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SSRN 2024年

作者： Muthu, Senthilkumar Preethi, Raja V. Johny, Joyal Subalakshmi, K. Sridharan, Moorthy Babu Lee, Kyu-Tae Park, Hui Joon Department of Organic and Nano Engineering Hanyang University Seoul04763 Korea Republic of Human-Tech Convergence Program Hanyang University Seoul04763 Korea Republic of Hanyang Institute of Smart Semiconductor Hanyang University Seoul04763 Korea Republic of Department of Chemistry Indian Institute of Technology- Madras Tamilnadu Chennai600036 India Advanced materials department Jožef Stefan Institute Jamova 39 Ljubljana Slovenia Department of Semiconductor Science Dongguk University-Seoul Seoul04620 Korea Republic of Crystal Growth Centre Anna University Tamilnadu Chennai600025 India Department of Physics Inha University Incheon22212 Korea Republic of

The hybrid-type of supercapacitors based on transition metal sulfides-carbon composite electrodes found to be a prominent and emerging technological advancement with beneficial characteristics larger surface area, high durability and unique charge storage mechanism. In this work, phase pure copper tin sulfide (Cu2SnS3) nanoparticles (NPs) and the nanocomposite of CTS NPs decorated graphitic carbon nitride (g-C3N4) CTS-gCN were prepared by inexpensive solvothermal approach. The CTS-gCN nanocomposite-based supercapacitors show high specific capacitance of 477 F/g at 1 A g-1 current density, which is much higher than the pristine CTS NPs based supercapacitors (362 F/g) in three electrode configurations. The asymmetric hybrid supercapacitors prepared with CTS-gCN and reduced graphene oxide (rGO) as a negative electrode. The electrochemical characteristics of asymmetric CTS-gCN//rGO supercapacitors exhibits battery-like behavior with specific capacitance of 108 F/g at the scan rate of 1 A g-1 with high energy density of 42 W h Kg-1 and power density of 835 W Kg-1. The CTS-gCN//rGO supercapacitors show excellent capacitance retention over 95% even after 1000 cycles. The obtained electrochemical results of the supercapacitors with high energy density, power density, wider potential window and cyclic stability suggests the CTS-gCN//rGO hybrid supercapacitors as a promising candidate for emerging electrochemical energy storage technologies. © 2024, The Authors. All rights reserved.

关键词： Nanoparticles

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Steerable and Agile Light-Fueled Rolling Locomotors by Curvature-Engineered Torsional Torque

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ADVANCED SCIENCE 2023年第30期10卷 e2304715页

作者： Choi, Jun-Chan Jeon, Jisoo Lee, Jae-Won Nauman, Asad Lee, Jae Gyeong Cho, Woongbi Lee, Chanwoo Cho, Young-Min Wie, Jeong Jae Kim, Hak-Rin Kyungpook Natl Univ Sch Elect & Elect Engn Daegu 41566 South Korea Korea Inst Sci & Technol Soft Hybrid Mat Res Ctr Seoul 02792 South Korea Inha Univ Program Environm & Polymer Engn Incheon 22212 South Korea Hanyang Univ Dept Organ & Nano Engn Seoul 04763 South Korea Hanyang Univ Human Tech Convergence Program Seoul 04763 South Korea Kyungpook Natl Univ Sch Elect Engn Daegu 41566 South Korea Hanyang Univ Dept Chem Engn Seoul 04763 South Korea Hanyang Univ Inst Nano Sci & Technol Seoul 04763 South Korea Hanyang Univ Res Inst Ind Sci Seoul 04763 South Korea SUNY Syracuse Michael M Szwarc Polymer Res Inst Coll Environm Sci & Forestry Syracuse NY 13210 USA SUNY Syracuse Dept Chem Engn Coll Enviromental Sci & Forestry Syracuse NY 13210 USA

On-demand photo-steerable amphibious rolling motions are generated by the structural engineering of monolithic soft locomotors. Photo-morphogenesis of azobenzene-functionalized liquid crystal polymer networks (azo-LCNs) is designed from spiral ribbon to helicoid helices, employing a 270 & DEG;super-twisted nematic molecular geometry with aspect ratio variations of azo-LCN strips. Unlike the intermittent and biased rolling of spiral ribbon azo-LCNs with center-of-mass shifting, the axial torsional torque of helicoid azo-LCNs enables continuous and straight rolling at high rotation rates (& AP;720 rpm). Furthermore, center-tapered helicoid structures with wide edges are introduced for effectively accelerating photo-motilities while maintaining directional controllability. Irrespective of surface conditions, the photo-induced rotational torque of center-tapered helicoid azo-LCNs can be transferred to interacting surfaces, as manifested by steep slope climbing and paddle-like swimming multimodal motilities. Finally, the authors demonstrate continuous curvilinear guidance of soft locomotors, bypassing obstacles and reaching desired destinations through real-time on-demand photo-steering.

