EVENTS

受付中Zasshikai seminar 2026th, Prof. Martin Thuo, “Self-Assembled organometallics Derived Tunable optical, semiconductor and Magnetic Materials”

Feb.20

  • 日時
    2026/2/20 13:00-14:30
  • 会場
    5F Auditorium, Chemistry Main Bldg.
  • 講師
    Prof. Martin Thuo (Department of Material Science & Engineering, North Carolina State University, USA）
  • 演目
    “Self-Assembled organometallics Derived Tunable optical, semiconductor and Magnetic Materials”
  • 担当
    Prof. Teppei Yamada (Ext. 24346), Department of Chemistry, Graduate School of Science

Abstract:

Advances in flexible electronics and wearable electronics demand new low temperature solders while a changing climate calls for new affordable approaches to catalyst design or bandgap engineering. We couple fundamental surface thermodynamics and autonomous self-assembly processes to address these challenges. This talk explores the latter by using speciation in metal passivating oxide1 as a filter (gate) to controllably introduce metal ions into a solution where only low concentrations of the ions can exist.2 Coupling ion supply to precipitation allows for continuous product generation. Multi-metal center organometallic components/wires can therefore be made and either locally deposited or in situ self-assembled through polymerization-induced self-assembly of 1D organometallic adducts.3 This process, being a living polymerization ad infinitum growth, leads to high aspect ratio organometallic micro- to nanomaterials. Post-synthesis pyrolysis of the ligands leads to carbon-coated metal oxides that show catalytic activity atypical of the parent oxide4 and unique transistor behavior3 hinting to low-cost fabrication of diodes, gates, and other microelectronic components. Guided deposition of these adducts allows for multi-semiconductor FINFET morphologies to be realized without the need for typical complex fabrication processes.3 Similar approach with rare earths leads to tunable magnetic properties and realization of lanthanide based crystalline quantum spin liquids5 or tunable color materials.6 In conclusion, we highlight the versatility of nanoscale surfaces/interfaces in liquid metals as a pathway to neoteric materials or technologies.

References:

  1. J. Cutinho et al., 2018 ACSnano 12, 4744−4753; A. Martin, et. al. Angew. Chem.  2020 59, 352 – 357 Cademartiri, L.; et al. J. Phys. Chem. C 2012, 116 (20), 10848-10860, Sodhi, R. N. S.; et. al. Surf. Interface Anal. 2017, 49, 1309–1315
  2. B. S. Chang, et. al. Nanoscale 2019 11, 14060
  3. J.J. Chang, 2025 Materials Horizons 12, 770 – 778
  4. B. S. Chang, et. al. ACS Matt. Letts 2020 2, 1211-1217*
  5.  A. Jones et. al. Angew. Chem. In. Ed. 2026 (in press)
  6. A. Pauls et. al. Angew. Chem. In. Ed. 2024 63, e202318949
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