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2D MoS2 Helical Liquid Crystalline Fibers for Multifunctional Wearable Sensors

Advanced Fiber Materials 2024年第6期6卷 1813-1824页

作者： Jun Hyun Park Jang Hwan Kim Su Eon Lee Hyokyeong Kim heo Yeon Lim Ji Sung Park Taeyeong Yun jinyong Lee Simon Kim Ho Jun jin Kyeong Jun Park Heemin Kang Hoe Joon Kim Hyeong Min jin Jiwoong Kim Sang Ouk Kim Bong Hoon Kim Department of Robotics and Mechatronics Engineering DGISTDaegu 42988Republic of Korea Present Address:Platform Technology R&D Center LG ChemistrySeoul 07795Republic of Korea Department of Materials Science and Engineering Soongsil UniversitySeoul 06978Republic of Korea Department of Organic Materials and Fiber Engineering Soongsil UniversitySeoul 06978Republic of Korea Nano Convergence Technology Research Center Korea Electronics Technology Institute(KETI)Gyeonggi‑do 13509Republic of Korea Department of Green Chemistry and Materials Engineering Soongsil UniversitySeoul 06978Republic of Korea Department of Materials Science and Engineering Korea UniversitySeoul 02841Republic of Korea Department of Materials Science and Engineering National Creative Research Initiative Center for Multi‑Dimensional Directed Nanoscale AssemblyKAIST Institute for NanocenturyKAISTDaejeon 34141Republic of Korea Department of Organic Materials Engineering Chungnam National UniversityDaejeon 34134Republic of Korea Department of Materials Science and Engineering Chungnam National University99 Daehak‑roYuseong‑guDaejeon 34134Republic of Korea

Fiber-based material systems are emerging as key elements for next-generation wearable devices due to their remarkable advantages,including large mechanical deformability,breathability,and high ***,greatly improved mechani-cal stability has been established in functional fiber systems by introducing atomic-thick two-dimensional(2D)*** development of intelligent fibers that can respond to various external stimuli is strongly needed for versatile *** this work,helical-shaped semiconductive fibers capable of multifunctional sensing are obtained by wet-spinning MoS2 liquid crystal(LC)*** mechanical properties of the MoS2 fibers were improved by exploiting high-purity LC dispersions consisting of uniformly-sized MoS2 ***,three-dimensional(3D)helical fibers with structural chirality were successfully constructed by controlling the wet-spinning process *** helical fibers exhibited multifunctional sensing characteristics,including(1)photodetection,(2)pH monitoring,(3)gas detection,and(4)3D strain sensing.2D materials with semiconducting properties as well as abundant surface reactive sites enable smart multifunctionalities in one-dimensional(1D)and helical fiber geometry,which is potentially useful for diverse applications such as wearable internet of things(IoT)devices and soft robotics.

关键词： Molybdenum disulfide(MoS2) Liquid crystal(LC) Two-dimensional(2D)material Sensor Fiber

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Long acting carmustine loaded natural extracellular matrix hydrogel for inhibition of glioblastoma recurrence after tumor resection

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Frontiers of Chemical Science and Engineering 2022年第4期16卷 536-545页

作者： Sunhui Chen Qiujun Qiu Dongdong Wang Dejun She Bo Yin Meihong Chai Huining He Dong Nyoung heo Jianxin Wang Department of Pharmaceutics School of PharmacyFudan University&Key Laboratory of Smart Drug DeliveryMinistry of EducationShanghai 201203China Department of Radiology Huashan HospitalFudan UniversityShanghai 200040China Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics School of PharmacyTianjin Medical UniversityTianjin 300070China Department of Dental Materials School of DentistryKyung Hee UniversitySeoul 02447Republic of Korea

Many scientific efforts have been made to penetrate the blood-brain barrier and target glioblastoma cells,but the outcomes have been *** attention should be given to local inhibition of recurrence after glioblastoma resection to meet real medical needs.A biodegradable wafer containing the chemotherapeutics carmustine(1,3-bis(2-chloroethyl)-1-nitrosourea,BCNU)was the only local drug delivery system approved for clinical glioblastoma treatment,but with a prolonged survival time of only two months and frequent side *** this study,to improve the sustained release and prolonged therapeutic effect of drugs for inhibiting tumor recurrence after tumor resection,both free BCNU and BCNU-poly(lactic-co-glycolic acid)(the ratio of lactic acid groups to glycolic acid groups is 75/25)nanoparticles were simultaneously loaded into natural extracellular matrix hydrogel from pigskin to prepare BCNU *** hydrogel was injected into the resection cavity of a glioblastoma tumor immediately after tumor removal in a fully characterized resection rat *** drugs were released instantly to kill the residual tumor cells,while drugs in nanoparticles were continuously released to achieve a continuous and effective inhibition of the residual tumor cells for 30 *** combined actions effectively restricted tumor growth in ***,this strategy of local drug implantation and delivery may provide a reliable method to inhibit the recurrence of glioblastoma after tumor resection in vivo.

