packing during the agglomeration of INPs. The newly prepared Ag nanocubes were further used to enhance the Raman signal of rhodamine 6G, which is capable of reducing the detection limitation to 10-16 mol·L-1.

关键词： Ag nanocube,selective etching water phase synthesis room tempersture surface-enhanced raman scattering(sers)

Atomic-level correlation between the electrochemical performance of an oxygen-evolving catalyst and the effects of CeO_(2) functionalization

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Nano research 2022年第4期15卷 2994-3000页

作者： Yanyan Li Wen Luo Duojie Wu Qi Wang Jie Yin Pinxian xi Yongquan Qu Meng Gu xinyu Zhang Zhouguang Lu Zhiping Zheng School of Chemistry and Chemical Engineering Harbin Institute of TechnologyHarbin 150001China Department of Chemistry Guangdong Provincial Key Laboratory of Energy Materials for Electric PowerSouthern University of Science and TechnologyShenzhen 518055China key Laboratory of Energy Conversion and Storage Technologies(Southern university of Science and Technology) Ministry of EducationShenzhen 518055China Department of materials Science and Engineering Shenzhen Key Laboratory of Interfacial Science and Engineering of MaterialsSouthern University of Science and TechnologyShenzhen 518055China Department of materials Science and Engineering Guangdong Provincial Key Laboratory of Energy Materials for Electric PowerSouthern University of Science and TechnologyShenzhen 518055China key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering Research Centre of Biomedical NanotechnologyLanzhou UniversityLanzhou 730000China School of Chemical Engineering and Technology Center for Applied Chemical ResearchFrontier Institute of Science and TechnologyXi'an Jiaotong UniversityXi'an 710049China

Herein,we prepared a bimetallic layered double hydroxide(FeCo LDH)featuring a dandelion-like *** of CeO_(2)onto FeCo LDH produced interfaces between the functionalizing CeO_(2)and the parent *** electrochemical studies were carried *** potential,overpotential,and Tafel slope point to the superior oxygen-evolving performance of CeO_(2)-FeCo LDH with respect to FeCo LDH,therefore,demonstrating the merits of CeO_(2)*** electronic structures of Fe,Co,and Ce were analyzed by X-ray photoelectron spectroscopy(XPS)and electron energy loss spectroscopy(EELS)from which the increase of Co^(3.)and the concurrent lowering of Ce^(4+)were *** the use of CeO_(2)-FeCo LDH,accelerated formation at a sizably reduced potential of Co-OOH,one of the key intermediates preceding the release of O_(2)was observed by in situ Raman *** now have the atomic-level and location-specific evidence,the increase of the active Co^(3.)across the interface to correlate the enhanced catalytic performance with CeO_(2)functionalization.

关键词： CeO_(2)nanoparticles metal layered double hydroxides(LDHs) oxygen evolution reaction intermediate conversion

electronic and magnetic properties of semihydrogenated, fully hydrogenated monolayer and bilayer MoN_2 sheets

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Chinese Physics B 2018年第6期27卷 168-172页

作者： Yan-Chao She Zhao Wei Kai-Wu Luo Yong Li Yun Zhang Wei-xi Zhang Department of Physics and electronic Engineering Tongren University Tongren 554300 China Department of Physics and Information Technology Baoji University of Arts and Sciences Baoji 721016 China

Based on density functional theory, we investigate the electronic and magnetic properties of semi-hydrogenated, fully hydrogenated monolayer and bilayer MoN2. We find that the AB stacking bilayer MoN2 exhibits ferromagnetic coupling of intralayer and antiferromagnetic coupling of interlayer, however, the ground states of the semi-hydrogenated, fully hydrogenated monolayer and AA stcaking bilayer MoN2 are nonmagnetic. The fully hydrogenated system has a quasidirect band-gap of 2.5 eV, which has potential applications in light-emitting diode and photovoltaics. The AB stacking bilayer MoN2 shows the Dirac cone at K point in BZ around Fermi energy. Furthermore, the interlayer of the AB stacking bilayer MoN2 is subjected to a weak van der Waals force, while the interlayer of the AA stacking forms N-N covalent bond.

