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Direct vapor phase growth process and robust photoluminescence properties of large area MoS2 layers

Nano Research 2014年第12期7卷 1759-1768页

作者： V. Senthilkumar Le C. Tam Yong Soo Kim Yumin Sim Maeng-je Seong Joon. I. Jang Department of Physics and Energy Harvest Storage Research Center (EHSRC) University ofUIsan Ulsan 680-749 South Korea Department of Physics Applied Physics and Astronomy Binghamton University New York 13902 USA Department of Physics Chung-Ang University Seoul 156-756 South Korea

There has been growing research interest in the use of molybdenum disulfide in the fields of optoelectronics and energy harvesting devices, by virtue of its indirect-to-direct band gap tunability. However, obtaining large area thin films of MoS2 for future device applications still remains a challenge. In the present study, the amounts of the precursors （S and Moo3） were varied systematically in order to optimize the growth of highly crystalline and large area MoS2 layers by the chemical vapor deposition method. Careful control of the amounts of precursors was found to the key factor in the synthesis of large area highly crystalline flakes. The thickness of the layers was confirmed by Raman spectroscopy and atomic force microscopy. The optical properties and chemical composition were studied by photoluminescence （PL） and X-ray photoelectron spectroscopy. The emergence of strong direct excitonic emissions at 1.82 eV （A-exciton, with a normalized PL intensity of -55 × 10^3） and 1.98 eV （B-exciton, with a normalized PL intensity of -5 × 10^3） of the sample at room temperature clearly indicates the high luminescence quantum efficiency. The mobility of the films was found to be 0.09 cm^2/（V.s） at room temperature. This study provides a method for the controlled synthesis of high-quality two-dimensional （2D） transition metal dichalcogenide materials, useful for applications in nanodevices, optoelectronics and solar energv conversion.

关键词： molybdenum disulfide CVD growth large area Raman photo-luminescence field-effect ransistor (FET)

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深水钻井隔水管横向振动振型分析

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化工自动化及仪表 2024年第3期51卷 456-461,515页

作者：韩春杰姜继帅袁建马文倩荆国林东北石油大学物理与电子工程学院东北石油大学化学化工学院山东华宇工学院

为了分析深水钻井隔水管的横向振动固有频率和振型,综合考虑深水隔水管受到的顶部张紧力、海洋环境载荷、钻井平台漂移等作用力,借助微元法建立受力分析模型。根据连续梁理论和隔水管单元的动力学微分方程,确定其无阻尼自然振动基本方程... 详细信息

为了分析深水钻井隔水管的横向振动固有频率和振型,综合考虑深水隔水管受到的顶部张紧力、海洋环境载荷、钻井平台漂移等作用力,借助微元法建立受力分析模型。根据连续梁理论和隔水管单元的动力学微分方程,确定其无阻尼自然振动基本方程,并进一步剖析建立隔水管横向振动固有频率微分方程和模态振型基本方程,然后进行数值求解。使用控制变量法逐步分析隔水管长度、张力比、自身材质对隔水管固有频率的影响和变化规律。通过MATLAB软件表现出不同阶数的振动振型,结果表明:控制张力比、合理选择隔水管类型能够有效提高固有频率,避免与波流力形成共振,进而保证深水钻井作业安全。此外,隔水管的振型并不是标准正弦曲线,振型会受时间的影响不断变化。

关键词：模态振型深水钻井隔水管力学分析固有频率控制变量法 MATLAB

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Ternary layered double hydroxide oxygen evolution reaction electrocatalyst for anion exchange membrane alkaline seawater electrolysis

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Journal of Energy Chemistry 2022年第12期75卷 127-134,I0004页

作者： Yoo Sei Park Jae-Yeop jeong Myeong je Jang Chae-Yeon Kwon Geul Han Kim Jaehoon jeong Ji-hoon Lee Jooyoung Lee Sung Mook Choi Department of Hydrogen Energy Materials Surface&Nano Materials DivisionKorea Institute of Materials Science(KIMS)Changwon 51508Republic of Korea Department of Advanced Material Engineering Chungbuk National University1 Chungdae-roSeowon-guCheongjuChungbuk 28644Republic of Korea Department of Chemical Engineering University of WaterlooWaterlooOntario N2L 3G1 Canada School of Materials Science and Engineering Gyeongsang National UniversityJinju 52828Republic of Korea Department of Materials Science and Engineering Pusan National UniversityBusan 46241Republic of Korea Energy Industry Support Center Daegu Mechatronics&Materials InstituteDaegu 42704Republic of Korea Advanced Materials Engineering University of Science and Technology(UST)Yuseong-guDaejeon 34113Republic of Korea

Anion exchange membrane(AEM)water electrolyzers are promising energy devices for the production of clean hydrogen from ***,the lack of active and robust electrocatalysts for the oxygen evolution reaction(oER)severely impedes the development of this *** this study,a ternary layered double hydroxide(LDH)oER electrocatalyst(NiFeCo-LDH)is developed for high-performance AEM alkaline seawater *** AEM alkaline seawater electrolyzer catalyzed by the NiFeCo LDH shows high seawater electrolysis performance(0.84 A/cm^(2)at 1.7 Vcell)and high hydrogen production efficiency(77.6%at 0.5 A/cm^(2)),thus outperforming an electrolyzer catalyzed by a benchmark Iro_(2)*** NiFeCo-LDH electrocatalyst greatly improves the kinetics of the AEM alkaline seawater electrolyzer,consequently reducing its activation loss and leading to high *** on the results,this NiFeCo-LDH-catalyzed AEM alkaline seawater electrolyzer can likely surpass the energy conversion targets of the US Department of Energy.