关键词： amphibious multimodal actuation helical soft robot liquid crystal polymer network on-demand steering photo-mechanical rolling

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Correction to: Design framework for a seamless smart glove using a digital knitting system

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Fashion and Textiles 2021年第1期8卷 1-1页

作者： Song, Yewon Lee, Seulah Choi, Yuna Han, Sora Won, Hyuna Sung, Tae-Hyun Choi, Youngjin Bae, Jihyun PhD Candidate Department of Electrical Engineering Hanyang University Seoul South Korea Post Doctoral Researcher Department of Electrical and Electronic Engineering Hanyang University Ansan South Korea Graduate Student Department of Electrical and Electronic Engineering Hanyang University Ansan South Korea Graduate Student Human-Tech Convergence Program Department of Clothing & Textiles Hanyang University Seoul South Korea Professor Department of Electrical Engineering Hanyang University Seoul South Korea Professor Department of Electrical and Electronic Engineering Hanyang University Ansan South Korea Associate Professor Human-Tech Convergence Program Department of Clothing & Textiles Hanyang University Seoul South Korea

An amendment to this paper has been published and can be accessed via the original article.

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Curing Kinetics and Structure-Property Relationship of Moisture-Cured One-Component Polyurethane Adhesives

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EUROPEAN POLYMER JOURNAL 2023年 201卷

作者： Moon, Hojun Park, Jeong Eun Cho, Woongbi Jeon, Jaecheol Wie, Jeong Jae Hanyang Univ Dept Organ & Nano Engn 222 Wangsimni Ro Seoul 04763 South Korea Hanyang Univ Human Tech Convergence Program 222 Wangsimni Ro Seoul 04763 South Korea Hanyang Univ Res Inst Ind Sci 222 Wangsimni Ro Seoul 04763 South Korea Hyundai Motor Co Surface Treatment Mat Dev Team 150 Hyundaiyeonguso Ro Hwaseong Si 18280 Gyeonggi Do South Korea Hanyang Univ Dept Chem Engn 222 Wangsimni Ro Seoul 04763 South Korea Hanyang Univ Inst Nano Sci & Technol 222 Wangsimni Ro Seoul 04763 South Korea Suny Syracuse Dept Chem Engn Coll Environm Sci & Forestry Syracuse NY 13210 USA SUNY Syracuse Michael M Szwarc Polymer Res Inst Coll Environm Sci & Forestry Syracuse NY 13210 USA

Moisture-curable polyurethane (PU) adhesives have been exploited in the automotive industry because of their usability, non-toxicity without the use of volatile organic compounds (VOC), outstanding solvent resistance, and adhesiveness. However, there has been a lack of quantitative and comprehensive analyses related to the chemical and thermomechanical properties of moisture-curable PU adhesives depending on the applied curing conditions. Herein, we systematically investigated the effects of curing conditions, including relative humidities (25, 35, 45, 55, 65, and 75%RH) and curing duration (0, 0.25, 0.5, 1, 2, 3, 4, 5, 6, and 7 days), on the structure-property relationships of moisture-cured PU adhesives. As the relative humidity increased, the chemical reaction of the PU adhesives accelerated, and they exhibited a high crosslinking density and storage modulus. However, even prolonged curing time and higher relative humidity did not lead to a continuous enhancement in the mechanical properties of the PU adhesive. After a sufficient curing time, the storage modulus of the PU adhesive reached saturation, and the PU adhesives cured above 65%RH demonstrated a comparable saturated storage modulus. This structure-property relationship of PU adhesives will provide fundamental understanding and insights for quality control and optimization of processing time in the industry.

关键词： Moisture-curable polyurethane adhesive Curing condition Humidity Structure -property relationship

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Facile Manufacturing of Foldable Micro-Supercapacitors Utilizing Pneumatic Printing in Conjunction with Intense Pulsed White Light

