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Multifunctional MXene/Carbon Nanotube Janus Film for Electromagnetic Shielding and Infrared Shielding/Detection in Harsh Environments

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Nano-Micro Letters 2024年第10期16卷 543-560页

作者： Tufail Hassan Aamir Iqbal Byungkwon Yoo Jun Young Jo Nilufer Cakmakci Shabbir Madad Naqvi Hyerim Kim Sungmin Jung Noushad Hussain Ujala Zafar soo yeong ch. Seunghwan Jeong Jaewoo Kim Jung Min Oh Sangwoon Park Youngjin Jeong ch.ng Min Koo Sch.ol of Advanced Materials Science and Engineering Sungkyunkwan UniversitySeobu-ro 2066Jangan-guSuwon-siGyeonggi-do 16419Republic of Korea Department of Materials Science and Engineering Soongsil UniversitySeoul 06978Republic of Korea Institute of Advanced Composite Materials Korea Institute of Science and Technology92 Chudong-roBongdong-eupWanju-gunJeollabuk-do 55324Republic of Korea R&D Center INNOMXENE Co. Ltd.Daejeon 34365Republic of Korea Sch.ol of ch.mical Engineering Sungkyunkwan UniversitySeobu-ro 2066Jangan-guSuwon-siGyeonggi-do 16419Republic of Korea

Multifunctional,flexible,and robust thin films capable of operating in demanding harsh temperature environments are crucial for various cutting-edge *** study presents a multifunctional Janus film integrating highly-crystalline Ti_(3)C_(2)T_(x) MXene and mech.nically-robust carbon nanotube(CNT)film through strong hydrogen *** hybrid film not only exhibits high electrical conductivity(4250 S cm^(-1)),but also demonstrates robust mech.nical strength and durability in both extremely low and high temperature environments,showing exceptional resistance to thermal *** hybrid Janus film of 15μm thickness reveals remarkable multifunctionality,including efficient electromagnetic shielding effectiveness of 72 dB in X band frequency range,excellent infrared(IR)shielding capability with an average emissivity of 0.09(a minimal value of 0.02),superior thermal camouflage performance over a wide temperature range(−1 to 300℃)ach.eving a notable reduction in the radiated temperature by 243℃ against a background temperature of 300℃,and outstanding IR detection capability ch.racterized by a 44%increase in resistance when exposed to 250 W IR *** multifunctional MXene/CNT Janus film offers a feasible solution for electromagnetic shielding and IR shielding/detection under ch.llenging conditions.

关键词： MXene/carbon nanotube Janus film Electromagnetic interference shielding Infrared shielding Thermal camouflage Infrared detection

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Real-Time Tunable Gas Sensing Platform Based on SnO_(2) Nanoparticles Activated by Blue Micro-Light-Emitting Diodes

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Nano-Micro Letters 2024年第12期16卷 103-119页

作者： Gi Baek Nam Jung-El Ryu Tae Hoon Eom Seung Ju Kim Jun Min Suh Seungmin Lee Sungkyun ch.i ch.on Woo Moon Seon Ju Park soo Min Lee Byungsoo Kim Sung Hyuk Park Jin Wook Yang Sangjin Min Sohyeon Park Sung Hwan ch. Hyuk Jin Kim Sang Eon Jun Tae Hyung Lee yeong Jae Kim Jae Young Kim Young Joon Hong Jong-In Shim Hyung-Gi Byun Yongjo Park Inkyu Park Sang-Wan Ryu Ho Won Jang Department of Materials Science and Engineering Seoul National UniversitySeoul 08826Republic of Korea Research.Laboratory of Electronics Department of Mechanical EngineeringMassachusetts Institute of TechnologyCambridgeMA 02139USA Ming Hsieh Department of Electrical and Computer Engineering University of Southern CaliforniaLos AngelesCA 90089USA Department of Display Materials Engineering Soonchunhyang UniversityAsan 31538Republic of Korea Department of Photonics and Nanoelectronics BK21 FOUR ERICA-ACE CenterHanyang University ERICAAnsan 15588Republic of Korea Department of Nanotech.ology and Advanced Materials Engineering Sejong UniversitySeoul 05006Republic of Korea Department of Electronics Information and Communication EngineeringKangwon National UniversitySamcheok 25913Republic of Korea Advance Institute of Convergence Tech.ology Seoul National UniversitySuwon 16229Republic of Korea Department of Mech.nical Engineering Korea Advanced Institute of Science and TechnologyDaejeon 34141Republic of Korea Department of Physics Chonnam National UniversityGwangju 500-757Republic of Korea

