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Nanostructured Graphene Surfaces Promote Different Stages of Bone Cell Differentiation

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Nano-Micro Letters 2018年第3期10卷 103-114页

作者： F.F.Borghi P.A.Bean M.D.M.Evans T.van der Laan S.Kumar K.Ostrikov Plasma nanoscience School of Physics The University of Sydney CSIRO Manufacturing Brazilian Centre for Physics Research (CBPF) school of Chemistry Physics and Mechanical EngineeringQueensland University of Technology CSIRO-QUT joint Sustainable Processes and Devices Laboratory Commonwealth Scientific and Industrial Research Organization

Nanostructured graphene films were used as platforms for the differentiation of Saos-2 cells into bonelike cells. The films were grown using the plasma-enhanced chemical vapor deposition method, which allowed the production of both vertically and horizontally aligned carbon nanowalls(CNWs). Modifications of the techniqueallowed control of the density of the CNWs and their orientation after the transfer process. The influence of two different topographies on cell attachment, proliferation,and differentiation was investigated. First, the transferred graphene surfaces were shown to be noncytotoxic and were able to support cell adhesion and growth for over 7 ***, early cell differentiation(identified by cellular alkaline phosphatase release) was found to be enhanced on the horizontally aligned CNW surfaces, whereas mineralization(identified by cellular calcium production), a later stage of bone cell differentiation, was stimulated by the presence of the vertical CNWs on the surfaces. These results show that the graphene coatings, grown using the presented method, are biocompatible. And their topographies have an impact on cell behavior, which can be useful in tissue engineering applications.

关键词： Carbon nanowalls Graphene films Bone cell Cell differentiation Plasma nanoscience

Conjugation expansion strategy enables highly stable all-polymer solar cells

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中国化学快报:英文版 2023年第8期34卷 439-443页

作者： Dingding Qiu Yanan Shi Yi Li Jianqi Zhang Kun Lu Zhixiang Wei CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Department of Chemistry Molecular Dynamic Chemistry CenterTianjin Key Laboratory of Molecular Optoelectronic SciencesSchool of ScienceTianjin UniversityTianjin 300354China Sino-Danish Center for Education and Research Sino-Danish CollegeUniversity of Chinese Academy of SciencesBeijing 100049China

The stability issue is one of the key factors hindering the commercial application of organic solar ***-polymer organic solar cell is one of the effective ways to solve the stability *** this work,we designed and synthesized two polymer donor materials PBDT and PDTBDT with different conjugation ranges,and demonstrated for the first time that extending the conjugation range of donor materials in all polymer solar cells can significantly improve device efficiency and *** experimental results of materials and devices show that PDTBDT with a larger conjugation range has stronger crystallinity and a more planar structure,which endows the active layer in its corresponding device with higher exciton dissociation probability,lower carrier recombination probability,more balanced charge transport properties and more favorable film *** a result,the PDTBDT:PYF-T-o devices display an outstanding PCE of 13.38%,which is much higher than PBDT with smaller conjugation range based ***,the PDTBDT:PYF-T-o device retains 0.86 of the initial PCE after over 500 h in the air atmosphere,exhibiting significantly improved *** improved stability is attributed to the enhanced moisture and air tolerance of active layer film thanks to the strong crystallinity of the donor *** results demonstrate that the conjugation expansion strategy is one of the effective ways to obtain efficient and stable all-polymer organic solar cells.

关键词： Polymer donor Conjugation expansion All-polymer organic solar cells Stability Crystallinity

1T-phase MoS_(2)edge-anchored Pt_(1)-S_(3)active site boosting selective hydrogenation of biomass-derived maleic anhydride

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稀有金属:英文版 2023年第8期42卷 2658-2669页

作者： Xue Sun Yi Zhao Kuan Chang Bo Peng Qing-Qing Gu Bing Yang Bai-Yang Yu Jing Xu Fu-Dong Liu Ying Zhang Cheng-Si Pan Yang Lou Key Laboratory of Synthetic and Biological Colloids Ministry of EducationSchool of Chemical and Material EngineeringJiangnan UniversityWuxi 214122China International joint Research Center for Photoresponsive Molecules and Materials Jiangnan UniversityWuxi 214122China SINOPEC Research Institute of Petroleum Processing Beijing 100083China Dalian National Laboratory for Clean Energy Dalian Institute of Chemical PhysicsDalian 116023China school of Food Science and Technology Jiangnan UniversityWuxi 214122China Department of Civil Environmentaland Construction EngineeringCatalysis Cluster for Renewable Energy and Chemical Transformations(REACT)NanoScience Technology Center(NSTC)University of Central FloridaOrlandoFL 32816USA

