检索结果-南通市图书馆

Origin of friction hysteresis on monolayer graphene

在线全文

学校读者我要写书评

暂无评论

Friction 2022年第4期10卷 573-582页

作者： Deliang ZHANG Yuge ZHANG Qiang LI mingdong dong Key Laboratory of Colloid and Interface Chemistry of the Ministry of Education School of Chemistry and Chemical EngineeringShandong UniversityJinan 250100China Interdisciplinary Nanoscience Center(iNANO) Aarhus UniversityAarhus C DK-8000Denmark

Load-dependent friction hysteresis is an intriguing phenomenon that occurs in many materials,where the friction measured during unloading is larger than that measured during loading for a given normal ***,the mechanism underlying this behavior is still not well *** this work,temperaturecontrolled friction force microscopy was utilized to explore the origin of friction hysteresis on exfoliated monolayer *** experimental observations show that environmental adsorbates from ambient air play an important role in the load dependence of ***,the existence of environmental adsorbates between the tip and graphene surface gives rise to an enhanced tip–graphene adhesion force,which leads to a positive friction hysteresis where the friction force is larger during unloading than during *** contrast to positive friction hysteresis,a negative friction hysteresis where the friction force is smaller during unloading than during loading is observed through the removal of the environmental adsorbates upon in situ *** is proposed that the measured friction hysteresis originates from the hysteresis in the contact area caused by environmental adsorbates between the tip and *** findings provide a revised understanding of the friction hysteresis in monolayer graphene in terms of environmental adsorbates.

关键词： friction hysteresis friction force microscopy graphene environmental adsorbates adhesion force

The role of hydrated anions in hydration lubrication

在线全文

学校读者我要写书评

暂无评论

Nano Research 2023年第1期16卷 1096-1100页

作者： Zibo Li Qian Liu Qiang Li mingdong dong Key Laboratory of Colloid and Interface Chemistry of the Ministry of Education School of Chemistry and Chemical EngineeringShandong UniversityJinan 250100China Interdisciplinary Nanoscience Center(iNANO) Aarhus UniversityAarhus C DK-8000Denmark

Hydration lubrication has long been invoked to account for the ultralow sliding friction between charged surfaces in aqueous environments,but still not well understood at ***,we explored the lubrication effect of hydrated halogen anions on positively charged surface at the atomic scale by using three-dimensional atomic force microscopy and friction force *** resolved three-dimensional imaging revealed that the anion layer was topped by a few hydration *** mechanical properties of the hydration layers were found mainly dependent on the concentration of electrolyte solutions and independent of the species of hydrated ***-scale friction experiments showed that the hydration friction coefficient and friction dissipation at low concentrations were orders of magnitude lower than that at high concentrations and in pure *** can be achieved in low concentration electrolyte *** results indicated that the changes of electrolyte solution concentrations led to different adsorption state of anions on the positively charged surface which gave rise to the difference of the friction *** findings in this study reveal the role of hydrated anions in hydration lubrication and provide deep insights into the origins of hydration lubrication.

关键词： hydration lubrication hydration structures anions friction three-dimensional atomic force microscopy(3D-AFM)

Emerging wet electrohydrodynamic approaches for versatile bioactive 3D interfaces

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2020年第2期13卷 315-327页

作者： Mehmet Berat Taskin Lasse Hyldgaard Klausen mingdong dong Menglin Chen Department of Engineering Aarhus University8000 Aarhus CDenmark Interdisciplinary Nanoscience Center Aarhus University 8000 Aarhus CDenmark

There is a compelling need for delicate nanomaterial design with various intricate functions and *** applies electrostatic force to overcome the surface tension of a liquid jet,shrinking the jet through intrinsic jetting instabiity into submicron fibers or spheres,with versatilty from a huge selection of materials,feasibllity of extracellular matrix structure mimicry and multicompartmentalization for tissue engineering and drug *** process typically involves the collection and drying of fibers at a solid substrate,but the introduction of a liquid phase collection by replacing the solid collector with a coagulation bath can introduce a variety of new opportunities for both chemical and physical functionalizations in one single *** so-called wet electrohydrodynamics is an emerging technique that enables a facile,homogeneous functionalization of the intrinsic large surface area of the submicron fibers/*** a thorough literature sweep,we herein highlight the three main engineering features integrated through the single step wet electrospinning process in terms of creating functional biomaterials:(i)The fabrication of 3D macrostructures,(ii)in situ chemical functionalization,and(iii)tunable *** an emerging technique,wet electrohydrodynamics has demonstrated a great potential in interdisciplinary research for the development of functional 3D interfaces and materials with pertinent applications in all fields where secondary structured,functional surface is *** these,engineered biomaterials bridging materials science with biology have already shown particular potential..

