Graphene and related two-dimensional (2D) materials promise unprecedented advancements in device performance at the atomic level, and a synergistic combination of 2D materials and silicon chips promises a heterogeneous platform with massively enhanced potential based on silicon technology. Integration is accomplished through three-dimensional monolithic construction of multifunctional high-rise 2D silicon chips, allowing for improved performance by utilising the vertical direction and functional diversification of the silicon platform for applications in optoelectronics and sensing.