Micro-light-emitting diodes(μLEDs)have gained significant interest as an activation source for gas sensors owing to their advantages,including room temperature operation and low power ***,despite these benefits,ch.llenges still exist such.as a limited range of detectable gases and slow *** this study,we present a blueμLED-integrated light-activated gas sensor array based on SnO_(2)nanoparticles(NPs)that exhibit excellent sensitivity,tunable selectivity,and rapid detection with micro-watt level power *** optimal power forμLED is observed at the highest gas response,supported by finite-difference time-domain ***,we first report the visible light-activated selective detection of reducing gases using noble metal-decorated SnO_(2)*** noble metals induce catalytic interaction with reducing gases,clearly distinguishing NH3,H2,and ***-time gas monitoring based on a fully hardwareimplemented light-activated sensing array was demonstrated,opening up new avenues for advancements in light-activated electronic nose tech.ologies.

关键词： Micro-LED Gas sensor array Low power consumption Metal decoration Real-time detection

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Surface-modified Ag@Ru-P25 for photocatalytic CO_(2) conversion with high selectivity over ch.(4) formation at the solid–gas interface

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Carbon Energy 2024年第1期6卷 182-196页

作者： ch.itanya B.Hiragond Sohag Biswas Niket SPowar Junho Lee Eunhee Gong Hwapyong Kim Hong soo Kim Jin-Woo Jung ch.ng-Hee ch. Bryan M.Wong Su-Il In Department of Energy Science&Engineering Daegu Gyeongbuk Institute of Science and Technology(DGIST)DaeguRepublic of Korea Department of ch.mical&Environmental Engineering Materials Science&Engineering ProgramDepartment of ChemistryDepartment of Physics&AstronomyUniversity of California-RiversideRiversideCaliforniaUSA Department of Physics and ch.mistry Daegu Gyeongbuk Institute of Science and Technology(DGIST)DaeguRepublic of Korea NiceScience Corporation DaeguRepublic of Korea

Systematic optimization of the photocatalyst and investigation of the role of each.component is important to maximizing catalytic activity and comprehending the photocatalytic conversion of CO_(2) reduction to solar fuels.A surface-modified Ag@Ru-P25 photocatalyst with H_(2)O_(2) treatment was designed in this study to convert CO_(2) and H_(2)O vapor into highly selective *** doping followed by Ag nanoparticles(NPs)cocatalyst deposition on P25(TiO_(2))enhances visible light absorption and ch.rge separation,whereas H_(2)O_(2) treatment modifies the surface of the photocatalyst with hydroxyl(–OH)groups and promotes CO_(2) ***-resonance transmission electron microscopy,X-ray photoelectron spectroscopy,X-ray absorption near-edge structure,and extended X-ray absorption fine structure tech.iques were used to analyze the surface and ch.mical composition of the photocatalyst,while thermogravimetric analysis,CO_(2) adsorption isotherm,and temperature programmed desorption study were performed to examine the significance of H_(2)O_(2) treatment in increasing CO_(2) reduction *** optimized Ag1.0@Ru1.0-P25 photocatalyst performed excellent CO_(2) reduction activity into CO,ch.,and C2H6 with a~95%selectivity of ch.,where the activity was~135 times higher than that of pristine TiO_(2)(P25).For the first time,this work explored the effect of H_(2)O_(2) treatment on the photocatalyst that dramatically increases CO_(2) reduction activity.

关键词： gas-phase CO_(2) reduction H_(2)O_(2) treatment plasmonic nanoparticles solar fuel photocatalyst surface modification

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Pharmacological advantages of melatonin in immunosenescence by improving activity of T lymphocytes

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The Journal of Biomedical Research 2016年第4期30卷 314-321页

作者： yeong-Min Yoo Su Kil Jang Gwang-Hoon Kim Jung-Youl Park Seong-soo Joo Department of Biomedical Engineering College of Health ScienceYonsei UniversityWonjuGangwon-do 220-710Republic of Korea College of Life Science Gangneung-Wonju National UniversityGangneungGangwon-do 210-702Republic of Korea Industry-Academic Cooperation Foundation Hanbat National UniversityDaejeon 305-719Republic of Korea