关键词： wet-electrohydrodynamics 3D macrostructure in-situ functionalization nanotopographical alteration tissue engineering nanotechnology

Template-free synthesis of inorganic hollow spheres at water/“water-brother”interfaces as Fenton-like reagents for water treatment

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2017年第5期29卷 331-338页

作者： Yingchun Su Shenghua Ma Xiaole Zhao mingdong dong Xiaojun Han MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage State Key Laboratory of Urban Water Resource and EnvironmentSchool of Chemistry and Chemical EngineeringHarbin Institute of Technology Interdisciplinary Nanoscience Center Aarhus University

This paper reports a template-free method to synthesize a series of inorganic hollow spheres（IHSs）including Cu-1,Cu-2,Ni-1,Ni-2 based on mineralization reactions at water/＂water-brother＂ interfaces. ＂Water-brother＂ was defined as a solvent which is miscible with water,such as ethanol and acetone. The water/＂water-brother＂ interfaces are very different from water/oil interfaces. The ＂water-brother＂ solvent will usually form a homogenous phase with water. Interestingly,in our method,these interfaces can be formed,observed and utilized to synthesize hollow spheres. Utilizing the unique porous properties of the spheres,their potential application in water treatment was demonstrated by using Cu-1 IHSs as Fenton-like reagents for adsorption and decomposition of Congo Red from aqueous solution. The final adsorption equilibrium was achieved after 30 min with the maximum adsorption capacity of 86.1 mg/g,and 97.3% removal of the dye in 80 min after adsorption equilibrium. The IHSs can be reused as least 5 times after treatment by Na *** method is facile and suitable for large-scale production,and shows great potential for watertreatment. 更多

关键词： Inorganic hollow spheres Water/"water-brother" interfaces Watertreatment Congo red Fenton-like reaction

Ultrathin Ti_(3)C_(2)T_(x)（MXene） Nanosheet-Wrapped NiSe_(2) Octahedral Crystal for Enhanced Supercapacitor Performance and Synergetic Electrocatalytic Water Splitting

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2019年第2期11卷 179-192页

作者： Hanmei Jiang Zegao Wang Qian Yang Luxi Tan Lichun dong mingdong dong Interdisciplinary Nanoscience Center(iNANO) Aarhus University8000 Aarhus-CDenmark School of Chemistry and Chemical Engineering Key Laboratory of Low-grade Energy Utilization Technologies and Systems of the Ministry of EducationChongqing UniversityChongqing 400044People’s Republic of China College of Materials Science and Engineering Sichuan UniversityChengdu 610065People’s Republic of China College of Chemistry and Molecular Engineering Peking UniversityBeijing 100871People’s Republic of China

Metal selenides,such as NiSe2,have exhibited great potentials as multifunctional materials for energy storage and ***,the utilization of pure NiSe2 as electrode materials is limited by its poor cycling stability,low electrical conductivity,and insufficient electrochemically active *** remedy these defects,herein,a novel NiSe2/Ti3C2Tx hybrid with strong interfacial interaction and electrical properties is fabricated,by wrapping NiSe2 octahedral crystal with ultrathin Ti3C2Tx MXene *** NiSe2/Ti3C2Tx hybrid exhibits excellent electrochemical performance,with a high specific capacitance of 531.2 Fg-1 at1 A g-1 for supercapacitor,low overpotential of 200 mV at 10 mA g-1,and small Tafel slope of 37.7 mV dec-1 for hydrogen evolution reaction(HER).Furthermore,greater cycling stabilities for NiSe2/Ti3C2Tx hybrid in both supercapacitor and HER have also been *** significant improvements compared with unmodified NiSe2 should be owing to thestrong interfacial interaction between NiSe2 octahedral crystal and Ti3C2Tx MXene,which provides enhanced conductivity,fast charge transfer as well as abundant active sites,and highlight the promising potentials in combinations of MXene with metal selenides for multifunctional applications such as energy storage and conversion.

关键词： MXene NiSe_(2) Supercapacitor Water splitting

Constructing two-dimensional interfacial ice-like water at room temperature for nanotribology

在线全文

学校读者我要写书评

暂无评论

Nano Research 2023年第7期16卷 9977-9982页

作者： Yue Hong Deliang Zhang Zhiliang Gao Yuge Zhang Qiang Li mingdong dong Key Laboratory of Colloid and Interface Chemistry of the Ministry of Education School of Chemistry and Chemical EngineeringShandong UniversityJinan 250100China Interdisciplinary Nanoscience Center(iNANO) Aarhus UniversityAarhus C DK-8000Denmark

Water/solid interfaces play crucial roles in a wide range of physicochemical and technological ***,our microscopic understanding of the interfacial water under ambient temperature is relatively ***,we report the direct experimental construction of two-dimensional(2D)ice-like water layer on hydrophilic surface at room temperature by using environment-controlled atomic force *** contrast to the prevailing view that nanoscale confinement is needed for the formation of 2D ice-like water,we find that 2D ice-like water can form on mica surface at temperatures above the freezing point without *** 2D ice-like water layer shows epitaxial relation with the underlying mica lattice and good *** addition,the growth of ice-like water layer can be well controlled by the mechanical force from the scanning ***,the friction properties of 2D ice-like water layer are also probed by friction force *** is found that the icelike water layer can dramatically reduce the *** results provide deep understanding of 2D ice-like water formation on solid surfaces without nanoscale confinement and suggest means of growing 2D ices on surfaces at room temperature.

