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Silicene nanoribbons on transition metal dichalcogenide substrates： Effects on electronic structure and ballistic transport

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Nano Research 2016年第11期9卷 3394-3406页

作者： Bas van den broek Michel Houssa Augustin Lu Geoffrey Pourtois Valery Afanas'ev Andre Stesmans Semiconductor Physics Laboratory Department of Physics and Astronomy University of Leuven Celestijnenlaan 200 D B-3001 Leuven Belgium imec 75 Kapeldreef B-3001 Leuven Belgium Department of Chemistry Plasmant Research Group University of Antwerp B-2610 Wilrijk-Antwerp Belgium

The idea of stacking multiple monolayers of different two-dimensional materials has become a global pursuit. In this work a silicene armchair nanoribbon of width W and van der Waals-bonded to different transition-metal dichalcogenide （TMD） bilayer substrates MoX2 and WX2, where X = S, Se, Te is considered. The orbital resolved electronic structure and ballistic transport properties of these systems are simulated by employing van der Waals-corrected density functional theory and nonequilibrium Green＇s functions. We find that the lattice mismatch with the underlying substrate determines the electronic structure, correlated with the silicene buckling distortion and ultimately with the contact resistance of the two-terminal system. The smallest lattice mismatch, obtained with the MoTe2 substrate, results in the silicene ribbon properties coming close to those of a freestanding one. With the TMD bilayer acting as a dielectric layer, the electronic structure is tunable from a direct to an indirect semiconducting layer, and subsequently to a metallic electronic dispersion layer, with a moderate applied perpendicular electric field.

关键词： silicene transition metal dichalcogenides van der Waals heterostructure electronic structure ballistic transport

Vibrational properties of silicene and germanene

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Nano Research 2013年第1期6卷 19-28页

作者： Emilio Scalise Michel Houssa Geoffrey Pourtois B. van den broek Valery Afanas'ev andAndr Stesmans Semiconductor Physics Laboratory Department of Physics and Astronomy University of Leuven Celestijnenlaan 200 D B-3001 Leuven Belgium IMEC 75 Kapeldreef B-3001 Leuven Belgium Department of Chemistry PLASMANTresearch group University of Antwerp Universiteitsplein 1 B-2610 Wilrijk-Antwerp Belgium

The structural and vibrational properties of two-dimensional hexagonal silicon （silicene） and germanium （germanene） are investigated by means of first-principles calculations. It is predicted that the silicene （germanene） structure with a small buckling of 0.44 ,~ （0.7/k） and bond lengths of 2.28 ,~ （2.44 .~） is energetically the most favorable, and it does not exhibit imaginary phonon mode. The calculated non-resonance Raman spectra of silicene are characterized by a main peak at about 575 cm-1, namely the G-like peak. For germanene, the highest peak is at about 290 cm-1. Extensive calculations on armchair silicene nanoribbons and armchair germanene nanoribbons are also performed, with and without hydrogenation of the edges. The studies reveal other Raman peaks mainly distributed at lower frequencies than the G-like peak which could be attributed to the defects at the edges of the ribbons, thus not present in the Raman spectra of non-defective silicene and germanene. Particularly the Raman peak corresponding to the D mode is found to be located at around 515 cm-1 for silicene and 270 cm-1 for germanene. The calculated G-like and the D peaks are likely the fingerprints of the Raman spectra of the low-buckled structures of silicene and germanene.

关键词： silicene germanene vibrational properties Raman spectra 2D nanolattice first-principles calculation

Topological to trivial insulating phase transition in stanene

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Nano Research 2016年第3期9卷 774-778页

作者： Michel Houssa Bas van den broek Konstantina Iordanidou Anh Khoa Augustin Lu Geoffrey Pourtois Jean-Pierre Locquet Valery Afanas'ev Andre Stesmans Department of Physics and Astronomy University of Leuven Celestijnenlaan 200D B-3001 Leuven Belgium imec 75 Kapeldreef B-3001 Leuven Belgium

Electronic properties of stanene, the Sn counterpart of graphene are theoretically studied using first-principles simulations. The topological to trivial insulating phase transition induced by an out-of-plane electric field or by quantum confinement effects is predicted. The results highlight the potential to use stanene nanoribbons in gate-voltage controlled dissipationless spin-based devices and are used to set the minimal nanoribbon width for such devices, which is typically approximately 5 nm.

