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一氧化碳合成金刚石薄膜的形貌和结构分析

物理学报 2007年第11期56卷 6572-6579页

作者：刘燕燕 E.bauer-grosse 张庆瑜大连理工大学三束材料改性国家重点实验室 Laboratoire de Science et G nie des Surfaces Ecole des MinesNancy 54042France

利用微波等离子体化学气相沉积(MPCVD)技术,采用偏压增加成核(BEN)、两步生长的方法在一氧化碳(CO)和氢气(H2)的环境下制备了金刚石薄膜.利用扫描电子显微镜(SEM)、Raman光谱仪和透射电子显微镜(TEM)对金刚石薄膜的形貌和结构进行了分析... 详细信息

利用微波等离子体化学气相沉积(MPCVD)技术,采用偏压增加成核(BEN)、两步生长的方法在一氧化碳(CO)和氢气(H2)的环境下制备了金刚石薄膜.利用扫描电子显微镜(SEM)、Raman光谱仪和透射电子显微镜(TEM)对金刚石薄膜的形貌和结构进行了分析.研究发现金刚石晶粒在第一步成核及生长的过程中产生了层错和孪晶,而在第二步的生长过程中产生的层错和孪晶很少,最终形成的金刚石晶粒外表面比较光滑,包含有近五次对称或者平行的片状的孪晶,并可以观察到少量的位错.而在样品的边缘由于等离子体的不均匀产生了比样品中心成核密度低的区域.在这个区域中,发现了一个新的非金刚石的碳结构.

关键词：金刚石薄膜 Raman光谱透射电子显微镜结构

微波等离子体化学气相沉积合成掺氮金刚石薄膜的缺陷和结构特征及其生长行为

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物理学报 2007年第4期56卷 2359-2368页

作者：刘燕燕 E.bauer-grosse 张庆瑜大连理工大学三束材料改性国家重点实验室 Laboratoire de Science et Génie des Surfaces Ecole des MinesNancy 54042France

采用微波等离子体化学气相沉积(MPCVD)技术,在甲烷和氢气的混合气体中,通过掺入微量氮气的方法,合成了掺氮金刚石薄膜.利用扫描电子显微镜、拉曼光谱和透射电子显微镜对薄膜的形貌和结构进行了表征.研究结果表明:处于基片中心位置的薄... 详细信息

采用微波等离子体化学气相沉积(MPCVD)技术,在甲烷和氢气的混合气体中,通过掺入微量氮气的方法,合成了掺氮金刚石薄膜.利用扫描电子显微镜、拉曼光谱和透射电子显微镜对薄膜的形貌和结构进行了表征.研究结果表明:处于基片中心位置的薄膜具有比较高的成核密度,成核密度高达4.8×108cm-2,并且具有〈001〉的择优取向,晶粒呈立方金刚石特征,但沿{111}晶面生长时存在大量层错.处于基片边缘的薄膜成核密度较低,晶粒为6H型多型金刚石结构,而且多型金刚石的出现,导致金刚石孪晶关系的变化.此外,根据薄膜的生长速率,探讨了MPCVD过程中掺氮对薄膜生长行为的影响.

关键词：金刚石结构表征透射电子显微镜多型金刚石

REACTION PROBABILITIES OF ENERGETIC SPECIES AT GROWING DIAMOND FILM SURFACES BY MOLECULAR DYNAMICS SIMULATION

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Acta Metallurgica Sinica(English Letters) 2002年第1期15卷 131-135页

作者： Q.Y. Zhang E. bauer- grosse State Key Laboratory for Materials Modification by Laser Ion and Electron Beams Dalian University of Technology Dalian 116024 China Surface Science and Engineering Laboratory Ecole des Mines de Nancy Parc de Saurupt 54042 Nancy Cedex France

A Molecular Dynamics (MD) simulation with Tersoff empirical many-bodypotential has been employed to investigate the growth processes of diamond film with energeticspecies deposition. In the present study, we have studied the reaction probabilities of energeticspecies with energies of 0.1 e V to 10eV at the substrate temperature of 1100K. In the cases of thediamond growth on the surface with H passivation, the reaction probability of hydrocarbon speciesconsiderably increases when the species energy is higher than 2eV. This means that the diamond filmcan grow in the case of high incident species energy without the process of hydrogen abstraction,which is needed in the case of incident species with low energy. The reaction mechanism of energeticspecies on hydrogen passivated diamond surface is also discussed.