Melatonin plays a critical role in regulating photoperiodic signals and has recently been shown to decrease immunosenescence with age. In this study, we examined whether melatonin activates T lymphocytes as major adaptive immune cells in in vitro and in vivo models. Splenocytes, CD4＋, and naive CD4 T lymphocytes were isolated from the spleen of BALB/c mice and the cell population patterns and mRNA profiles associated with T cell activation （CD28 and p21） and the melatonin receptor （MT1A and MT1B） were assessed. The T cell activation- related proteins Ki67 and Bcl2 were also evaluated to confirm the relationship between gene and protein levels. Our data clearly revealed that CD28, p21, MT 1 A, and MT 1B mRNA were highly expressed in the presence of melatonin. Co-culture of CD4＋ T lymphocyte and peritoneal macrophage 7 days after melatonin administration to young and aged mice significantly increased APRIL mRNA, suggesting induction or maintenance of T lymphocyte responses. We also found that the intracellular amount of Ki67 and Bcl2 proteins were significantly upregulated in aged CD4＋ T lymphocytes, suggesting enhancing T cell proliferation and ling-term maintenance of memory T cells. Taken together, we conclude that melatonin supplementation may enhance immunity in aged individuals by upregulating immunosenescence indices in association with T lymphocytes and may be an attractive pharmacological candidate for aged and immunocompromised individuals.

关键词： melatonin aging CD4+ naive CD4 melatonin receptor

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Gram-negative bacteria and their lipopolysacch.rides in Alzheimer’s disease:pathologic roles and therapeutic implications

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Translational Neurodegeneration 2021年第4期10卷 643-665页

作者： Hyeon soo Kim Sujin Kim soo Jung Shin Yong Ho Park Yunkwon Nam ch.e won Kim Kang won Lee Sung-Min Kim In Duk Jung Hyun Duk Yang yeong-Min Park Minho Moon Department of Bioch.mistry College of MedicineKonyang UniversityDaejeon 35365Republic of Korea Research.Institute for Dementia Science Konyang UniversityDaejeon 35365Republic of Korea Dandi Bioscience Inc 6th Floor of Real Company Building66Achasan-roSungdong-guSeoulRepublic of Korea Harvard Neurology Clinic 294 Gwanggyojungang-roSuji-guYongin 16943Republic of Korea Department of Immunology School of MedicineKonkuk University268ChungwondaeroChungju-siChungcheongbuk-doRepublic of Korea

Alzheimer's disease(AD)is the most serious age-related neurodegenerative disease and causes destructive and irreversible cognitive *** in the development of therapeutics targeting amyloid-β(Aβ)and tau;principal proteins inducing pathology in AD,suggest a paradigm shift towards the development of new therapeutic *** gram-negative bacteria and lipopolysacch.rides(LPS)are attractive new targets for AD ***,an altered distribution of gram-negative bacteria and their LPS has been reported in AD ***,gram-negative bacteria and their LPS have been shown to affect a variety of AD-related pathologies,such.as Aβ homeostasis,tau pathology,neuroinflammation,and ***,therapeutic approach.s targeting gram-negative bacteria or gram-negative bacterial molecules have significantly alleviated AD-related pathology and cognitive *** multiple evidence showing that the gram-negative bacteria and their LPS play a crucial role in AD pathogenesis,the pathogenic mech.nisms of gram-negative bacteria and their LPS have not been ***,we summarize the roles and pathomech.nisms of gram-negative bacteria and LPS in ***,we discuss the possibility of using gram-negative bacteria and gram-negative bacterial molecules as novel therapeutic targets and new pathological ch.racteristics for AD.

关键词： Alzheimer's disease Gram-negative bacteria Lipopolysacch.ride Exotoxin Amyloid beta Tau

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Design of 32-bit differential paired eFuse OTP memory in a form of two-dimensional array

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Journal of Central South University 2012年第12期19卷 3484-3491页

作者： KIM Yoon-kyu JANG Ji-hye YOON Geon-soo LEE Dong-hoon HA Man-yeong HA Pan-bong KIM Young-hee Department of Electronic Engineering Changwon National University9 Sarim-DongChangwon 641-773Korea

A differential paired eFuse OTP(one-time programmable)memory cell which.can be configured into a 2D(two-dimensional)eFuse cell array was *** sensible resistance of a programmed eFuse link is a half smaller than that of the single-ended counterpart and BL datum can be sensed without a reference *** this 2D array of differential paired eFuse OTP memory cells,we design a 32-bit eFuse OTP memory *** use a sense amplifier based D F/F circuit as the BL(bit-line)SA(sense amplifier)and design a sensing margin test circuit with a variable pull-up *** is confirmed by the function test that the designed 32-bit OTP memory IP functions normally on 30 sample dies.