关键词： two-dimensional (2D)materials topological insulators density functional theory(DFT) simulations electronic structure

Fixation methods for electron microscopy of human and other liver

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World Journal of Gastroenterology 2010年第23期16卷 2851-2866页

作者： Eddie Wisse Filip Braet Hans Duimel Celien Vreuls Ger Koek Steven WM Olde Damink Maartje AJ van den broek Bart De Geest Cees HC Dejong Chise Tateno Peter Frederik Electron Microscope Unit University of Maastricht Australian Key Center for Microscopy and Microanalysis Sydney University Department of Internal Medicine University of Maastricht Department of Surgery University of Maastricht Center for Molecular and Vascular Biology University of Leuven PhoenixBio Co.

For an electron microscopic study of the liver,expertise and complicated,time-consuming processing of hepatic tissues and cells is *** interpretation of electron microscopy(EM) images requires knowledge of the liver fine structure and experience with the numerous artifacts in fixation,embedding,sectioning,contrast staining and microscopic ***,the aim of this paper is to present a detailed summary of different methods for the preparation of hepatic cells and tissue,for the purpose of preserving long-standing expertise and to encourage new investigators and clinicians to include EM studies of liver cells and tissue in their projects.

关键词： Liver Tissue fixation Perfusion Electron microscopy Biopsy

Exploring the Attractiveness of Companies Branding D&I to Potential Employees in Online Recruitment

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Psychology Research 2023年第11期13卷 542-576页

作者： YANG Ding Antonius van den broek University College London LondonUnited Kingdom Loughborough University London LondonUnited Kingdom

Concrete action on diversity and inclusion(D&I)is critical to companies’value creation and *** that intentionally fail to attract and retain a diverse talent pool will struggle to innovate,compete,and *** advantages of a diverse and inclusive workplace include the reduction of homogenous thinking and an increase in novel ideas and perspectives due to the wealth of talent from diverse *** studies have focused on the benefits of corporate D&I from a corporate perspective;however,there is scant research on the impact of corporate D&I from employees’***,this study,through an online questionnaire,proposes to examine the impact of employer brand D&I on potential employees in online recruitment channels from the perspective of potential *** study results indicate that most Chinese companies still exhibit low levels of D&I during *** study also included an empirical analysis of 267 valid samples,which showed that:(1)the D&I of employer brand perceptions positively impact job search intentions,behaviour,and decision making.(2)Companies’D&I has the most significant influence on job seekers’decision making,followed by behavioural influence and cognitive influence.(3)The type of job seeker plays a moderating role in the relationship between employer brand perception and job search intention,behaviour,and decision making.(4)Online recruitment’s increasing popularity amplifies employer branding’s *** on the findings,this study suggests how companies can use D&I branding strategies to attract quality talent and increase job seekers’job search intentions.

关键词： employer branding diversity and inclusion decision-making online recruitment

C反应蛋白在下呼吸道感染中的诊断价值:系统性综述

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英国医学杂志中文版 2005年第6期8卷 348-351页

作者： Victor van der Meer Arie Knuistingh Neven Peterhans J van den broek Willem J J Assendelft 徐莉莉 Leiden University Medical Center Albinusdreef 2PO Box 96002300 RC LeidenNetherlands Department of Medical Decision Making Department of General practiceand Nursing Home Medicine Department of Infectious Diseases

目的对于经放射学影像证实的肺炎，评价C反应蛋白的诊断准确性，及其在区分下呼吸道细菌感染和病毒感染方面的作用。资料来源 Medline和Embase（1966年1月至2004年4月）等医学文献数据库，核实了参考文献。研究的选择研究纳入了将C... 详细信息

