Achieving atomic level smoothness is crucial in nanotechnology for several reasons. Firstly, it enhances the performance of nanodevices by minimizing friction and wear. This is particularly important in nano-electromechanical systems (NEMS) and micro-electromechanical systems (MEMS) where surface interactions can significantly impact device functionality. Secondly, atomic smoothness is essential for optimizing surface interactions in chemical and biological applications, improving the efficiency of sensors and catalysts.