关键词： two-dimensional ice friction mica surface atomic force microscopy friction force microscopy

Recent Progress in Emerging Two‑Dimensional Transition Metal Carbides

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano-Micro Letters 2021年第11期13卷 375-408页

作者： Tianchen Qin Zegao Wang Yuqing Wang Flemming Besenbacher Michal Otyepka mingdong dong College of Materials Science and Engineering Sichuan UniversityChengdu 610065People’s Republic of China Interdisciplinary Nanoscience Center Aarhus University8000 AarhusDenmark Regional Centre of Advanced Technologies and Materials Department of Physical ChemistryFaculty of SciencePalacky University77146 OlomoucCzech Republic

As a new member in two-dimensional materials family,transition metal carbides(TMCs)have many excellent properties,such as chemical stability,in-plane anisotropy,high conductivity and flexibility,and remarkable energy conversation efficiency,which predispose them for promising applications as transparent electrode,flexible electronics,broadband photodetectors and battery ***,up to now,their device applications are in the early stage,especially because their controllable synthesis is still a great *** review systematically summarized the state-of-the-art research in this rapidly developing field with particular focus on structure,property,synthesis and applicability of ***,the current challenges and future perspectives are outlined for the application of 2D TMCs.

关键词： Two-dimensional transition metal carbides Phase diagram Superconductivity Energy conversation and storage Largescale synthesis

Light-Harvesting Artificial Cells for the Generation of ATP and NADPH

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2023年第1期41卷 57-63页

作者： Ziwei Su Xiangxiang Zhang Weichen Wang mingdong dong Xiaojun Han State Key Laboratory of Urban Water Resource and Environment School of Chemistry and Chemical EngineeringHarbin Institute of Technology92 West Da-Zhi StreetHarbinHeilongjiang 150001China Interdisciplinary Nanoscience Center(iNANO) Aarhus UniversityAarhus DK-8000Denmark

The bottom-up construction of self-powered artificial cells is significant to understand the energy supply and metabolism of nature ***,we demonstrate an efficient manner to build thylakoid-containing artificial cells,which continuously convert light energy into chemical energy to supply adenosine 5'-triphosphate(ATP)under light *** production of ATP supplies energy to promote the biological enzyme cascade reactions,where glucose is transformed into glucose 6-phosphate(G6P)under the catalysis of hexokinase(HK).G6P was further converted to gluconolactone 6-phosphate(PG)in the presence of 6-phosphate dehydrogenase(G6PDH),meanwhile NADP^(+) was converted to nicotinamide adenine dinucleotide phosphate(NADPH).The self-powered artificial cells were demonstrated to generate ATP and NADPH successively,which provided a way for building more complicated artificial cells.

关键词： Artificial cells Thylakoids Metabolism Enzymes Vesicles Light harvesting ATPNADPH GUVs

Emerging polymeric biomaterials and manufacturing techniques in regenerative medicine

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Aggregate

Aggregate 2022年第5期3卷 59-81页

作者： Dan Xia Jiatian Chen Zhongyang Zhang mingdong dong Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology School of Materials Science and EngineeringHebei University of TechnologyTianjinChina Interdisciplinary Nanoscience Center(iNANO) Aarhus UniversityAarhusDenmark

The current demand for patients’organ and tissue repair and regeneration is continually increasing,where autologous or allograft is the golden standard treatment in the ***,due to the shortage of donors,mismatched size and modality,functional loss of the donor region,possible immune rejection,and so forth,the application of auto-/allo-grafts is frequently hindered in many *** order to solve these problems,artificial constructs structurally and functionally imitating the extracellular matrix have been developed as substitutes to promoting cell attachment,proliferation,and differentiation,and ultimately forming functional tissues or organs for better tissue ***,polymeric materials have been widely utilized in regenerative medicine because of their ease of manufacturing,flexibility,biocompatibility,as well as good mechanical,chemical,and thermal *** review presents a comprehensive overview of a variety of polymeric materials,their fabrication methods as well applications in regenerative ***,we discussed the future challenges and perspectives in the development and clinical transformation of polymeric biomaterials.

关键词： polymeric biomaterials utilized