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SSRN 2024年

作者： Song, Chiho Hwang, Jeonguk Park, Changyoung Lee, Sujin Hwang, Yeon-Taek Kim, Hak-Sung Bansal, Neetu Salunkhe, Rahul R. Ahn, Heejoon Human-Tech Convergence Program Department of Organic and Nano Engineering Hanyang University 222 Wangsimni-ro Seongdong-gu Seoul04763 Korea Republic of Department of Organic and Nano Engineering Hanyang University 222 Wangsimni-ro Seongdong-gu Seoul04763 Korea Republic of Department of Mechanical Engineering Hanyang University 222 Wangsimni-ro Seongdong-gu Seoul04763 Korea Republic of Department of Physics Indian Institute of Technology Jammu Jammu and Kashmir181221 India Department of Battery Engineering Hanyang University 222 Wangsimni-ro Seongdong-gu Seoul04763 Korea Republic of Institute of Nano Science and Technology Hanyang University 222 Wangsimni-ro Seongdong-gu Seoul04763 Korea Republic of

The rapid development of foldable and rollable displays and electronic devices has aggravated the need for flexible and miniaturized energy-storage devices, such as micro-supercapacitors (MSCs). Existing devices have several shortcomings, such as high cost of materials, high energy consumption, and complicated fabrication methods. This study introduces a straightforward method for fabricating flexible MSCs based on reduced graphene oxide (rGO) and manganese oxide utilizing a printing technique and intense pulsed white light (IPWL) technology. Using this method, asymmetric microelectrodes can be easily printed on a flexible polymeric substrate, and rGO and manganese oxide can be quickly synthesized under atmospheric pressure at room temperature via irradiation with IPWL. An asymmetric hybrid-type structure composed of rGO-based carbon materials and synthesized manganese mono-oxide exhibits an areal capacitance of 5.1 mF cm-2 and an energy density of 3 μWh cm-2 at a power density of 0.1 mW cm-2. The developed flexible MSCs worked well at various radii of curvature, even under the extreme bending condition of 1 mm radius of curvature, demonstrating excellent areal capacitance retention of up to 99.4% even after 10,000 repetitive bending cycles. © 2024, The Authors. All rights reserved.

关键词： Supercapacitor

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Applications of biomass-derived solvents in biomass pretreatment - Strategies, challenges, and prospects

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BIORESOURCE techNOLOGY 2023年 368卷 128280页

作者： Meng, Xianzhi Wang, Yunxuan Conte, Austin J. Zhang, Shuyang Ryu, Jiae Wie, Jeong Jae Pu, Yunqiao Davison, Brian H. Yoo, Chang Geun Ragauskas, Arthur J. Univ Tennessee Dept Chem & Biomol Engn Knoxville TN 37996 USA State Univ New York Coll Environm Sci & Forestry Dept Chem Engn Syracuse NY 13210 USA Hanyang Univ Dept Organ & Nano Engn Seoul 04763 South Korea Hanyang Univ Human Tech Convergence Program Seoul 04763 South Korea Hanyang Univ Dept Chem Engn Seoul 04763 South Korea Hanyang Univ Inst Nano Sci & Technol Seoul 04763 South Korea Michael M Szwarc Polymer Res Inst Syracuse NY 13210 USA Oak Ridge Natl Lab ORNL Biosci Div Oak Ridge TN 37831 USA Oak Ridge Natl Lab ORNL Joint Inst Biol Sci Oak Ridge TN 37831 USA Univ Tennessee Inst Agr Ctr Renewable Carbon Dept Forestry Wildlife & Fisheries Knoxville TN 37996 USA

Biomass pretreatment is considered a key step in the 2nd generation biofuel production from lignocellulosic biomass. Research on conventional biomass pretreatment solvents has mainly been focused on carbohydrate conversion efficiency, while their hazardousness and/or carbon intensity were not comprehensively considered. Recent sustainability issues request further consideration for eco-friendly and sustainable alternatives like biomass-derived solvents. Carbohydrate and lignin-derived solvents have been proposed and investigated as green alternatives in many biomass processes. In this review, the applications of different types of biomass pretreatment solvents, including organic, ionic liquid, and deep eutectic solvents, are thoroughly discussed. The role of water as a co-solvent in these pretreatment processes is also reviewed. Finally, current research challenges and prospects of utilizing biomass-derived pretreatment solvents for pretreatment are discussed. Given bio-ethanol's market potential and increasing public awareness about environmental concerns, it will be a priority adopting sustainable and green biomass pretreatment solvents in biorefinery.

