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National Repository of Grey Literature 4 records found  Search took 0.01 seconds. 
In-situ mapping of charge distribution and transport response of nanostructures fabricated by scanning probe microscopy on graphene Hall bars
 Přikryl, Vojtěch ; Frank, Otakar (referee) ; Bartošík, Miroslav (advisor)
Graphene is a material suitable for electronic applications including sensors and biosensors operating in atmospheric conditions and at varying relative humidities. This work concerns the charge diffusion in Hall bar shaped graphene based field effect transistor that is simultaneously investigated by Kelvin probe force microscopy and macroscopic transport measurement. Furthemore it studies the possibilities of graphene Hall bar modification by local anodic oxidation, local cathodic hydrogenation and mechanical lithography.
Detailed record
Measurement of graphene transport properties
 Nečesal, Daniel ; Procházka, Pavel (referee) ; Kormoš, Lukáš (advisor)
In order to create electronic devices utilizing graphene, it is necessary to manu- facture large sheets of high quality graphene which can be achieved by chemical vapor deposition (CVD). Mobility plays an important role in determining quality of graphene sheet because it is inversely proportional to concentration of defects. In this work, CVD graphene samples were fabricated, and their transport properties were characterized by van der Pauw and Hall bar methods. Graphene was transferred to samples either by using Fe(NO3)3 solution or via electrolytic delamination process. Both methods yiel- ded highly p-doped graphene. The electrolytic delamination transfer process resulted in a higher mobility of the graphene sheet and the Dirac point was observed due to a significant doping decrease.
Detailed record
In-situ mapping of charge distribution and transport response of nanostructures fabricated by scanning probe microscopy on graphene Hall bars
 Přikryl, Vojtěch ; Frank, Otakar (referee) ; Bartošík, Miroslav (advisor)
Graphene is a material suitable for electronic applications including sensors and biosensors operating in atmospheric conditions and at varying relative humidities. This work concerns the charge diffusion in Hall bar shaped graphene based field effect transistor that is simultaneously investigated by Kelvin probe force microscopy and macroscopic transport measurement. Furthemore it studies the possibilities of graphene Hall bar modification by local anodic oxidation, local cathodic hydrogenation and mechanical lithography.
Detailed record
Measurement of graphene transport properties
 Nečesal, Daniel ; Procházka, Pavel (referee) ; Kormoš, Lukáš (advisor)
In order to create electronic devices utilizing graphene, it is necessary to manu- facture large sheets of high quality graphene which can be achieved by chemical vapor deposition (CVD). Mobility plays an important role in determining quality of graphene sheet because it is inversely proportional to concentration of defects. In this work, CVD graphene samples were fabricated, and their transport properties were characterized by van der Pauw and Hall bar methods. Graphene was transferred to samples either by using Fe(NO3)3 solution or via electrolytic delamination process. Both methods yiel- ded highly p-doped graphene. The electrolytic delamination transfer process resulted in a higher mobility of the graphene sheet and the Dirac point was observed due to a significant doping decrease.
Detailed record

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