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Advanced Heteroatom-Doped Porous Carbon Membranes Assisted by Poly(ionic liquid)Design and Engineering

Accounts of materials Research 2020年第1期1卷 16-29页

作者： Yucheng Wang Yue Shao Hong Wang Jiayin Yuan Department of materials and Environmental Chemistry Stockholm University10691 StockholmSweden Key Laboratory of Functional Polymer materials(Ministry of Education) Institute of Polymer ChemistryCollege of ChemistryNankai UniversityTianjin 300071P.R.China

CONSPECTUS:Heteroatom-doped porous carbon membranes(HPCMMs)with a tailor-made pore architecture,chemical composition,atomic structural order,and surface state represent an exciting family of porous carbon materials for diverse potential applications in catalysis,water treatment,biofiltration,energy conversion/storage,and so *** porous carbon membranes possess intrinsic structural integrity,interconnectivity,and chemical purity across the atomic-to-macro world and have been popularly incorporated into devices as separators or chemically inert conductive supports,circumventing otherwise the inevitable complicated processing and structure weakness of their fine powderous *** by the distinguished heteroatom-doping effect that revolutionizes the chemical and physical nature of carbon materials,the HPCMM research surges very recently,and focuses not only on the eminent conductive supports or separators but also on electro(co)catalysts in energy *** of the porous nature,incorporation of heteroatoms,and the membrane state creates a vivid profile pattern and new task-specific *** is also noteworthy that the inherent structural merits of HPCMMs plus a high electron conductivity imbue them as a reliable binder-free model electrode to derive the intrinsic structure−property relationship of porous carbons in electrochemical environments,excluding the complex and adverse factors in association with polymer binders in carbon powder-based *** are of both intense academic interest and practical value because of their well-defined properties endowed by controllable structure and porosity at both atomic and macroscopic scales in a membrane *** sole aim of this article is to bring this group of porous carbon materials to the forefront so their comprehensive properties and functions can be better understood to serve the carbon community to address pressing materials challenges in our *** this Account,we highligh

关键词： porous ionic doping

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Patternable and transferable silver nanowire conductors via plasma-enhanced cryo-transferring process towards highly stretchable and transparent capacitive touch sensor array

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Nano Research 2023年第8期16卷 11303-11311页

作者： Yifan Gu Zhiguang Qiu Simu Zhu Hao Lu Lisha Peng Gaofan Zhang Ziyi Wu Xuchun Gui Zong Qin Bo-ru Yang State Key Laboratory of Optoelectronic materials and Technologies Guangdong Province Key Laboratory of Display Material and TechnologySchool of Electronics and Information TechnologySun Yat-Sen UniversityGuangzhou 510006China

Stretchable transparent electrode(STE)plays a key role in numerous emerging applications as an indispensable component for future stretchable *** embedded STE,as a promising candidate,possesses balanced performances and facile preparation ***,it still suffers from the defects of conductive materials caused by the transferring,which results in the irreversible failure of *** this work,a patternable silver nanowire(AgNW)STE was fabricated by a plasma-enhanced cryo-transferring(PEC-transferring)*** to the plasma-induced sintering,the AgNW network obtained remarkable improvement in robustness,which ensured the intact network after transferring and thus led to superior tensile electrical properties of the ***,serpentine patterns were utilized to optimize the tensile electrical properties of the STE,which achieved a figure of merit of 292.8 and 150%resistance changing under 50%*** a practical application,a 4×3 array of the mutual-capacitive type stretchable touch sensors was demonstrated for future touch sensors in stretchable *** PEC-transferring process opened a new avenue for patternable embedded STEs and exhibited its high potential in wearable electronics and the Internet of Thing devices.

关键词： stretchable transparent electrode silver nanowire plasma treatment transferring process serpentine

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Toward neglligible memories based heterostructures charge loss in on vertically charge injection integrated 2D

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Nano Research 2016年第8期9卷 2319-2326页

作者： Dongri Qiu Dong Uk Lee Kyoung Su Lee Sang Woo Pak Eun Kyu Kim Quantum-Function Research Laboratory and Department of Physics Hanyang University Seou104763 Republic of Korea NAND Development Division NAND Product Engineering Group SK Hynix Icheon 17336 Republic of Korea

