Anomalous phonon diffusion in isotopically disordered armchair-edge graphene nanoribbons

2018.12.03

Nobuya Mori, Osaka University

It is possible to control the thermal conductance of materials independently from the electrical conductance by utilizing the isotopic doping method.  We have studied effects of isotope impurities on the phonon transport in isotopically disordered armchair-edge graphene nanoribbons (AGNRs).

【AWARD】Professor Kazuhiko Hirakawa won Leo Esaki Prize

2018.12.03

Professor Kazuhiko Hirakawa, belonging to the University of Tokyo, won Leo Esaki Prize.

Biosensor response from target molecules with inhomogeneous charge localization

2018.11.13

Yoshihiro Kobayashi, Osaka University

Carbon nanotube thin film transistors (CNT-TFTs) have been utilized for highly sensitive detection of biomolecules. In principle, the sensor response is originated from conductivity change of channel CNT film caused by the effective charge of target molecules near CNT surface within the Debye length. Accordingly, the charge distribution in the target molecule and its interaction with CNT channel should strongly affect the sensor behavior.

【 Press release】 In-Situ Tailoring of Single-Cycle THz Near Field in a Tunnel Junction

2018.10.31

Jun Takeda, Yokohama National University

Light-field-driven processes occurring under conditions far beyond the diffraction limit of the light can be manipulated by harnessing spatiotemporally tunable near fields. A tailor-made carrier envelope phase in a tunnel junction formed between nanogap electrodes allows precisely controlled manipulation of these processes. In this study, we demonstrate that desirable phase-controlled near fields can be produced in a tunnel junction via terahertz scanning tunneling microscopy (THz-STM) with a broadband THz phase shifter.