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Driving inward growth of lithium metal in hollow microcapsule hosts by heteroatom‐controlled nucleation

Carbon Energy 2024年第8期6卷 262-272页

作者： Siwon Kim Hong Rim Shin Ki Jae Kim min‐sik Park Jong‐Won Lee Division of Materials Science and Engineering Hanyang UniversitySeoulRepublic of Korea Department of Energy Science and Engineering Daegu Gyeongbuk Institute of Science and Technology(DGIST)DaeguRepublic of Korea Department of Energy Science Sungkyunkwan UniversitySuwonRepublic of Korea Department of Advanced Materials Engineering for Information and Electronics Integrated Education for Frontier Science and Technology(BK21 Four)Kyung Hee UniversityYonginRepublic of Korea

The application of Li metal anodes in rechargeable batteries is impeded by safety issues arising from the severe volume changes and formation of dendritic Li ***‐dimensional hollow carbon is receiving increasing attention as a host material capable of accommodating Li metal inside its cavity;however,uncontrollable and nonuniform deposition of Li remains a *** this study,we synthesize metal–organic framework‐derived carbon microcapsules with heteroatom clusters(Zn and Ag)on the capsule walls and it is demonstrated that Ag‐assisted nucleation of Li metal alters the outward‐to‐inward growth in the microcapsule ***‐incorporated microcapsules are prepared via chemical etching of zeolitic imidazole framework‐8 polyhedra and are subsequently decorated with Ag by a galvanic displacement reaction between Ag^(+)and metallic *** introduced Ag significantly reduces the energy barrier and increases the reaction rate for Li nucleation in the microcapsule host upon Li *** combined electrochemical,microstructural,and computational studies,we verify the beneficial role of Ag‐assisted Li nucleation in facilitating inward growth inside the cavity of the microcapsule host and,in turn,enhancing electrochemical *** study provides new insights into the design of reversible host materials for practical Li metal batteries.

关键词： hollow carbon hosts lithium metal batteries lithium plating metal-organic frameworks nucleation

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Surface plasmon enhancement of photoluminescence in photo-chemically synthesized graphene quantum dot and Au nanosphere

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Nano Research 2016年第6期9卷 1866-1875页

作者： Byeongho Park Sun Jun Kim Ji Soo Sohn min sik Nam Shinill Kang Seong Chan Jun School of Mechanical Engineering Yonsei University 50 Yonsei-ro Seodaemun-gu Seou1120-749 Republic of Korea

Graphene quantum dots （GQDs） are promising candidates for potential applications such as novel optoelectronic devices and bio-imaging. However, insufficient light absorption to exhibit their intriguing characteristics. The strong confinement of light caused by the Au nanoparticles as an antenna can considerably boost the light absorption. With the assistance of ultraviolet irradiation, we prepared bluish-green luminescent nanospheres by the hybridiza- tion of GQD and Au nanoparticles （GQD/Au）. These nanospheres showed a photoluminescence quantum yield of up to 26.9%. The GQD/Au nanospheres were synthesized using a solution of GQDs and HAuC14 by a photochemical method with the reduction of GQDs and the formation of metallic Au. The GQDs and Au nanopartides self-assembled and aggregated into nanospheres via aurophilicity and hydrogen bonding interactions. The average size of the GQD/Au nanospheres was found to be in the range of 150-170 nm, which is much larger than that of the pristine GQDs （4-7 nm）. The GQD/Au nanospheres exhibited an absorption band at 541 nm, which indicates the presence of Au in the nanospheres. The typical absorbance features of GQDs were observed near 236 and 303 nrn. The photoluminescence characteristics were investigated using the excitation and emission spectra. The GQD/Au nanospheres exhibited two emission peaks at 468 and 529 nm in the visible range. The green fluorescent peak located at 529 nm was newly generated by the hybridization. The GQD/Au nanospheres showed an emission efficiency which was two times more than that of the intrinsic GQDs. The reason for this increase was the surface plasmon resonance from the Au particles, which improved the fluorescence property of the resulting nanospheres. These nanospheres can be perceived as outstanding candidates for applications such as displays, optoelectronic devices, and imaging of the biological samples with high emission intensity.