Two-dimensional （2D） crystals have a multitude of forms, including semi-metals, semiconductors, and insulators, which are ideal for assembling isolated 2D atomic materials to create van der Waals （vdW） heterostructures. Recently, artificially-stacked materials have been considered promising candidates for nanoelectronic and optoelectronic applications. In this study, we report the vertical integration of layered structures for the fabrication of prototype non-volatile memory devices. A semiconducting-tungsten-disulfide-channel-based memory device is created by sandwiching high-density-of-states multi-layered graphene as a carrier-confining layer between tunnel barriers of hexagonal boron nitride （hBN） and silicon dioxide. The results reveal that a memory window of up to 20 V is opened, leading to a high current ratio （〉103） between programming and erasing states. The proposed design combination produced layered materials that allow devices to attain perfect retention at 13% charge loss after 10 years, offering new possibilities for the integration of transparent, flexible electronic systems.

关键词： two-dimensional (2D)material graphene hexagonal boron nitride(hBN) tungsten disulphide (WS)2 heterostructure

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Formation of uniform reduced graphene oxide films on modified PET substrates using drop-casting method

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Particuology 2014年第6期12卷 66-73页

作者： Chunlin Zhao Li Xing Junhui Xiang Lijie Cui JianbinJiao Huazheng Sai Zhenyou Li Fei Li College of materials Science and Opto-Electronic Technology University of Chinese Academy of Sciences College of Chemistry and Chemical Engineering University of the Chinese Academy of Sciences College of Engineering and Information Technology University of the Chinese Academy of Sciences

In this work,uniform reduced graphene oxide（RGO） films were formed on poly-（ethylene terephthalate）（PET） substrates using a simple drop-casting *** investigated four types of substrates：unmodified PET,polydopamine-coated ***-group-modified PET,and alkyl-group-modified *** water evaporation,the surface of the polydopamine-modified PET substrates can interact with the reduced graphene oxide sheets to form flattened and continuous RGO films,which exhibit a sheet resistance of 21.75 kΩ/sq at 82% *** result indicates that the properties of the surface groups determined whether uniform and flattened RGO films could be formed on the ***,we proposed a simple and effective way to produce transparent and conductive films in which the catechol unit exhibits a great effect on the deposition of uniform RGO films on PET substrates.

关键词： Reduced graphene oxide Modified PET substrates Drop-casting Polydopamine transparent conductive films

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transparent,Ultra-Stretching,Tough,Adhesive Carboxyethyl Chitin/Polyacrylamide Hydrogel Toward High-Performance Soft Electronics

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Nano-Micro Letters 2023年第1期15卷 161-182页

作者： Jipeng Zhang Yang Hu Lina Zhang Jinping Zhou Ang Lu College of Chemistry and Molecular Sciences Wuhan UniversityWuhan 430072People’s Republic of China Hubei Engineering Center of Natural Polymer-Based Medical materials Wuhan UniversityWuhan 430072People’s Republic of China

To date,hydrogels have gained increasing attentions as a flexible conductive material in fabricating soft ***,it remains a big challenge to integrate multiple functions into one gel that can be used widely under various ***,a kind of multifunc-tional hydrogel with a combination of desirable characteristics,including remarkable transparency,high conductivity,ultra-stretchability,tough-ness,good fatigue resistance,and strong adhesive ability is presented,which was facilely fabricated through multiple noncovalent crosslinking *** resultant versatile sensors are able to detect both weak and large deformations,which owns a low detection limit of 0.1%strain,high stretchability up to 1586%,ultrahigh sensitivity with a gauge factor up to 18.54,as well as wide pressure sensing range(0-600 kPa).Meanwhile,the fabrication of conductive hydrogel-based sensors is demonstrated for various soft electronic devices,including a flexible human-machine interactive system,the soft tactile switch,an integrated electronic skin for unprecedented nonplanar visualized pressure sensing,and the stretchable triboelectric nanogenerators with excellent biomechanical energy harvesting *** work opens up a simple route for multifunctional hydrogel and promises the practical application of soft and self-powered wearable electronics in various complex scenes.

