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Enhancement of vertical phase separation in sequentially deposited organic photovoltaics through the independent processing of additives

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Journal of Energy Chemistry 2024年第7期94卷 768-777页

作者： Damin lee Changwoo Park Gayoung Ham Young Yong Kim sung-Nam Kwon Junyeong lee sungjin Jo seok-in Na Hyojung Cha Department of Hydrogen and Renewable Energy Kyungpook National UniversityDaegu 41566Republic of Korea Department of Energy Convergence and Climate Change Kyungpook National UniversityDaegu 41566Republic of Korea Pohang Accelerator Laboratory(PAL) Pohang University of Science and Technology(POSTECH)PohangGyeongbuk 37673Republic of Korea Department of Flexible and Printable Electronics Jeonbuk National UniversityJeonju-siJeollabuk-do 54896Republic of Korea school of Energy Engineering Kyungpook National UniversityDaegu 41566Republic of Korea

Herein,the impact of the independent control of processing additives on vertical phase separation in sequentially deposited (sD) organic photovoltaics (OPVs) and its subsequent effects on charge carrier kinetics at the electron donor-acceptor interface are *** film morphology exhibits notable variations,significantly depending on the layer to which 1,8-diiodooctane (DiO) was *** incidence wide-angle X-ray scattering analysis reveals distinctly separated donor/acceptor phases and vertical crystallinity details in sD ***-of-flight secondary ion mass spectrometry analysis is employed to obtain component distributions in diverse vertical phase structures of sD films depending on additive *** addition,nanosecond transient absorption spectroscopy shows that DiO control significantly affects the dynamics of separated charges in sD *** sD OPVs,DiO appears to act through distinct mechanisms with minimal restriction,depending on the applied *** study emphasizes the significance of morphological optimization in improving device performance and underscores the importance of independent additive control in the advancement of OPV technology.

关键词： sequential deposition Vertical phase separation Charge dynamics Organic photovoltaics Nonfullerene acceptors

Development and testing of a high-power s-band klystron at BiNP sB RAs

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Nuclear science and Techniques 2024年第7期35卷 58-67页

作者： A.Levichev A.Barnyakov s.samoylov D.Nikiforov V.ivanov M.Arsentyeva D.Chekmenev O.Pavlov i.Pivovarov Budker institute of Nuclear Physics Lavrentyeva Av.11NovosibirskRussia630090 Novosibirsk state University Pirogova Str.2NovosibirskRussia630090

This paper details the development and testing of the first working prototype of the s-band high-power klystron,accomplished at the Budker institute of Nuclear Physics,siberian Branch,Russian Academy of sciences(BiNP sB RAs).Upon testing,the klystron demonstrated the following parameters:an operating frequency of 2856 MHz and a peak power output of 50 *** paper presents the klystron's design,its constituent units,and pertinent processing procedures,along with discussions on the measurement of its parameters.

关键词： Klystron Linear accelerator Electron beam

investigation of acoustic attributes based on preference and perceptional acoustics of Korean traditional halls for optimal design solutions

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Building simulation 2024年第5期17卷 723-738页

作者： Beta Bayu santika Haram lee Jin Yong Jeon Department of Architectural Engineering Hanyang UniversitySeoul 04763R.0.Korea

immersed in the rich tapestry of traditional culture,Gugak,the traditional Korean music stands as a captivating embodiment of artistic *** study embarked on a comprehensive evaluation of a Gugak hall,employing acoustic measurements,computer simulations,and subjective perception *** evaluation focused on the reverberance,clarity,spatial impression,and preference,unravelling the secrets that shape the immersive Gugak *** intricate computer simulations and auralization,the experience of Gugak performances was meticulously brought to life,allowing exploration under diverse conditions by adjusting stage volume ratios from -20% to+20% and modifying the interior materials,including the walls,ceiling,and lateral *** Gugak halls exhibited relatively low values of reverberation time(RT),early decay time(EDT),and binaural quality index(BQi)the dominant factor influencing the acoustic environment was the effect of sound strength(G).Musical clarity(C80)value did not show an inverse proportionality to the reverberation ***,genre differences between traditional Korean and Western classical music did not significantly affect listeners’perception and satisfaction with regards to reverberance,clarity,and spatial *** a result,Gugak halls can adhere to the same acoustic design criteria as Western orchestra halls,since this study found that people perceived them the same *** this study,sound strength was found to be strongly correlated with perception *** was possible to enhance listeners’perception and preference regarding the acoustic environment through material and structural changes to the sidewalls and *** changes improved the reinforcement of low frequencies and simultaneously enhanced the relative effect of side ***,enhancing the reflection and spatial characteristics of the materials effectively improved listener *** on these findings,an optimal des

关键词： Korean traditional hall acoustical parameters perceptual evaluation acoustic preference stage volume ratio