关键词： graphene quantum dot gold nanosphere photoluminescence UV irradiation

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Characterization of transgenic mice expressing EGFP under the control of the monkey 20α-hydroxysteroid dehydrogenase promoter

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Science China(Life Sciences) 2018年第8期61卷 966-974页

作者： Chae-Won Park Seong-Keun Jeong Tsevelmaa Nanjidsuren Munkhzaya Byambaragchaa Myung-Hwa Kang Bo-Woong Sim Kwan-sik min Animal Biotechnology Graduate School of Future Convergence Technology Department of Animal Life Science Institute of Genetic Engineering Hankyong National University Department of Food Science and Nutrition Hoseo University National Primate Research Center Korea Research Institute of Bioscience and Biotechnology

To directly assess the molecular function of the monkey 20α-hydroxysteroid dehydrogenase （20α-HSD） promoter, we generated transgenic mice （tg） expressing enhanced green fluorescent protein （EGFP） under control of this promoter. We demonstrated that prostaglandin F2α induced 20α-HSD promoter activity in CHO cells in a dose-dependent manner. Furthermore, forskolin treatment markedly reduced 20α-HSD promoter activity, and prolactin exhibited weak inhibitory activity. The transgenic mouse obtained one positive founder male. The transgene was propagated in 10 successive generations without any notable defects to the progeny. EGFP and 20α-HSD in the tg mice were colocalized in the luteal cells of the ovary during late pregnancy. Strong EGFP and 20et-HSD protein signals were also detected in the adult testis. Immtmohistochemical analysis revealed high EGFP levels in the seminiferous epithelium, whereas 20α-HSD was expressed in the seminiferous tubules. Our data suggest that the ovaries in monkey and mouse exhibit similar expression patterns of 20α-HSD during pregnancy. However, the expression pattern of EGFP in tg mice testis slightly differed from that of the endogenous 20α-HSD. Further investigation is required to elucidate the functional mechanisms underlying regulation of the monkey 20α-HSD promoter in the tg mice.

关键词： transgenic mice EGFP monkey 20α-HSD promoter

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Intrinsic electrochemical activity of Ni in Ni_(3)Sn_(4) anode accommodating high capacity and mechanical stability for fast-charging lithium-ion batteries

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Journal of Energy Chemistry 2022年第8期31卷 470-477,I0013页

作者： Janghyuk Moon Trung Dinh Hoang Seong Soo Park Seowan Park Dong Young Rhee Junwon Lee Sang A Han min-sik Park Jung Ho Kim School of Energy Systems Engineering Chung-Ang UniversityHeukseok-RoDongjak-guSeoul 06974Republic of Korea Department of Advanced Materials Engineering for Information and Electronics Integrated Education Institute for Frontier Science&Technology(BK21 Four)Kyung Hee University1732 Deogyeong-daeroGiheung-guYongin 17104Republic of Korea Institute for Superconducting&Electronic Materials(ISEM) Australian Institute of Innovative Materials(AIIM)University of WollongongInnovation CampusSquires WayNorth WollongongNSW 2500Australia

Fast interfacial kinetics derived from bicontinuous three-dimensional(3D)architecture is a strategic feature for achieving fast-charging lithium-ion batteries(LIBs).One of the main reasons is its large active surface and short diffusion ***,understanding of unusual electrochemical properties still remain great challenge due to its *** this study,we proposed a nickel–tin compound(Ni_(3)Sn_(4))supported by 3D Nickel scaffolds as main frame because the Ni_(3)Sn_(4) clearly offers a higher reversible capacity and stable cycling performance than bare tin(Sn).In order to verify the role of Ni,atomic-scale simulation based on density functional theory systematically addressed to the reaction mechanism and structural evolution of Ni_(3)Sn_(4) during the lithiation *** findings are that Ni enables Ni_(3)Sn_(4) to possess higher mechanical stability in terms of reactive flow stress,subsequently lead to improve Li storage *** study elucidates an understanding of the lithiation mechanism of Ni_(3)Sn_(4) and provides a new perspective for the design of high-capacity and high-power 3D anodes for fast-charging LIBs.

