K. Motovilov, Z. Gagkaeva, L. Kadyrov, E. Zhukova, A. S. Tobokhova, V. Torgashev, M. Savinov, V. Grinenko, M. Belyanchikov, K. Sidoruk, M. Dressel, B. Gorshunov
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Terahertz and infrared spectroscopy of bacterial nanofilaments
By means of terahertz and infrared (THz, IR) spectroscopies we have measured the dielectric response of nano-filaments of electrogenic bacteria Shewanella oneidensis MR-1 in a wide frequency and temperature ranges. THz-far-IR spectra are dominated by absorption due to bound water. At helium temperatures and at sub-THz frequencies a boson-peak-like excitation is detected that is typical for disordered materials. The observation is in agreement with the heat capacity measurements.
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