Intrinsic conduction mechanism in polymer nanofibers (15’ + 10’)

• Park Yung Woo (Seoul National University)

Room: Room 510

Atomic Electron Tomography: Probing 3D Structure and Physical Properties at the Single-Atom Level (10’ + 5’)

• Yongsoo Yang (UCLA)

Room: Room 510 To understand material properties and functionality at the fundamental level, it is essential to precisely determine their 3D atomic arrangement. For crystalline materials, crystallography can provide this information. However, perfect crystals are rare in nature. Real materials often contain crystal defects, surface reconstructions, nanoscale heterogeneities, and disorders, which strongly influence material properties and performance. Here, we present atomic electron tomography (AET) for 3D structure determination of crystal defects and disordered materials at the single-atom level. By combining the tomographic tilt series acquired from aberration corrected electron microscopes with advanced algorithms [1], we localized the coordinates of individual atoms and point defects in materials with a 3D precision of ~19 pm, and determined full 3D strain tensor [2]. More recently, we determined the 3D coordinates of 6,569 Fe and 16,627 Pt atoms in an FePt nanoparticle, and correlated chemical order/disorder and crystal defects with material properties at the individual atomic level [3]. [1] A. Pryor*, Y. Yang* et al., Sci. Rep. 7:10409 (2017). [2] R. Xu et al., Nature Mater. 14, 1099-1103 (2015). [3] Y. Yang et al., Nature 542, 75-79 (2017).

Tiered synchronization to traveling-wave state through a metastable state (10’ + 5’)

• Jinha Park (Seoul National University)

Room: Room 510

Surprises, puzzles, and job opportunities in the IBS (15’ + 10’)

• Steve Granick (UNIST IBS Center)

Room: Room 510

Raman studies of the antiferromagnetic phase transition in atomically thin NiPS3 (10’ + 5’)

• Kangwon Kim (Sogang University)

Room: Room 510

Chiral Edge Mode in the Coupled Dynamics of Magnetic Solitons in a Honeycomb Lattice (10’ + 5’)

• Se Kwon Kim (UCLA)

Room: Room 510

AKPA's Outstanding Young Research Award Ceremony (5') + Awardee Presentation (15' + 5')

• Myoung-Hwan Kim (University of Texas Rio Grande Valley)

Room: Room 510

Carrier injection enhancement via directly deposited thiol-molecules on MoS2 field-effect transistors (10’ + 5’)

• Kyungjune Cho (Seoul National University)

Room: Room 510

Understanding flowing soap films (10’ + 5’)

• Ildoo Kim (Brown University)

Room: Room 510 Flowing soap films are useful tools to simulate two-dimensional flows, but not all of their physical properties, e.g. elasticity, are well understood. The presence of surfactant not only gives rise of the elasticity that stabilized the two-dimensional slab of water, but also imparts it compressibility. To comprehend the hydrodynamics on soap films, it is desirable to measure the surface tension and the elasticity. In this talk, we present experimental measurements of these quantities. The elasticity is measured by using the gas-dynamics analogy of the soap film flows, and the surface tension is measured by balancing it to a known weight. The measurement are rationalized using two-parameter model.

Career Paths for Physicists (10' + 10') by Founder and President of QuantTera

• Matt Kim (QuantTera)

Room: Room 510

Panel Discussion on Career Opportunities and Development

• Myoung-Hwan Kim (University of Texas Rio Grande Valley)
• Takhee Lee (Seoul National University)
• Hyun-Tak Kim (ETRI)
• Kyungseon Joo (University of Connecticut)

Room: Room 510