关键词： Lithium-ion batteries Ni_(3)Sn_(4) High-capacity anode 3D-structured electrode Inverse opal structure Density functional theory

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Emerging Technologies of Liquid Crystal Displays

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光学学报 2003年第S1期23卷 797-798页

作者： Sin-Doo Lee Chang-Jae Yu Jae-Hong Park min-sik Jung School of Electrical Engineering #032 Seoul National University Kwanak P.O. Box 34 Seoul 151-742 KoreaSchool of Electrical Engineering #032 Seoul National University Kwanak P.O. Box 34 Seoul 151-742 KoreaSchool of Electrical Engineering #032 Seoul National University Kwanak P.O. Box 34 Seoul 151-742 KoreaSchool of Electrical Engineering #032 Seoul National University Kwanak P.O. Box 34 Seoul 151-742 Korea

The general features and the emerging technologies of liquid crystal displays are described from the viewpoints of wide viewing and fast response technologies. The device applications of liquid crystals for optical co... 详细信息

关键词： of in on it as LCD Emerging Technologies of Liquid Crystal Displays been mode DSG

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Attribute driven inverse materials design using deep learning Bayesian framework

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npj Computational Materials 2019年第1期5卷 22-35页

作者： Piyush M.Tagade Shashishekar P.Adiga Shanthi Pandian min sik Park Krishnan S.Hariharan Subramanya Mayya Kolake Next Gen Research Samsung Advanced Institute of TechnologySamsung R&D InstituteBangalore 560037India Autonomous Material Development Lab Samsung Electronics130 Samsung-roSuwonGyeonggi-do 443-803Republic of Korea

Much of computational materials science has focused on fast and accurate forward predictions of materials properties,for example,given a molecular structure predict its electronic *** is achieved with first principles calculations and more recently through machine learning approaches,since the former is computation-intensive and not practical for high-throughput *** for the right material for any given application,though follows an inverse path—the desired properties are given and the task is to find the right *** we present a deep learning inverse prediction framework,Structure Learning for Attributedriven Materials Design Using Novel Conditional Sampling(SLAMDUNCS),for efficient and accurate prediction of molecules exhibiting target *** apply this framework to the computational design of organic molecules for three applications,organic semiconductors for thin-film transistors,small organic acceptors for solar cells and electrolyte additives with high redox *** method is general enough to be extended to inorganic compounds and represents an important step in deep learning based completely automated materials discovery.

关键词： inverse learning enough

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Long-term outcome of stem cell transplantation with and without anti-tumor necrotic factor therapy in perianal fistula with Crohn’s disease

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World Journal of Stem Cells 2024年第3期16卷 257-266页

作者： min Young Park Yong sik Yoon Jae Ha Park Jong Lyul Lee Chang sik Yu Division of Colon and Rectal Surgery Department of SurgeryYonsei University College of MedicineSeoul 03722South Korea Division of Colon and Rectal Surgery Department of SurgeryUniversity of Ulsan College of MedicineAsan Medical CenterSeoul 05505South Korea

