  Even if Moore's Law continues to hold, it will take about 250 years to fill
the performance gap between present-day computer and the ultimate computer
determined from the laws of physics alone. Information processing technology in
the post-CMOS era will likely consist of a heterogeneous set of novel device
technologies that span a broad range of materials, operational principles, data
representations, logic systems and architectures. Molecular nanostructures
promise to occupy a prominent role in any attempt to extend charge-based device
technology beyond the projected limits of CMOS scaling. We discuss the
potentials and challenges of molecular electronics and identify the fundamental
knowledge gap that needs to be addressed for a successful introduction of
molecule-enabled computing technology
