However, both reactions are fast and self-terminate in less than 3 min. Interestingly, the bands in the first cycle are shifted with respect to those appearing in later cycles. Furthermore, the peak area in the first cycle differs drastically from later cycles for which it remains virtually constant. Firstly, this indicates that the surface is already completely and uniformly covered from cycle 2 onwards. Secondly, more -NMe2 species are formed upon nucleation in the first half cycle and are also lost in the second half cycle than in the subsequent ones.