BACKGROUND Stem cell transplantation is a promising therapeutic option for curing perianal fistula in Crohn’s disease(CD).Anti-tumor necrotic factor(TNF)therapy combined with drainage procedure is effective as ***,previous studies are limited to proving whether the combination treatment of biologics and stem cell transplantation improves the effect of fistula *** This study aimed to evaluate the long-term outcomes of stem cell transplantation and compare Crohn’s perianal fistula(CPF)closure rates after stem cell transplantation with and without anti-TNF therapy,and to identify the factors affecting CPF closure and *** The patients with CD who underwent stem cell transplantation for treating perianal fistula in our institution between Jun 2014 and December 2022 were *** data were compared according to anti-TNF therapy and CPF *** A total of 65 patients were *** median age of females was 26 years(range:21-31)and that of males was 29(44.6%).The mean follow-up duration was 65.88±32.65 months,and complete closure was observed in 50(76.9%)*** closure rates were similar after stem cell transplantation with and without anti-TNF therapy(66.7%vs 81.6%at 3 year,P=0.098).The patients with fistula closure had short fistulous tract and infrequent proctitis and anorectal stricture(P=0.027,0.002,and 0.008,respectively).Clinical factors such as complexity,number of fistulas,presence of concurrent abscess,and medication were not significant for *** cumulative 1-,2-,and 3-year closure rates were 66.2%,73.8%,and 75.4%,*** Anti-TNF therapy does not increase CPF closure rates in patients with stem cell ***,both refractory and non-refractory CPF have similar closure rates after additional anti-TNF *** tract length,proctitis,and anal stricture are risk factors for non-closure in patients with CPF after stem cell transplantation.

关键词： Crohn’s disease Anus Fistula Stem cell transplantation Tumor necrosis factor-alpha inhibitors Infliximab

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Anatomical distributional defects in mutant genes associated with dominant intermediate Charcot-Marie-Tooth disease type C in an adenovirus-mediated mouse model

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Neural Regeneration Research 2017年第3期12卷 486-492页

作者： Seo Jin Lee Sandesh Panthi Hyun Woo Jo Jaeyoung Cho min-sik Kim Na Young Jeong In Ok Song Junyang Jung Youngbuhm Huh Department of Biomedical Science Graduate SchoolKyung Hee UniversityDongdaemun-guSeoulKorea Department of Medicine Graduate SchoolKyung Hee UniversityDongdaemun-guSeoulKorea Department of Applied Chemistry College of Applied ScienceKyung Hee UniversityYongin-siGyeonggi-doKorea Department of Anatomy and Cell Biology College of MedicineDong-A UniversitySeo-guBusanKorea Department of Reproductive Endocrinology and Infertility Department of Obstetrics and GynecologyCheil General HospitalDankook University College of MedicineJung-guSeoulKorea Department of Anatomy and Neurobiology College of MedicineKyung Hee UniversityDongdaemun-guSeoulKorea

Dominant intermediate Charcot-Marie-Tooth disease type C（DI-CMTC） is a dominantly inherited neuropathy that has been classified primarily based on motor conduction velocity tests but is now known to involve axonal and demyelination ***-CMTC is linked to tyrosyl-t RNA synthetase（YARS）-associated neuropathies,which are caused by E196 K and G41 R missense mutations and a single de novo deletion（153-156 del VKQV）.It is well-established that these YARS mutations induce neuronal dysfunction,morphological symptoms involving axonal degeneration,and impaired motor *** present study is the first to describe a novel mouse model of YARS-mutation-induced neuropathy involving a neuron-specific promoter with a deleted mitochondrial targeting sequence that inhibits the expression of YARS protein in the *** adenovirus vector system and in vivo techniques were utilized to express YARS fusion proteins with a Flag-tag in the spinal cord,peripheral axons,and dorsal root *** transfection of YARS-expressing viruses,the distributions of wild-type（WT） YARS and E196 K mutant proteins were compared in all expressed regions; G41 R was not *** proportion of Flag/green fluorescent protein（GFP） double-positive signaling in the E196 K mutant-type mice did not significantly differ from that of WT mice in dorsal root ganglion *** adenovirus genes,and even the empty vector without the YARS gene,exhibited GFP-positive signaling in the ventral horn of the spinal cord because GFP in an adenovirus vector is driven by a cytomegalovirus *** present study demonstrated that anatomical differences in tissue can lead to dissimilar expressions of YARS ***,use of this novel animal model will provide data regarding distributional defects between mutant and WT genes in neurons,the DICMTC phenotype,and potential treatment approaches for this disease.

