中央研究院院士奈米論壇

Workshop on “Science in Nanoscale” -

1. Imaging Single Molecule Chemistry (Wilson Ho)
2. Computational Studies of Nanomaterials in Two Dimensions (Mei-Yin Chou)

    Date: July 1, 2016 (Friday), 10:00-12:00 Venue: Dr. Poe Auditorium, Institute of Atomic and Molecular Sciences, Academia Sinica (on NTU campus) 中研院原分所浦大邦紀念講堂 (台大校總區) Speakers: Dr. Wilson Ho (何文程院士), Imaging Single Molecule Chemistry Dr. Mei-Yin Chou (周美吟院士), Computational Studies of Nanomaterials in Two Dimensions Registration closes when full capacity is reached. Contact: Miss Wenhui Chen 陳文慧小姐 Tel: (02) 2366-8275, email: whchen@gate.sinica.edu.tw --------------------------------------------------------------------------------------------------------------

    Abstract-1: Imaging Single Molecule Chemistry

    Wilson Ho University of California, Irvine Single molecule chemistry can now be probed at unprecedented spatial resolution with a low temperature scanning tunneling microscope (STM) in ultrahigh vacuum. Advances in this field have provided new measurements and insights into the structure and function of molecules through real space imaging and high resolution vibrational spectroscopy. The combination of the STM with optical spectroscopy and femtosecond lasers has added a new dimension of time to space and enabled the probing of single molecule dynamics in light-matter interaction with better than 0.1 nm resolution. The ability to visualize single molecule chemistry has reinvigorated the study of molecules, their transformations, and intermolecular interactions on solid surfaces. Much of the scientific advancement and understanding in surface chemistry have derived from the well-defined conditions that have long been championed by surface science in providing unambiguous results that are appealing to the theoretical and experimental communities. Imaging single molecule chemistry has a broader impact on general chemistry due principally to direct visualization of molecules, their inner machinery and intermolecular interactions at the limit of space and time.

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    Abstract-2: Computational Studies of Nanomaterials in Two Dimensions

    Mei-Yin Chou Institute of Atomic and Molecular Sciences, Academia Sinica, and Department of Physics, National Taiwan University It has become possible in recent years to fabricate and manipulate two-dimensional nanomaterials in the laboratory that are as thin as one to few atomic layers. The reduced dimensionality gives rise to unique physical and chemical properties that differ from those of traditional bulk materials, and intriguing physics has been found in these few-layer systems. In this talk, I will focus on a few representative systems, including twisted bilayer graphene and monolayers of transition metal dichalcogenides that exhibit properties ranging from normal semiconductors to charge density waves to superconductivity. I will discuss our recent theoretical and computational studies to explore the connections among charging, lattice distortion, electronic properties, charge density waves, and superconductivity.

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