Selective hydrogenation of biomass-derived maleic anhydride(MAH)to succinic anhydride(SA)is valuable but remains a challenge due to the complicated reaction *** here report that single Pt atoms decorated onto the edges of two-dimensional(2D)1Tphase MoS_(2)(Pt1/1T-MOS_(2)SAC)as a proof-of-concept catalyst can efficiently convert biomass-derived MAH to SA with 100%conversion and 100%selectivity under mild *** kinetic data and characterization results suggest that the catalytic performance of the edge-anchored Pt1/1T-MoS_(2)SAC originates from the facile H_(2)dissociation induced by the electron-deficient Pt1atoms and the pocket-like configuration of Pt1active site confines the adsorption configuration of MAH by the steric *** strategy of fabricating edge-confined catalysts offers a new direction to design novel SACs for biomass-derived transformations.

关键词： Two-dimensional(2D)1T-MoS_(2) Edgeconfinement Pt single atoms Selective hydrogenation reaction Reaction kinetics

The initial attempt to reveal the emission processes of both mechanoluminescence and room temperature phosphorescence with the aid of circular dichroism in solid state

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Science China Chemistry 2021年第3期64卷 445-451页

作者： Yu Tian Xuekang Yang Yanbin Gong Yunsheng Wang Manman Fang Jie Yang Zhiyong Tang Zhen Li Institute of Molecular Aggregation Science Tianjin UniversityTianjin 300072China Department of Chemistry Wuhan UniversityWuhan 430072China joint school of National University of Singapore and Tianjin University International Campus of Tianjin UniversityBinhai New CityFuzhou 350207China CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing 100190China

A phenothiazine derivative PtzChol containing non-conjugated chiral cholesterol group was designed and synthesized. By analyzing the single crystal structure of PtzChol carefully, coupled with the circular dichroism(CD) signals before and after grinding, it was found that the introduction of cholesterol produced a positive effect on the production of chiral space group, on mechanoluminescence(ML) and room temperature phosphorescence(RTP), and throughout the entire light-emitting process, the CD signal could well reflect the changes of molecular arrangement.

关键词： mechanoluminescence room temperature phosphorescence circular dichroism phenothiazine cholesterol

Pd–Ni–P metallic glass nanoparticles for nonenzymatic glucose sensing

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Progress in Natural Science:Materials International 2023年第2期33卷 244-249页

作者： Yu Lou Zhongzheng Yao Shu Fu Sinan Liu Xindong Zhu Wen Huang Min Dong Jianrong Zeng He Lin He Zhu Si Lan Herbert Gleiter Institute of nanoscience School of Materials Science and Engineering Nanjing University of Science and Technology Shanghai Synchrotron Radiation Facility Shanghai Advanced Research Institute Chinese Academy of Sciences Shanghai Institute of Applied Physics Chinese Academy of Sciences Center for Neutron Scattering City University of Hong Kong Shenzhen Research Institute

Metallic glass nanoparticles hold great promise as nonenzymatic glucose sensors due to their rich low-coordinated active sites and high biocompatibility. However,their non-periodic atomic structure and unclear structure-property relationship pose significant challenges for realizing and optimizing their sensing performance. In this work, Pd–Ni–P metallic glass nanoparticles with variable compositions were successfully prepared as nonenzymatic glucose sensors via a laser-evaporated inertgas condensation method. The electrochemical tests show that the sensor based on Pd41.25Ni41.25P17.5nanoparticles shows a wide linear detection range(0.003–1.31m M), high sensitivity(516 μA m M-1cm-2), and high stability(～97.8% current retention after 1000 cycles). Local structural investigations using synchrotron pair distribution function and high-resolution microscopic techniques reveal a strong structural correlation within short-to medium-range orders in the Pd41.25Ni41.25P17.5nanoparticles, which can be well retained after electrochemical cycling. These atomic-scale structural characteristics might be responsible for the high sensing performance. This study demonstrates the high applicability of Pd–Ni–P metallic glass nanoparticles as sensitive and stable non-enzymatic glucose sensors.

