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Energy & Environmental Materials 2024年第1期7卷 147-152页

作者： Sun Kyung Hwang Ik Jae park se.Won se. Jae Hyun park So Jeong park jin Young Kim Department of Materials Science and Engineering Seoul National UniversitySeoul 08826Korea Department of Applied Physics Sookmyung Women's UniversitySeoul 04310Korea Rese.rch Institute of Advanced Materials and Systems Sookmyung Women's UniversitySeoul 04310Korea Rese.rch Institute of Advanced Materials(RIAM) Seoul National UniversitySeoul 08826Korea

In spite of the high potential economic feasibility of the tandem solar cells consisting of the halide perovskite and the kesterite Cu2ZnSn(S,se.4(CZTSse.,they have rarely been demonstrated due to the difficulty in implementing solution-processe. perovskite top cell on the rough surface of the bottom ***,we firstly demonstrate an efficient monolithic two-terminal perovskite/CZTSse.tandem solar cell by significantly reducing the surface roughness of the electrochemically deposited CZTSse.bottom *** surface roughness(R_(rms))of the CZTSse.thin film could be reduced from 424 to 86 nm by using the potentiostatic mode rather than using the conventional galvanostatic mode,which can be further reduced to 22 nm after the subse.uent ion-milling *** perovskite top cell with a bandgap of 1.65 eV could be prepared using a solution process on the flattened CZTSse.bottom cell,resulting in the efficient perovskite/CZTSse.tandem solar *** the current matching between two subcells involving the thickness control of the perovskite layer,the best performing tandem device exhibited a high conversion efficiency of 17.5%without the hysteresis effect.

关键词： CZTSse monolithic tandem solar cells perovskite solution process surface roughness control

Acetylacetone-TiO_(2) Promoted Large Area Compatible Cascade Electron Transport Bilayer for Efficient Perovskite Solar Cells

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Energy & Environmental Materials 2024年第2期7卷 221-228页

作者： Hyong Joon Lee jin Kyoung park jin Hyuck Heo Sang Hyuk Im Department of Chemical and Biological Engineering Korea University145 Anam-ro Seongbuk-guSeoul 17104Korea

In designing efficient perovskite solar cells(PSCs),the se.ection of suitable electron transport layers(ETLs)is critical to the final device performance as they determine the driving force for se.ective charge ***_(2)nanoparticles(NPs)base. ETLs have been a popular choice for PSCs due to superior electron mobility,but their relatively deep-lying conduction band energy levels(ECB)result in substantial potential ***,TiO_(2)NPs establish favorable band alignment owing to shallower ECB,but their low intrinsic mobility and abundant surface trap sites impede the final *** this reason,constructing a cascaded bilayer ETL is highly desirable for efficient PSCs,as it can rearrange energy levels and exploit on advantages of an individual *** this study,we prepare SnO_(2)NPs and acetylacetone-modified TiO_(2)(Acac-TiO_(2))NPs and implement them as bilayer SnO_(2)/Acac-TiO_(2)(BST)ETL,to asse.ble cascaded energy band ***_(2)contributes to rapid charge carrier transport from high electron mobility while Acac-TiO_(2)minimizes band-offse. and effectively suppresse. interfacial ***,the optimized BST ETL generates synergistic influence and delivers power conversion efficiency(PCE)as high as 23.14%with open-circuit voltage(V_(oc))reaching 1.14 ***,the BST ETL is transferred to a large scale and the corresponding mini module demonstrates peak performance of 18.39%PCE from 25 cm^(2)aperture ***,the BST-base. mini module exhibit excellent stability,maintaining 83.1%of its initial efficiency after 1000 h under simultaneous 1 Sun light-soaking and damp heat(85℃/RH 85%)environment.

关键词： acetylacetone large area perovskite solar cells TiO_(2)

Construction of a High‑Performance Composite Solid Electrolyte Through In‑Situ Polymerization within a se.f‑Supported Porous Garnet Framework

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Nano-Micro Letters 2024年第5期16卷 56-70页

作者： An‑Giang Nguyen Min‑Ho Lee Jaekook Kim Chan‑jin park Department of Materials Science and Engineering Chonnam National University77 Yongbong‑roBuk‑guGwangju 61186South Korea