目的对于经放射学影像证实的肺炎，评价C反应蛋白的诊断准确性，及其在区分下呼吸道细菌感染和病毒感染方面的作用。资料来源 Medline和Embase（1966年1月至2004年4月）等医学文献数据库，核实了参考文献。研究的选择研究纳入了将C反应蛋白与胸片或微生物学作为对照进行比较的文章。由两位作者独立评价研究方法。结果没有一项研究符合全部有效标准。有6项研究采用胸片浸润影作为对照检查，敏感性为10％～98％，特异性为44％～99％。在5项研究的亚组分析中，成人C反应蛋白和浸润影之间的关系显示曲线下面积为0．80（95％可信区间是0．75～0．85）。在12项研究中，进行了C反应蛋白和下呼吸道感染的细菌病原学的相关性研究，敏感性为8％～99％，特异性为27％～95％。由于这些数据在流行病学和统计学上存在异质性，因此不能计算出一个统一的结果。结论对于胸片浸润影与下呼吸道感染中的细菌病原体之间的关系，C反应蛋白检测既不能敏感地排除其相关性，也不能特异地确定其类型。这些诊断性研究的方法学质量普遍不高，所得证据不能持久和充分地支持广泛应用C反应蛋白作为一种快速检查来指导抗生素使用。

关键词：下呼吸道感染 C反应蛋白系统性综述诊断价值下呼吸道细菌感染医学文献数据库 Medline 对照检查诊断准确性曲线下面积

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眶前部平滑肌瘤可能是滑车平滑肌组织肿瘤

美国医学会眼科杂志（中文版） 2006年第4期18卷 244-244,243页

作者： Pieter Phillip van den broek Jan-Jieerd H.N.de Faber Mihe Kliffen Dion Paridacns 冯云（译）赵光喜（校）

一名35岁的女性患者在她的又眼长了一个巨大的结膜下隆起物。起先是在10个月前她怀孕期间就发现了明显的结膜血管。触诊可及一个坚硬的有弹性的肿物。眼底镜检查提示下中部有压迹。视力为20/20。超声图像检查显示在T1和T2加权相上均为... 详细信息

一名35岁的女性患者在她的又眼长了一个巨大的结膜下隆起物。起先是在10个月前她怀孕期间就发现了明显的结膜血管。触诊可及一个坚硬的有弹性的肿物。眼底镜检查提示下中部有压迹。视力为20/20。超声图像检查显示在T1和T2加权相上均为低强度到等强度信号的一个眶前部软组织团块（图2）。

关键词：平滑肌瘤肌组织肿瘤眼底镜检查女性患者怀孕期间 T2加权

悬臂式檐蓬营造开放特色——荷兰奈梅亨大学Grotius教学楼

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设计家 2015年第2期 54-57页

作者： Mels Crouwel Joost Vos Joost van Noort Okke van den broek Moon Brader Frank Deltrap Marcel Wassenaar Nico de Waard Cees Zuidervaart Amir Farokhian Jannes Linders

Grotiusge大楼是奈梅亨大学的新教学楼,主要为法学院建造。奈梅亨大学坐落于绿植环绕,如同公园般风景秀丽的地段。这栋布局紧凑、独立的教学楼面向四周,完美地融入绿色的校园。这座水平铰接式的教学楼占地面积很小,看起来仅有三层,事实... 详细信息

Grotiusge大楼是奈梅亨大学的新教学楼,主要为法学院建造。奈梅亨大学坐落于绿植环绕,如同公园般风景秀丽的地段。这栋布局紧凑、独立的教学楼面向四周,完美地融入绿色的校园。这座水平铰接式的教学楼占地面积很小,看起来仅有三层,事实上共有五层,地下有一层和顶层还有一层隐蔽的阁楼。汽车停车场和自行车库都位于地下层。主入口位于一个将要新建的广场区。通过主入口可以进入明亮的中庭。

关键词：奈梅亨 Grotius 悬臂式主入口地下层占地面积直射光全景图室内装饰倾泻而下

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有机酸在动物饲料中的应用

饲料广角 2001年第8期 21-23页

作者： Ir.G.vandenbroek 匡向东

导言抗生素生长促进剂、药物(口服)与有机酸的相似处是它们都能影响动物消化道内的菌群平衡.但是作用方式却不同.本文将就这一点进行阐述,并结合药物及抗生素生长促进剂的作用,进一步讨论有机酸的作用模式以及如何使用有机酸等问题.

关键词：动物饲料有机酸药物抗生素生长促进剂作用模式分类饲料添加剂