关键词： Pretreatment Biomass-derived solvent Organosolv Ionic liquid Deep eutectic solvent

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Multi-Functional Locomotion of Collectively Assembled Shape-Reconfigurable Electronics

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SSRN 2023年

作者： Cho, Woongbi Kang, Dong Jun Hahm, Min Jeong Jeon, Jisoo Kim, Dong-Gyun Kim, Yong Seok Han, Tae Hee Wie, Jeong Jae Department of Organic and Nano Engineering Hanyang University 222 Wangsimni-ro Seongdong-gu Seoul04763 Korea Republic of Human-Tech Convergence Program Hanyang University 222 Wangsimni-ro Seongdong-gu Seoul04763 Korea Republic of Program in Environmental and Polymer Engineering Inha University 100 Inha-ro Michuhol-gu Incheon22212 Korea Republic of Advanced Materials Division Korea Research Institute of Chemical Technology 141 Gajeong-ro Yuseong-gu Daejeon34114 Korea Republic of Department of Chemical Engineering Hanyang University 222 Wangsimni-ro Seongdong-gu Seoul04763 Korea Republic of Institute of Nano Science and Technology Hanyang University 222 Wangsimni-ro Seongdong-gu Seoul04763 Korea Republic of Department of Chemical Engineering State University of New York College of Environmental Science and Forestry SyracuseNY13210 United States The Michael M. Szwarc Polymer Research Institute State University of New York College of Environmental Science and Forestry SyracuseNY13210 United States

Beyond typical flexible electronics, stimuli-responsive shape-reconfigurable electronics are great candidates for the next-generation miniaturized electronics, carrying out complex missions by morphing their geometry and transferring their bodies to the desired positions. To achieve shape-reconfigurable electronics, it is essential to give shape-programmability as well as high electrical conductivity for polymeric materials. However, this is difficult to achieve due to a trade-off relationship between the shape-reconfigurability and the electrical conductivity of polymer composites that embed conductive fillers. Herein, we introduced highly conductive and physical intelligence-encoded polymeric composites based on MXene/liquid crystal elastomer (LCE) bilayer (MLB), for shape-reconfigurable electronics performing on-demand and reversible 3D morphing and locomotion. The MLB demonstrated remarkable photo-/electro-thermally driven bending and twisting performance under near-infrared (NIR) light with 0.4 W cm-2 and voltage application of 3.5 V without delamination, originating from both high photothermal conversion efficiency and electrical conductivity of ~5,300 S cm-1. The MLB also proved structural durability after 1000 cycles of bending originating from the stable interface induced by hydrogen bonding between MXene and LCE. Macroscopic collective assembly of the MLBs enabled dynamic locomotion inspired by nature. Collectively assembled MLBs demonstrated crawling, rotating, jumping, and sling-shooting by engineering the symmetricity of assembled structure and introducing snap-through instability. © 2023, The Authors. All rights reserved.

关键词： Flexible electronics

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Spatially Selective Ultraprecision Polishing and Cleaning by Collective Behavior of Micro Spinbots

SMALL STRUCTURES

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SMALL STRUCTURES 2024年第11期5卷

作者： Je, Hyeongmin Won, Sukyoung Wie, Jeong Jae Kim, Sanha Korea Adv Inst Sci & Technol Dept Mech Engn 291 Daehak Ro Daejeon 34141 South Korea Hanyang Univ Dept Organ & Nano Engn 222 Wangsimni Ro Seoul 04763 South Korea Hanyang Univ Res Inst Ind Sci 222 Wangsimni Ro Seoul 04763 South Korea Hanyang Univ Human Tech Convergence Program 222 Wangsimni Ro Seoul 04763 South Korea Hanyang Univ Dept Chem Engn 222 Wangsimni Ro Seoul 04763 South Korea Hanyang Univ Inst Nano Sci & Technol 222 Wangsimni Ro Seoul 04763 South Korea SUNY Syracuse Coll Environm Sci & Forestry Dept Chem Engn 1 Forestry Dr Syracuse NY 13210 USA SUNY Syracuse Michael M Szwarc Polymer Res Inst Coll Environm Sci & Forestry 1 Forestry Dr Syracuse NY 13210 USA

Untethered magnetic actuation is an attractive technique for controlling a batch of micrometer-sized soft robots. Recent advancements have enabled each robot to follow its path independently using a single magnetic device. However, applications of magnetic soft microrobots are mostly biased toward the biomedical field. In this study, thermoplastic polyurethane-Fe3O4 nanocomposite soft spinning microrobots, that is, spinbots that actuate on a tabletop magnetic stirrer, were utilized as innovative precision manufacturing tools for spatially selective precision polishing and cleaning. The pivot motion of the revolving spinbots, which involves repetitive sweeping during rotation cycles, is explored. This sweeping action physically removes nanometer-sized surface contaminants from the workpiece, achieving a cleaning efficiency of 99.6%. Multiple spinbots, up to 42 in total, simultaneously operated along their own orbital pathways on three vertically stacked wafers, thereby demonstrating an unprecedented cleaning method. In addition, the spinbots precisely removed materials from the workpiece using a three-body abrasion mechanism. Furthermore, the spinbots contributed to precise material removal, resulting in remarkable surface polishing (R a approximate to 1.8 nm). This novel polishing system, which uses the collective behavior of multiple spinbots on a tabletop magnetic stirrer, is 1000-fold lighter than current state-of-the-art equipment aimed at achieving similar levels of fine finishing. Polyurethane-Fe3O4 nanocomposite microrobots, called spinbots, are utilized for precise polishing and cleaning. Multiple microrobots pivot along their trajectories which can sweep to remove nanometer-sized surface contaminants, achieve 99.6% cleaning efficiency, or polish a copper with a fine surface of R a approximate to 1.8 nm. More than 40 spinbots can operate simultaneously on vertically stacked wafers and are spatially restricted when necessary. image (c) 2024 WILEY-VCH GmbH

