<p>The most useful and versatile digital components are the adders due to which their design in cellular automata is also considerably gaining attention. Although many adder circuits have been designed using quantum dot cellular automata (QCA) technology, not much work is reported on the design of fast adders. Fast adders are crucial for enhancing the speed and efficiency of arithmetic operations, making them the foundation of high-performance circuits and systems. The fast adders are the fundamental elements of fast operating circuits and systems. In this work adders implemented so far in literature have been thoroughly studied and after an in-depth analysis a new full adder designed is proposed. The different possible layouts are plotted and the most optimized version of the full adder using only 12 cells which is by the far the most optimum is designed. Using the new proposed adder, the layouts of fast adders have been proposed for nanotechnology application. The proposed designs and already implemented adders are compared highlighting the supremacy of the proposed designs.</p>