Effect of solidification cooling rate on microstructure and tribology characteristics of Zn-4si alloy

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international Journal of Minerals,Metallurgy and Materials 2024年第2期31卷 362-373页

作者： F.Akbari M.Golkaram s.Beyrami G.shirazi K.Mantashloo R.Taghiabadi M.saghafi Yazdi i.Ansarian Department of Metallurgy and Material science Imam Khomeini International University(IKIU)Qazvin ***Iran

The main objective of this work was to modify the microstructure and enhance the tribological properties of a new Zn-4si al-loy through a high solidification cooling rate(sCR).According to the results,by increasing the sCR from 2.0 to 59.5℃/s the average size of primary si particles and that of the grains reduced from 76.1 and 3780μm to less than about 14.6 and 460μm,***-ing the sCR also enhanced the microstructural homogeneity,decreased the porosity content(by 50%),and increased the matrix hardness(by 36%).These microstructural changes enhanced the tribological *** instance,under the applied pressure of 0.5 MPa,an in-crease in the sCR from 2.0 to 59.5℃/s decreased the wear rate and the average friction coefficient of the alloy by 57%and 23%,*** wear mechanism was also changed from the severe delamination,adhesion,and abrasion in the slowly-cooled alloy to the mild tribolayer delamination/abrasion in the high-cooling-rate-solidified sample.

关键词： zinc-silicon alloy primary silicon solidification cooling rate tribology sliding wear

Recent advances and innovations in the design and fabrication of wearable flexible biosensors and human health monitoring systems based on conjugated polymers

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Bio-Design and Manufacturing 2024年第4期7卷 476-516页

作者： Vinh Van Tran Viet-Duc Phung Daeho lee Department of Mechanical Engineering Gachon UniversitySeongnam 13120Republic of Korea institute of Fundamental and Applied sciences Duy Tan UniversityHo Chi Minh City 700000Vietnam Faculty of Environmental and Chemical Engineering Duy Tan UniversityDa Nang 550000Vietnam

Wearable biosensors have received great interest as patient-friendly diagnostic technologies because of their high flexibility and *** growing research and utilization of novel materials in designing wearable biosensors have accelerated the development of point-of-care sensing platforms and implantable biomedical devices in human health *** numerous potential materials,conjugated polymers(CPs)are emerging as ideal choices for constructing high-performance wearable biosensors because of their outstanding conductive and mechanical ***,CPs have been extensively incorporated into various wearable biosensors to monitor a range of target ***,fabricating highly reliable CP-based wearable biosensors for practical applications remains a significant challenge,necessitating novel developmental strategies for enhancing the viability of such ***,this review aims to provide consolidated scientific evidence by summarizing and evaluating recent studies focused on designing and fabricating CP-based wearable biosensors,thereby facilitating future *** the superior properties and benefits of CPs,this review aims to clarify their potential applicability within this ***,the fundamentals and main components of CP-based wearable biosensors and their sensing mechanisms are discussed in *** recent advancements in CP nanostructures and hybridizations for improved sensing performance,along with recent innovations in next-generation wearable biosensors are *** wearable biosensors have been—and will continue to be—an ideal platform for developing effective and user-friendly diagnostic technologies for human health monitoring.

关键词： Conjugated polymers Wearable biosensors E-skin electronics implantable biosensors Conductive polymer hydrogels

Effects of low molecular weight polysaccharide from sargassum thunbergii against palmitic acid-induced intracellular lipid accumulation in 3T3-L1 adipocyte and HepG2 cells

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Food science and Human Wellness 2024年第4期13卷 2244-2252页

作者： Hyo-Geun lee D.P.Nagahawatta M.J.M.s.Kurera Kyung-Mo song Yun-sang Choi You-Jin Jeon Min-Cheol Kang Department of Marine Life sciences Jeju National UniversityJeju 63243Republic of Korea Department of Biotechnology Faculty of Agriculture and Plantation ManagementWayamba University of Sri LankaMakanduraGonawila(NWP)60170Sri Lanka Research Group of Food Processing Korea Food Research Institute245Wanju 55365Republic of Korea

Low molecular weight polysaccharides can be isolated from sargassum thunbergii(LMPsT)and in vitro experiments were conducted to evaluate the inhibitory effects on *** natures of LMPsT were attained from *** and appraised their LMPsT on palmitic acid(PA)induced lipid accretion in Hep G2,and 3T3-L1 *** treatment lessened lipid deposition and intracellular free fatty acid and triglyceride intensities in PA-treated above mentioned *** mechanistic study publicized that LMPsT2 significantly suppressed adipogenesis and stimulated the PA-treated 3T3-L1 cells occupied in the lipolysis ***,in PA-treated Hep G2 cells,the free fatty acid oxidation was significantly increased by *** these constructive properties of LMPsT2 from ***,is a potential candidate for diminishing the intracellular lipids,and for a therapeutic agent in those conditions.