关键词： semi-hydrogenated MoN2 AA stacking first-principles two-dimensional materials

Ligand Engineering in Tin-Based Perovskite Solar Cells

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Nano-Micro Letters 2023年第10期15卷 112-150页

作者： Peizhou Li xiangrong Cao Jingrui Li Bo Jiao Xun Hou Feng Hao Zhijun Ning Zuqiang Bian Jun xi Liming Ding Zhaoxin Wu Hua Dong key Laboratory for Physical electronics and Devices(MoE) Shaanxi Key Lab of Information Photonic TechniqueSchool of Electronic and Information EngineeringXi’an Jiaotong UniversityXi’an 710049People’s Republic of China Center for Excellence in Nanoscience(CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication(CAS)National Center for Nanoscience and TechnologyBeijing 100190People’s Republic of China School of materials and Energy University of Electronic Science and Technology of ChinaChengdu 611731People’s Republic of China School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210People’s Republic of China Beijing National Laboratory for Molecular Sciences State Key Laboratory of Rare Earth Materials Chemistry and ApplicationsCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871People’s Republic of China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006People’s Republic of China

Perovskite solar cells(PSCs)have attracted aggressive attention in the photovoltaic field in light of the rapid increasing power conversion ***,their large-scale application and commercialization are limited by the toxicity issue of lead(Pb).Among all the lead-free perovskites,tin(Sn)-based perovskites have shown potential due to their low toxicity,ideal bandgap structure,high carrier mobility,and long hot carrier *** progress of Sn-based PSCs has been realized in recent years,and the certified efficiency has now reached over 14%.Nevertheless,this record still falls far behind the theoretical *** is likely due to the uncontrolled nucleation states and pronounced Sn(Ⅳ)*** insights into the methodologies resolving both issues,ligand engineering-assisted perovskite film fabrication dictates the state-of-the-art Sn-based ***,we summarize the role of ligand engineering during each state of film fabrication,ranging from the starting precursors to the ending fabricated *** incorporation of ligands to suppress Sn~(2+)oxidation,passivate bulk defects,optimize crystal orientation,and improve stability is discussed,***,the remained challenges and perspectives toward advancing the performance of Sn-based PSCs are *** expect this review can draw a clear roadmap to facilitate Sn-based PSCs via ligand engineering.

关键词： Perovskite Solar cells Lead-free Ligand engineering Defects Stability

Interface electronic engineering of molybdenum sulfide/MXene hybrids for highly efficient biomimetic sensors

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Nano research 2023年第1期16卷 1158-1164页

作者： Pengfei Wu Tingting You Qingyuan Ren Hongyan xi Qingqing Liu Fengjuan Qin Hongfei Gu Yu Wang Wensheng Yan Yukun Gao Wenxing Chen Penggang Yin key Laboratory of Bio-inspired Smart Interfacial Science and Technology of ministry of education School of ChemistryBeihang UniversityBeijing 100191China Energy&Catalysis Center School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China Shanghai Synchrotron Radiation Facility Zhangjiang LaboratoryShanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201204China National Synchrotron Radiation Laboratory University of Science and Technology of ChinaHefei 230029China

Interface regulation plays a key role in the electrochemical performance for *** controlling the interfacial interaction,the electronic structure of active species can be adjusted effectively at micro and nano-level,which results in the optimal reaction energy ***,we propose an interface electronic engineering scheme to design a strongly coupled 1T phase molybdenum sulfide(1T-MoS2)/MXene hybrids for constructing an efficient electrocatalytic biomimetic *** local electronic and atomic structures of the 1T-MoS2/Ti3.2TX are comprehensively studied by synchrotron radiation-based X-ray photoelectron spectroscopy(XPS),as well as X-ray absorption spectroscopy(XAS)at atomic *** and theoretical calculations show that there are interfacial stresses,atomic defects and adjustable bond-length between MoS2/MXene nanosheets,which can significantly promote biomolecular adsorption and rapid electron transfer to achieve excellent electrochemical activity and reaction *** 1T-MoS2/Ti3.2TX modified electrode shows ultra high sensitivity of 1.198μA/μM for dopamine detection with low limit of 0.05μ*** anticipate that the interface electronic engineering investigation could provide a basic idea for guiding the exploration of advanced biosensors with high sensitivity and low detection limit.

