Zarina Gagkaeva

Zarina Gagkaeva
Moscow Institute of Physics and Technology | MIPT · Laboratory of Terahertz Spectroscopy

Master of Science

About

15
Publications
942
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38
Citations
Additional affiliations
September 2014 - present
Moscow Institute of Physics and Technology
Position
  • Engineer
Education
September 2011 - July 2015
Moscow Institute of Physics and Technology
Field of study
  • Applied Physics and Mathematics

Publications

Publications (15)
Article
Recent publications on spectroscopy of water layers in water bridge structures revealed a significant enhancement of the proton mobility and the dielectric contribution of translational vibrations of water molecules in the interfacial layers compared to bulk water. Herewith, the results of long-term studies of proton dynamics in solid-state acids h...
Chapter
Full-text available
In this study, the terahertz-infrared spectra of extracellular matrix and filaments of S. oneidensis bacteria, bovine heart cytochrome c and bovine serum albumin were examined by means of Fourier-transform infrared spectroscopy technique. The absorption lines of water and aqueous cations hydronium H3O⁺ and Zundel H5O2⁺ were detected, of the highest...
Article
Full-text available
Conductive biomolecular systems are investigated for their promise of new technologies. One biomolecular material that has garnered interest for device applications is eumelanin. Its unusual properties have led to its incorporation in a wide set of platforms including transistor devices and batteries. Much of eumelanin's conductive properties are d...
Article
Full-text available
Employing optical spectroscopy we have performed a comparative study of the dielectric response of extracellular matrix and filaments of electrogenic bacteria Shewanella oneidensis MR-1, cytochrome c, and bovine serum albumin. Combining infrared transmission measurements on thin layers with data of the terahertz spectra, we obtain the dielectric pe...
Article
Full-text available
For decades respiratory chain and photosystems were the main firing field of the studies devoted to mechanisms of electron transfer in proteins. The concept of conjugated lateral electron and transverse proton transport during cellular respiration and photosynthesis, which was formulated in the beginning of 1960-s, has been confirmed by thousands o...
Data
Scheme illustrating the change of water-metal surface with increasing humidity. At each particular RH level, there is a water layer lying between IBID Pt contacts above the bacterial nanofilament. Having reached a certain critical RH value, the thickness of the water layer overcomes 100–150 nm contact height and 300 nm of Au pads. At low humidity l...
Data
Tabulated Raman spectroscopy data. (PDF)
Data
Empty-circuit test structure DC I-V curves in dependence on RH. Comparing to Fig 3a no perceptible difference can be observed. (TIFF)
Article
The origin of low-energy excitations in the polycrystalline Eu0.42Sr0.58MnO3 manganite is explored by terahertz and infrared spectroscopies. The transition from the charge and/or orbital to antiferromagnetic order (TN=130−140K) is seen as smooth (spread over a temperature range from 50 to 100 K) decrease of free-carrier conductivity with the activa...
Article
Full-text available
The electrodynamics of metals is well understood within the Drude conductivity model; properties of insulators and semiconductors are governed by a gap in the electronic states. But there is a great variety of disordered materials that do not fall in these categories and still respond to external field in an amazingly uniform manner. At radiofreque...
Conference Paper
Ac conductivity and dielectric permittivity of bovine serum albumin, cytochrome c and extracellular matrix synthesized by electrogenic bacteria Shewanella oneidensis MR-1 are measured at frequencies 1–10 12 Hz and temperatures 10–300 K. Two types of conductivity mechanisms are observed as well as nearly constant loss (NCL) phenomenon, universal die...
Conference Paper
Full-text available
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...

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