关键词： conductive hydrogels Multifunctional sensors Human-machine interaction Electronic skin Stretchable triboelectric nanogenerators

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Tunable and reconfigurable metasurfaces and metadevices

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Opto-Electronic Advances 2018年第5期1卷 7-31页

作者： Arash Nemati Qian Wang Minghui Hong Jinghua Teng Institute of materials Research & Engineering Agency for Science Technology and Research (A＊STAR) 2 Fusionopolis Way Singa-pore 138634 Singapore Department of Electrical and Computer Engineering National University of Singapore Singapore 117576 Singapore

Metasurfaces, two-dimensional equivalents of metamaterials, are engineered surfaces consisting of deep subwavelength features that have full control of the electromagnetic waves. Metasurfaces are not only being applied to the current de-vices throughout the electromagnetic spectrum from microwave to optics but also inspiring many new thrilling applica-tions such as programmable on-demand optics and photonics in future. In order to overcome the limits imposed by pas-sive metasurfaces, extensive researches have been put on utilizing different materials and mechanisms to design active metasurfaces. In this paper, we review the recent progress in tunable and reconfigurable metasurfaces and metadevicesthrough the different active materials deployed together with the different control mechanisms including electrical, ther-mal, optical, mechanical, and magnetic, and provide the perspective for their future development for applications.

关键词： tunable reconfigurable metasurface metamaterial transparent conductive oxides ferroelectrics graphene phase change material semiconductor micro-nanoelectromechanical systems

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Dopant-Tunable Ultrathin transparent conductive Oxides for Efficient Energy Conversion devices

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Nano-Micro Letters 2021年第12期13卷 437-451页

作者： Dae Yun Kang Bo-Hyun Kim Tae Ho Lee Jae Won Shim Sungmin Kim Ha-Jun Sung Kee Joo Chang Tae Geun Kim School of Electrical Engineering Korea UniversitySeoul 02841Republic of Korea Department of Advanced materials Engineering Kongju National UniversityCheonan 31080Republic of Korea Department of Physics Korea Advanced Institute of Science and TechnologyDaejeon 34141Republic of Korea

Ultrathin film-based transparent conductive oxides(TCOs)with a broad work function(WF)tunability are highly demanded for e cient energy conversion ***,reducing the film thickness below 50 nm is limited due to rapidly increasing resistance;furthermore,introducing dopants into TCOs such as indium tin oxide(ITO)to reduce the resistance decreases the transparency due to a trade-o between the two ***,we demonstrate dopant-tunable ultrathin(≤50 nm)TCOs fabricated via electric field-driven metal implantation(m-TCOs;m=Ni,Ag,and Cu)without com-promising their innate electrical and optical *** m-TCOs exhibit a broad WF variation(0.97 eV),high transmittance in the UV to visible range(89–93%at 365 nm),and low sheet resistance(30–60Ωcm-2).Experimental and theoretical analyses show that interstitial metal atoms mainly a ect the change in the WF without substantial losses in optical *** m-ITOs are employed as anode or cathode electrodes for organic light-emitting diodes(LEDs),inorganic UV LEDs,and organic photovoltaics for their universal use,leading to outstanding performances,even without hole injection layer for OLED through the WF-tailored *** results verify the proposed m-TCOs enable e ective carrier transport and light extraction beyond the limits of traditional TCOs.

关键词： transparent conductive oxide Metal implantation High transparency Low sheet resistance Work function

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Scalable and fast fabrication of graphene integrated micro-supercapacitors with remarkable volumetric capacitance and flexibility through continuous centrifugal coating

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Journal of Energy Chemistry 2021年第1期30卷 284-290,I0009页

作者： Xiaoyu Shi Lijun Tian Sen Wang Pengchao Wen Ming Su Han Xiao Pratteek Das Feng Zhou Zhaoping Liu Chenglin Sun Zhong-Shuai Wu Xinhe Bao Department of Chemical Physics University of Science and Technology of ChinaHefei 230026AnhuiChina Great Scientific Research Institute Datong Coal Mine Group Co.LtdDatong 037003ShanxiChina Dalian National Laboratory for Clean Energy Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina University of Chinese Academy of Sciences Beijing 100049China Ningbo Graphene Innovation Center Co. LtdNingbo 315200ZhejiangChina Ningbo Institute of materials Technology and Engineering Chinese Academy of SciencesNingbo 315201ZhejiangChina