关键词： Anion exchange membranes water electrolysis oxygen evolution reactions Alkaline seawater electrolysis Hydrogen production

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岩石土工特性指数在地下开挖工程中的应用

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矿业译丛 1990年第3期 4-9页

作者： o‘Ro.,je 毛光宁

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Repair of a giant inguinoscrotal hernia with herniation of the ileum and sigmoid colon:A case report

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World Journal of Clinical Cases 2023年第2期11卷 401-407页

作者： Shih-Hung Liu Ching-Hen Yen Hsu-Ping Tseng je-Ming Hu Ching-Han Chang Ta-Wei Pu Department of Surgery Tri-Service General HospitalNational Defense Medical CenterTaipei 11490Taiwan Division of Urological Surgery Department of SurgerySongshan BranchTri-Service General HospitalNational Defense Medical CenterTaipei 10581Taiwan Division of Colon and Rectal Surgery Department of SurgeryTri-Service General HospitalNational Defense Medical CenterTaipei 11490Taiwan Department of Surgery Kaohsiung Armed Forces General HospitalKaohsiung 802Taiwan Division of Colon and Rectal Surgery Department of SurgerySongshan BranchTri-Service General HospitalNational Defense Medical CenterTaipei 10581Taiwan

BACKGRoUND Giant inguinoscrotal hernias are huge inguinal hernias that extend below the midpoint of the inner thigh in the standing *** inguinoscrotal hernias are rare in developed countries because of their better medical resources and early ***,they can develop in patients who refuse surgery or ignore their *** is inevitable because strangulation and organ perforation can occur,leading to peritonitis and *** surgical approaches include open abdominal and inguinal approaches or a combination of *** SUMMARY We present the case of a 73-year-old man who visited our emergency department with a huge mass in his left scrotum and septic *** computed tomography revealed a large left inguinoscrotal hernia that contained small bowel loops and the *** surgical intervention was performed immediately because intestinal strangulation was highly *** operative repair was performed using a combination of mini-exploratory laparotomy and the inguinal *** incarcerated organs,which included the ileum and sigmoid colon,had relatively good intestinal perfusion without perforation or ischemic *** were successfully reduced into the abdomen,and bowel resection was not necessary.A tension-free prosthetic mesh was used for the hernia *** weeks after the initial surgery,and with adequate antimicrobial therapy,the patient recovered and was discharged from our *** evidence of hernia relapse was noted during the outpatient follow-up examination 3 mo after *** Emergency surgery involving combined mini-exploratory laparotomy and the inguinal approach should be performed for serious incarcerated giant inguinoscrotal hernias.

关键词： Inguinal hernia Ileum Sigmoid colon Sepsis Hernia repair Case report

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Risk factors predict microscopic extranodal tumor deposits in advanced stage Ⅲ colon cancer patients

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World Journal of Gastroenterology 2023年第11期29卷 1735-1744页

作者： Yi-Han Jhuang Yu-Ching Chou Yu-Chun Lin je-Ming Hu Ta-Wei Pu Chao-Yang Chen Division of Cardiovascular Surgery Tri-Service General HospitalNational Defense Medical CenterTaipei 114TaiwanChina School of Public Health National Defense Medical CenterTaipei 114TaiwanChina Department of Pathology Tri-Service General HospitalNational Defense Medical CenterTaipei 114TaiwanChina Division of Colorectal Surgery Tri-Service General HospitalNational Defense Medical CenterTaipei 114TaiwanChina Division of Colorectal Surgery Tri-Service General Hospital Song-shan BranchNational Defense Medical CenterTaipei 114TaiwanChina

BACKGRoUND Colorectal cancer is a frequent cause of cancer-related mortality in patients with lymph node or distant *** tumor deposits(TDs)are considered prognostically distinct from lymph node *** To investigate risk factors for extranodal TDs in stage III colon *** This was a retrospective cohort *** selected 155 individuals diagnosed with stage III colon cancer from the database of the Cancer Registry of the Tri-Service General *** patients were allocated into the groups with/without *** Cox regression analysis and Kaplan-Meier method were *** primary outcomes investigate the association between the covariates and extranodal TDs,and prognostic significance of the covariates regarding the *** There were 136 individuals in the non-N1c group and 19 individuals in the N1c *** with lymphovascular invasion(LVI)had a higher risk of *** survival rates of patients with and without LVI were 6.64 years and 8.61 years,respectively(P=0.027).The N1c patients without LVI had higher overall survival than those who with LVI(7.73 years vs 4.42 years,P=0.010).CoNCLUSIoN Patients having stage III colon cancer with LVI have a higher probability of having TDs than those with stage III colon cancer without *** III colon cancer patients with TDs and LVI could have poor prognosis and outcome.