关键词： Nanoparticles

Saliva-based point-of-care testing techniques for COVID-19 detection

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Virologica Sinica 2022年第3期37卷 472-476页

作者： Shiwen Wang Ying Liu Yang Qiu Qian Dou Yang Han Muhan Huang Ke Hong Bei Yang Xi Zhou Qing Dai CAS Key Laboratory of Nanophotonic Materials and Devices CAS Key Laboratory of Standardization and Measurement for NanotechnologyCAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing100190China Tianjin Key Laboratory of Molecular Optoelectronic Sciences Department of ChemistrySchool of SciencesTianjin UniversityTianjin300072China State Key Laboratory of Virology Wuhan Institute of VirologyCenter for Biosafety Mega-ScienceChinese Academy of SciencesWuhan430071China joint Laboratory of Infectious Diseases and Health Wuhan Institute of Virology&Wuhan Jinyintan HospitalWuhan Jinyintan HospitalWuhan430048China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing100049China

Saliva has recently attracted increasing interest for disease diagnosis since it presents a rich pool of biological markers such as proteins,DNA,RNA,hormones,***,saliva collection is convenient and safe,making it a perfect candidate for point-of-care testing(POCT)*** saliva-based POCT devices have been developed for large-scale pandemic screening,self-diagnosis,daily health monitoring.

关键词： diagnosis POCT Saliva

1000 Wh L-1 lithium-ion batteries enabled by crosslink-shrunk tough carbon encapsulated silicon microparticle anodes

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National Science Review 2021年第9期8卷 77-87页

作者： Fanqi Chen Junwei Han Debin Kong Yifei Yuan Jing Xiao Shichao Wu Dai-Ming Tang Yaqian Deng Wei Lv Jun Lu Feiyu Kang Quan-Hong Yang Nanoyang Group State Key Laboratory of Chemical Engineering School of Chemical Engineering and Technology Tianjin University Shenzhen Geim Graphene Center Tsinghua Shenzhen International Graduate School Tsinghua University CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in Nanoscience National Center for Nanoscience and Technology Chemical Sciences and Engineering Division Argonne National Laboratory International Center for Materials Nanoarchitectonics(WPI-MANA) National Institute for Materials Science(NIMS) joint school of National University of Singapore and Tianjin University International Campus of Tianjin University

Microparticulate silicon(Si), normally shelled with carbons, features higher tap density and less interfacial side reactions compared to its nanosized counterpart, showing great potential to be applied as high-energy lithium-ion battery anodes. However, localized high stress generated during fabrication and particularly,under operating, could induce cracking of carbon shells and release pulverized nanoparticles, significantly deteriorating its electrochemical performance. Here we design a strong yet ductile carbon cage from an easily processing capillary shrinkage of graphene hydrogel followed by precise tailoring of inner *** a structure, analog to the stable structure of plant cells, presents ‘imperfection-tolerance’ to volume variation of irregular Si microparticles, maintaining the electrode integrity over 1000 cycles with Coulombic efficiency over 99.5%. This design enables the use of a dense and thick(3 m Ah cm–2) microparticulate Si anode with an ultra-high volumetric energy density of 1048 Wh L–1 achieved at pouch full-cell level coupled with a Li Ni0.8Co0.1Mn0.1O2cathode.

关键词： lithium-ion batteries anode silicon microparticles volumetric capacity mechanical stability

CeO_(2) doping boosted low-temperature NH3-SCR activity of FeTiOx catalyst:A microstructure analysis and reaction mechanistic study

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Frontiers of Environmental Science & Engineering 2022年第5期16卷 69-81页

作者： Wei Tan Shaohua Xie Wenpo Shan Zhihua Lian Lijuan Xie Annai Liu Fei Gao Lin Dong Hong He Fudong Liu Department of Civil Environmentaland Construction EngineeringCatalysis Cluster for Renewable Energy and Chemical Transformations(REACT)NanoScience Technology Center(NSTC)University of Central FloridaOrlandoFL32816USA Key Laboratory of Mesoscopic Chemistry of MOE School of Chemistry and Chemical EngineeringJiangsu Key Laboratory of Vehicle Emissions ControlSchool of EnvironmentCenter of Modern AnalysisNanjing UniversityNanjing 210023China State Key joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China Key Laboratory of Urban Pollutant Conversion Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China Institute of Engineering Technology Sinopec Catalyst Co.Ltd.Sinopec GroupBeijing 101111China