关键词： sargassum thunbergii Low molecular weight polysaccharide Lipid accumulation Obesity Liver steatosis

Utilization of biomarkers for the prognostic prediction of cardiac arrest survivors using a multi-modal approach

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World Journal of Emergency Medicine 2024年第2期15卷 131-134页

作者： Changshin Kang Yeonho You Jung soo Park Byeong Kwon Park Jae Kwang lee Byung Kook lee Department of Emergency Medicine College of MedicineChungnam National UniversityDaejeon 35015Republic of Korea Department of Emergency Medicine Chungnam National University HospitalDaejoen 35015Republic of Korea Department of Emergency Medicine Konyang University HospitalCollege of MedicineDaejeon 35015Republic of Korea Department of Emergency Medicine Chonnam National University Medical SchoolChonnam National University HospitalGwangju 61469Republic of Korea

international guidelines for post-cardiac arrest care recommend using multi-modal strategies to avoid the withdrawal of life-sustaining therapy(WLsT)in patients with the potential for neurological recovery.[1]However,a clear methodology for multi-modal approaches has yet to be ***-specific enolase(NsE)is currently the only recommended biomarker,and the European Resuscitation Council(ERC)and the European societyofintensiveCareMedicine(EsiCM)have proposed a cutoff value of 60μg/L at 48 and/or 72 h after the return of spontaneous circulation(ROsC)as a multimodal prognostic tool for predicting poor neurological outcomes.

关键词： cardiac modal return

Air-stable,all-dry transferred Res_(2)/Gase heterostructure-based NO_(2)gas sensor

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Journal of Materials science & Technology 2024年第1期168卷 79-87页

作者： A.Venkatesan Hyeyoon Ryu Anupom Devnath Hyungyu Yoo seunghyun lee Department of Electronic Engineering Kyung Hee UniversityYongin-Si 17104South Korea Department of Electronics and information Convergence Engineering Kyung Hee UniversityYongin-Si 17104South Korea

Two-dimensional(2D)materials have gained considerable attention in chemical sensing owing to their naturally high surface-to-volume ***,the poor response time and incomplete recovery re-strict their application in practical,high performance gas *** this work,we fabricated air-stable Res_(2)/Gase heterostructure-based NO_(2)gas sensors with excellent gas sensing response,recovery,selectiv-ity and a low limit of detection(LOD)toward nitrogen dioxide(NO_(2)).The Res_(2)/Gase heterostructure was prepared via mechanical exfoliation and an all-dry transfer *** the sensing measurements,temperature-dependant transport measurements were carried *** schottky Barrier Height(sBH)of the Res_(2)/Gase heterostructure was calculated and the corresponding transport mechanisms were *** fabricated gas sensors showed a significant response enhancement with full reversibility to-ward ppm-level NO_(2)(response of∼17%at 3 ppm,a LOD of∼556 ppb)at an operating temperature of(33°C).in particular,the total response and recovery time of the Res_(2)/Gase was revealed to be less than 4 min(∼38 s and∼174 s,respectively)for the 250 ppm concentration,which is one of the best response and recovery time toward ppm-level NO_(2).The excellent sensing performances and recovery characteris-tics of the Res_(2)/Gase structure are attributed to its efficient charge separation,unique interlayer coupling and desirable band *** atomically thin,ultrasensitive gas sensor that operates at room tem-perature is a strong technological contender to conventional metal oxide gas sensors,which often require elevated temperatures.

关键词： 2D materials All-dry transfer Gas sensor Van der Waals heterostructure Res_(2)/Gase Gas sensing response Transition metal dichalcogenide

Evaluation of internal void related defects in reinforced concrete slab using electromagnetic wave properties

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Earthquake Engineering and Engineering Vibration 2024年第3期23卷 525-535页

作者： Minju Kang Jinyoung Hong Taemin lee Doyun Kim Hajin Choi school of Architecture Soongsil UniversitySeoul 06978Republic of Korea

This study aims to develop a damage-detection algorithm based on the electromagnetic wave properties inside a reinforced concrete *** proposed method involves employing two algorithms based on data measured using ground-penetrating radar—a common electromagnetic wave method in civil *** possible defect area was identified based on the energy dissipated by the damage in the frequency-wavenumber domain,with the damage localized using the calculated relative permittivity of the *** proposed method was verified through a finite difference time-domain-based numerical analysis and a testing slab with artificial *** a result of verification,the proposed method quickly identified the presence of damage inside the concrete,especially for honeycomb-like defects located at the top of the *** study has practical significance in scanning structures over a large area more quickly than other non-destructive testing methods,such as ultrasonic methods.

关键词： GPR concrete defect electromagnetic wave relative permittivity non-destructive testing(NDT)