Electronic transport upon adsorption of biomolecules on graphene

Currently, the construction of sensors plays an important role in electronics and bioelectronics, due to the wide range of novel applications for biomedical research, food quality control and environmental monitoring. The sensors for biological application demand materials with special properties, such as: sensitivity, selectivity, biocompatibility, high electronic mobility, low electronic noise and chemical functionality. Due to its unique physical and chemical properties, the graphene has emerged as a suitable candidate for making sensors, since it largest known surface-to-volume ratio; highcharge carrier mobility of up to 200.000 cm2 V−1 s−1 at electron densities of ≈ 2 ×1011 cm−2 , which is significantly higher than that of silicon