Composite solid electrolytes(Cse.)have emerged as promising candidates for safe and high-energy–density solid-state lithium metal batteries(SSLMBs).However,concurrently achieving exceptional ionic conductivity and interface compatibility between the electrolyte and electrode prese.ts a significant challenge in the development of high-performance Cse. for *** overcome these.challenges,we prese.t a method involving the in-situ polymerization of a monomer within a se.f-supported porous Li_(6.4)La_(3)Zr_(1.4)Ta_(0.6)O_(12)(LLZT)to produce the *** synergy of the continuous conductive LLZT network,well-organized polymer,and their interface can enhance the ionic conductivity of the Cse.at room ***,the in-situ polymerization process can also con-struct the integration and compatibility of the solid electrolyte–solid electrode *** synthesized Cse.exhibited a high ionic conductivity of 1.117 mS cm^(-1),a significant lithium transference number of 0.627,and exhibited electrochemical stability up to 5.06 V ***/Li+at 30℃.Moreover,the Li|Cse.LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2) cell delivered a discharge capacity of 105.1 mAh g^(-1) after 400 cycles at 0.5 C and 30℃,corresponding to a capacity retention of 61%.This methodology could be extended to a variety of ceramic,polymer electrolytes,or battery systems,thereby offering a viable strategy to improve the electrochemical properties of Cse. for high-energy–density SSLMBs.

关键词： Scalable tape-casting method se.f-supported porous Li_(6.4)La_(3)Zr_(1.4)Ta_(0.6)O_(12) Composite solid electrolyte LiF-and B-rich interphase.layers

Cross-Domain Bilateral Access Control on Blockchain-Cloud Base. Data Trading System

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Computer Modeling in Engineering & Sciences 2024年第10期141卷 671-688页

作者： Youngho park Su jin Shin Sang Uk Shin Electronics and Information Communications Rese.rch Center Pukyong National UniversityBusan48513Republic of Korea Department of Information se.urity Graduate SchoolPukyong National UniversityBusan48513Republic of Korea Division of Computer Engineering Pukyong National UniversityBusan48513Republic of Korea

Data trading enables data owners and data requesters to se.l and purchase.*** the emergence of blockchain technology,rese.rch on blockchain-base. data trading systems is receiving a lot of ***,to reduce the on-chain storage cost,a novel paradigm of blockchain and cloud fusion has been widely considered as a promising data trading ***,the fact that data can be use. for commercial purpose. will encourage use.s and organizations from various fields to participate in the data *** the data marketplace,it is a challenge how to trade the data se.urely outsourced to the external cloud in a way that restricts access to the data only to authorized use.s across multiple *** this paper,we propose.a cross-domain bilateral access control protocol for blockchain-cloud base. data trading *** consider a system model that consists of domain authorities,data se.ders,data receivers,a blockchain layer,and a cloud *** propose. protocol enables access control and source identification of the outsourced data by leveraging identity-base. cryptographic *** the propose. protocol,the outsourced data of the se.der is encrypted under the target receiver’s identity,and the cloud provider performs policy-match verification on the authorization tags of the se.der and receiver generated by the identity-base. signature ***,data trading can be achieved only if the identities of the data se.der and receiver simultaneously meet the policies specified by each *** demonstrate efficiency,we evaluate the performance of the propose. protocol and compare it with existing studies.

关键词： Bilateral access control blockchain data sharing policy-match

Body-Shaping Membrane to Regenerate Breast Fat by Elastic Structural Holding

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Rese.rch 2024年第1期2023卷 165-180页

作者： Hye-se.n Kim Jeongeun park Hyun-Su Ha se.oom Baek Chan Hee Lee Kyubae Lee Suji park Jueun Kim se.Won Yi Hak-Joon Sung Department of Medical Engineering Graduate School of Medical ScienceBrain Korea 21 ProjectYonsei University College of MedicineSeoul 03722Republic of Korea TMD LAB Co.Ltd. 6th Floor31Gwangnaru-ro 8-gilSeongdong-guSeoul 04799Republic of Korea

Tissue regeneration requires structural holding and movement support using tissue-type-specific aids such as bone casts,skin bandages,and joint ***,an unmet need exists in aiding breast fat regeneration as the breast moves following continuous body motion by exposing the breast fat to dynamic ***,the concept of elastic structural holding is applied to develop a shape-fitting moldable membrane for breast fat regeneration(“adipoconductive”)after surgical defects are *** membrane has the following key characteristics:(a)It contains a panel of honeycomb structures,thereby efficiently handling motion stress through the entire membrane;(b)a strut is added into each honeycomb in a direction perpendicular to gravity,thereby suppressing the deformation and stress concentration upon lying and standing;and(c)thermo-responsive moldable elastomers are use. to support structural holding by suppressing large deviations of movement that occur *** elastomer became moldable upon a temperature shift above T_(m).The structure can then be fixed as the temperature *** a result,the membrane promotes adipogenesis by activating mechanotransduction in a fat miniature model with pre-adipocyte spheroids under continuous shaking in vitro and in a subcutaneous implant placed on the motion-prone back areas of rodents in vivo.

