This thesis is devoted to fabrication of graphene devices and investigation of thermoelectric effects in them.
Graphene is a wonderful material, which was discovered 10 years ago. It has very rich spectrum of properties, many of them can be very useful in various applications. Graphene became one of the hottest fields in modern physics.
The electronic properties of graphene can be easily affected by the ambient. In order to fabricate reliable graphene devices, it is beneficial to encapsulate it inside an insulator. The method to get the devices of highest quality relies on encapsulating graphene in hexagonal boron nitride. However, this method is very complicated and is not suitable for industrial applications.
In this work an alternative technology of graphene device fabrication is suggested - encapsulating in Parylene. This technology provides potential scalability, which would be very useful for industry. The quality of the fabricated devices is high enough for many applications. One of such applications is presented in this work: thermoelectric hot-electron bolometers are fabricated and investigated. These bolometers show the responsivity and noise level comparable to the other high-frequency detectors. The main advantages of our bolometers are the fast response time and the wide working temperature range - from room- down to cryogenic temperatures.
After further optimization, the presented thermoelectric bolometers can potentially be used for various applications.