关键词： nerve regeneration tyrosyl-tRNA synthetase YARS-associated neuropathy YARS mutation Charcot-Marie- Tooth Disease adenoviral vector-mediated mouse models neural regeneration

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Short- and long-term outcomes of surgical treatment in patients with intestinal Behcet’s disease

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World Journal of Gastrointestinal Surgery 2024年第2期16卷 429-437页

BACKGROUND Behcet’s disease(BD),a chronic vasculitic disorder affecting multiple organs,is characterized by recurrent oral and genital ulcers,arthritis,vasculitis,and intes-tinal *** intestinal involvement of BD is common in East Asia,the efficacy and long-term outcomes of surgical treatment of intestinal BD still remain to be *** To evaluate the postoperative clinical course of intestinal BD and determine factors associated with its *** Data from patients who underwent surgical treatment for intestinal BD between January 2010 and August 2021 were retrospectively ***’demo-graphics,clinical features,postoperative course,complications,and follow-up data were *** We analyzed 39 surgeries in 31 *** mean patient age was 45.1 years,and the mean interval between the diagnosis of intestinal BD and surgical treatment was 4.9 years(range 1.0-8.0 years).The most common indication for surgery was medical intractability(n=16,41.0%),followed by fistula or abscess(n=11,28.2%).Laparoscopic approaches were used in 19 patients(48.7%),and 5 patients(12.8%)underwent emergency *** most common surgical procedure was ileocecal resection(n=18,46.2%),followed by right colectomy(n=11,28.2%).A diverting stoma was created in only one patient(2.6%).During a mean follow-up period of 45(range 8-72)months,eight cases(20.5%)of recurrence in five patients required *** interval between operations was 12.1 months(range 6.3-17.8 mo).Four patients(10.3%)experienced recurrence within 1 year postoperatively,and all eight recurrences occurred within 2 years of the initial *** reoperation rates at 1 and 3 years were 10.3%and 20.5%,respectively.A redo ileocolic anastomosis was performed in all recurrent *** multivariate Cox regression analysis,emergency surgery[hazard ratio(HR)9.357,95%confidence interval(CI):1.608-54.453,P=0.013]and elevated C-reactive protein(CRP)levels(HR 1.154,95%CI:1.002–1.328,

关键词： Behcet syndrome Intestinal General surgery Recurrence Risk factors

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Controlled Ag-driven superior rate-capability of Li4Ti5O12 anodes for lithium rechargeable batteries

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Nano Research 2013年第5期6卷 365-372页

作者： Jae-Geun Kim Dongqi Shi min-sik Park Goojin Jeong Yoon-Uk Heo minsu Seo Young-Jun Kim Jung Ho Kim Shi Xue Dou Institute for Superconducting and Electronic Materials University of Wollongong North Wollongong NSW2500 Australia Advanced Batteries Research Center Korea Electronics Technology Institute Seongnam 463-816 Republic of Korea Research Facility Center Graduate Institute of Ferrous Technology Pohang University of Science and Technology Pohang 790-784 Republic of Korea

The morphology and electronic structure of a Li4Ti5012 anode are known to determine its electrical and electrochemical properties in lithium rechargeable batteries. Ag-Li4Ti5012 nanofibers have been rationally designed and synthesized by an electrospinning technique to meet the requirements of one-dimensional （1D） morphology and superior electrical conductivity. Herein, we have found that the 1D Ag-Li4Ti5012 nanofibers show enhanced specific capacity, rate capability, and cycling stability compared to bare Li4Ti5012 nanofibers, due to the Ag nanoparticles （〈5 nm）, which are mainly distributed at interfaces between Li4Ti5O12 primary particles. This structural morphology gives rise to 20% higher rate capability than bare Li4Ti5O12 nanofibers by facilitating the charge transfer kinetics. Our findings provide an effective way to improve the electrochemical performance of Li4Ti5O12 anodes for lithium rechargeable batteries.

关键词： spinel Li4Ti5012 (LTO) electrospinning silver doping lithium rechargeablebatteries 1D nanostructure

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