FeTiOx has been recognized as an environmental-friendly and cost-effective catalyst for selective catalytic reduction(SCR)of NOx with *** at further improving the low-temperature DeNOx efficiency of FeTiOx catalyst,a simple strategy of CeO_(2) doping was *** low-temperature(<250°C)NH3-SCR activity of FeTiOx catalyst could be dramatically enhanced by CeO2 doping,and the optimal composition of the catalyst was confirmed as FeCe_(0.2)TiOx,which performed a NOx conversion of 90%at ca.200°*** to X-ray diffraction(XRD),Raman spectra and X-ray absorption fine structure spectroscopy(XAFS)analysis,FeCe_(0.2)TiOx showed low crystallinity,with Fe and Ce species well mixed with each *** on the fitting results of extended X-ray absorption fine structure(EXAFS),a unique Ce-O-Fe structure was formed in FeCe_(0.2)TiOx *** well improved specific surface area and the newly formed Ce-O-Fe structure dramatically contributed to the improvement of the redox property of FeCe_(0.2)TiOx catalyst,which was well confirmed by H2-temperature-programmed reduction(H2-TPR)and in situ XAFS *** enhanced redox capability could benefit the activation of NO and NH_(3) at low temperatures for NOx *** detailed reaction mechanism study further suggested that the facile oxidative dehydrogenation of NH_(3) to highly reactive-NH_(2) played a key role in enhancing the low-temperature NH_(3)-SCR performance of FeCe_(0.2)TiOx catalyst.

关键词： NH3-SCR CeO_(2)doping Low-temperature NOx removal Improved redox property In situ XAFS analysis

Pd/silicalite-1: An highly active catalyst for the oxidative removal of toluene

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Journal of Environmental Sciences 2022年第6期34卷 209-219页

作者： Linke Wu Jiguang Deng Yuxi Liu Lin Jing Xiaohui Yu Xing Zhang Ruyi Gao Wenbo Pei Xiuqing Hao Ali Rastegarpanah Hongxing Dai Beijing Key Laboratory for Green Catalysis and Separation Key Laboratory of Beijing on Regional Air Pollution ControlKey Laboratory of Advanced Functional MaterialsEducation Ministry of ChinaLaboratory of Catalysis Chemistry and NanoscienceDepartment of Environmental Chemical EngineeringSchool of Environmental and Chemical EngineeringFaculty of Environment and LifeBeijing University of TechnologyBeijing 100124China

Catalytic combustion is thought as an efficient and economic pathway to remove volatile organic compounds, and its critical issue is the development of high-performance catalytic materials. In this work, we used the in situ synthesis method to prepare the silicalite-1(S-1)-supported Pd nanoparticles(NPs). It is found that the as-prepared catalysts displayed a hexagonal prism morphology and a surface area of 390-440 m^(2)/g. The sample(0.28Pd/S-1-H)derived after reduction at 500°C in 10 vol% H_(2)showed the best catalytic activity for toluene combustion(T50%= 180℃ and T90%= 189℃ at a space velocity of 40,000 m L/(g·hr), turnover frequency(TOFPd) at 160℃ = 3.46 × 10^(-3)sec^(-1), and specific reaction rate at 160℃ = 63.8μmol/(gPd·sec)), with the apparent activation energy(41 k J/mol) obtained over the bestperforming 0.28Pd/S-1-H sample being much lower than those(51-70 k J/mol) obtained over the other samples(0.28Pd/S-1-A derived from calcination at 500℃ in air, 0.26Pd/S-1-im derived from the impregnation route, and 0.27Pd/ZSM-5-H prepared after reduction at 500℃ in 10 vol% H_(2)). Furthermore, the 0.28Pd/S-1-H sample possessed good thermal stability and its partial deactivation due to CO_(2) or H_(2)O introduction was reversible, but SO_(2) addition resulted in an irreversible deactivation. The possible pathways of toluene oxidation over 0.28Pd/S-1-H was toluene → p-methylbenzoquinone → maleic anhydride, benzoic acid, benzaldehyde → carbon dioxide and water. We conclude that the good dispersion of Pd NPs, high adsorption oxygen species concentration, large toluene adsorption capacity, strong acidity,and more Pd~0 species were responsible for the good catalytic performance of 0.28Pd/S-1-H.

关键词： Silicalite-1 Hexagonal prism shape Supported palladium catalyst Volatile organic compound Toluene combustion