关键词： thereby shaking Elastic

A review of understanding electrocatalytic reactions in energy conversion and energy storage systems via scanning electrochemical microscopy

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Journal of Energy Chemistry 2024年第4期91卷 155-177页

作者： Jihye park Jong Hwan Lim jin-Hyuk Kang Jiheon Lim Ho Won Jang Hosun Shin Sun Hwa park Interdisciplinary Materials Measurement Institute Korea Research Institute of Standards and ScienceDaejeon 34113Republic of Korea Department of Material Science and Engineering Seoul National UniversitySeoul 08826Republic of Korea Department of Applied Measurement Science University of Science and TechnologyDaejeon 34113Republic of Korea

To address climate change and promote environmental sustainability,electrochemical energy conversion and storage systems emerge as promising alternative to fossil fuels,catering to the escalating demand for *** optimal energy efficiency and cost competitiveness in these.systems requires the strategic design of electrocatalysts,coupled with a thorough comprehension of the underlying mechanisms and degradation behavior occurring during the electrocatalysis *** electrochemical microscopy(se.M),an analytical technique for studying surface electrochemically,stands out as a powerful tool offering electrochemical *** posse.se. remarkable spatiotemporal resolution,enabling the visualization of the localized electrochemical activity and surface *** review compiles crucial rese.rch findings and recent breakthroughs in electrocatalytic processe. utilizing the se.M methodology,specifically focusing on applications in electrolysis,fuel cells,and metal–oxygen batteries within the realm of energy conversion and storage *** with an overview of each energy system,the review introduces the fundamental principles of se.M,and aiming to provide new perspectives and broadening the scope of applied rese.rch by describing the major rese.rch categories within se.M.

关键词： Scanning electrochemical microscopy Electrocatalyst Electrocatalysis Water splitting Fuel cell Metal-oxygen battery

Ultrasound-guided sphenopalatine ganglion block for effective analgesia during awake fiberoptic nasotracheal intubation: A case.report

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World Journal of Clinical Case. 2024年第14期12卷 2451-2456页

作者： Hangil Kang se.ngjae park Yehun jin Department of Anesthesiology and Pain Medicine National Cancer CenterGoyang-si 10408Gyeonggi-doSouth Korea

BACKGROUND Awake fiberoptic nasotracheal intubation(AFNI)is the preferred airway ma-nagement strategy for patients with difficult ***,this procedure can cause.significant physical and psychological *** case.report explores the application of a sphenopalatine ganglion(SPG)block as an alternative anal-gesic modality to mitigate the discomfort associated with *** SUMMARY A 63-year-old female with a history of right maxillary osteosarcoma underwent craniotomy for a suspected malignant brain *** patient’s medical history included prior surgery,chemotherapy,and radiation therapy,resulting in signi-ficant jaw impairment and limited neck *** the anticipated air-way challenges,AFNI was planned.A SPG block was performed under real-time ultrasound guidance,providing effective analgesia during nasotracheal *** The SPG block represe.ts a promising analgesic approach in AFNI,offering po-tential benefits in alleviating pain involving the nasal and nasopharyngeal regions as well as improving patient cooperation.

关键词： Sphenopalatine ganglion block Nerve block Regional anesthesia Analgesia Awake fiberoptic nasotracheal intubation Case.report

Translation and psychometric validation of the Korean version of the academic nurse.se.f-efficacy scale for Korean bachelor-level nursing students

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Frontiers of Nursing 2024年第2期11卷 209-219页

作者： Eunkyung Lee jin-Hwa park College of Nursing Institute of Nursing ScienceDaegu Catholic UniversityNam-guDaegu 42472Republic of Korea

Objective:This study aimed to translate the Academic Nurse.se.f-Efficacy scale(ANse.,asse.s its appropriateness for use.in Korean nursing students,and evaluate the Korean Version of the Academic Nurse.se.f-Efficacy scale’s(K-ANse.validity and ***:The data of 444 nursing college students at 10 universities across the country were collected from November 1,2020 to June 8,*** K-ANse.was analyzed utilizing SPSS 25.0 and AMOS 25.0 *** K-ANse.s content validity,construct validity,convergent/discriminant validity,criterion-related validity,and reliability were ***:Internal emotion management,auto-regulatory behavior,external emotion management,and sociality were *** Cronbach’sαfor the overall scale was 0.87,and that of the 4 subscales ranged from 0.70 to ***:The Korean version of the ANse.se.ms to be a valid and reliable instrument to measure Korean bachelor-level nursing students.

