Scientific research and applicaions by Rusgraphene
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Research and development

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Many years of experience in researching carbon nanomaterials makes it possible to assess the potential of modern technologies, and the inquiring mind and experimental skills of employees allow us to realize any incredible ideas.
Flexible transparent conductive coatings and films
As it is well known, graphene has high electrical conductivity (electrical resistance below 500 Ohms per square or less than 2.5 * 10^(-7) Ohms * m) and high optical transparency (transmittance 97.7%). Graphene is also a very strong and flexible material. Due to the combination of these properties, graphene can be used as an electrode in solar panels or in touch screens of various electronic devices.
We synthesized graphene films, then transferred it to a surface of PET-polymer (polyethylene terephthalate) with a thickness of 50 micrometers and connected the crown batteries and the red LED. The simplest flexible transparent conductive film based on graphene is ready! see the figure on the right.
синетза графена на никеле
нелинейные свойства графена
Nonlinear optical elements for generating ultrashort laser pulses
Graphene has nonlinear optical properties. Namely, when the power density of the incident laser radiation is less than 100 kW per square cm, the graphene monolayer absorbs 2.3% of the intensity of the incident radiation, while with an increase in the density of the incident radiation above 100 kW per square cm in graphene absorption is saturated, and it begins to transmit incident light.
According to the described phenomenon of absorption saturation in graphene, passive nonlinear optical elements work in the formation of ultrashort laser pulses. In other words, the laser goes into self-mode locking regime and pulses with higher peak power and a duration of hundreds of femtoseconds are formed from continuous radiation.
The figure on the left shows a diagram of a fiber laser with a ring resonator. A graphene film is deposited on a fiber section. At the input of the experiment, pulses of a duration of 380 fs were obtained.
Graphene has a number of advantages over existing Semiconductor Saturable Absorber Mirror (SESAM) counterparts.
Detector of terahertz radiation
A sub-terahertz detector (THz) (129-450 GHz) based on single-layer graphene films and graphene ribbons with asymmetric source and drain contacts (vanadium and gold) was developed. Vanadium forms a barrier at the graphene boundary, and gold forms an ohmic contact. It was shown that at low temperatures (77K) the sensitivity of the detector increases with increasing frequency of the incident sub-THz radiation.