关键词： MXene molybdenum sulfide interface electronic effect biomimetic sensor X-ray absorption spectroscopy

Atomic layer deposition of ultrafine Pd nanoparticles for enhancing the rate capability of LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2) cathode

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Tungsten 2022年第4期4卷 346-355页

作者： Wen-Bin Li Kang Wu Hao Feng Ni Wang Jiang-Hua Zhang Jing-Jing Wang xi-Fei Li Institute of Advanced Electrochemical Energy&School of materials Science and Engineering Xi’an University of TechnologyXi’an710048China Science and Technology on Combustion and Explosion Laboratory Xi’an Modern Chemistry Research InstituteXi’an710065China State Center for International Cooperation on Designer Low-Carbon and Environmental materials(CDLCEM) Zhengzhou UniversityZhengzhou450001China

Atomic layer deposition(ALD)technology has been adopted to obtain the ultrathin coating layer on the surface of LiNi_(x)Co_(y)Mn_(z)O_(2)(NCM)cathode ***,the as-reported coating materials usually form dense film layers and present low electronic conductivity,leading to poor electrochemical ***,the ultrafine Pd nanoparticles(~5 nm)with superior electronic conductivity are successfully deposited on the surface of LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)(NCM811)particles by ALD *** from its high electrical conductivity,intrinsic electrochemical inertia to Li+and HF,unique point coating,and the interfacial Pd-O bond,the coating of ultrafine Pd nanoparticles significantly weakens the electrochemical polarization and enhances the rate capability of NCM811 *** capacity retention ratio at 1 C after 100 cycles reaches 84.6%,and the capacity of 153.5 mA·h·g^(−1) is realized at 5 *** {3. finds that the battery with the coating layer of 5 deposition cycles has a better electrochemical performance than the batteries with 2 and 8 deposition *** work enriches the application of ALD technology in the surface modification of electrode materials and broadens the mind of electrochemical performance enhancement.

关键词： Atomic layer deposition Pd LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2) Nanoparticles Surface coating Lithium-ion battery

Engineering Pt heterogeneous catalysts for accelerated liquid–solid redox conversion in Li-S batteries

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Journal of Energy Chemistry 2022年第6期31卷 490-496,I0014页

作者： Qinhua Gu Yujie Qi Wuxing Hua Tongxin Shang Junnan Chen Luozhen Jiang Lina Li Ming Lu Yixiao Zhang xi Liu Ying Wan Bingsen Zhang Shenyang National Laboratory for materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016LiaoningChina School of materials Science and Engineering University of Science and Technology of ChinaShenyang 110016LiaoningChina key Laboratory of Preparation and Application of Environmental Friendly materials of the ministry of {3. The Joint Laboratory of MXene MaterialsKey Laboratory of Functional Materials Physics and Chemistry of the Ministry of EducationJilin Normal UniversityChangchun 130103JilinChina Nanoyang Group State Key Laboratory of Chemical Engineering School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China key Laboratory of Resource Chemistry of ministry of education Shanghai Key Laboratory of Rare Earth Functional Materialsand Department of ChemistryShanghai Normal UniversityShanghai 200234China School of Chemistry and Chemical Engineering In-situ Center for Physical ScienceShanghai Jiao Tong UniversityShanghai 200240China Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China

The shuttle effect caused by soluble lithium polysulfides (LiPSs) deteriorates multiphase transformation reaction kinetics of sulfur species,and gives rise to an unserviceable lithium-sulfur (Li-S) ***,as a process optimization approach,offers an option to eliminate the intrinsic ***,exploring and understanding the role of catalysts on electrode reaction remains critical bottlenecks,particularly as they are prone to continuous evolution under complex dynamic ***,platinum nanoparticles loaded on MXene nanosheets,as sulfur host,and the action of catalysts on the reaction process are investigated via ex-situ monitors upon solid–liquid–solid chemical transformation of sulfur *** traces confirm that the high performance originates from electron transfer between catalysts and LiPSs,which lowers the nucleation barrier from liquid LiPSs to solid Li_(2)S/Li_(2)S_(2).Further,the accelerated liquid–solid conversion can alleviate the accumulation of LiPSs,and boost the reaction kinetics in Li-S *** findings corroborate the electronic modulation between catalysts and LiPSs,which is a generalizable strategy to optimize energy conversion efficiency of Li-S batteries.