关键词： BCNU glioblastoma recurrence tumor resection nanoparticles hydrogel

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Understanding the sources and composition of the incremental excess of fine particles across multiple sampling locations in one air shed

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Journal of Environmental Sciences 2014年第4期26卷 818-826页

作者： Jerome E.McGinnis Jongbae heo Michael R.Olson Andrew P.Rutter James J.Schauer University of Wisconsin-Madison Environmental Chemistry and Technology Program Wisconsin State Laboratory of Hygiene

Well-designed health studies and the development of effective regulatory policies need to rely on an understanding of the incremental differences in particulate matter concentrations and their sources. Although only a limited number of studies have been conducted to examine spatial differences in sources to particulate matter within an air shed, routine monitoring data can be used to better understand these differences. Measurements from the US EPA Chemical Speciation Network （CSN） collected between 2002-2008 were analyzed to demonstrate the utility of regulatory data across three sites located within 100 km of each other. Trends in concentrations, source contribution, and incremental excesses across three sites were investigated using the Positive Matrix Factorization model. Similar yearly trends in chemical composition were observed across all sites, however, excesses of organic matter and elemental carbon were observed in the urban center that originated from local emissions of mobile sources and biomass buming. Secondary sulfate and secondary nitrate constituted over half of the PM2.5 with no spatial differences observed across sites. For these components, the excess of emissions from industrial sources could be directly quantified. This study demonstrates that CSN data from multiple sites can be successfully used to derive consistent source profiles and source contributions for regional pollution, and that CSN data can be used to quantify incremental differences in source contributions of across these sites. The analysis strategy can be used in other regions of the world to take advantage of existing ambient particulate matter monitoring data to better the understanding of spatial differences in source contributions within a given air shed.

关键词： CSN Incremental Excess PMFPM2.5

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Potential risk factors for nonalcoholic steatohepatitis related to pancreatic secretions following pancreaticoduodenectomy

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World Journal of Gastroenterology 2011年第32期17卷 3716-3723页

作者： Sun Choon Song Seong Ho Choi Dong Wook Choi jin Seok heo Woo Seok Kim Min Jung Kim Department of Surgery Samsung Medical Center Sungkyunkwan University School of Medicine

AIM: To identify risk factors for nonalcoholic steatohepatitis following pancreaticoduodenectomy, with a focus on factors related to pancreatic secretions. METHODS: The medical records of 228 patients who had a pancreaticoduodenectomy over a 16-mo period were reviewed retrospectively. The 193 patients who did not have fatty liver disease preoperatively were included in the final analysis. Hepatic steatosis was diagnosed using the differences between splenic and hepatic attenuation and liver-to-spleen attenuation as measured by non-enhanced computed tomography. RESULTS: Fifteen patients (7.8%) who showed postoperative hepatic fatty changes were assigned to Group A, and the remaining patients were assigned to Group B. Patient demographics, preoperative laboratory findings (including levels of C-peptide, glucagon, insulin and glucose tolerance test results), operation types, and final pathological findings did not differ significantly between the two groups; however, the frequency of pancreatic fistula (P = 0.020) and the method of pancreatic duct stenting (P = 0.005) showed significant differences between the groups. A multivari- ate analysis identified pancreatic fistula (HR = 3.332, P = 0.037) and external pancreatic duct stenting (HR = 4.530, P = 0.017) as independent risk factors for the development of postoperative steatohepatitis. CONCLUSION: Pancreatic fistula and external pancreatic duct stenting were identified as independent risk factors for the development of steatohepatitis following pancreaticoduodenectomy.

关键词： Nonalcoholic fatty liver diseases Nonalcoholic steatohepatitis Pancreatic duct stenting Pancreatic fistula Pancreatic surgery

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Surface-functionalized hole-selective monolayer for high efficiency single-junction wide-bandgap and monolithic tandem perovskite solar cells

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Journal of Energy Chemistry 2024年第1期88卷 317-326,I0008页

作者： Devthade Vidyasagar Yeonghun Yun Jae Yu Cho Hyemin Lee Kyung Won Kim Yong Tae Kim Sung Woong Yang jina Jung Won Chang Choi Seonu Kim Rajendra Kumar Gunasekaran Seok Beom Kang Kwang heo Dong Hoe Kim Jaeyeong heo Sangwook Lee School of Materials Science and Engineering Kyungpook National UniversityDaegu 41566Republic of Korea Department of Materials Science and Engineering and Optoelectronics Convergence Research CenterChonnam National UniversityGwangju 61186Republic of Korea Department of Materials Science and Engineering Korea UniversitySeoul 02841Republic of Korea Department of Nanotechnology and Advanced Materials Engineering Sejong UniversitySeoul 05006Republic of Korea

Carbazole moiety-based 2PACz([2-(9H-carbazol-9-yl)ethyl]phosphonic acid)self-assembled monolayers(SAMs)are excellent hole-selective contact(HSC)materials with abilities to excel the charge-transferdynamics of perovskite solar cells(PSCs).Herein,we report a facile but powerful method to functionalize the surface of 2PACz-SAM,by which reproducible,highly stable,high-efficiency wide-bandgap PSCs can be *** 2PACz surface treatment with various donor number solvents improves assembly of 2PACz-SAM and leave residual surface-bound solvent molecules on 2PACz-SAM,which increases perovskite grain size,retards halide segregation,and accelerates hole *** surface functionalization achieves a high power conversion efficiency(PCE)of 17.62%for a single-junction wide-bandgap(~1.77 e V)*** also demonstrate a monolithic all-perovskite tandem solar cell using surfaceengineered HSC,showing high PCE of 24.66%with large open-circuit voltage of 2.008 V and high fillfactor of 81.45%.Our results suggest this simple approach can further improve the tandem device,when coupled with a high-performance narrow-bandgap sub-cell.

关键词： Perovskite solar cells 2PACz Monolithic tandem solar cells Wide bandgap

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