关键词： Colon cancer Tumor deposits Lymphovascular invasion Risk factor

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Synchrotron refractive-index microradiography of human liver cancer tissue

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Chinese Science Bulletin 2005年第22期50卷 2657-2661页

作者： ToNG Yongpeng ZHANG Guilin LI Yan HWU Yeukuang TSAI Wenli je Jung Ho Margaritondo G YUAN Dong Shanghai Institute of Applied Physics Chinese Academy of Sciences Shanghai 201800 China Institute of Physics Academia Sinica Nankang Taipei China Department of Material Science and Engineering Pohang Universty of Science and Technology Pohang Korea IPA-Ecole Polytechnique Federale de Lausanne (EPFL) CH-1015 Lausanne Switzerland Shanghai CDC Shanghai 200336 China

Three human liver tissue samples (～5 mm × 40 mm × 20 mm) were excised from a cancer patient's liver during surgery. The microradiology analysis was performed with a non-standard approach on a synchrotron. High-resolution refractive-index edge-enhanced microradiographs that cover a larger volume of the liver tissue sample were obtained. The cancer tissue and normal tissue could be clearly identified and distinguished based on their different textures. Furthermore, new blood vessel hyperplasia was found near the cancer area. Blood vessels with a diameter smaller than 20 μm could be identified. These findings were fully consistent with the histopathological examination of the same area. Microradiographs of the newly formed blood vessels at different angles were also obtained. This result shows that it is possible to further develop this approach into a technique of microradiographic imaging for clinic diagnosis of liver cancer at the early stage.

关键词：肝癌同步加速器折射系数 X射线显微照相术组织病理学

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Biliary reflux detection in anomalous union of the pancreaticobiliary duct patients

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World Journal of Gastroenterology 2012年第9期18卷 952-959页

作者： Suk Keu Yeom Seung Wha Lee Sang Hoon Cha Hwan Hoon Chung Bo Kyung je Baek Hyun Kim Jong Jin Hyun Department of Radiology Korea University Ansan Hospital Division of Gastroenterology and Hepatology Department of Internal MedicineKorea University Ansan HospitalGyeonggi-do 425-707South Korea

AIM： To demonstrate the imaging findings of biliopan creatic and pancreatico-biliary reflux in patients with anomalous union of the pancreatico biliary duct （AUPBD） on gadoxetic acidenhanced functional magnetic res... 详细信息

关键词： Bile reflux Choledochal cyst Encoscopicretrograde cholangio-pancreatography Gadolinium-eth-oxybenzyl-diethylenetriamine penta-acetic acid Magneticresonance imaging

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基于阿贝尔黑格斯变量的杨-米尔斯理论的红外阿贝尔化BES合作组(英文)

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高能物理与核物理 2006年第3期30卷 196-200页

作者：贾多杰西北师范大学物电学院理论物理研究所

通过SU(2)规范场的法捷耶夫-Niemi分解给出了有效阿贝尔-黑格斯型作用量的一个计算方法．具体指出了该分解中所用的自然规范固定以及阿贝尔投射与杨-米尔斯理论的红外动力学之间的内在关系．推导出了色电场的一个伦敦型方程．

关键词：杨-米尔斯场分解阿贝尔化伦敦型方程

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Deflection angle switching with a metasurface based on phase-change nanorods [Invited]

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Chinese optics Letters 2018年第5期16卷 38-41页

作者： Chulsoo Choi Sun-je Kim jeong-Geun Yun Jangwoon Sung Seung-Yeol Lee Byoungho Lee School of Electrical and Computer Engineering and Inter-University Semiconductor Research Center Seoul National University Gwanak-Gu Gwanakro 1 Seoul 08826 South Korea School of Electronics Engineering Kyungpook National University Daegu 41566 South Korea

We propose the active metasurface using phase-change material Ge2Sb2Te5（GST）, which has two distinct phases so called amorphous and crystalline phases, for an ultrathin light path switching device. By arranging multiple anisotropic GST nanorods, the gradient metasurface, which has opposite directions of phase gradients at the two distinct phases of GST, is demonstrated theoretically and numerically. As a result, in the case of normal incidence of circularly polarized light at the wavelength of 1650 nm, the cross-polarized light deflects to-55.6° at the amorphous phase and ＋55.6° at the crystalline phase with the signal-to-noise ratio above 10 dB.

关键词： Deflection angle switching with a metasurface based on phase-change nanorods GST

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