关键词： eFuse one-time programmable memory 2-dimensional array

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A Ceiling Feature-based Vision Control System for a Service Robot

A Ceiling Feature-based Vision Control System for a Service ...

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第36届中国控制会议

作者： Wenjuan Wang Zhendong Luo Peipei Song Shili Sheng Yimei Rao Yew Guan soo ch. Fai yeong Feng Duan College of Computer and Control Engineering Nankai University Universiti Teknikal Malaysia Melaka Universiti Teknologi Malaysia

ISBN: (纸本)9781538629185

In this paper,we proposed a vision control system for a service robot which.can provide navigation and assistance for daily *** with other sensors,vision sensor is ch.ap and practical,and can also perceive most of the information in the surrounding *** the variability of indoor objects,we ch.ose an upward camera as the only sensor to extract objects and straight lines on the *** functional objects such.as lights and alarms on the ceiling are detected by template match.ng to navigate the way of the *** the straight line features,which.are rich.on the ceiling,are used to correct the orientation of the *** our work,we clustered the angles of lines and refined the angles based on line *** experiments have been conducted to confirm that straight line features detected in the image can calculate the orientations correctly and the orientations are more accurate with the *** the final stage,we performed several tests on the system and the results demonstrate that the robot with vision control system has been successfully implemented the predesigned tasks.

关键词： service robot ceiling feature orientation correction

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Extracts from Paeonia lactiflora Pallas, Rehmannia Glutinosa var. Purpurea Makino, Perilla Frutescens var. Acuta Kudo may increase the endometrial receptivity through expression of leukemia inhibitory factor and adhesion molecules

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Journal of Traditional ch.nese Medicine 2019年第1期39卷 15-25页

作者： Eun-yeong Kim Tae-Wook ch.ng Hee-Jung ch.i Yeon-Seop Jung Syng-Ook Lee Jun-Yong ch.i Hyung Sik Kim sooseong You Myeong soo Lee Ki-Tae Ha Sch.ol of Korean Medicine and Korean Medical Research.Center for Healthy Aging Pusan National UniversityYangsan 50612Republic of Korea Graduate Training Program of Korean Medicine for Healthy-aging Pusan National UniversityYangsan 50612Republic of Korea Department of Food Science and Tech.ology Keimyung UniversityDaegu 42601Republic of Korea National Clinical Research.Center for Korean Medicine Korean Medicine Hospital of Pusan National UniversityYangsan 50612Republic of Korea Laboratory of Molecular Toxicology School of PharmacySungKyunKwan UniversitySuwon 16419Republic of Korea Korea Institute of Oriental Medicine Daejeon 34054Republic of Korea

OBJECTIVE: To find out the combination of the extracts from Paeonia lactiflora Pallas(PL), Rehmannia Glutinosa var. Purpurea Makino(RG), Perilla Frutescens var. Acuta Kudo(PF) to increase endometrial ***: Herbal medicines were extracted with boiling water and polysacch.rides were *** examined the effect of PL, RG, and PF(PRP), a most effective herbal formula deduced from constitutive ingredient herbs of Antai Yin which.is composed of PRP, on the leukemia inhibitory factor(LIF) expression and endometrial ***: The combination of the extracts from PRP induced the LIF expression in Ishikawa cells and increased the adhesion between Ishikawa and JAr cells. In addition, PRP-induced attach.ent of JAr cells onto Ishikawa cells and expression of adhesion molecules, ITGAV, ITGB5, CD44 s, and Lselectin, are significantly reduced by knock-down of LIF ***: Induced by the combination of the PRP extracts, the adhesion between trophoblast and endometrial cells are mediated by expression of LIF and adhesion molecules. Thus, we suggest the combination of the PRP extracts may be a novel therapy for enhancing embryo implantation rate.

