Publications of Takashi Kumagai

Journal Article (36)

2022
Journal Article
Cirera, B., Y. Litman, C. Lin, A. Akkoush, A. Hammud, M. Wolf, M. Rossi and T. Kumagai: Charge Transfer-Mediated Dramatic Enhancement of Raman Scattering upon Molecular Point Contact Formation. Nano Letters 22 (6), 2170–2176 (2022).
Journal Article
Cirera, B., M. Wolf and T. Kumagai: Joule Heating in Single-Molecule Point Contacts Studied by Tip-Enhanced Raman Spectroscopy. ACS Nano, in press.
Journal Article
Liu, S., M. Wolf and T. Kumagai: Nanoscale Heating of an Ultrathin Oxide Film Studied by Tip-Enhanced Raman Spectroscopy. Physical Review Letters 128 (20), 206803 (2022).
Journal Article
Martin Sabanés, N., F. Krecinic, T. Kumagai, F. Schulz, M. Wolf and M. Müller: Femtosecond Thermal and Nonthermal Hot Electron Tunneling Inside a Photoexcited Tunnel Junction. ACS Nano 16 (9), 14479–14489 (2022).
2021
Journal Article
Liu, S., A. Hammud, M. Wolf and T. Kumagai: Atomic Point Contact Raman Spectroscopy of a Si(111)-7 × 7 Surface. Nano Letters 21 (9), 4057–4061 (2021).
Journal Article
Liu, S., A. Hammud, M. Wolf and T. Kumagai: Anti-Stokes Light Scattering Mediated by Electron Transfer Across a Biased Plasmonic Nanojunction. ACS Photonics 8 (9), 2610–2617 (2021).
2020
Journal Article
Kumagai, T.: Turn on Nanolight in a Tiny Gap: Photophysical and photochemical phenomena are directly observable using low-temperature scanning tunneling microscopy combined with plasmonics. Vakuum in Forschung und Praxis 32 (5), 33–37 (2020).
Journal Article
Kumagai, T.: Turn on Nanolight in a Tiny Gap: Photophysical and photochemical phenomena are directly observable using low-temperature scanning tunneling microscopy combined with plasmonics. Physik Journal 19 (8/9), 59–62 (2020).
Journal Article
Kumagai, T.: Sub-molecular photoluminescence. Nature Photonics 14 (11), 653–657 (2020).
Journal Article
Liu, S., B. Cirera, Y. Sun, I. Hamada, M. Müller, A. Hammud, M. Wolf and T. Kumagai: Dramatic Enhancement of Tip-Enhanced Raman Scattering Mediated by Atomic Point Contact Formation. Nano Letters 20 (8), 5879–5884 (2020).
2019
Journal Article
Böckmann, H., S. Liu, M. Müller, A. Hammud, M. Wolf and T. Kumagai: Near-Field Manipulation in a Scanning Tunneling Microscope Junction with Plasmonic Fabry-Pérot Tips. Nano Letters 19 (6), 3597–3602 (2019).
Journal Article
Böckmann, H., M. Müller, A. Hammud, M.G. Willinger, M. Pszona, J. Waluk, M. Wolf and T. Kumagai: Near-Field Spectral Response of Optically Excited Scanning Tunneling Microscope Junctions Probed by Single-Molecule Action Spectroscopy. The Journal of Physical Chemistry Letters 10, 2068–2074 (2019).
Journal Article
Lin, C., E. Durant, M. Persson, M. Rossi and T. Kumagai: Real-Space Observation of Quantum Tunneling by a Carbon Atom: Flipping Reaction of Formaldehyde on Cu(110). The Journal of Physical Chemistry Letters 10 (3), 645–649 (2019).
Journal Article
Lin, C., K. Ikeda, Y. Shiota, K. Yoshizawa and T. Kumagai: Real-space observation of far- and near-field-induced photolysis of molecular oxygen on an Ag(110) surface by visible light. The Journal of Chemical Physics 151 (14), 144705 (2019).
Journal Article
Litman, Y., J.O. Richardson, T. Kumagai and M. Rossi: Elucidating the Nuclear Quantum Dynamics of Intramolecular Double Hydrogen Transfer in Porphycene. Journal of the American Chemical Society 141 (6), 2526–2534 (2019).
Journal Article
Liu, S., M. Müller, Y. Sun, I. Hamada, A. Hammud, M. Wolf and T. Kumagai: Resolving the Correlation between Tip-Enhanced Resonance Raman Scattering and Local Electronic States with 1 nm Resolution. Nano Letters 19 (8), 5725–5731 (2019).
2018
Journal Article
Böckmann, H., S. Gawinkowski, J. Waluk, M.B. Raschke, M. Wolf and T. Kumagai: Near-Field Enhanced Photochemistry of Single Molecules in a Scanning Tunneling Microscope Junction. Nano Letters 18 (1), 152–157 (2018).
Journal Article
Koch, M., Z. Li, C. Nacci, T. Kumagai, I. Franco and L. Grill: How Structural Defects Affect the Mechanical and Electrical Properties of Single Molecular Wires. Physical Review Letters 121 (4), 047701 (2018).
Journal Article
Kumagai, T., J. Ladenthin and I. Hamada: Direct observation of van der Waals two-dimensional crystal and small clusters of methane on copper surfaces. Physical Review Materials 2 (9), 093403 (2018).
Journal Article
Kumagai, T., J. Ladenthin, Y. Litman, M. Rossi, L. Grill, S. Gawinkowski, J. Waluk and M. Persson: Quantum tunneling in real space: Tautomerization of single porphycene molecules on the (111) surface of Cu, Ag, and Au. The Journal of Chemical Physics 148 (10), 102330 (2018).
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