**7. Conclusions**

In accordance with the review proposed here, CNTs are very attractive as base material to the design of components for VLSI Design. Chemical modifications of CNTs allow to the designer improve the selectivity of the electrical properties for the different applications. In the future, the use of hybrid materials where carbon nanotubes are involved will be a priority, given that the use of composite materials to design electronic devices, circuits and sensors requires multiple physical and chemical properties that a unique material cannot provide by itself. In the search for reducing electrical resistance presented by carbon nanotubes, different strategies have been developed to improve the efficiency of interconnection between devices based on carbon nanotubes and metallic electrodes used to lead the electrical bias to them. The implementation of digital and analog circuits with CNFETs or graphene nanoribbons will produce a great advance toward VLSI design using nanoelectronics. Still, hurdles remain as it was described in each section of the chapter.