Microscale electrochemical energy storage devices,e.g., micro-supercapacitors(MSCs),possessing tailored performance and diversified form factors of lightweight,miniaturization,flexibility and exceptional integration are highly necessary for the smart power sources-unitized *** the great progress,the fabrication of MSCs combining high integration with high volumetric performance remains largely ***,we develop a simple,fast and scalable strategy to fabricate graphene based highly integrated MSCs by a new effective continuous centrifugal coating ***,the resulting highly conductive graphene films can act as not only patterned microelectrodes but also metal-free current collectors and interconnects,endowing modular MSCs with high integrity,remarkable flexibility,tailored voltage and capacitance output,and outstanding performance *** importantly,the strong centrifugal force and shear force generated in continuous centrifugal coating process lead to graphene films with high alignment,compactness and packing density,contributing to excellent volumetric capacitance of ~31.8 F cm^(-3) and volumetric energy density of ~2.8 mWh cm^(-3),exceeding most reported integrated ***,our work paves a novel way for simple and scalable fabrication of integrated MSCs and offers promising opportunities as standalone microscale power sources for new-generation electronics.

关键词： Integrated micro-supercapacitors Continuous centrifugal coating Graphene Flexibility Volumetric capacitance

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Electrostatic assembly functionalization of poly(γ-glutamic acid)for biomedical antibacterial applications

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Journal of materials Science & Technology 2020年第24期59卷 14-25页

作者： Xiaodan Wang Hengchong Shi Haoyu Tang Huan Yu Qiuyan Yan Huawei Yang Xu Zhang Shifang Luan State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China University of Science and Technology of China Hefei 230026China Institute of Functional Nano&Soft materials Soochow UniversitySuzhou 215123China

Poly(γ-glutamic acid)(γ-PGA)has been found widespread applications in biomedical field because of its excellent water solubility,biocompatibility,and ***,a water-insoluble γ-PGA antibacterial compound is facilely fabricated via one-pot electrostatic assembly of γ-PGA with cationic ethyl lauroyl arginate(ELA).The functionalized γ-PGA compound(γ-PGA-ELA)ethanol solution can facilely produce colorless and transparent coatings on various inorganic,metal,and polymeric substrates,especially for the lumen of slender catheters(length up to 2 m,and inner diameter down to 1 mm).The functionalized γ-PGA coating presents remarkable antibacterial efficacy in vitro and in *** addition,the γ-PGA compound is used as antibacterial additives of polyolefin via melting extrusion,and the asprepared antibacterial polyolefin demonstrates advantageous antibacterial *** importantly,the functionalized γ-PGA coating exhibit good hemocompatibility,low cytotoxicity,and satisfactory *** as-proposed γ-PGA compound has a great potential to serve as a safe and multifunctional antibacterial candidate to combat biomedical devices-related infections.

关键词： Functionalized poly(γ-glutamic acid)compound Electrostatic assembly Antibacterial coating Antibacterial additive Catheter-associated infections

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Metal Nanowire Networks: Recent Advances and Challenges for New Generation Photovoltaics

Metal Nanowire Networks: Recent Advances and Challenges for ...

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第六届新型太阳能电池材料科学与技术学术研讨会

作者： Donglin Jia Jingxuan Chen Xiaoliang Zhang materials Science and Engineering Beihang University

transparent conducting electrodes which allow photons passing through and simultaneously transfers the charge carriers are critical for the construction of high performing photovoltaic cells. Metal oxide electrodes including indium-doped tin oxide(ITO) or fluorine-doped tin oxide(FTO) may have limited application in new generation flexible solar cells, which employ solution-processed roll-to-roll or ink-printing techniques toward large-area-fabrication approach, due to their brittleness and poor mechanical properties. Metal nanowire network(MNWN) emerges as a highly potential alternative candidate instead of ITO or FTO in order to fabricate high performing photovoltaics by virtue of the high transparency, low sheet resistance, low cost, solution processable and compatibility with flexible substrate for high throughput production. This feature article systematically summarizes the recent advances of the MNWNs, including new concepts and emerging strategies for the synthesis of metal nanowires(MNWs), various approaches for the preparation of MNWNs and comprehensively discusses the novel MNWN electrodes deposited on different substrates. The state-of-the-art new generation solar cell devices, such as semitransparent, flexible and light weight solar cells, with MNWN as the transparent conductive electrode are emphasized. Finally, the opportunities and challenges for the development of MNWN electrodes toward application in the new generations of photovoltaic devices are discussed.

关键词： metal nanowire network transparent electrode new-generation photovoltaic solar cell conductivity

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