[20a-E308-1~10] 12.2 Characterization and Materials Physics

▼ [20a-E308-5] Field-Effect-Induced Current Fluctuation in Patterned Self-Doped Polyaniline

〇(D)Jiannan BAO¹, Yoichi Otsuka¹, Yuki Usami¹, Takuya Matsumoto¹ (1.Osaka Univ.)

Keywords:self-doped polyaniline, noise generator, fountain-pen lithography

The electronic noise generator is one of necessary components in the development of bio-mimicking molecular devices. Herein, we describe a microscale noise generator, with self-doped polyaniline (SPAN) lines on SiO₂/Si substrate. We found the SPAN thin molecular line patterns, which were fabricated by fountain pen lithography, generates the current noise by optical stimulation. The current fluctuation showed a white-like power spectral density in the frequency range of 1~25 Hz. We proposed the mechanism of the noise generation in which the hopping conduction in SPAN lines were modulated due to the local electrical field generated by photoinduced carrier generation-recombination at the SiO₂/Si interface.