关键词： molecular dynamics simulation diamond film growth reaction probability

Comparative Study of Serologic Results Obtained by HI Test of Avian Influenza and Newcastle Disease Performed in Four Mexican Laboratories

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Journal of Agricultural Science and Technology(A) 2017年第2期7卷 135-142页

作者： Alberto Guadarrama Daniel Marrufo Eduardo Lucio Lucia elizabeth Cruz Birds Technical Department lnvestigacion Aplicada S.A. de C. V. Tehuacan 75700 Puebla Mexico Regulatory Affairs Department Sanfer--lnvestigacion Aplicada S.A. de C. V. Mexico City 01040 Mexico

In the poultry industry, it is common to evaluate the humoral immune response associated to the vaccination calendar used for the different zootechnical purposes. When the vaccine against avian influenza and Newcastle disease currently used in a farm is going to be changed, an important parameter observed to choose a product over the others is based on the antibody titers reached by the application of the new vaccine. This study aimed to compare the serologic results obtained by hemagglutination inhibition （HI） test of avian influenza and Newcastle disease reported in four different national laboratories. One-day-old Ross broiler chickens were kept in Horsfall-bauer isolation units and were vaccinated subcutaneously for the prevention of avian influenza and Newcastle disease. Then, serum of all the birds was extracted at three, six and seven weeks old and sent to four different national diagnostic laboratories, where HI test was performed for avian influenza and Newcastle disease. The treatments were designed in 4 × 3 factorial. Data showed significant statistical differences between laboratory results （up to six logarithms for influenza at six and seven weeks）. This study confirms that the results of the HI test can vary from one laboratory to another, thus it is important to consider this, when the vaccines against avian influenza and Newcastle disease are evaluated at field.

关键词： Avian influenza Newcastle disease serology hemagglutination inhibition test.

Analysis of the Antimicrobial Properties of Thanaka, a Burmese Powder Used to Treat Acne

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Journal of Biosciences and Medicines 2017年第7期5卷 1-6页

作者： elizabeth V. Seiverling Jordan P. Trubiano Jacqueline C. Williams Hadjh T. Ahrns David W. Craft Matthew R. England Departments of Dermatology Family and Community Medicine and Pathology Pennsylvania State University - Milton S. Hershey Medical Center Hershey PA USA

Thanaka, powder from Hesperethusa crenulata tree bark, has been used in Burmese culture for acne treatment and prevention for over 2000 years. The purpose of this study was to evaluate the antimicrobial properties of thanaka against Staphylococcus aureus, Escherichia coli, and Propionibacterium acnes. Kirby-bauer disk diffusion revealed no zones of inhibition for thanaka against the tested microorganisms. Disk diffusion may not be the best modality for definitive analysis of the antimicrobial activity of thanaka. Furthermore, the utility of thanaka in acne treatment may be related to anti-inflammatory, rather than antimicrobial properties.