关键词： Lithium-sulfur batteries MXene Catalysis Shuttle effect Pt

Bone infection site targeting nanoparticle-antibiotics delivery vehicle to enhance treatment efficacy of orthopedic implant related infection

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Bioactive materials 2022年第10期7卷 134-148页

作者： Bin’en Nie Shicheng Huo xinhua Qu Jingjing Guo xi Liu Qimin Hong You Wang Jianping Yang Bing Yue Department of Bone and Joint Surgery Department of OrthopedicsRenji HospitalSchool of MedicineShanghai Jiaotong UniversityShanghai200127China State key Laboratory for Modification of Chemical Fibers and Polymer materials College of Materials Science and EngineeringDonghua UniversityShanghai201620China key Laboratory of Carcinogenesis and Translational research(ministry of {3.)Department of Radiology Peking University Cancer Hospital&InstituteBeijing100142China

Orthopedic implants account for 99%of orthopedic surgeries,however,orthopedic implant-related infection is one of the most serious complications owing to the potential for limb-threatening sequelae and *** antibiotic treatments still lack the capacity to target bone infection sites,thereby resulting in unsatisfactory therapeutic ***,the bone infection site targeting efficacy of D6 and UBI29-41 peptides was investigated,and bone-and-bacteria dual-targeted nanoparticles(NPs)with D6 and UBI29-41 peptides were first fabricated to target bone infection site and control the release of vancomycin in bone infection *** results of this study demonstrated that the bone-and-bacteria dual-targeted mesoporous silica NPs exhibit excellent bone and bacteria targeting efficacy,excellent biocompatibility and effective antibacterial properties in ***,in a rat model of orthopedic implant-related infection with methicillin-resistant Staphylococcus aureus,the growth of bacteria was evidently inhibited without cytotoxicity,thus realizing the early treatment of implant-related ***,the bone-and-bacteria dual-targeted molecule-modified NPs may target bacteria-infected bone sites and act as ideal candidates for the therapy of orthopedic implant-related infections.

关键词： Orthopedic implants Antibiotic treatments Bone infection site targeting Mesoporous silica nanoparticles Antibacterial properties

Peroxidase-like single Fe atoms anchored on Ti_(3.C_(2)T_(x)MXene as surface enhanced Raman scattering substrate for the simultaneous discrimination of multiple antioxidants

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Nano research 2023年第7期16卷 10053-10060页

作者： Hongyan xi Hongfei Gu Yurui Han Tingting You Pengfei Wu Qingqing Liu Lirong Zheng Shuhu Liu Qiang Fu Wenxing Chen Yukun Gao Yuting Wang Penggang Yin key Laboratory of Bio-inspired Smart Interfacial Science and Technology of ministry of education School of ChemistryBeihang UniversityBeijing 100191China Energy&Catalysis Center School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China Department of Chemical Physics School of Chemistry and Materials ScienceUniversity of Science and Technology of ChinaHefei 230026China Institute of High Energy Physics Chinese Academy of ScienceBeijing 100029China School of Future Technology University of Science and Technology of ChinaHefei 230026China

Single-atom nanozymes(SAzymes)are emerging as promising alternatives to mimic natural enzyme,which is due to high atomic utilization efficiency,well-defined geometric,and unique electronic ***,Fe single atoms supported on Ti_(3.C_(2)T_(x)(Fe-SA/Ti_(3.C_(2)T_(x))with intrinsic peroxidase activity is developed,further constructing a sensitive Raman sensor array for sensing of five ***-SA/Ti_(3.C_(2)T_(x)shows excellent peroxidase-like performance in catalyzing the oxidation of 3.3.,5,5'-tetramethylbenzidine(TMB)with colorimetric reactions.X-ray adsorption fine structure(XAFS)reveals that the electron transport between the Ti_(3.C_(2)T_(x)and Fe atoms occurs along Fe-O-Ti ligands,meanwhile the density functional theory(DFT)calculations confirm the spontaneous dissociation of H_(2)O_(2)and the formation of OH ***,the peroxidase-like Fe-SA/Ti_(3.C_(2)T_(x)was used as surface enhanced Raman scattering(SERS)substrate of oxidized TMB(TMB+)and achieved satisfied signal amplification *** the blocking effects of free radical reactions,one-off identification of 5 antioxidants,including ascorbic acid(AA),uric acid(UA),glutathione(GSH),melatonin(Mel),and tea polyphenols(TPP),could be realized with this high identifiable catalytic *** principle could realize 100%distinguish accuracy combined with linear discriminant analysis(LDA)and heat map data analysis.A wide detection concentration ranges from 10^(-8)to 10^(-3.M for five antioxidants was also achieved.

关键词： single atom catalyst Ti_(3.C_(2)T_(x)MXene atomic interface site surface enhanced Raman scattering(SERS) antioxidants