9月26日 緱慧陽教授學術報告(江蘇圣理工學院-中俄學院)

作者:時間:2019-09-24瀏覽:10設置

報告人:緱慧陽

報告題目:AdvancingMaterials Functionalities Aided by Pressure: from Hard Materials to Electrides

報告時間:2019年09月26日(周四)上午 9:30

報告地點:物理與電子工程學院4樓學術報告廳

主辦單位:江蘇圣理工學院-中俄學院、物理與電子工程學院、科學技術研究院

報告人簡介:

    RESEARCHINTERESTS

Synthesis andcharacterizations of novel functional materials with unexpected properties

Employing computational tools to predict structural and physicalproperties of solids, which are difficult to study experimentally

RESEARCH EXPERIENCE

Oct. 2015- StaffScientist

Centerfor High Pressure Science and Technology Advanced Research (HPSTAR), Beijing,China Sept. 2013- Oct. 2015 Postdoc Associate

GeophysicalLaboratory Carnegie Institution of Washington, USA Aug.2011-Aug. 2013 Alexander von Humboldt Postdoc fellowship Bayerisches Geoinstitut, Universitaet Bayreuth, Germany

Nov. 2009-May 2011 Postdoc Associate

Department ofMechanical, Aerospace, and Nuclear Engineering, Rensselaer Polytechnic Institute Sept.2005-Nov. 2009 PH.D.

StateKey Laboratory of Metastable Materials Science and Technology and College ofMaterial Science and Engineering, Yanshan University

Sept. 2002-Jul.2005 Master.

StateKey Laboratory of Metastable Materials Science and Technology, School ofMaterials Science and Engineering, Yanshan University

Sept. 1996-Jul.2000 Undergraduate student.

Schoolof Materials Science and Engineering, Yanshan University HONORS & AWARDS(since Ph.D.)

  1. China 1000 talents Plan for Youth, 2016

  2. Alexander von Humboldt Postdoc fellowship, 2011-2013

  3. Excellent Ph.D. dissertation of Hebei province, China, 2010

  4. Excellent Ph.D. dissertation of Yanshan University, 2009

  5. Excellent Ph.D. Student Scholarship of Yanshan University,2008

報告摘要:

    Materials are critical for the potentially technological applicationsand innovations. It is now well-accepted that high pressure is an effective means to discover/modify materials with exciting chemical and physical properties.Here I will present the first high-quality HAADF-STEM imaging for boron-rich molybdenum borides byemploying the spherical aberration TEM. We obtain a highly precise local composition and atomic determinations in both Mo and boronatoms. We have successful synthesis of large-sized single-crystal molybdenumtri-boride underpressure and determined its structure, which unravels Mo atoms withpartial occupancy. Thefunctionalites of the mechanical properties andsuperconductivity are also evaluated for the first time [1]. Furthermore, we have employed synchrotron X-ray diffraction, electrical resistance measurementscombined with theoretical calculations to probe the structural and electrical response of electrides (Ca2Nand Y2C) under high pressures. We found the pressure-inducedmetal-to-semiconductorswitching in Ca2N, together with the reductions of electronicdimensionality from 2D, 1D to0D.For comparison, the pressure response of Y2C with the sameconfiguration is also discussed [2]. Our resultsdemonstrate a feasible strategy foreffective tuning the functionalities of materials underpressure.


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