关键词： Thanaka Myanmar Disk Diffusion Propionibacterium acnes

Performance and calibration of quark/gluon-jet taggers using 140 fb^(-1) of pp collisions at √s=13 TeV with the ATLAS detector

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Chinese Physics C 2024年第2期48卷 1-25页

作者： G. Aad B. Abbott K. Abeling N.J. Abicht S.H. Abidi A. Aboulhorma H. Abramowicz H. Abreu Y. Abulaiti B.S. Acharya C. Adam Bourdarios L. Adamczyk S.V. Addepalli M.J. Addison J. Adelman A. Adiguzel T. Adye A.A. Affolder Y. Afik M.N. Agaras J. Agarwala A. Aggarwal C. Agheorghiesei A. Ahmad F. Ahmadov W.S. Ahmed S. Ahuja X. Ai G. Aielli A. Aikot M. Ait Tamlihat B. Aitbenchikh I. Aizenberg M. Akbiyik T.P.A. Åkesson A.V. Akimov D. Akiyama N.N. Akolkar K. Al Khoury G.L. Alberghi J. Albert P. Albicocco G.L. Albouy S. Alderweireldt M. Aleksa I.N. Aleksandrov C. Alexa T. Alexopoulos F. Alfonsi M. Algren M. Alhroob B. Ali H.M.J. Ali S. Ali S.W. Alibocus M. Aliev G. Alimonti W. Alkakhi C. Allaire B.M.M. Allbrooke J.F. Allen C.A. Allendes Flores P.P. Allport A. Aloisio F. Alonso C. Alpigiani M. Alvarez Estevez A. Alvarez Fernandez M. Alves Cardoso M.G. Alviggi M. Aly Y. Amaral Coutinho A. Ambler C. Amelung M. Amerl C.G. Ames D. Amidei S.P. Amor Dos Santos K.R. Amos V. Ananiev C. Anastopoulos T. Andeen J.K. Anders S.Y. Andrean A. Andreazza S. Angelidakis A. Angerami A.V. Anisenkov A. Annovi C. Antel M.T. Anthony E. Antipov M. Antonelli F. Anulli M. Aoki T. Aoki J.A. Aparisi Pozo M.A. Aparo L. Aperio Bella C. Appelt A. Apyan N. Aranzabal S.J. Arbiol Val C. Arcangeletti A.T.H. Arce E. Arena J-F. Arguin S. Argyropoulos J.-H. Arling O. Arnaez H. Arnold G. Artoni H. Asada K. Asai S. Asai N.A. Asbah J. Assahsah K. Assamagan R. Astalos S. Atashi R.J. Atkin M. Atkinson H. Atmani P.A. Atmasiddha K. Augsten S. Auricchio A.D. Auriol V.A. Austrup G. Avolio K. Axiotis G. Azuelos D. Babal H. Bachacou K. Bachas A. Bachiu F. Backman A. Badea P. Bagnaia M. Bahmani A.J. Bailey V.R. Bailey J.T. Baines L. Baines O.K. Baker E. Bakos D. Bakshi Gupta V. Balakrishnan R. Balasubramanian E.M. Baldin P. Balek E. Ballabene F. Balli L.M. Baltes W.K. Balunas J. Balz E. Banas M. Bandieramonte A. Bandyopadhyay S. Bansal L. Barak M. Barakat E.L. Barberio D. Barberis M. Barbero M.Z. Barel K.N. Barends T. Barillari M-S. Barisits T. Barklow P. Baron D.A. Baron Mo The ATLAS Collaboration

The identification of jets originating from quarks and gluons,often referred to as quark/gluon tagging,plays an important role in various analyses performed at the Large Hadron Collider,as Standard Model measurements and searches for new particles decaying to quarks often rely on suppressing a large gluon-induced *** paper describes the measurement of the efficiencies of quark/gluon taggers developed within the ATLAS Collaboration,using √s=13 TeV proton–proton collision data with an integrated luminosity of 140 fb^(-1) collected by the ATLAS *** taggers with high performances in rejecting jets from gluon over jets from quarks are studied:one tagger is based on requirements on the number of inner-detector tracks associated with the jet,and the other combines several jet substructure observables using a boosted decision tree.A method is established to determine the quark/gluon fraction in data,by using quark/gluon-enriched subsamples defined by the jet *** in tagging efficiency between data and simulation are provided for jets with transverse momentum between 500 GeV and 2 TeV and for multiple tagger working points.

关键词： ATLAS JET QUARK GLUON TAGGING