关键词： cleaning magnetic actuation microrobots polishing untethered miniaturized robots

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A Microphase Separation Strategy for the Infrared Transparency-Thermomechanical Property Conundrum in Sulfur-Rich Copolymers

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ADVANCED OPTICAL MATERIALS 2023年第5期11卷

作者： Hwang, Jae Hyuk Kim, Sang Hwa Cho, Woongbi Lee, Woohwa Park, Sungmin Kim, Yong Seok Lee, Jong-Chan Lee, Kyung Jin Wie, Jeong Jae Kim, Dong-Gyun Korea Res Inst Chem Technol Adv Mat Div 141 Gajeong Ro Daejeon 34114 South Korea Seoul Natl Univ Inst Chem Proc Sch Chem & Biol Engn 599 Gwanak Ro Seoul 08826 South Korea Chungnam Natl Univ Dept Chem Engn & Appl Chem 99 Daehak Ro Daejeon 34134 South Korea Hanyang Univ Dept Organ & Nano Engn 222 Wangsimni Ro Seoul 04763 South Korea Univ Sci & Technol KRICT Sch Adv Mat & Chem Engn 217 Gajeong Ro Daejeon 34114 South Korea Hanyang Univ Human Tech Convergence Program 222 Wangsimni Ro Seoul 04763 South Korea Hanyang Univ Inst Nano Sci & Technol 222 Wangsimni Ro Seoul 04763 South Korea Hanyang Univ Dept Chem Engn 222 Wangsimni Ro Seoul 04763 South Korea SUNY Syracuse Michael M Szwarc Polymer Res Inst Coll Environm Sci & Forestry Syracuse NY 13210 USA

With intrinsic optical and dynamic properties of polysulfide chains, inverse vulcanized copolymers have demonstrated immense potential for infrared (IR) optical applications. However, preparing highly IR-transparent sulfur-rich copolymers without sacrificing their thermomechanical properties remains challenging. To overcome the trade-off relationship between IR optical and thermomechanical properties, an in situ microphase separation strategy for the inverse vulcanization of elemental sulfur utilizing self-crosslinkable 1,3,5-trivinylbenzene (TVB) is presented. Even with 80 wt% sulfur content, the microphase-separated TVB-rich domain self-reinforces the copolymer with a noteworthy modulus of approximate to 2.0 GPa and a high glass transition temperature (T-g) of 92.6 degrees C, while still exhibiting outstanding IR optical properties. This work is expected to provide insights into the fundamental structure-property relationships of sulfur-rich copolymers and pave the way for various practical applications.

关键词： infrared imaging microphase separation sulfur-rich copolymers thermomechanical property

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Perovskite Photovoltaic Cells: Synergistic Effect of Excited State Property and Aggregation Characteristic of Organic Semiconductor on Efficient Hole-Transportation in Perovskite Device (Adv. Funct. Mater. 5/2021)

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Advanced Functional Materials 2021年第5期31卷

作者： Bonghyun Jo Hansol Park Eswaran Kamaraj Sewook Lee Bumho Jung Sivaraman Somasundaram Gyeong G. Jeon Kyu-Tae Lee Namdoo Kim Jong H. Kim Bong-Gi Kim Tae Kyu Ahn Sanghyuk Park Hui Joon Park Department of Organic and Nano Engineering Hanyang University Seoul 04763 Korea Department of Energy Science Sungkyunkwan University Suwon 16419 Korea Human-Tech Convergence Program Hanyang University Seoul 04763 Korea Department of Chemistry Kongju National University Kongju 32588 Korea Department of Molecular Science and Technology Ajou University Suwon 16499 Korea Department of Physics Inha University Incheon 22212 Korea Department of Organic and Nano System Engineering Konkuk University Seoul 05029 Korea

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