visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2016-01-26 14:00 
연사  
장소 E6-2, #1323 

Electrochemistry on Nano- and Atomic Levels: Scanning Probe Microscopy Meets Deep Data

 

Jan. 26 (Tue), 2PM,  E6-2. #1323
Dr. Sergei V. Kalinin,  Center for Nanophase Materials Sciences, Oak Ridge National Laboratory

 

Structural and electronic properties of oxide surfaces control their physical functionalities and electrocatalytic activity, and are currently of interest for energy generation and storage applications. In this presentation, I will discuss several examples of high-resolution studies of the electronic and electrochemical properties of oxide surfaces enabled by multidimensional scanning probe microscopies. On the mesoscopic scale, combination of strain- and current sensitive scanning probe microscopies allows to build nanometer-scale maps of local reversible and irreversible electrochemical activities. The use of multivariate statistical methods allows separating the complex multidimensional data sets into statistically significant components which in certain cases can be mapped onto individual physical mechanisms. I will further discuss the use of in-situ Pulsed Laser Deposition growth combined with atomic resolution Scanning Tunneling Microscopy and Spectroscopy to explore surface structures and electrochemical reactivity of oxides on the atomic scale. For SrRuO3, we directly observe multiple surface reconstructions and link these to the metal-insulator transitions as ascertained by UPS methods. On LaxCa1-xMnO3, we demonstrate strong termination dependence of electronic properties and presence of disordered oxygen ad-atoms. The growth dynamics and surface terminations of these films are discussed, along with single-atom electrochemistry experiments performed by STM. Finally, I explore the opportunities for atomically-resolved imaging and property data mining of functional oxides extending beyond classical order parameter descriptions, and giving rise to the deep data analysis in materials research. 
This research is supported by the by the U.S. Department of Energy, Basic Energy Sciences, Materials Sciences and Engineering Division, and was conducted at the Center for Nanophase Materials Sciences, which is sponsored at Oak Ridge National Laboratory by the Scientific User Facilities Division, BES DOE.

 

Contact: Chan-Ho Yang, Physics Dept., (chyang@kaist.ac.kr)

번호 날짜 연사 제목
공지 2025-02-24 16:00    2025년 봄학기 콜로키움 안내
공지 2025-02-27 16:00    2025년 봄 물리학과 특별세미나 (광학/응집물리 분야)
474 2023-06-15 16:00    [CAPP Seminar] Cryogenic electronics for ion traps file
473 2023-06-14 16:00    [CAPP seminar] EMC at CERN file
472 2023-06-14 16:00    [High-Energy Theory Seminar]Vertex algebras and extended operators in 4d N=2 SCFTs
471 2023-06-08 16:00    Thermal decoupling in high-Tc cuprate superconductors
470 2023-06-01 16:00    (광학분야 세미나)Quantum sensing using a squeezed light from hot Rb vapor
469 2023-06-01 16:00    Hall viscosity and topological phenomena
468 2023-05-31 16:00    [High-Energy Theory Seminar] Resurgence and complex Chern-Simons theory
467 2023-05-26 11:00    (응집물리 세미나)Spectral Analyses of Stochastic Charge Trapping in Oxide Heterostructures file
466 2023-05-22 13:00    Design & Development of Electrochemical Biosensors for the Detection of T2DM Biomarkers
465 2023-05-19 11:00    (응집물리 세미나)Dipole condensations in Tilted Bose-Hubbard Chains
464 2023-05-18 16:00    (광학분야 세미나)Dielectric metasurfaces for optimized optical system and spatial light modulators
463 2023-05-17 16:30    Detecting Hidden Photon Dark Matter via the Excitation of Qubits file
462 2023-05-17 14:00    Optical Response in the multilayer thin films
461 2023-05-15 16:00    Role of dark Higgs boson in DM physics and cosmology file
460 2023-05-12 11:00    (응집물리 세미나)Interlayer conductivity and plasmon in weakly coupled layered systems
459 2023-05-03 16:00    Probing microscopic origins of axions by the chiral magnetic effect
458 2023-04-28 11:00    Tkachenko wave: From the modern field theory viewpoint
457 2023-04-27 16:00    (광학분야 세미나)On-chip spectrometers based on CMOS image sensors
456 2023-04-27 11:00    Inverse Shapiro steps and coherent quantum phase slip in superconducting nanowires
455 2023-04-14 12:00    (응집물리 세미나)Exotic quantum phenomena in two-dimensional materials file