关键词： Paeonia Rehmannia Perilla Embryo implantation Endometrium Leukemia inhibitory factor Cell adhesion molecules

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Reliable high temperature, high humidity flexible thin film encapsulation using Al2O3/MgO nanolaminates for flexible OLEDs

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Nano Research 2020年第10期13卷 2716-2725页

作者： Ki Suk Kang So yeong Jeong Eun Gyo Jeong Kyung ch.ol ch.i Sch.ol of Eetrical Enginerng Korea Advanced lstute of Sciencp and Tch.noloy(KAIST) 291 Daehak roYuscong guDaejeon 34141Republic of Korea Department of Clothing and Textiles Chormam National University77 Yongbong.roBuk guGwangjiu 61186Republic of Korea

Since most organic materials are very sensitive to moisture and oxygen, organic light emitting diodes (OLEDs) require an encapsulation layer to protect the active layer from these gases. Since light, flexible and portable OLEDs are being employed in more diverse climates and environmental conditions, the OLED encapsulation layer must retain robust mech.nical properties and stability in high temperature/high humidity conditions. Al2O3 films have demonstrated excellent barrier performance, but they readily hydrolyze when exposed to prolonged harsh environments. In this study, we fabricated a thin film encapsulation (TFE) film that was resistant to hydrolysis, using Al2O3/MgO (AM) nanolaminates. MgO has superior resistance to harsh environments, and the aluminate phase generated by the ch.mical reaction of Al2O3 and MgO provided excellent barrier performance, even after storage in harsh conditions. A multi-barrier fabricated using the AM nanolaminate showed excellent barrier performance, close to the level required by OLEDs. It did not significantly deteriorate even after a bending test of 1,000 iterations at 0.63% strain. After 1,000 cycle of bending, the electrical properties of the passivated OLEDs were not significantly degraded at shelf-lifetime test where the fabricated device was stored for 50 days in a harsh environment of 60℃, 90% relative humidity. The multi-barrier shows the best performance compared to previous studies on flexible encapsulation that can be used in harsh environments.

关键词： thin film encapsulation nanolaminate structure Al2O3 MgO flexible organic light emitting diode(OLED)

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Occult hepatitis B virus infection is not associated with disease progression of ch.onic hepatitis C virus infection

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World Journal of Gastroenterology 2016年第42期22卷 9427-9436页

作者： Junhyeon ch. Sang soo Lee Yun Suk ch.i Yejoo Jeon Jung Wha ch.ng Joo yeong Baeg Won Keun Si Eun Sun Jang Jin-Wook Kim sook-Hyang Jeong Department of Internal Medicine Seoul National University College of Medicine Seoul National University Bundang Hospital Department of Internal Medicine Gyeongsang National University Changwon Hospital Gyeongsang National University College of Medicine

AIM To clarify the prevalence of occult hepatitis B virus(HBV) infection(OBI) and the association between OBI and liver disease progression, defined as development of liver cirrhosis or hepatocellular carcinoma(HCC), worsening of ch.ld-Pugh class, or mortality in cases of ch.onic hepatitis C virus(HCV) infection. METHODS This prospective cohort study enrolled 174 patients with ch.onic HCV infection(ch.onic hepatitis, n = 83; cirrhosis, n = 47; HCC, n = 44), and evaluated disease progression during a mean follow-up of 38.7 mo. OBI was defined as HBV DNA positivity in 2 or moredifferent viral genomic regions by nested polymerase ch.in reaction using 4 sets of primers in the S, C, P and X open reading frame of the HBV genome. RESULTS The overall OBI prevalence in ch.onic HCV patients at enrollment was 18.4%, with 16.9%, 25.5% and 13.6% in the ch.onic hepatitis C, liver cirrhosis and HCC groups, respectively(P = 0.845). During follow-up, 52 patients showed disease progression, which.was independently associated with aspartate aminotransferase > 40 IU/L, ch.ld-Pugh score and sustained virologic response(SVR), but not with OBI positivity. In 136 patients who were not in the SVR state during the study period, OBI positivity was associated with neither disease progression, nor HCC development. CONCLUSION The prevalence of OBI in ch.onic HCV patients was 18.4%, and OBI was not associated with disease progression in South Koreans.

关键词： Hepatitis B virus Hepatitis C virus Disease control Oncogenesis

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