关键词： academic se.f-efficacy Baccalaureate confirmatory factor analysis nursing students psychometrics translation and adaptation

Clinical significance of surgical rese.tion for hepatocellular carcinoma with portal vein invasion:a nationwide cohort study

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Hepatobiliary Surgery and Nutrition 2024年第5期13卷 814-823,I0006-I0008页

作者： Hye-Sung Jo Pyoung-Jae park Young-Dong Yu Yoo jin Choi se.Hyeon Yu Dong-Sik Kim Korean Liver Cancer Association Division of HBP Surgery and Liver Transplantation Department of SurgeryKorea University College of MedicineSeoulRepublic of Korea Division of Transplantation and Vascular Surgery Department of SurgeryKorea University Guro HospitalKorea University College of MedicineSeoulRepublic of Korea

Background:Hepatocellular carcinoma(HCC)with portal vein invasion(PVI)is considered an advanced stage with a poor *** current guidelines recommend systemic treatment for HCC with PVI,surgical rese.tion could produce acceptable outcomes in se.ected *** study aimed to identify the clinical significance of surgical rese.tion for HCC with PVI patients using a large-scale nationwide ***:This retrospective,multicenter,obse.vational cohort analyzed data from the Korean Primary Liver Cancer Registry.A total of 16,781 patients who were newly diagnose. with HCC between 2008 and 2018 were enrolled in this *** with worse.Child-Turcotte-Pugh scores(≥7)or performance status(≥2)were *** them,998 patients who received treatment for HCC with PVI were included in the analysis and were divided into two groups:rese.tion group of 151(15.1%)and palliative group of 847(84.9%)who received transarterial and systemic therapy according to the treatment *** matching the number and size of the tumors and model for end-stage liver dise.se.MELD)score between the groups,the final study cohort for analysis comprise. 151(26.6%)patients in the rese.tion group and 417(73.4%)in the palliative *** primary endpoints were overall survival(OS)and cancer-specific survival(CSS).Results:The number and maximum size of HCC did not differ between the rese.tion and palliative groups after matching[1(range,1-5)vs.1(range,1-6),P=0.11 and 5.5(range,1.2-20.6)vs.6.0(range,1.0-20.5)cm,P=0.24,respectively].Tumor markers,including alpha-fetoprotein(AFP)and protein induced by vitamin K abse.ce or antagonist-II(PIVKA-II),also did not differ between the groups(P=0.29 and P=0.36,respectively).The 5-year OS and CSS rates of the rese.tion and palliative groups were 44.8%and 17.4%(P<0.001)and 47.7%and 18.6%(P<0.001),*** analysis showed that palliative treatment intent was the most significant risk factor for OS and CSS[odds ratio(OR

关键词： Hepatocellular carcinoma(HCC) portal vein invasion(PVI) overall survival(OS) cancer-specific survival(CSS) surgical rese.tion

Depolarization mitigated in ferroelectric Hf_(0.5)Zr_(0.5)O_(2)ultrathin films(<5 nm)on Si substrate by interface engineering

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Journal of Advanced Ceramics 2024年第3期13卷 282-292页

作者： se.Hyun Kim Younghwan Lee Dong Hyun Lee Geun Hyeong park Hyun Woo Jeong Kun Yang Yong Hyeon Cho Young Yong Kim Min Hyuk park Department of Materials Science and Engineering College of EngineeringSeoul National UniversitySeoul 08826Republic of Korea Rese.rch Institute of Advanced Materials College of EngineeringSeoul National UniversitySeoul 08826Republic of Korea Inter-university se.iconductor Rese.rch Center College of EngineeringSeoul National UniversitySeoul 08826Republic of Korea Pohang Accelerator Laboratory Pohang University of Science&TechnologyPohang 790784Republic of Korea

(Hf,Zr)O_(2)offers considerable potential for next-generation se.iconductor devices owing to its nonvolatile spontaneous polarization at the ***,scaling this material to sub-5 nm thickness pose. se.eral challenges,including the formation of an interfacial layer and high trap *** particular,a low-k SiO_(2)interfacial layer is naturally formed when(Hf,Zr)O_(2)films are directly grown on a Si substrate,leading to high depolarization fields and rapid reduction of the remanent *** address these.issues,we conducted a study to significantly improve ferroelectricity and switching endurance of(Hf,Zr)O_(2)films with sub-5 nm thicknesse. by inse.ting a TiO_(2)interfacial *** deposition of a Ti film prior to Hf_(0.5)Zr_(0.5)O_(2)film deposition resulted in a high-k TiO_(2)interfacial layer and prevented the direct contact of Hf_(0.5)Zr_(0.5)O_(2)with *** findings show that the high-k TiO_(2)interfacial layer can reduce the SiO_(2)/Si interface trap density and the depolarization field,resulting in a switchable polarization of 60.2μC/cm^(2)for a 5 nm thick Hf_(0.5)Zr_(0.5)O_(2)***,we propose.that inse.ting a high-k TiO_(2)interfacial layer between the Hf_(0.5)Zr_(0.5)O_(2)film and the Si substrate may offer a promising solution to enhancing the ferroelectricity and reliability of(Hf,Zr)O_(2)grown on the Si substrate and can pave the way for next-generation se.iconductor devices with improved performance.

关键词： ferroelectric charge trapping hafnia depolarization